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Artykuły w czasopismach na temat „Remaining leaf area”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 19 lutego 2022

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1

Liu, Guofan, and Kent D. Kobayashi. "250 Using Leaf Area Devices (LADS) to Estimate Total Leaf Area of Coffee Plants." HortScience 34, no. 3 (June 1999): 485C—485. http://dx.doi.org/10.21273/hortsci.34.3.485c.

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It is difficult to estimate the total leaf area of coffee plants with accuracy due to the large number of leaves and the high leaf density of the plant canopy. In 1996, on Maui, Hawaii, 98 leaves of various sizes were randomly collected for each of five cultivars of Coffea arabica L. The cultivars used were `Guadalupe', `Guatemalan', `Mokka', `Red Catuai', and `Yellow Caturra'. Leaf length, width, and area were measured. Seventy-five leaves were used to develop leaf area models, and the remaining leaves were used to test the accuracy of the models using a 1:1 line. We then developed leaf area

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2

Bueno, Adeney de Freitas, Benjamin Zechmann, William Wyatt Hoback, Regiane Cristina Oliveira de Freitas Bueno, and Odair Aparecido Fernandes. "Serpentine leafminer (Liriomyza trifolii) on potato (Solanum tuberosum): field observations and plant photosynthetic responses to injury." Ciência Rural 37, no. 6 (December 2007): 1510–17. http://dx.doi.org/10.1590/s0103-84782007000600001.

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Serpentine leafminers, Liriomyza spp. (Diptera: Agromyzidae), are polyphagous insects that feed on numerous crops worldwide including potato. Recently, leafminer larvae (Liriomyza trifolii) have become an economically important pest of potato. The larvae eat the mesophyll of leaflets leaving long winding tunnels inside the leaflets. The photosynthetic effects of larval tunneling on the remaining leaf tissue are unknown. In 2003, physiological responses of potato to leafminer, L. trifolii were evaluated in Kearney, Nebraska, USA. The leaflets were examined 7 and 14 days post infestation for lea

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3

Ribeiro, Ana Maria Alves de Souza, Daniel Alves Mundim, Daisy Cristina Martins Mendonça, Karina Tiemi Hassuda dos Santos, Jéssica Sayuri Hassuda Santos, Vinicius de Souza Oliveira, Gleyce Pereira Santos, et al. "Leaf Area Estimation of Garden Boldo From Linear Dimensions." Journal of Agricultural Science 11, no. 5 (April 15, 2019): 461. http://dx.doi.org/10.5539/jas.v11n5p461.

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The objective of this work was to determine a mathematical equation using linear measures that allows estimating a leaf area of the specie Plectranthus barbatus Andrews, a plant with medicinal properties popularly known as garden boldo. For this was performed a direct measurement of the leaf blade considering the length (L) along the midrib and the maximum width (W) perpendicular to the midrib of 500 leaves of different specimens and the observed foliar area (OLA), which were obtained by digitized images. A regression study with linear, quadratic, potential and exponential models was performed

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4

Simon, J. C., M. L. Decau, J. C. Avice, A. Jacquet, F. Meuriot, and J. M. Allirand. "Effects of initial N reserve status and residual leaf area after cutting on leaf area and organ establishment during regrowth of alfalfa." Canadian Journal of Plant Science 84, no. 4 (October 1, 2004): 1059–66. http://dx.doi.org/10.4141/p03-118.

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Nitrogen reserves in remaining organs and residual leaf area after cutting have long been recognized as key factors during alfalfa (Medicago sativa L.) regrowth. The present work examined which morphological components were influenced by contrasting initial N status and residual leaf area during 29 d of regrowth after cutting at 15 cm height. Two levels of initial N reserves (high and low) and of residual leaf areas (not or completely defoliated) were combined in four treatments. Both factors affected shoot dry matter (DM) production at the end of regrowth. The increase in DM of new organs obs

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5

Rubinstein, Adriana, and Heraldo L. Vasconcelos. "Leaf-litter decomposition in Amazonian forest fragments." Journal of Tropical Ecology 21, no. 6 (October 19, 2005): 699–702. http://dx.doi.org/10.1017/s0266467405002762.

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Most of the forests of the Amazon basin grow on nutrient-poor soils (Jordan 1982). Despite this, these forests remain productive through a variety of nutrient conservation mechanisms and a very effective system of organic matter decomposition and nutrient cycling (Jordan 1982). When an area of forest is fragmented however, the remaining patches experience modified microclimatic conditions (Camargo & Kapos 1995, Didham & Lawton 1999), and changes in floristic composition (Laurance et al. 1998), which can affect the decomposer community (Didham et al. 1996, Souza & Brown 1994) and co

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6

Barclay, Hugh J., and Doug Goodman. "Conversion of total to projected leaf area index in conifers." Canadian Journal of Botany 78, no. 4 (April 21, 2000): 447–54. http://dx.doi.org/10.1139/b00-020.

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Several definitions of leaf area index (LAI) presently exist in the literature but the relationships among them are not clear. To compare the results of various studies, there is a need to convert from one definition to another. Factors for converting among four definitions of LAI are presented for six conifer species: Abies grandis (Dougl. ex D. Don) Lindl., Thuja plicata Donn ex D. Don., Tsuga heterophylla (Raf.) Sarg., Picea sitchensis (Bong.) Carr.), Pinus contorta Dougl., and Pseudotsuga menziesii (Mirb) Franco). Among the four definitions of LAI, the two extremes involve (i) the total ar

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7

Huang, Weiwei, David Ratkowsky, Cang Hui, Ping Wang, Jialu Su, and Peijian Shi. "Leaf Fresh Weight Versus Dry Weight: Which is Better for Describing the Scaling Relationship between Leaf Biomass and Leaf Area for Broad-Leaved Plants?" Forests 10, no. 3 (March 13, 2019): 256. http://dx.doi.org/10.3390/f10030256.

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Leaf dry mass per unit area (LMA) is considered to represent the photosynthetic capacity, which actually implies a hypothesis that foliar water mass (leaf fresh weight minus leaf dry weight) is proportional to leaf dry weight during leaf growth. However, relevant studies demonstrated that foliar water mass disproportionately increases with increasing leaf dry weight. Although scaling relationships of leaf dry weight vs. leaf area for many plants were investigated, few studies compared the scaling relationship based on leaf dry weight with that based on leaf fresh weight. In this study, we used

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8

Kwon, Kei-Jung, Uuriintuya Odsuren, Sang-Yong Kim, Jong-Cheol Yang, and Bong-Ju Park. "Comparison of the Particulate Matter Removal Capacity of 11 Herbaceous Landscape Plants." Journal of People, Plants, and Environment 24, no. 3 (June 30, 2021): 267–75. http://dx.doi.org/10.11628/ksppe.2021.24.3.267.

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Background and objective Particulate matter (PM) has a fatal effect on health. There have been many studies on the use of plants such as trees and shrubs as eco-friendly and sustainable biofilter for the removal of PM. In forming more green space, ground cover plants play an important role in multi-layered planting. This study was conducted to investigate the ability of plants to reduce PM, targeting Korean native ground cover plants with high availability in urban green spaces. Methods For 4 species of Asteraceae, 4 species of Liliaceae, and 3 species of Rosaceae, one species of plants at a t

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9

Tang, Yi Lin, Ben Zhi Zhou, Xiao Gai Ge, Xiao Ming Wang, and Qian Li. "Leaf-Litter Decomposition Dynamic, Carbon Loss and Nutrient Return for Moso Bamboo Forest with Different Litter Mass Accumulation." Advanced Materials Research 726-731 (August 2013): 4222–25. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.4222.

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To provide an important basic knowledge for the biogeochemical cycle of bamboo forest ecosystem, particularly the cycling of global carbon, we studied decomposition dynamics of leaf-litter with different mass accumulation in moso bamboo forest. Our study area located in Miaoshanwu nature reserve, Fuyang, Zhejiang province. Based on the survey, we concluded that: (1) the sequence of remaining mass of leaf-litter with different mass accumulation after 240 days' decomposition from the most to the least was in the following order: 30g (58.53%) > 60g (51.92%) > 90g (48.48%), implying that lea

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Lopes, Daniela B., and Richard D. Berger. "The Effects of Rust and Anthracnose on the Photosynthetic Competence of Diseased Bean Leaves." Phytopathology® 91, no. 2 (February 2001): 212–20. http://dx.doi.org/10.1094/phyto.2001.91.2.212.

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The effects of rust (caused by Uromyces appendiculatus) and anthracnose (caused by Colletotrichum lindemuthianum) and their interaction on the photosynthetic rates of healthy and diseased bean (Phaseolus vulgaris) leaves were determined by gas-exchange analysis, in plants with each disease, grown under controlled conditions. The equation Px/P0 = (1 - x)β was used to relate relative photosynthetic rate (Px/P0) to proportional disease severity (x), where β represents the ratio between virtual and visual lesion. The β values obtained for rust were near one, indicating that the effect of the patho

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11

Alvim, Karen Rodrigues de Toledo, Césio Humberto de Brito, Afonso Maria Brandão, Luiz Savelli Gomes, and Maria Teresa Gomes Lopes. "The effect of leaf area reduction on corn plants during the reproduction phase." Revista Ceres 58, no. 4 (August 2011): 413–18. http://dx.doi.org/10.1590/s0034-737x2011000400002.

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Reduction in leaf area in corn plants during reproduction changes physiological metabolism and consequently the accumulation of dry matter in grains. The aim of this work was to study changes in agronomic characteristics caused by defoliation in corn during the reproduction phase. The experiment was carried out in Uberlândia, Minas Gerais state, in the agricultural year 2007/2008. The experiment was arranged in a randomized block design, consisting of seven treatments: control without defoliation, removal of two apical leaves, removal of four apical leaves, removal of all leaves above spike, r

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12

Rosenzweig, V. E., and D. V. Goloenko. "Breeding strategies for soybean canopy structure optimization in dry regions." Oil Crops 186, no. 2 (June 30, 2021): 24–30. http://dx.doi.org/10.25230/2412-608x-2021-2-186-24-30.

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Water supply is one of the key factors limiting soybean yield. Coming from the monsoon climate region, soybean lacks effective means of leaf surface growth restriction and is prone to produce excessive leaf area that leads to undesirable transpiration increase. Reducing branching rate and, correspondingly, leaf number per plant is usually proposed to decrease leaf area. However, as far as branching ability is generally a useful trait contributing to yield stability, we have undertaken a search for possible alternative ways of leaf area reduction. Soybean canopy structure was studied in our ger

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13

Marler, Thomas E., and Anders J. Lindström. "Leaf Nutrient Relations of Cycads in a Common Garden." Tropical Conservation Science 14 (January 2021): 194008292110365. http://dx.doi.org/10.1177/19400829211036570.

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Background and Aims Research required to clarify leaf nutrient relations of cycad species has been inadequate. Common garden studies are useful for determining the influence of genetics on leaf traits because of the homogeneous environment among experimental units. To date, there have been no common garden studies which included all ten genera of cycads. The full phylogenetic breadth has, therefore, not been included in this important area of study. Methods We examined macronutrient and micronutrient content of leaves from one representative species from each of the ten cycad genera at Nong No

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14

Damascos, Maria Angélica, Carlos Cesar Ronquim, and Carlos Henrique Britto Assis Prado. "Gas exchange and plant growth after defoliation on Leandra lacunosa, a cerrado woody species with continuous leaf production." Brazilian Archives of Biology and Technology 48, no. 6 (November 2005): 967–74. http://dx.doi.org/10.1590/s1516-89132005000800013.

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Morphological and physiological leaf traits were studied on control and defoliated potted Leandra lacunosa young plants. After defoliation, remaining bottom leaves showed no significant change in net photosynthesis and stomatal conductance values with time, but the leaf transpiration rate was higher. The production of the new leaves was greater after defoliation in top defoliated plants. Bottom defoliated plants increased stem extension rates and net photosynthesis transitorily. Two months after defoliation, control and defoliated plants did not differ in stem length and root dry mass values.

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15

Begum, Abida, and S. Harikrishna. "Evaluation of Some Tree Species to Absorb Air Pollutants in Three Industrial Locations of South Bengaluru, India." E-Journal of Chemistry 7, s1 (2010): S151—S156. http://dx.doi.org/10.1155/2010/398382.

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With the fast growing and excessive increase in industrial projects in Bengaluru, the level of pollution is also increasing. Metal-accumulating woody species have been considered for phytoextraction of metal-contaminated sites. The study examined the air pollution tolerance indices (APTI) of plant species around three industrial areas of south Bengaluru. The physiological and biochemical parameters, which are relative to leaf's water content (RWC), ascorbic acid content (AA), total leaf chlorophyll (TCh) and leaf extract pH were used to compute the APTI values and three heavy metals were selec

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16

Meyer, G. A. "Mechanisms promoting recovery from defoliation in goldenrod (Solidago altissima)." Canadian Journal of Botany 76, no. 3 (March 1, 1998): 450–59. http://dx.doi.org/10.1139/b98-004.

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Plant responses to defoliation were examined using Solidago altissima and a leaf-chewing beetle (Trirhabda sp.). Plants were exposed to five intensities of defoliation (ranging from 0 to 85% leaf area loss) and effects on carbon gain, vegetative growth, and flowering were determined. Defoliated plants partially restored their capacity for carbon gain in the following ways: (i) activity of damaged leaves remaining after defoliation was increased via delayed senescence and enhanced photosynthetic rates and (ii) regrowth leaves on damaged plants had higher specific leaf area (leaf area per leaf m

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17

Uieda, VS, and EM Carvalho. "Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream." Brazilian Journal of Biology 75, no. 2 (May 2015): 405–13. http://dx.doi.org/10.1590/1519-6984.15013.

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Through a manipulative experiment, the colonization of leaf litter by invertebrates was investigated in two sections of a tropical stream (spatial scale) that differed in function of the canopy cover, one with the presence (closed area) and another without riparian vegetation (open area), during one month of the dry and one of the wet season (temporal scale). The work aimed to verify differences related to four variables: season, canopy cover, leaf type and leaf condition. Litter bags containing arboreal and herbaceous leaves (leaf type variable), non-conditioned and preconditioned (leaf condi

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18

Dodds, Darrin M., Daniel B. Reynolds, Joseph H. Massey, M. Cade Smith, and C. H. Koger. "Effect of Adjuvant and Urea Ammonium Nitrate on Bispyribac Efficacy, Absorption, and Translocation in Barnyardgrass (Echinochloa crus-galli). II. Absorption and Translocation." Weed Science 55, no. 5 (October 2007): 406–11. http://dx.doi.org/10.1614/ws-06-147.1.

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Inconsistent control of barnyardgrass with bispyribac may be alleviated through adjuvant technology. Experiments were conducted to determine the effect of adjuvant and urea ammonium nitrate (UAN) on absorption and translocation of bispyribac in barnyardgrass. Additional experiments were conducted to determine when maximum absorption and translocation occurred with the use of a methylated seed oil/organosilicone adjuvant (MSO/OSL) plus UAN (0.37 L ha−1 and 2% v/v). In the initial experiment, 14C-bispyribac–treated leaves, nontreated leaves, and roots were collected 6 and 24 h after application.

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Mączyńska, Agnieszka, Mariola Głazek, and Barbara Krzyzińska. "Effect of foliar fertilizer and fungicidal protection against leaf spot diseases on winter wheat." Acta Agrobotanica 58, no. 1 (2012): 51–58. http://dx.doi.org/10.5586/aa.2005.008.

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Field experiments were carried out in the seasons 2000/2001 and 2001/2002 in Plant Protection Institute, Sooenicowice Branch to assess the influence of foliar fertilizers such as Ekolist PK 1, Ekolist Mg, Mikrosol Z and Urea on healthiness of winter wheat. Foliar fertilizers were mixed with fungicides. The fungicides were applied at full or half recommended doses. The effect of the disease on wheat leaves was evaluated three times in each vegetation season. Remaining green leaf area (GLA) of leaves was also determined. GLA of the leaves F-1 was not significantly different for each combination

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Liu, Guangzhou, Yunshan Yang, Wanmao Liu, Xiaoxia Guo, Jun Xue, Ruizhi Xie, Bo Ming, Keru Wang, Peng Hou, and Shaokun Li. "Leaf Removal Affects Maize Morphology and Grain Yield." Agronomy 10, no. 2 (February 13, 2020): 269. http://dx.doi.org/10.3390/agronomy10020269.

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Increasing planting density is an important practice associated with increases in maize yield, but densely planted maize can suffer from poor light conditions. In our two-year field experiments, two morphologically different cultivars, ZD958 (less compact) and DH618 (more compact), were planted at 120,000 plants ha−1 and 135,000 plants ha−1, respectively. We established different leaf area index (LAI) treatments by removing leaves three days after silking: (1) control, no leaves removed (D0); (2) the two uppermost leaves removed (D1); (3) the four uppermost leaves removed (D2); (4) the leaves

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Fu, Wei, Xingyuan He, Sheng Xu, Wei Chen, Yan Li, Bo Li, Lili Su, and Qin Ping. "Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O3 concentration in urban area." PeerJ 6 (March 5, 2018): e4453. http://dx.doi.org/10.7717/peerj.4453.

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Ground-level ozone (O3) pollution has been widely concerned in the world, particularly in the cities of Asia, including China. Elevated O3 concentrations have potentially influenced growth and nutrient cycling of trees in urban forest. The decomposition characteristics of urban tree litters under O3 exposure are still poorly known. Ginkgo biloba is commonly planted in the cities of northern China and is one of the main tree species in the urban forest of Shenyang, where concentrations of ground-level O3 are very high in summer. Here, we hypothesized that O3 exposure at high concentrations woul

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Camlin, Theodore E. "UPLAND/INLAND SPILL RESPONSE: USE OF UNDERFLOW DAMS." International Oil Spill Conference Proceedings 2001, no. 2 (March 1, 2001): 1381–89. http://dx.doi.org/10.7901/2169-3358-2001-2-1381.

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ABSTRACT On December 20, 1999 at approximately 1045 hours, crude oil was discovered in the Leaf River near Collins, Mississippi. The investigation determined the discharge was approximately 8,000 barrels originating from a source in the vicinity of State Highway 28 and Summerland Road, Jones County, Mississippi. The point of the release was located inland and in an upland type environment approximately 8 miles from the discovery location (Highway 84 bridge) near Collins, Mississippi. After the line was shut-in and control of the source was certain, it was determined there were three distinct t

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Delhomez, Nathalie, Odile Carisse, Michel Lareau, and Shahrokh Khanizadeh. "Susceptibility of Strawberry Cultivars and Advanced Selections to Leaf Spot Caused by Mycosphaerella fragariae." HortScience 30, no. 3 (June 1995): 592–95. http://dx.doi.org/10.21273/hortsci.30.3.592.

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Seventeen strawberry (Fragaria ×ananassa Duchesne) cultivars and six selections were tested under greenhouse conditions for susceptibility to leaf spot induced by Mycosphaerella fragariae (Tul.) Lindau. The level of susceptibility was evaluated based on maximum disease severity and area under the disease progress curve (AUDPC). The 23 genotypes were ranked based on AUDPC and grouped according to their susceptibility. Cluster analysis for AUDPC gave four groups corresponding to low, moderate, high, and very high susceptibility to leaf spot. `Annapolis', `Chambly', `Glooscap', `Redcoat', and `Ve

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Xue, A. G., J. C. Sutton, A. Dale, and J. A. Sullivan. "Differences in virulence of Diplocarpon earlianum isolates on selected strawberry cultivars." Phytoprotection 77, no. 3 (April 12, 2005): 113–18. http://dx.doi.org/10.7202/706107ar.

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Eight isolates of Diplocarpon earlianum were evaluated for virulence, measured as the ability to produce percent leaf area with symptoms (LAS), on 18 cultivars of strawberry (Fragaria x ananassa). Significant differences were observed from isolate and cultivar effects, and isolate x cultivar interaction. Four of the eight isolates, on the average of 18 strawberry cultivars, had LAS ranging from 6.7-9.6%, and were classified as a group of low virulence. The remaining four isolates had LAS ranging from 25.9-45.8% and formed a high virulence group. Of the cultivars tested, 'Vibrant' was resistant

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Zhou, Chang Wei, and Xing Yuan He. "Urban Forests Carbon Storage and Sequestration Benefits in Changchun City, Based on i-Tree Model." Advanced Materials Research 573-574 (October 2012): 471–74. http://dx.doi.org/10.4028/www.scientific.net/amr.573-574.471.

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The study area and plant 928786 trees, of which the most enjoy trees, accounting for about 45.6% of the total number of trees in the city. Eight of the region in the study area covered 2.7-7.9% of trees. Salix matsudana, Populus pseudo-simonii, Pinus sylvestnis var. mongolica Litv, Pinus tabulaeformis var.mukdensis Uyeki and Prunus persica f. rubro-plena is the most important species, they represent 32.2% of the number of all the trees, leaves area of 50.6% and 43.1% of the leaf biomass. The city a lot of trees concentrated in diameter at breast height 15.3-38.1 cm. In general, the tree is you

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Combe, Laurette. "Nouvelle méthode de suivi au champ de la sénescence des feuilles de maïs." Canadian Journal of Botany 83, no. 8 (August 1, 2005): 941–53. http://dx.doi.org/10.1139/b05-043.

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A new method was developed to describe and quantify leaf senescence in a field-grown maize canopy with the purpose of future crop modelling. Leaf shape was analysed using the outlines of over 500 adult leaves from plants grown under diverse culture conditions. Leaf width (λ) taken at regular distances from the ligule (L) allowed the development of leaf-shape equations. These are third-degree polynomials. Thus, four leaf measurements are needed for characterizing leaf shape: maximum width (λm), total length (Lt), width at ligule level (λo), and distance from ligule to the point of maximum width

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Ávila, Crébio José, and José Roberto Postali Parra. "Leaf consumption by Diabrotica speciosa (Coleoptera: Chrysomelidade) adults on difFerent host plants." Scientia Agricola 60, no. 4 (December 2003): 789–92. http://dx.doi.org/10.1590/s0103-90162003000400028.

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Studies related to the feeding behavior of pest insects provide information that will aid the development of control tactics. Leaf consumption by Diabrotica speciosa adults fed on bean, corn, potato and soybean was determined in the laboratory under free-choice (multiple or double-choice) and no-choice (confinement) conditions. In the multiple-choice tests leaf circles were randomly arranged in a circular pattern (arena) inside Petri dishes. The degree of preference for the hosts was determined under double-choice conditions, where common bean was considered the standard host and the remaining

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Fournioux, Jean-Claude. "Demonstration and study of characters of foliar « compensatory growth» phenomenon in grapevine (Vitis vinifera L.)." OENO One 30, no. 2 (June 30, 1996): 53. http://dx.doi.org/10.20870/oeno-one.1996.30.2.1109.

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<p style="text-align: justify;">Defoliation and decapitation experiments showed that the growth of a grapevine leaf was inhibited by both the terminal bud and the younger higher leaves. There is a phenomenon of synergy between these two influences. A young leaf freed of these two influences showed a higher growth rate than the norm ; this is « compensatory growth ». It is when a leaf is in its phase of maximal growth that it is most able to realize this &amp;laquo compensatory growth ». This is not due to a longer growth time, but more to a faster growth rate. This « compensatory gro

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Ali, Shahid, B. B. Kumar, C. M. Kalleshwara Swamy, M. S. Kadian, and B. V. Ramakrishna. "Studies on feasibility of sustainable quality seed potato production technology and development of supply chain for the benefit of small and marginal potato growers of Karnataka." Journal of Horticultural Sciences 13, no. 1 (June 30, 2018): 72–81. http://dx.doi.org/10.24154/jhs.2018.v13i01.008.

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Management of aphid vectors in potato is important for the production of quality seed potato. Aphids are the major vectors of many potato viruses which transmit viral diseases limiting the seed potato production. To explore the area with aphid free/low population a weekly aphid observation was made in major potato growing areas of Chikkaballapur and Chickmagalur districts during rabiand kharif seasons to assess the build-up trends on the standing crop using aphid-leaf count and catches of yellow water pan and yellow sticky traps. Aphid population was below threshold level in the areas surveyed

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Portillo-Estrada, Miguel, Mari Pihlatie, Janne F. J. Korhonen, Janne Levula, Arnoud K. F. Frumau, Andreas Ibrom, Jonas J. Lembrechts, et al. "Climatic controls on leaf litter decomposition across European forests and grasslands revealed by reciprocal litter transplantation experiments." Biogeosciences 13, no. 5 (March 16, 2016): 1621–33. http://dx.doi.org/10.5194/bg-13-1621-2016.

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Abstract. Carbon (C) and nitrogen (N) cycling under future climate change is associated with large uncertainties in litter decomposition and the turnover of soil C and N. In addition, future conditions (especially altered precipitation regimes and warming) are expected to result in changes in vegetation composition, and accordingly in litter species and chemical composition, but it is unclear how such changes could potentially alter litter decomposition. Litter transplantation experiments were carried out across six European sites (four forests and two grasslands) spanning a large geographical

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LIN, Kuan-Hung, Chun-Wei WU, and Yu-Sen CHANG. "Applying Dickson Quality Index, Chlorophyll Fluorescence, and Leaf Area Index for Assessing Plant Quality of Pentas lanceolata." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 47, no. 1 (October 20, 2018): 169–76. http://dx.doi.org/10.15835/nbha47111312.

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Plant quality greatly relates to the seedling vigor (SV), survival and growth of plants after transplantation. The objective of this study was to use the nondestructive measurements of chlorophyll fluorescence (ChlF) and leaf area index (LAI) as SV indices for star cluster (Pentas lanceolata). Plants were grown in potting soil under nature sunlight for 90 d. A total of 13 morphological and physiological parameters were selected for measurements. Among them, root growth potential (RGP) was the best predictor for SV in all tested plants. Plants were separated into 5 RGP groups based on the numbe

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Portillo-Estrada, M., M. Pihlatie, J. F. J. Korhonen, J. Levula, A. K. F. Frumau, A. Ibrom, J. J. Lembrechts, et al. "Biological and climatic controls on leaf litter decomposition across European forests and grasslands revealed by reciprocal litter transplantation experiments." Biogeosciences Discussions 12, no. 21 (November 11, 2015): 18053–84. http://dx.doi.org/10.5194/bgd-12-18053-2015.

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Abstract. Projection of carbon and nitrogen cycles to future climates is associated with large uncertainties, in particular due to uncertainties how changes in climate alter soil turnover, including litter decomposition. In addition, future conditions are expected to result in changes in vegetation composition, and accordingly in litter type and quality, but it is unclear how such changes could potentially alter litter decomposition. Litter transplantation experiments were carried out across 6 European sites (4 forest and 2 grasslands) spanning a large geographical and climatic gradient (5.6–1

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Jett, Lewis W., and T. P. Talbot. "GROWTH CHARACTERISTICS OF `BEAUREGARD' AND `DARBY' SWEETPOTATO." HortScience 31, no. 5 (September 1996): 759d—759. http://dx.doi.org/10.21273/hortsci.31.5.759d.

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`Beauregard' and `Darby' sweetpotato cultivars were developed and released by the Louisiana Agricultural Experiment Station in 1987 and 1994, respectively. In total acreage, `Beauregard' is the dominant cultivar of sweetpotato grown in Louisiana and the remaining United States. However, very little is known about the growth characteristics of these two cultivars. Therefore, the objectives of this research were to examine storage root and shoot growth. Uniform transplants of both cultivars were transplanted in mid-July 1995 at the LSU Sweet Potato Research Station and sequentially harvested biw

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Pinkard, E. A., and C. L. Beadle. "Aboveground biomass partitioning and crown architecture of Eucalyptus nitens following green pruning." Canadian Journal of Forest Research 28, no. 9 (September 1, 1998): 1419–28. http://dx.doi.org/10.1139/x98-119.

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The effects of green pruning on aboveground biomass partitioning and crown architecture were explored in a 3-year-old Eucalyptus nitens (Deane and Maiden) Maiden plantation. Responses were measured in five height zones and three foliage age classes over a 20-month period following removal of 0, 50, or 70% of the green crown length. Development of foliage in the upper crowns of 50%-pruned trees was faster and total leaf area at the end of the experiment was greater than in unpruned trees. Leaf area development of 70%-pruned trees was similar to that of unpruned trees. Larger apical leaves, with

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Sharma, Y., and S. Sharma. "Effect of sowing dates on genetic components in six-rowed barley." Acta Agronomica Hungarica 56, no. 3 (September 1, 2008): 349–56. http://dx.doi.org/10.1556/aagr.56.2008.3.11.

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The genetics of yield and related traits was studied in barley ( Hordeum vulgare L.) by means of 10 × 10 half-diallel progenies (F 1 and F 2 ) at three sowing dates. An additive-dominance model fitted only for flag leaf area, spike length and 1000-grain weight at different sowing dates. Both additive (D) and dominance components (H 1 and H 2 ) were significant for all the traits studied, indicating the preponderance of dominance components in controlling the inheritance for these traits. The value of (H 1 /D) 1/2 indicated over-dominance for all the traits except for flag leaf area. Values of

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Mutisya, J. M., J. A. Sullivan, J. C. Sutton, J. Zheng, and S. Couling. "Influence of leaf scorch on vegetative growth and yield of three strawberry (Fragaria × ananassa Duch.) cultivars with differing levels of resistance." Canadian Journal of Plant Science 85, no. 3 (July 1, 2005): 679–86. http://dx.doi.org/10.4141/p04-122.

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Three strawberry cultivars, Kent, Jewel and Blomidon, were evaluated for their reaction to leaf scorch (Diplocarpon earlianum) disease. The three cultivars are considered to be susceptible, moderately resistant and resistant to leaf scorch, respectively. Plants were grown in the field in a runnerless culture system and inoculated with conidial suspensions at one of five concentrations to generate a range of disease severities. The control plants were not innoculated. Disease severity was monitored during the establishment year and these data were used to calculate area under the disease progre

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Pande, S., and J. Narayana Rao. "Resistance of Wild Arachis Species to Late Leaf Spot and Rust in Greenhouse Trials." Plant Disease 85, no. 8 (August 2001): 851–55. http://dx.doi.org/10.1094/pdis.2001.85.8.851.

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Seventy-four accessions of wild Arachis species along with a susceptible line TMV 2 belonging to A. hypogaea were evaluated for resistance to late leaf spot and rust under greenhouse environment. The experiment was conducted twice to confirm the resistance of the accessions. Percentage of leaf area damaged and disease score on a 1 to 9 scale for late leaf spot and rust were recorded for all accessions in both experiments. Additionally, percentage of defoliation was recorded for late leaf spot. One accession, ICG 8190, of A. hoehnei and one accession, ICG 13199, of A. duranensis were asymptomat

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Bell, M. "The effect of foliage pathogens on growth of peanuts (Arachis hypogaea L.) in tropical Northern Australia." Australian Journal of Agricultural Research 37, no. 1 (1986): 31. http://dx.doi.org/10.1071/ar9860031.

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The effect of foliage pathogens on growth and development and final yield of Virginia Bunch peanuts was assessed under tropical wet season conditions in the Ord River Irrigation Area. Applications of the fungicides chlorothalonil and benomyl were used to manipulate onset and severity of disease during the season. Heavy disease pressure in unprotected plots caused severe defoliation and a 30% reduction in commercial yield. This yield reduction, associated with significantly lower pod numbers, was probably due to defoliation causing reduced interception of incident photosynthetically active radi

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Rodríguez, Diego, Laura Vega, Ángel Murillo, and Eduardo Peralta. "Pathogenic variability of Pseudocercospora griseola isolates from two provinces of Ecuador." Journal of Agriculture of the University of Puerto Rico 101, no. 1 (January 31, 2017): 107–19. http://dx.doi.org/10.46429/jaupr.v101i1.14297.

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Common bean (Phaseolus vulgaris L.) is the most important edible grain legume in Ecuador. The Ministry of Agriculture, Cattle Raising, Aquaculture and Fisheries of this country estimated that 71,600 hectares were cultivated in 2012; of the sown area, 53% was dedicated to dry grain and the remaining 47% to fresh grain. Beans are an important source of income for farmers and food for thousands of Ecuadorian families. Crop performance and yield are affected by diseases such as angular leaf spot caused by Pseudocercospora griseola (Sacc.) Ferraris. The best alternative for disease control is to us

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Nijman, Vincent, and S. (Bas) van Balen. "A faunal survey of the Dieng Mountains, Central Java, Indonesia: distribution and conservation of endemic primate taxa." Oryx 32, no. 2 (April 1998): 145–56. http://dx.doi.org/10.1046/j.1365-3008.1998.d01-24.x.

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A faunal survey was conducted in May–September 1994 and June–July 1995 in the Dieng Mountains, one of the last remaining larger patches of forest in CentralJava province, Indonesia. All three primate species endemic to the Javan faunal region – Javan gibbon Hylobates moloch, grizzled leaf monkey Presbytis comata and ebony leaf monkey Trachypithecus auratus – were found to be present. Hylobates moloch occurs only in the lowland and hill forests in the western part of the study area, while the other two species were found throughout the area from lowland to montane forests. Although more researc

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Viedma, Olga, Danilo R. A. Almeida, and Jose Manuel Moreno. "Postfire Tree Structure from High-Resolution LiDAR and RBR Sentinel 2A Fire Severity Metrics in a Pinus halepensis-Dominated Burned Stand." Remote Sensing 12, no. 21 (October 30, 2020): 3554. http://dx.doi.org/10.3390/rs12213554.

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Tree and plant structures remaining after fires reflect well their degree of consumption, and are therefore good indicators of fire severity. Satellite optical images are commonly used to estimate fire severity. However, depending on the severity of a fire, these sensors have a limited ability to penetrate the canopy down to the ground. Airborne light detection and ranging (LiDAR) can overcome this limitation. Assessing the differences between areas that have been burned in different fire severities based on satellite images of plant and tree structures remaining after fires is important, give

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Grier, Charles C. "Foliage loss due to snow, wind, and winter drying damage: its effects on leaf biomass of some western conifer forests." Canadian Journal of Forest Research 18, no. 9 (September 1, 1988): 1097–102. http://dx.doi.org/10.1139/x88-168.

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Damage to forest canopies by wind, snow, or winter desiccation significantly reduced stand leaf biomass and area below "steady-state" levels in several western coniferous forests. Leaf biomass of 12 different western conifer forests sampled for an average of 4 years was reduced by as much as 36.3, 34.5, and 42.2% by single wind damage, snow breakage, or winter desiccation events, respectively, during the sampling interval. Foliage loss exceeded annual foliage production as estimated from leaf litterfall in about half the stands where damage occurred. Production efficiency (Mg dry matter•ha−1•y

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Thomas, Andrew L., Jackie L. Harris, Elijah A. Bergmeier, and R. Keith Striegler. "Establishment Technique and Rootstock Impact ‘Chambourcin’ Grapevine Morphology and Production in Missouri." HortTechnology 27, no. 2 (April 2017): 248–56. http://dx.doi.org/10.21273/horttech03610-16.

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An evaluation of establishment techniques and rootstocks for ‘Chambourcin’ hybrid grape (Vitis sp.) was conducted 2009–12. Our objective was to evaluate four establishment methods and their interactions with grafted and ungrafted vines in terms of vine morphology and early fruit production under southwest Missouri conditions. The study was established in May 2009, as a factorial experiment comparing four establishment methods (open-trained without protection—two shoots, grow tube protected—two shoots, paperboard carton protected—two shoots, and fan-trained without protection—six shoots) across

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Pompelli, MF, SCV Martins, EF Celin, MC Ventrella, and FM DaMatta. "What is the influence of ordinary epidermal cells and stomata on the leaf plasticity of coffee plants grown under full-sun and shady conditions?" Brazilian Journal of Biology 70, no. 4 (November 2010): 1083–88. http://dx.doi.org/10.1590/s1519-69842010000500025.

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Stomata are crucial in land plant productivity and survival. In general, with lower irradiance, stomatal and epidermal cell frequency per unit leaf area decreases, whereas guard-cell length or width increases. Nevertheless, the stomatal index is accepted as remaining constant. The aim of this paper to study the influence of ordinary epidermal cells and stomata on leaf plasticity and the influence of these characteristics on stomata density, index, and sizes, in the total number of stomata, as well as the detailed distribution of stomata on a leaf blade. As a result, a highly significant positi

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Xue, A. G., and T. D. Warkentin. "Partial resistance to Mycosphaerella pinodes in field pea." Canadian Journal of Plant Science 81, no. 3 (July 1, 2001): 535–40. http://dx.doi.org/10.4141/p00-103.

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The responses of 335 field pea lines originating from more than 30 countries to mycosphaerella blight caused by Mycosphaerella pinodes were evaluated in inoculated field plots in 1994 and 1995. Seven lines (Baccara, Carneval, Danto, Majoret, Miko, PI273605, and Yellowhead) with low area under the disease progress curve (AUDPC) scores were identified. These seven lines, along with the resistant check, Radley, and the susceptible check, 89–195, were further examined for components of partial resistance to the disease in 1996 and 1998. Components evaluated were leaf area with symptoms (LAS), stem

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Page, D. S., E. S. Gilfillan, J. C. Foster, J. R. Hotham, and L. Gonzalez. "MANGROVE LEAF TISSUE SODIUM AND POTASSIUM ION CONCENTRATIONS AS SUBLETHAL INDICATORS OF OIL STRESS IN MANGROVE TREES." International Oil Spill Conference Proceedings 1985, no. 1 (February 1, 1985): 391–93. http://dx.doi.org/10.7901/2169-3358-1985-1-391.

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ABSTRACT As part of an ongoing study of the long-term effects of the Zoe Colocotroni oil spill of March 17, 1973, in Bahia Sucia, Puerto Rico, the effects of the remaining oil on the red mangrove trees in the impact area were investigated. This study involved four sampling trips to the spill site and a reference area outside the spill zone between April 1979 and April 1981. The present study was based on the observation that stressed mangrove trees in the heavily oil-affected areas had a similar appearance to trees exhibiting stress due to hypersalinity in unoiled areas. The working hypothesis

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Cheng, Lailiang, Guohai Xia, and Terry Bates. "Growth and Fruiting of Young `Concord' Grapevines in Relation to Reserve Nitrogen and Carbohydrates." Journal of the American Society for Horticultural Science 129, no. 5 (September 2004): 660–66. http://dx.doi.org/10.21273/jashs.129.5.0660.

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One-year-old `Concord' grapevines (Vitis labruscana Bailey) were fertigated with 0, 5, 10, 15, or 20 mm nitrogen by using a modified Hoagland's solution for 8 weeks during active vine growth in summer. Half of the vines at each N concentration were sprayed with 3% foliar urea twice in late September while the rest served as controls. After natural leaf fall, all the vines were overwintered in a cold room (2 to 4 °C). Four vines from each treatment were destructively sampled before budbreak for reserve N and carbohydrate analysis. The remaining vines were supplied with either no N or sufficient

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Berbec, A., and D. Laskowska. "Investigations of IsogenomicAlloplasmics of Flue-Cured Tobacco Nicotianatabacum cv. Wislica." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 21, no. 5 (April 1, 2005): 259–63. http://dx.doi.org/10.2478/cttr-2013-0791.

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AbstractCytoplasms of fifteen wild Nicotianae and a male sterile cytoplasm (cms) from N. tabacum were bred into the genome of a standard Polish flue-cured cultivar Wislica. The sixteen iso-genomic alloplasmics were compared for expression of male sterility and for some traits related to field performance. In cmsN. bigelovii, N. debneyi, N. exigua, N. megalosiphonor N. suaveolens stamens were absent, in cmsN. tabacum, N. glauca, N. goodspeedii or N. undulata stamens were absent or rudimentary, in cmsN. eastii, N. glutinosa or N. plumbaginifoliastamen tissue became petaloid, in those from N. kni

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Silva, Antônio Veimar da, Carla Michelle da Silva, Caio Nunes Gonçalves, Manoel Cícero de Oliveira Filho, Caike de Sousa Pereira, Maria Jany Kátia Loiola Andrade, and Wagner Rogério Leocádio Soares Pessoa. "Productive potential of watermelon under different plant spacings in the semi-arid region of Brazil." Australian Journal of Crop Science, no. 15(02):2021 (February 3, 2021): 238–43. http://dx.doi.org/10.21475/ajcs.21.15.02.p2796.

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This study aimed to evaluate the growth and development of watermelon plants under different plant spacings in the Semi-arid region of Brazil. A randomized block experimental design was used with four treatments and eight replications. Data were submitted to analysis of variance and the Tukey test. The treatments were composed by the following spacings: T1: 3.0 x 0.8 m; T2: 3.0 x 0.6 m; T3: 2.0 x 0.8 m and T4: 2.0 x 0.6 m (spacings between rows and between plants, respectively). The plant length, number of leaves, stem diameter, leaf area, number of flowers, number of fruits per plant, average

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RIGHI, CIRO ABBUD, VINCENT COUDERC, CARLOS RODRIGUES PEREIRA, and HILTON THADEU ZARATE COUTO. "RESPONSES OF EUCALYPTUS CAMALDULENSIS SPROUTS TO SHADE: AN EVALUATION OF CANOPY PLASTICITY." Experimental Agriculture 52, no. 3 (June 16, 2015): 346–58. http://dx.doi.org/10.1017/s0014479715000137.

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SUMMARYEucalyptus spp. is the main tree used in cellulose production worldwide, cultivated mostly in extensive monocrop plantations. However, due to concerns on environmental impacts, fear on decrease of food production related to the size of cultivated area, its location near human settlements with few jobs generation, eucalypt cultivation is no longer encouraged in many places. At the same time, large plantations hold the opportunity to integrate eucalypt into agroforestry systems (AFS) in a variety of production systems with many social, economical and environmental advantages. In this stud

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