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Journal articles on the topic 'Hydraulic conductance'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Toca, Andrei, Pedro Villar-Salvador, Juan A. Oliet, and Douglass F. Jacobs. "Normalization criteria determine the interpretation of nitrogen effects on the root hydraulics of pine seedlings." Tree Physiology 40, no. 10 (2020): 1381–91. http://dx.doi.org/10.1093/treephys/tpaa068.

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Abstract Plant hydraulics is key for plant survival and growth because it is linked to gas exchange and drought resistance. Although the environment influences plant hydraulics, there is no clear consensus on the effect of nitrogen (N) supply, which may be, in part, due to different hydraulic conductance normalization criteria and studied species. The objective of this study was to compare the variation of root hydraulic properties using several normalization criteria in four pine species in response to three contrasting N fertilization regimes. We studied four closely related, yet ecologicall

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2

Calkin, Howard W., Arthur C. Gibson, and Park S. Nobel. "Xylem water potentials and hydraulic conductances in eight species of ferns." Canadian Journal of Botany 63, no. 3 (1985): 632–37. http://dx.doi.org/10.1139/b85-079.

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Water potentials, flow rates, and anatomy of xylary elements were studied in eight species of ferns to assess the physical constraints that xylem structure presents to water flow. Comparisons were made among ferns of different leaf morphology as well as between a fern with vessels and ferns with tracheids only. Hydraulic conductance was measured by forcing a solution through excised plant segments. These hydraulic conductances were in close agreement with conductances calculated from water potential gradients and flows measured in intact plants. In three species, backflushing excised segments

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3

Nguyen, Thuy Huu, Matthias Langensiepen, Jan Vanderborght, Hubert Hüging, Cho Miltin Mboh, and Frank Ewert. "Comparison of root water uptake models in simulating CO<sub>2</sub> and H<sub>2</sub>O fluxes and growth of wheat." Hydrology and Earth System Sciences 24, no. 10 (2020): 4943–69. http://dx.doi.org/10.5194/hess-24-4943-2020.

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Abstract. Stomatal regulation and whole plant hydraulic signaling affect water fluxes and stress in plants. Land surface models and crop models use a coupled photosynthesis–stomatal conductance modeling approach. Those models estimate the effect of soil water stress on stomatal conductance directly from soil water content or soil hydraulic potential without explicit representation of hydraulic signals between the soil and stomata. In order to explicitly represent stomatal regulation by soil water status as a function of the hydraulic signal and its relation to the whole plant hydraulic conduct

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4

Hacke, U. G. "Variable plant hydraulic conductance." Tree Physiology 34, no. 2 (2014): 105–8. http://dx.doi.org/10.1093/treephys/tpu007.

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5

Judd, Lesley A., Brian E. Jackson, William C. Fonteno, and Jean-Christophe Domec. "Measuring Root Hydraulic Parameters of Container-grown Herbaceous and Woody Plants Using the Hydraulic Conductance Flow Meter." HortScience 51, no. 2 (2016): 192–96. http://dx.doi.org/10.21273/hortsci.51.2.192.

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Root hydraulic conductance and conductivity are physiological traits describing the ease with which water can move through the belowground vascular system of a plant, and are used as indicators of plant performance and adaptability to a given environment. The ability to measure hydraulic conductance of container-grown herbaceous and semiwoody plants with soft conductive tissue was tested using a hydraulic conductance flow meter (HCFM). Although the HCFM is a hydraulic apparatus that has been used on woody plants to measure hydraulic conductance of intact roots, it has never been reportedly use

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6

Choudhary, Sunita, and Thomas R. Sinclair. "Hydraulic conductance differences among sorghum genotypes to explain variation in restricted transpiration rates." Functional Plant Biology 41, no. 3 (2014): 270. http://dx.doi.org/10.1071/fp13246.

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Sorghum (Sorghum bicolor L.) is an important crop for production in dryland regions of the globe. Traits identified in many sorghum lines that apparently make them adapted for dryland conditions are restricted transpiration rate both early in the soil drying cycle and under high atmospheric vapour pressure deficit. It was hypothesised that these responses could be a result of differences in hydraulic conductance of the plants: those with low hydraulic conductance would be more likely to express restricted transpiration rates. The location of the lower hydraulic conductance in the plant could a

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7

Aasamaa, Krõõt, and Anu Sõber. "Light sensitivity of shoot hydraulic conductance in five temperate deciduous tree species." Functional Plant Biology 39, no. 8 (2012): 661. http://dx.doi.org/10.1071/fp12047.

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The light sensitivity of the shoot hydraulic conductance in five temperate deciduous tree species was measured using two methods to clarify the role of light sensitivity and the suitability of the methods used to study it. The light sensitivity measured using a method that included an interruption of ≤10 min in shoot light acclimation did not differ from that measured using a method with continuous illumination. The ‘noncontinuous light’ methods are suitable for measuring hydraulic conductance and its light response. Light sensitivity correlated with other leaf water traits as follows: positiv

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8

Saliendra, NZ, and FC Meinzer. "Relationship Between Root/Soil Hydraulic Properties and Stomatal Behaviour in Sugarcane." Functional Plant Biology 16, no. 3 (1989): 241. http://dx.doi.org/10.1071/pp9890241.

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Stomatal conductance, leaf and soil water status, transpiration, and apparent root hydraulic conductance were measured during soil drying cycles for three sugarcane cultivars growing in containers in a greenhouse. At high soil moisture, transpiration and apparent root hydraulic conductance differed considerably among cultivars and were positively correlated, whereas leaf water potential was similar among cultivars. In drying soil, stomatal and apparent root hydraulic conductance approached zero over a narrow (0.1 MPa) range of soil water suction. Leaf water potential remained nearly constant d

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9

Schulte, Paul J., and Arthur C. Gibson. "Hydraulic conductance and tracheid anatomy in six species of extant seed plants." Canadian Journal of Botany 66, no. 6 (1988): 1073–79. http://dx.doi.org/10.1139/b88-153.

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Hydraulic conductance of tracheids was studied in either petioles or young stems of six species of seed plants having various types of intertracheid pitting. Measured conductances were compared with estimates based on Hagen–Poiseuille flow through ideal capillaries and with predictions from a biophysical model incorporating observed anatomical characteristics of tracheids and intertracheid pits. Conductance of the xylem, expressed as a percentage of the ideal capillary flow prediction, varied from an average of 88% for a species containing only very narrow tracheids to less than 35% for specie

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10

Meinzer, FC, DA Grantz, and B. Smit. "Root Signals Mediate Coordination of Stomatal and Hydraulic Conductance in Growing Sugarcane." Functional Plant Biology 18, no. 4 (1991): 329. http://dx.doi.org/10.1071/pp9910329.

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Root hydraulic conductance and total stomatal conductance on a per plant basis changed in parallel during growth of sugarcane. Changes in root system water and solute transport properties were evaluated to determine the role of changes in root xylem sap composition in this coordination of vapour and liquid phase conductances. Stomatal conductance of excised leaf strips supplied with root exudate declined with increasing leaf area of the exudate donor plants. Leaf strips from plants of different sizes responded similarly to exudate from each donor plant, indicating that there were no inherent d

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11

Sangsing, Krissada, Hervé Cochard, Poonpipope Kasemsap, et al. "Is growth performance in rubber (Hevea brasiliensis) clones related to xylem hydraulic efficiency?" Canadian Journal of Botany 82, no. 7 (2004): 886–91. http://dx.doi.org/10.1139/b04-083.

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Hydraulic efficiency, xylem pressure, and stomatal conductance were measured in two Hevea clones having contrasting growth performances in their immature phase. Hydraulic efficiency was estimated by the xylem resistance on a leaf area basis on stem, petiole segments, and whole branches. The fast-growing clone exhibited significantly higher xylem efficiency, higher stomatal conductance, and higher xylem pressure. The difference in xylem pressure between the two clones was quantitatively consistent with the differences in hydraulic resistance and leaf transpiration rates. Our results suggest tha

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12

Aasamaa, Krõõt, Anu Sõber, and Märt Rahi. "Leaf anatomical characteristics associated with shoot hydraulic conductance, stomatal conductance and stomatal sensitivity to changes of leaf water status in temperate deciduous trees." Functional Plant Biology 28, no. 8 (2001): 765. http://dx.doi.org/10.1071/pp00157.

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Some anatomical characteristics in leaves relating to hydraulic conductance and stomatal conductance were examined in six temperate deciduous tree species. The fourth power of the radius of the conducting elements in xylem (r4) and the area of mesophyll and epidermal cells per unit length of leaf cross-section (u) were high in leaves with high hydraulic conductance (L). Stomatal conductance (gs) and stomatal sensitivity to an increase in leaf water potential (si) correlated positively with the length of stomatal pore (l), but negatively with the guard cell width (z) and the length of the dorsa

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13

Myers, BA. "The Influence of the Lignotuber on Hydraulic Conductance and Leaf Conductance in Eucalyptus behriana Seedlings." Functional Plant Biology 22, no. 5 (1995): 857. http://dx.doi.org/10.1071/pp9950857.

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Hydraulic conductances of stem segments and stem-plus-lignotuber segments were estimated for 3-year-old seedlings of the mallee eucalypt Eucalyptus behriana F. Muell. Stems of seedlings were cut underwater and either above or below the lignotuber. Cutting the stem of intact seedlings underwater and above the lignotuber resulted in rapid increases in leaf water potential (Ψ); 1.1 MPa in 10-15 min with a concomitant decrease in leaf conductance. Cutting the stem below the lignotuber did not significantly affect leaf Ψ or leaf conductance. Transpirational flow through whole seedlings and segments

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14

Karatassiou, Maria, Panagiota Karaiskou, Eleni Verykouki, and Sophia Rhizopoulou. "Hydraulic Response of Deciduous and Evergreen Broadleaved Shrubs, Grown on Olympus Mountain in Greece, to Vapour Pressure Deficit." Plants 11, no. 8 (2022): 1013. http://dx.doi.org/10.3390/plants11081013.

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In this study, leaf hydraulic functionality of co-occurring evergreen and deciduous shrubs, grown on Olympus Mountain, has been compared. Four evergreen species (Arbutus andrachne, Arbutus unedo, Quercus ilex and Quercus coccifera) and four deciduous species (Carpinus betulus, Cercis siliquastrum, Coronilla emeroides and Pistacia terebinthus) were selected for this study. Predawn and midday leaf water potential, transpiration, stomatal conductance, leaf temperature and leaf hydraulic conductance were estimated during the summer period. The results demonstrate different hydraulic tactics betwee

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15

Jin, Ying, Chuankuan Wang, Zhenghu Zhou, and Zhimin Li. "Co-ordinated performance of leaf hydraulics and economics in 10 Chinese temperate tree species." Functional Plant Biology 43, no. 11 (2016): 1082. http://dx.doi.org/10.1071/fp16097.

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Exploring relationships between leaf hydraulics and economic traits is important in understanding the carbon–water coupling and in extending the leaf economics spectrum. In this study, leaf hydraulics, photosynthesis, structural and nutrient traits and photosynthetic resource use efficiency were measured for 10 temperate tree species in the north-eastern China. Leaf hydraulic conductance was positively correlated with photosynthetic traits, specific leaf area, leaf nitrogen concentration, photosynthetic water and nitrogen use efficiencies, suggesting co-ordination between leaf hydraulics and e

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16

Markhart, Albert H., and Barbara Smit. "Measurement of Root Hydraulic Conductance." HortScience 25, no. 3 (1990): 282–87. http://dx.doi.org/10.21273/hortsci.25.3.282.

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17

Rejšek, K., P. Holčíková, V. Kuráž, et al. "Saturated hydraulic conductance of forest soils affected by track harvesters." Journal of Forest Science 57, No. 8 (2011): 321–39. http://dx.doi.org/10.17221/6/2011-jfs.

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The exact data from the field of soil mechanics from specific forest stands exposed to forestry mechanization operation were obtained. Field surveys were performed on four study plots within the Křtiny Training Forest Enterprise, Masaryk Forest, followed by laboratory analyses of the collected soil samples aimed at evaluation of the impacts of Zetor 7245 Horal System, PONSSE ERGO 16 harvester and Gremo 950 forwarder on the compaction of upper soil horizons as well as on the dynamics of soil saturated hydraulic conductivity. A specific objective of the performed investigation was to assess the

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18

Aasamaa, Krõõt, and Anu Sõber. "Seasonal courses of maximum hydraulic conductance in shoots of six temperate deciduous tree species." Functional Plant Biology 32, no. 12 (2005): 1077. http://dx.doi.org/10.1071/fp05088.

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The seasonal course of maximum hydraulic conductance of leaf laminae (K lamina) of shoots correlated strongly with the seasonal course of the maximum hydraulic conductance of leaf laminae of HgCl2-treated shoots (K lamina(HgCl2)), and with the seasonal course of the difference (dK lamina) between K lamina and K lamina(HgCl2). However, it did not correlate strongly with the seasonal course of the hydraulic conductance of stem and petioles of the shoot (K stpt) in six temperate deciduous tree species. The species ranked according to K lamina as follows: Populus tremula L. > Salix caprea L. &g

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19

Li, Duan, Jianhua Si, Xiaoyou Zhang, et al. "Comparison of Branch Water Relations in Two Riparian Species: Populus euphratica and Tamarix ramosissima." Sustainability 11, no. 19 (2019): 5461. http://dx.doi.org/10.3390/su11195461.

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Water relations in plants maintain healthy tree branches and drought conditions during plant growth may affect water relations, but the mechanisms are poorly known. In our study, we determined the stomatal conductance, hydraulic conductance, water potential and ion concentration of xylem sap to increase the understanding of changes in water relations in branches of Populus euphratica (P. euphratica) and Tamarix ramosissima (T. ramosissima), which are the dominant plant species in the lower reaches of the Heihe River Basin in China. The results showed that both species responded to vapor pressu

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20

Richardson, Freya, Gregory J. Jordan, and Timothy J. Brodribb. "Leaf hydraulic conductance is linked to leaf symmetry in bifacial, amphistomatic leaves of sunflower." Journal of Experimental Botany 71, no. 9 (2020): 2808–16. http://dx.doi.org/10.1093/jxb/eraa035.

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Abstract The hydraulic implications of stomatal positioning across leaf surfaces and the impact on internal water flow through amphistomatic leaves are not currently well understood. Amphistomaty potentially provides hydraulic efficiencies if the majority of hydraulic resistance in the leaf exists outside the xylem in the mesophyll. Such a scenario would mean that the same xylem network could equally supply a hypostomatic or amphistomatic leaf. Here we examine leaves of Helianthus annuus to determine whether amphistomaty in this species is associated with higher hydraulic efficiency compared w

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21

Hernández, María J., Sven Mutke, Fernando Montes, and Pilar Pita. "Early testing for improving growth under water shortage in Eucalyptus globulus Labill." Forest Systems 33, no. 1 (2024): e01. http://dx.doi.org/10.5424/fs/2024331-20868.

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Aim of study: We aimed at identifying differences in the response to water shortage between Eucalyptus globulus clones. Area of study: The greenhouse experiment was performed in SW Spain. Material and methods: Potted plants from six clones were grown in a greenhouse for 53 days under two watering regimes. Two clones were F0 genotypes and the other four were F1 (hybrid) genotypes, including one inbred clone. Differences in stomatal conductance, hydraulic traits, growth and specific leaf area (SLA) were analyzed. Main results: Water shortage decreased SLA, growth in height and

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22

Deng, Jifeng, Longyan Wan, Yanfeng Bao, Minghan Yu, and Qingbin Jia. "Seasonal Variations in Hydraulic Regulation of Whole-Tree Transpiration in Mongolian Pine Plantations: Insights from Semiarid Deserts in Northern China." Forests 15, no. 8 (2024): 1367. http://dx.doi.org/10.3390/f15081367.

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Seasonal precipitation variance significantly alters soil water content, potentially inducing water stress and affecting plant transpiration in semiarid deserts. This study explored the effects of environmental variables and hydraulic conductance on whole-tree transpiration (ET) in Mongolian pines (Pinus sylvestris var. mongolica) across different forest stages in the semiarid deserts of Northern China. We measured ET using sap flow in mature (MMP), half-mature (HMP), and young (YMP) Mongolian pine plantations. Measurements included soil-leaf water potential difference (ΔΨ), atmospheric condit

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Mencuccini, Maurizio, and Jonathan Comstock. "Variability in hydraulic architecture and gas exchange of common bean (Phaseolus vulgaris) cultivars under well-watered conditions: interactions with leaf size." Functional Plant Biology 26, no. 2 (1999): 115. http://dx.doi.org/10.1071/pp98137.

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In a greenhouse study, 12 common bean cultivars from a wide geographical range were compared for their morphological, gas exchange and hydraulic architecture characters. Cultivars bred for cultivation in hot and dry regions had significantly smaller leaves and crowns, but higher stomatal conductances and transpiration rates per unit of leaf area. Short-term variability in gas exchange rates was confirmed using leaf carbon isotope discrimination. A literature survey showed that, although previously unnoticed, the strong inverse coupling between leaf size and gas exchange rates was present in th

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Bauer, Philip, William Pettigrew, and Todd Campbell. "Response of Four Cotton Genotypes to N Fertilization for Root Hydraulic Conductance and Lint Yield." Journal of Cotton Science 18, no. 3 (2014): 362–66. http://dx.doi.org/10.56454/synz2610.

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In controlled environments, hydraulic conductance of cotton (Gossypium hirsutum L.) roots is affected by nitrate supply. Limited information is available on the influence of nitrogen (N) fertilizer application on cotton root hydraulic conductance under field conditions. The objective of this study was to determine if applied N influenced root hydraulic conductance and lint yield of four diverse genotypes under field conditions. Studies were conducted in 2009 and 2010 at Florence, SC and Stoneville MS. Treatments were two applied N fertilizer rates (0 and 112 kg N ha-1) and four genotypes (AGC

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Keller, Markus, Laura S. Deyermond, and Bhaskar R. Bondada. "Plant hydraulic conductance adapts to shoot number but limits shoot vigour in grapevines." Functional Plant Biology 42, no. 4 (2015): 366. http://dx.doi.org/10.1071/fp14206.

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The rate of shoot growth (vigour) in grapevines tends to decrease as the number of shoots per plant increases. Because the underlying causes of this relationship remain unclear, they were studied by variable pruning of field-grown, deficit-irrigated Merlot grapevines (Vitis vinifera L.). Shoot number ranged from 11 to 124 per vine and was inversely correlated with shoot growth rate, leaf appearance rate, axillary bud outgrowth, internode length, leaf size, shoot leaf area, carbon partitioned to the fruit (Cfruit) per shoot, average daily maximum photosynthesis (Amax), stomatal conductance (gma

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Mohamed, Johar, Hazandy A. Hamid, Ahmad A. Nuruddin, and Nik M. N. A. Majid. "Anatomical characteristics of Gigantochloa scortechinii bamboo rhizome in relation with hydraulic conductance." BioResources 14, no. 4 (2019): 9082–99. http://dx.doi.org/10.15376/biores.14.4.9082-9099.

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Structural development and modification of bamboo culm’s anatomical characteristics occur during the maturation period. This process affects the conductivity efficiency in individual bamboo culms (above ground). The present study clarified this process in the sympodial type of bamboo rhizome (belowground). This study aimed to observe the anatomical characteristics of Gigantochloa scortechinii rhizome, examine their relationship with different study sites and rhizome ages, and investigate their relationship with hydraulic conductance. Destructive sampling on four consecutive rhizomes was conduc

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Anderegg, William R. L. "Quantifying seasonal and diurnal variation of stomatal behavior in a hydraulic-based stomatal optimization model." Journal of Plant Hydraulics 5 (December 22, 2018): e001. http://dx.doi.org/10.20870/jph.2018.e001.

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Plant responses to drought occur across many time-scales, with stomatal closure typically considered to be a critical short-term response. Recent theories of optimal stomatal conductance linked to plant hydraulic transport have shown promise, but it is not known if stomata update their hydraulic “shadow price” of water use (marginal increase in carbon cost with a marginal drop in water potential) over days, seasons, or in response to recent drought. Here, I estimate the hydraulic shadow price in five species – two semi-arid gymnosperms, one temperate and two tropical angiosperms – at daily tim

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Bréda, N., H. Cochard, E. Dreyer, and A. Granier. "Water transfer in a mature oak stand (Quercuspetraea): seasonal evolution and effects of a severe drought." Canadian Journal of Forest Research 23, no. 6 (1993): 1136–43. http://dx.doi.org/10.1139/x93-144.

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The reactions of sessile oak (Quercuspetraea (Mattuschka) Liebl.) to drought were studied under natural conditions in a 32-year-old stand near Nancy (northeastern France) during the summers of 1989 (strongly rain deficient) and 1990. A plot of five trees was subjected to imposed water shortage, while a group of irrigated trees was used as a control. Measurements of xylem sap flows and water potential enabled the computation of plot transpiration, canopy conductance, and specific hydraulic conductance in the soil–tree continuum. Stomatal conductance was measured directly with a porometer. Speci

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Trifilò, Patrizia, Maria Assunta Lo Gullo, Fabio Raimondo, Sebastiano Salleo, and Andrea Nardini. "Effects of NaCl addition to the growing medium on plant hydraulics and water relations of tomato." Functional Plant Biology 40, no. 5 (2013): 459. http://dx.doi.org/10.1071/fp12287.

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This work reports on experimental evidence for the role of ion-mediated changes of xylem hydraulic conductivity in the functional response of Solanum lycopersicum L. cv. Naomi to moderate salinity levels. Measurements were performed in fully developed 12-week-old plants grown in half-strength Hoagland solution (control, C-plants) or in the same solution added with 35 mM NaCl (NaCl-plants). NaCl-plants produced a significantly less but heavier leaves and fruits but had similar gas-exchange rates as control plants. Moreover, NaCl-plants showed higher vessel multiple fraction (FVM) than control p

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Aweto, K. E., O. Ohwoghere-Asuma, and T. Omeru. "A comparative aquifer vulnerability study of the Quaternary Sombreiro – Warri Deltaic plain deposits, Western Niger Delta, Nigeria." Ife Journal of Science 25, no. 1 (2023): 069–85. http://dx.doi.org/10.4314/ijs.v25i1.8.

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This paper investigates the effect of two parameters, resistivity and hydraulic conductivity of the vadose zone, and their reliability in assessing aquifer vulnerability. Hence, the vulnerability of the aquifers within the Quaternary – Sombreiro Deltaic deposits to contamination was assessed using two models: longitudinal conductance and hydraulic resistance. The results from the simulation of the models show four vulnerability zones indicated by the longitudinal conductance model, while the hydraulic resistance model revealed five zones. Two-way analysis of variance (ANOVA) reveals that thick

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Wang, Yujie, and Christian Frankenberg. "Technical note: Common ambiguities in plant hydraulics." Biogeosciences 19, no. 19 (2022): 4705–14. http://dx.doi.org/10.5194/bg-19-4705-2022.

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Abstract. Plant hydraulics gains increasing interest in plant ecophysiology and vegetation modeling. However, the hydraulic properties and profiles are often improperly represented, thus leading to biased results and simulations, e.g., the neglection of gravitational pressure drop results in overestimated water flux. We highlight the commonly seen ambiguities and/or misunderstandings in plant hydraulics, including (1) the distinction between water potential and pressure, (2) differences among hydraulic conductance and conductivity, (3) xylem vulnerability curve formulations, (4) model complexi

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Zhao, Xiao-wei, Lei Ouyang, Ping Zhao, and Chun-fang Zhang. "Effects of size and microclimate on whole-tree water use and hydraulic regulation inSchima superbatrees." PeerJ 6 (July 6, 2018): e5164. http://dx.doi.org/10.7717/peerj.5164.

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BackgroundPlant-water relations have been of significant concern in forestry and ecology studies in recent years, yet studies investigating the annual differences in the characteristics of inter-class water consumption in trees are scarce.MethodsWe classified 15 trees from aSchima superbaplantation in subtropical South China into four ranks using diameter at breast height (DBH). The inter-class and whole-tree water use were compared based on three parameters: sap flux density, whole-tree transpiration and canopy transpiration over two years. Inter-class hydraulic parameters, such as leaf water

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Gibson, A. C., H. W. Calkin, D. O. Raphael, and P. S. Nobel. "Water relations and xylem anatomy of ferns." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 86 (1985): 81–92. http://dx.doi.org/10.1017/s0269727000007995.

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SynopsisThe entire soil-plant-atmosphere continuum must be analysed to elucidate how xylem anatomy relates to water flow in plants. Measurements of water potential gradients and volume of water flow per unit time are needed to obtain values of hydraulic conductance per unit length. By comparing values of hydraulic conductance per unit length along the plant, the regions where xylem structure restricts water flow can be determined. Previous studies of fern water relations demonstrated that very large water potential gradients occurring in stipes of certain ferns were closely correlated with red

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Darlington, Alan B., and Michael A. Dixon. "The hydraulic architecture of roses (Rosa hybrida)." Canadian Journal of Botany 69, no. 4 (1991): 702–10. http://dx.doi.org/10.1139/b91-095.

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The presence of an abscission zone in the stem of greenhouse roses (Rosa hybrida) between the vegetative and reproductive components was verified. This led to a description of the hydraulic architecture of the rose stem. The structural aspects of the xylem conducting system in stem, abscission zone and peduncle were examined to define their relative roles in the delivery of water via the stem to the transpiring plant surfaces and the extent to which their functional capacity may be influenced by environmental variables such as humidity. The stem exhibited a highly developed xylem with many lar

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Maurel, Marion, Cécile Robin, Thierry Simonneau, Denis Loustau, Erwin Dreyer, and Marie-Laure Desprez-Loustau. "Stomatal conductance and root-to-shoot signalling in chestnut saplings exposed to Phytophthora cinnamomi or partial soil drying." Functional Plant Biology 31, no. 1 (2004): 41. http://dx.doi.org/10.1071/fp03133.

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The effects of root infection by Phytophthora cinnamomi on stomatal conductance in Castanea sativa L. saplings were investigated to determine the potential role of root-derived chemical signals. A split-root experiment was carried out, in which inoculation of the pathogen or drought was applied to the root systems in either one or both compartments. At the end of the experiment plant sap extracts were collected and their effects on stomatal conductance were determined by leaf bioassay. Inoculation or drought imposed in both compartments resulted in decreases in stomatal conductance (gs), trans

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Sober, A. "Hydraulic conductance, stomatal conductance, and maximal photosynthetic rate in bean leaves." Photosynthetica 34, no. 4 (1998): 599–603. http://dx.doi.org/10.1023/a:1006834119588.

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Scoffoni, Christine, Grace John, Herve Cochard, and Lawren Sack. "Testing for ion-mediated enhancement of the hydraulic conductance of the leaf xylem in diverse angiosperms." Journal of Plant Hydraulics 4 (April 26, 2017): e004. http://dx.doi.org/10.20870/jph.2017.e004.

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Replacing ultra-pure water solution with ion solution closer to the composition of natural xylem sap increases stem hydraulic conductance by up to 58%, likely due to changes in electroviscosity in the pit membrane pores. This effect has been proposed to contribute to the control of plant hydraulic and stomatal conductance and potentially to influence on carbon balance during dehydration. However, this effect has never been directly tested for leaf xylem, which constitutes a major bottleneck in the whole plant. We tested for an ion-mediated increase in the hydraulic conductance of the leaf xyle

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Wang, Yong-Qiang, Ming-Yuan Ni, Wen-Hao Zeng, et al. "Co-ordination between leaf biomechanical resistance and hydraulic safety across 30 sub-tropical woody species." Annals of Botany 128, no. 2 (2021): 183–91. http://dx.doi.org/10.1093/aob/mcab055.

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Abstract Background and Aims Leaf biomechanical resistance protects leaves from biotic and abiotic damage. Previous studies have revealed that enhancing leaf biomechanical resistance is costly for plant species and leads to an increase in leaf drought tolerance. We thus predicted that there is a functional correlation between leaf hydraulic safety and biomechanical characteristics. Methods We measured leaf morphological and anatomical traits, pressure–volume parameters, maximum leaf hydraulic conductance (Kleaf-max), leaf water potential at 50 % loss of hydraulic conductance (P50leaf), leaf hy

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Lauri, Pierre-Éric, Antoine Marceron, Frédéric Normand, Anaëlle Dambreville, and Jean-Luc Regnard. "Soil water deficit decreases xylem conductance efficiency relative to leaf area and mass in the apple." Journal of Plant Hydraulics 1 (April 23, 2014): e003. http://dx.doi.org/10.20870/jph.2014.e003.

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It is generally postulated that at the tree scale a drought-related decrease in hydraulic conductance is balanced by a decrease of leaf area. We hypothesized that, at the individual leaf scale, drought affects the allometry between leaf area or mass and hydraulics, leading to a non-linear relationships between these traits. The study was conducted on well-watered and on water-stressed shoots of several apple genotypes covering an extended range of leaf area. Working on dried leaves, we measured leaf lamina area and mass and analyzed their relationships with the maximal xylem hydraulic conducta

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Bonan, G. B., M. Williams, R. A. Fisher, and K. W. Oleson. "Modeling stomatal conductance in the Earth system: linking leaf water-use efficiency and water transport along the soil-plant-atmosphere continuum." Geoscientific Model Development Discussions 7, no. 3 (2014): 3085–159. http://dx.doi.org/10.5194/gmdd-7-3085-2014.

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Abstract. The empirical Ball–Berry stomatal conductance model is commonly used in Earth system models to simulate biotic regulation of evapotranspiration. However, the dependence of stomatal conductance (gs) on vapor pressure deficit (Ds) and soil moisture must both be empirically parameterized. We evaluated the Ball–Berry model used in the Community Land Model version 4.5 (CLM4.5) and an alternative stomatal conductance model that links leaf gas exchange, plant hydraulic constraints, and the soil–plant–atmosphere continuum (SPA) to numerically optimize photosynthetic carbon gain per unit wate

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Chen, Yapeng, Xingming Hao, and Chenggang Zhu. "Comparative Apparent Hydraulic Conductance, Leaf Gas Exchange, and Water Resource Partitioning of Populus euphratica Trees and Saplings." Forests 13, no. 12 (2022): 1982. http://dx.doi.org/10.3390/f13121982.

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Water acquisition via the root system of woody species is a key factor governing plant physiology. In order to compare the impact of water acquisition on the hydraulic and photosynthetic characteristics of different-sized Populus euphratic, which is a desert riparian tree species, we quantified leaf hydraulic conductance (KL), stomatal conductance (gs), net photosynthetic rate (PN), predawn and midday leaf water potential (Ψ), and the stem δ18O of the saplings and mature trees. The results showed that the saplings had a lower predawn leaf water potential (Ψpd) and soil-to-leaf water potential

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Gibson, Arthur C., Howard W. Calkin, and Park S. Nobel. "Hydraulic Conductance and Xylem Structure in Tracheid-Bearing Plants." IAWA Journal 6, no. 4 (1985): 293–302. http://dx.doi.org/10.1163/22941932-90000957.

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To understand water flow in tracheary elements, hydraulic conductances per unit length were measured and then compared with theoretical values calculated from xylem anatomical measurements using the Hagen -Poiseuille relation for nine species of pteridophytes, including Psilotum and eight species of ferns. In ferns the water potential gradients were essentially constant from the root tips to the distal portion of the leaf rachises, although somewhat larger gradients were found from the petiolule onward. Although tracheid number and diameter apparently controlled water flow in xylem, estimates

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Mohamed, Johar, Hazandy A. Hamid, Ahmad A. Nuruddin, and Nik M. N. A. Majid. "Chemical attributes of Gigantochloa scortechinii bamboo rhizome in relation with hydraulic conductance." BioResources 14, no. 4 (2019): 8155–73. http://dx.doi.org/10.15376/biores.14.4.8155-8173.

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Chemical changes during the maturation period of bamboo are believed to affect its conductance ability. However, prior studies on the bamboo’s chemical changes were inconclusive in implying that the maturation period affects the rhizome’s conductance ability. The rhizome’s conductivity is crucial to rapidly grow a new bamboo sprout. The aim of this study was to determine the variation of chemical attributes among study sites during the maturation period of bamboo rhizome (Gigantochloa scortechinii), and investigate the possibility of a relationship between the chemical attributes and hydraulic

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Liu, Xiaorong, Hui Liu, Sean M. Gleason, et al. "Water transport from stem to stomata: the coordination of hydraulic and gas exchange traits across 33 subtropical woody species." Tree Physiology 39, no. 10 (2019): 1665–74. http://dx.doi.org/10.1093/treephys/tpz076.

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Abstract Coordination between sapwood-specific hydraulic conductivity (Ks) and stomatal conductance (gs) has been identified in previous studies; however, coordination between leaf hydraulic conductance (Kleaf) and gs, as well as between Kleaf and Ks is not always consistent. This suggests that there is a need to improve our understanding of the coordination among hydraulic and gas exchange traits. In this study, hydraulic traits (e.g., Ks and Kleaf) and gas exchange traits, including gs, transpiration (E) and net CO2 assimilation (Aarea), were measured across 33 co-occurring subtropical woody

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Schenk, H. J., K. Mocko, J. M. Michaud, et al. "In situ measurement of plant hydraulic conductance." Acta Horticulturae, no. 1300 (December 2020): 169–78. http://dx.doi.org/10.17660/actahortic.2020.1300.22.

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Tucker, V. L., and V. H. Huxley. "O2 modulation of single-vessel hydraulic conductance." American Journal of Physiology-Heart and Circulatory Physiology 254, no. 2 (1988): H317—H323. http://dx.doi.org/10.1152/ajpheart.1988.254.2.h317.

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To investigate the response of the microvascular endothelial barrier to O2 lack, hydraulic conductivities (Lp) were compared under control and hypoxic conditions. In 29 decerebrate frogs (Rana pipiens) the mesentery was exposed and continuously superfused with room air-equilibrated frog Ringer (14 degrees C, pH 7.4). Single mesenteric microvessels (15- to 50-microm diam) were cannulated and perfused with frog Ringer containing 5-40 mg/ml bovine serum albumin and 5-10% (vol/vol) human erythrocytes. The modified Landis technique was used to measure transmural water flux per unit area (Jv/S) from

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Baldwin, A. L., L. M. Wilson, and B. R. Simon. "Effect of pressure on aortic hydraulic conductance." Arteriosclerosis and Thrombosis: A Journal of Vascular Biology 12, no. 2 (1992): 163–71. http://dx.doi.org/10.1161/01.atv.12.2.163.

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Bolger, T. P., D. R. Upchurch, and B. L. McMichael. "Temperature effects on cotton root hydraulic conductance." Environmental and Experimental Botany 32, no. 1 (1992): 49–54. http://dx.doi.org/10.1016/0098-8472(92)90029-2.

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Esin Koksal, Suheyla, Gokhan Gunduz, and Menderes Kalkat. "Installation of Test Setup and Measurement Procedures in Fir Wood Hydraulic Conductance Measurement." Drvna industrija 72, no. 2 (2021): 111–19. http://dx.doi.org/10.5552/drvind.2021.1945.

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For a hydraulic conductor, through which liquid flows, hydraulic conductance (K, ml·s-1·MPa-1) is defined as the ratio of pressure difference at the inlet and outlet to the fluid amount passing through the hydraulic conductor in a unit time period. This property is one of the key functions of the wood, and is obtained by the flow rate (F – Flow, ml·s-1) along the wood sample divided by the pressure difference driving the flow (DP, MPa). This study aimed to establish a test setup to determine the hydraulic conductance values of Uludağ Fir (Abies bornmulleriana Mattf.). A test setup was establis

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Raimondo, Fabio, Francesco Raudino, Santa Olga Cacciola, Sebastiano Salleo, and Maria Assunta Lo Gullo. "Impairment of leaf hydraulics in young plants of Citrus aurantium (sour orange) infected by Phoma tracheiphila." Functional Plant Biology 34, no. 8 (2007): 720. http://dx.doi.org/10.1071/fp07065.

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Phoma trachephila (Petri) Kantschaveli et Gikachvili causes dieback of several Citrus species. The impact of this fungus on leaf hydraulics was studied in Citrus aurantium L. (sour orange) with the aim of identifying the primary mechanism of damage to leaves. Leaves inoculated with a conidial suspension were measured for conductance to water vapor (gL) and specific hydraulic conductance (Kleaf) every 3 days after inoculation. The earliest symptom of infection consisted of vein chlorosis. Functional vein density (FVD) was monitored and microscopic observations were made of major vein conduits.

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