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Artigos de revistas sobre o tema "Photosynthetic"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Jalal, A. Aliyev, and S. Mirzoyev Rufat. "Photosynthesis and Productivity of Soybean (Glycine max (L.) Merr.]." Journal of Life Sciences and Biomedicine 65, no. 5-6 (2010): 60–70. https://doi.org/10.5281/zenodo.10009872.

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The peculiarities of leaf carbon dioxide gas exchange in soybean genotypes grown in field over a largearea and contrasting in duration of vegetation, photosynthetie traits and productivity were studied.Varietal differences in the daily and ontogenetic changes in photosynthesis and photorespiration wereidentified. It was established that the period of the high activity of photosynthetic apparatus in highproductive soybean genotypes lasts for a longer time. The photosynthetie rate and the rate of CO, re-lease in light due to photorespiration are higher in high productive genotypes. The magnitude

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2

Bai, Yuyu, and John F. Kelly. "A Study of Photosynthetic Activities of Eight Asparagus Genotypes under Field Conditions." Journal of the American Society for Horticultural Science 124, no. 1 (1999): 61–66. http://dx.doi.org/10.21273/jashs.124.1.61.

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Net photosynthesis from whole plants of eight asparagus (Asparagus officinalis L.) genotypes was measured at two locations in an open infrared gas analysis system. Measurements started at about the completion of full fern growth, which occurred at the end of July and lasted through the season until fern senescence in late September. Net photosynthesis of the eight genotypes ranged from 15.67 to 27.79 μmol·m-2·s-1. Significant differences (P < 0.1) in net photosynthesis were found among the eight genotypes. Both yield and specific leaf mass (SLM) were correlated significantly with net photos

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3

Capó-Bauçà, Sebastià, Marcel Font-Carrascosa, Miquel Ribas-Carbó, Andrej Pavlovič, and Jeroni Galmés. "Biochemical and mesophyll diffusional limits to photosynthesis are determined by prey and root nutrient uptake in the carnivorous pitcher plant Nepenthes × ventrata." Annals of Botany 126, no. 1 (2020): 25–37. http://dx.doi.org/10.1093/aob/mcaa041.

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Abstract Background and Aims Carnivorous plants can enhance photosynthetic efficiency in response to prey nutrient uptake, but the underlying mechanisms of increased photosynthesis are largely unknown. Here we investigated photosynthesis in the pitcher plant Nepenthes × ventrata in response to different prey-derived and root mineral nutrition to reveal photosynthetic constrains. Methods Nutrient-stressed plants were irrigated with full inorganic solution or fed with four different insects: wasps, ants, beetles or flies. Full dissection of photosynthetic traits was achieved by means of gas exch

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Zhu, Xin-Guang, Donald R. Ort, Martin A. J. Parry, and Susanne von Caemmerer. "A wish list for synthetic biology in photosynthesis research." Journal of Experimental Botany 71, no. 7 (2020): 2219–25. http://dx.doi.org/10.1093/jxb/eraa075.

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Abstract This perspective summarizes the presentations and discussions at the ‘ International Symposium on Synthetic Biology in Photosynthesis Research’, which was held in Shanghai in 2018. Leveraging the current advanced understanding of photosynthetic systems, the symposium brain-stormed about the redesign and engineering of photosynthetic systems for translational goals and evaluated available new technologies/tools for synthetic biology as well as technological obstacles and new tools that would be needed to overcome them. Four major research areas for redesigning photosynthesis were ident

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Gautam, Harsha, Zebus Sehar, Md Tabish Rehman, Afzal Hussain, Mohamed F. AlAjmi, and Nafees A. Khan. "Nitric Oxide Enhances Photosynthetic Nitrogen and Sulfur-Use Efficiency and Activity of Ascorbate-Glutathione Cycle to Reduce High Temperature Stress-Induced Oxidative Stress in Rice (Oryza sativa L.) Plants." Biomolecules 11, no. 2 (2021): 305. http://dx.doi.org/10.3390/biom11020305.

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The effects of nitric oxide (NO) as 100 µM sodium nitroprusside (SNP, NO donor) on photosynthetic-nitrogen use efficiency (NUE), photosynthetic-sulfur use efficiency (SUE), photosynthesis, growth and agronomic traits of rice (Oryza sativa L.) cultivars, Taipie-309 (high photosynthetic-N and SUE) and Rasi (low photosynthetic-N and SUE) were investigated under high temperature stress (40 °C for 6 h). Plants exposed to high temperature stress caused significant reduction in photosynthetic activity, use efficiency of N and S, and increment in H2O2 and thiobarbituric acid reactive substance (TBARS)

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Man, Rongzhou, and Victor J. Lieffers. "Seasonal variations of photosynthetic capacities of white spruce (Picea glauca) and jack pine (Pinus banksiana) saplings." Canadian Journal of Botany 75, no. 10 (1997): 1766–71. http://dx.doi.org/10.1139/b97-890.

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Seasonal photosynthetic capacity (maximum rate of net photosynthesis at saturating light) was assessed in 30-year-old open-grown Pinus banksiana Lamb, and 20-year-old open-grown and understory Picea glauca (Moench) Voss in central Alberta. Photosynthesis commenced in early April despite cold soils (0 °C) and night frosts. It fluctuated greatly in the summertime during the periods of summer droughts and stopped abruptly in late October when night air temperature dropped below −10 °C. In comparing seasonal maximums, there was proportionally lower photosynthetic capacity in Pinus banksiana than i

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Pilon, C., J. L. Snider, L. A. Moreno, C. K. Kvien, P. Ozias-Akins, and C. C. Holbrook. "Genotypic Differences in Photosynthetic Limitations to Carbon Assimilation in Peanut under Drought at the Onset of Flowering." Peanut Science 51, no. 1 (2024): 126–36. http://dx.doi.org/10.3146/0095-3679-51-ps1625.

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Drought can greatly limit carbon assimilation in plants. However, different species have distinct photosynthetic components governing limitations to photosynthesis exposed to drought conditions. Furthermore, intra-species variations in photosynthetic response to drought is also expected. Information on underlying limitations to carbon assimilation in peanut (Arachis hypogaea L.) has been controversial. Therefore, this study aimed to verify potential drought tolerance associated with the photosynthetic process within ten diverse peanut genotypes grown under drought as well as to determine the l

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8

Wang, Tengqi, Qiying Sun, Yinjian Zheng, Yaliang Xu, Binbin Liu, and Qingming Li. "Effects of Red and Blue Light on the Growth, Photosynthesis, and Subsequent Growth under Fluctuating Light of Cucumber Seedlings." Plants 13, no. 12 (2024): 1668. http://dx.doi.org/10.3390/plants13121668.

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The effects of red and blue light on growth and steady-state photosynthesis have been widely studied, but there are few studies focusing on dynamic photosynthesis and the effects of LED pre-treatment on cucumber seedlings’ growth, so in this study, cucumber (Cucumis sativus L. cv. Jinyou 365) was chosen as the test material. White light (W), monochromatic red light (R), monochromatic blue light (B), and mixed red and blue lights with different red-to-blue ratios (9:1, 7:3, 5:5, 3:7, and 1:9) were set to explore the effects of red and blue light on cucumber seedlings’ growth, steady-state photo

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9

J.A., Aliyev, and Mirzoyev R.S. "Photosynthesis and Productivity of Soybean [Glycine max (L.) Merr.]." Journal of Life Sciences and Biomedicine 66, no. 1 (2011): 63–74. https://doi.org/10.5281/zenodo.7482342.

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The peculiarities of leaf carbon dioxide gas exchange in soybean genotypes grown in field over a large area and contrasting in duration of vegetation, photosynthetic traits and productivity were studied. Varietal differences in the daily and ontogenetic changes in photosynthesis and photorespiration were identified. It was established that the period of the high activity of photosynthetic apparatus in high productive soybean genotypes lasts for a longer time. The photosynthetic rate and the rate of CO2 release in light due to photorespiration are higher in high productive genotypes. The magnit

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10

Roni, Md Zohurul Kadir, Marlon Retana-Cordero, Sarah da Silva Benevenute, et al. "Photosynthetic Activity in Highbush Blueberry Plants: A Review." HortScience 60, no. 8 (2025): 1276–81. https://doi.org/10.21273/hortsci18630-25.

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This comprehensive review examined leaf photosynthetic rates, research methodologies, and existing knowledge gaps in highbush blueberry (Vaccinium corymbosum interspecific hybrids) research through a systematic and quantitative analysis of scientific literature spanning the past six decades. Studies of photosynthesis in northern and southern highbush blueberry were reviewed, revealing a lack of consensus on environmental set points for studying blueberry photosynthesis. Research of northern highbush blueberry has been more prevalent than that of its southern counterpart. According to the liter

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Nagahatenna, Dilrukshi S. K., Jingwen Tiong, Everard J. Edwards, Peter Langridge, and Ryan Whitford. "Altering Tetrapyrrole Biosynthesis by Overexpressing Ferrochelatases (Fc1 and Fc2) Improves Photosynthetic Efficiency in Transgenic Barley." Agronomy 10, no. 9 (2020): 1370. http://dx.doi.org/10.3390/agronomy10091370.

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Ferrochelatase (FC) is the terminal enzyme of heme biosynthesis. In photosynthetic organisms studied so far, there is evidence for two FC isoforms, which are encoded by two genes (FC1 and FC2). Previous studies suggest that these two genes are required for the production of two physiologically distinct heme pools with only FC2-derived heme involved in photosynthesis. We characterised two FCs in barley (Hordeum vulgare L.). The two HvFC isoforms share a common catalytic domain, but HvFC2 additionally contains a C-terminal chlorophyll a/b binding (CAB) domain. Both HvFCs are highly expressed in

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Li, Yu-Ting, Hui-Yuan Gao, and Zi-Shan Zhang. "Effects of Environmental and Non-Environmental Factors on Dynamic Photosynthetic Carbon Assimilation in Leaves under Changing Light." Plants 12, no. 10 (2023): 2015. http://dx.doi.org/10.3390/plants12102015.

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Major research on photosynthesis has been carried out under steady light. However, in the natural environment, steady light is rare, and light intensity is always changing. Changing light affects (usually reduces) photosynthetic carbon assimilation and causes decreases in biomass and yield. Ecologists first observed the importance of changing light for plant growth in the understory; other researchers noticed that changing light in the crop canopy also seriously affects yield. Here, we review the effects of environmental and non-environmental factors on dynamic photosynthetic carbon assimilati

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Gealy, David R., Sheila A. Squier, and Alex G. Ogg. "Photosynthetic Productivity of Mayweed Chamomile (Anthemis cotula)." Weed Science 39, no. 1 (1991): 18–26. http://dx.doi.org/10.1017/s0043174500057805.

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Photosynthetic productivity parameters were determined for mayweed chamomile, a troublesome annual weed of the cropping systems in the Pacific Northwest. At a photosynthetic photon flux density of 1800 μE m−2s–1, maximum net photosynthetic rate of greenhouse-grown plants was 35 mg CO2dm−2h–1and maximum transpiration rate was 6.7 μg H2O cm−2s–1. Dark respiration rate was 1.4 mg CO2dm−2h–1and the light compensation point was 17.5 μE m−2s–1. Carbon dioxide compensation point increased from 25 ppm at 15 C to 43 ppm at 30 C. At saturating photosynthetic photon flux densities, optimum leaf temperatu

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14

Yu-He, Ji, Zhou Guang-Sheng, Ma Xue-Yan, Wang Qiu-Ling, and Liu Tao. "Variable photosynthetic sensitivity of maize (Zea mays L.) to sunlight and temperature during drought development process." Plant, Soil and Environment 63, No. 11 (2017): 505–11. http://dx.doi.org/10.17221/664/2017-pse.

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The complex interaction process of the abiotic factors (sunlight, air temperature and soil water) in regulating maize (Zea mays L.) photosynthesis has not been fully understood. Our field experiment explored the changed sensitivity (or role) of the abiotic factors in regulating maize photosynthesis under a drought development process. The experiment established a scenario with a long-term drought and an instantaneous cloud cover. The results revealed that long-term drought stress causes the sensitivity (or role) of sunlight and temperature exchanged in regulating maize photosynthesis. The maiz

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15

Guo, Ying, Tongli Wang, Fang-Fang Fu, Yousry A. El-Kassaby, and Guibin Wang. "Metabolome and Transcriptome Analyses Reveal the Regulatory Mechanisms of Photosynthesis in Developing Ginkgo biloba Leaves." International Journal of Molecular Sciences 22, no. 5 (2021): 2601. http://dx.doi.org/10.3390/ijms22052601.

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Ginkgo (Ginkgo biloba L.) is a deciduous tree species with high timber, medicinal, ecological, ornamental, and scientific values, and is widely cultivated worldwide. However, for such an important tree species, the regulatory mechanisms involved in the photosynthesis of developing leaves remain largely unknown. Here, we observed variations in light response curves (LRCs) and photosynthetic parameters (photosynthetic capacity (Pnmax) and dark respiration rate (Rd)) of leaves across different developmental stages. We found the divergence in the abundance of compounds (such as 3-phospho-d-glycero

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16

Sales, Cristina R. G., Yu Wang, Jochem B. Evers, and Johannes Kromdijk. "Improving C4 photosynthesis to increase productivity under optimal and suboptimal conditions." Journal of Experimental Botany 72, no. 17 (2021): 5942–60. http://dx.doi.org/10.1093/jxb/erab327.

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Abstract Although improving photosynthetic efficiency is widely recognized as an underutilized strategy to increase crop yields, research in this area is strongly biased towards species with C3 photosynthesis relative to C4 species. Here, we outline potential strategies for improving C4 photosynthesis to increase yields in crops by reviewing the major bottlenecks limiting the C4 NADP-malic enzyme pathway under optimal and suboptimal conditions. Recent experimental results demonstrate that steady-state C4 photosynthesis under non-stressed conditions can be enhanced by increasing Rubisco content

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17

Zagorchev, Lyuben, Alexandra Atanasova, Ivanela Albanova, et al. "Functional Characterization of the Photosynthetic Machinery in Smicronix Galls on the Parasitic Plant Cuscuta campestris by JIP-Test." Cells 10, no. 6 (2021): 1399. http://dx.doi.org/10.3390/cells10061399.

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Members of the genus Cuscuta are generally considered to be non-photosynthetic, stem-holoparasitic flowering plants. Under certain circumstances, at least some members of the genus are capable of limited photosynthesis. The galls of the Smicronyx weevils formed on Cuscuta campestris are particularly rich in chlorophylls compared to the stem of the parasitic plant. In the present study, we aimed to characterize the photosynthetic activity in the inner and outer gall cortices in comparison to the non-photosynthetic stems and a reference plant (Arabidopsis thaliana). The recorded prompt chlorophy

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18

Lie, Gan Wen, Guang Hua Lie, Hou Zhu Mao, and Dong Yu Li. "Study on the Photosynthetic Efficiency of the Bischofia javanica Leaves by Using Photo-Acoustic Tomography Technology." Advanced Materials Research 807-809 (September 2013): 596–600. http://dx.doi.org/10.4028/www.scientific.net/amr.807-809.596.

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By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage detection, the photo-acoustic tomography spectroscopy, optical absorption properties and photosynthetic pigment content of green and red leaves ofBischofia javanicawere studied. The results show that: the photo-acoustic tomography spectroscopy ofBischofia javanicaleaves could be obtained from different chopping frequency and different sample positions, and photosynthetic pigment content of their leaves is closely related to their photosynthetic intensity. The more photosynth

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19

Chen, Sa, Shuyu Li, Shiyuan Qian, Jiale Xing, Jingjing Liao, and Zhifu Guo. "Stress on the Endoplasmic Reticulum Impairs the Photosynthetic Efficiency of Chlamydomonas." International Journal of Molecular Sciences 25, no. 24 (2024): 13304. https://doi.org/10.3390/ijms252413304.

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Stress on the Endoplasmic reticulum (ER) can severely disrupt cellular function by impairing protein folding and post-translational modifications, thereby leading to the accumulation of poor-quality proteins. However, research on its impact on photosynthesis remains limited. In this study, we investigated the impact of ER stress on the photosynthetic efficiency of Chlamydomonas reinhardtii using pharmacological inducers, tunicamycin (TM) and brefeldin A (BFA), which specifically target the ER. Our measurements of photosynthetic parameters showed that these ER stress-inducing compounds caused a

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Bunce, James A. "Species-specific responses to water stress of gas exchange parameters mimicked by applied abscisic acid." Canadian Journal of Botany 65, no. 1 (1987): 103–6. http://dx.doi.org/10.1139/b87-014.

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Net photosynthetic rates and leaf conductances to water vapor were measured in Abutilon theophrasti, Amaranthus hypochondriacus, and Glycine max after injecting abscisic acid into petioles of attached leaves. Changes in substomatal carbon dioxide partial pressure were measured in air in each species for various degrees of inhibition of the photosynthetic rate. Changes in the initial slope of photosynthesis versus substomatal carbon dioxide partial pressure were also characterised in two of the species. Responses to abscisic acid were compared with responses to water stress. Abscisic acid reduc

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Kumudini, S. "Effect of Radiation and Temperature on Cranberry Photosynthesis and Characterization of Diurnal Change in Photosynthesis." Journal of the American Society for Horticultural Science 129, no. 1 (2004): 106–11. http://dx.doi.org/10.21273/jashs.129.1.0106.

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Cranberry [Vaccinium macrocarpon (Ait.)] yield has been associated with photosynthate supply. However, the impact of temperature and radiation on photosynthesis of the cranberry plant is not well understood. The objective of this experiment was to characterize the photosynthetic response to radiation and temperature in order to develop a model for estimation of cranberry photosynthetic rates. Two cranberry cultivars, `Stevens' and `Ben Lear', were tested for photosynthetic response at air temperatures ranging from 15 to 35 °C and radiation intensities from 200 to 1200 μmol·m-2·s-1. Depending o

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N'soukpoé-Kossi, C. N., R. Bélanger, S. Keilani, H. Proteau, P. Boivin, and R. M. Leblanc. "Short-term acid damage to photosynthesis in corn and sugar maple leaves assessed by photoacoustic spectroscopy." Canadian Journal of Botany 68, no. 10 (1990): 2292–300. http://dx.doi.org/10.1139/b90-292.

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Photoacoustic spectroscopy was used to monitor acid damage to photosynthesis by measuring photosynthetic O2 evolution in leaves from com and sugar maple plantlets. For 2 months the seedlings were treated with simulated acid rain either by spraying the leaves or by watering the soil at different pH levels. The results indicated a decline of photosynthetic oxygen evolution as the pH of the foliar application of simulated acid rain decreased. The reduced photosynthetic activity was sometimes followed by depigmentation (below pH 3.5). For plantlets treated by watering the soil with an acid mixture

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Kumudini, S. "Effect of Radiation and Temperature on Cranberry Photosynthesis and Characterization of Diurnal Change in Photosynthesis." Journal of the American Society for Horticultural Science 129, no. 1 (2004): 106–11. https://doi.org/10.21273/jashs.129.1.106.

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Cranberry [Vaccinium macrocarpon (Ait.)] yield has been associated with photosynthate supply. However, the impact of temperature and radiation on photosynthesis of the cranberry plant is not well understood. The objective of this experiment was to characterize the photosynthetic response to radiation and temperature in order to develop a model for estimation of cranberry photosynthetic rates. Two cranberry cultivars, `Stevens' and `Ben Lear', were tested for photosynthetic response at air temperatures ranging from 15 to 35 °C and radiation intensities from 200 to 1200 μmol·m-2·s-1. Depending o

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Liao, Ling, Yi Ronga, Xia Qiua, Tiantian Donga, and Zhihui Wang. "Photosynthetic model for citrus cultivar Huangguogan." Semina: Ciências Agrárias 41, no. 1 (2020): 61. http://dx.doi.org/10.5433/1679-0359.2020v41n1p61.

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Grafting is an effective measure to improve the photosynthetic rate of citrus. The light responses of photosynthesis in leaves of two-year old grafted Huangguogan (citrus cultivar Huangguogan), Huanggougan / Trifoliate (HG/PT), Huanggougan / Tangerine (HG/CR), and Huanggougan / Ziyang Xiangcheng (HG/CJ) were studied using the LI-COR 6400 portable photosynthesis system. Light-response curves and photosynthetic parameters were analyzed and fitted using the rectangular hyperbola model (RHM), the exponential model (EM), the non rectangular hyperbola model (NRHM), and the modified rectangular hyper

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Tasnim, Rafa, and Yong-Jiang Zhang. "Are Wild Blueberries a Crop with Low Photosynthetic Capacity? Chamber-Size Effects in Measuring Photosynthesis." Agronomy 11, no. 8 (2021): 1572. http://dx.doi.org/10.3390/agronomy11081572.

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Wild lowbush blueberries, an important fruit crop native to North America, contribute significantly to the economy of Maine, USA, Atlantic Canada, and Quebec. However, its photosynthetic capacity has not been well-quantified, with only a few studies showing its low photosynthetic rates. Its small leaves make accurate leaf-level photosynthetic measurements difficult and introduce potential uncertainties in using large leaf chambers. Here, we determined the photosynthetic rate for five different wild blueberry genotypes using a big leaf chamber enclosing multiple leaves and a small leaf chamber

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Zhu, Jun-Tao, Xiang-Yi Li, Xi-Ming Zhang, Qiang Yu, and Li-Sha Lin. "Leaf nitrogen allocation and partitioning in three groundwater-dependent herbaceous species in a hyper-arid desert region of north-western China." Australian Journal of Botany 60, no. 1 (2012): 61. http://dx.doi.org/10.1071/bt11181.

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Groundwater-dependent vegetation (GDV) is useful as an indicator of watertable depth and water availability in north-western China. Nitrogen (N) is an essential limiting resource for growth of GDV. To elucidate how leaf N allocation and partitioning influence photosynthesis and photosynthetic N-use efficiency (PNUE), three typical GDV species were selected, and their photosynthesis, leaf N allocation and partitioning were investigated in the Taklamakan Desert. The results showed that Karelinia caspica (Pall.) Less. and Peganum harmala L. had lower leaf N content, and allocated a lower fraction

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Nie, Xin, Andreas Jäger, Janek Börner, and Gabriele Klug. "Interplay between formation of photosynthetic complexes and expression of genes for iron–sulfur cluster assembly in Rhodobacter sphaeroides?" Photosynthesis Research 147, no. 1 (2020): 39–48. http://dx.doi.org/10.1007/s11120-020-00789-w.

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AbstractFormation of photosynthetic complexes leads to a higher demand for Fe–S clusters. We hypothesized that in the facultative phototrophic alpha-proteobacterium Rhodobacter sphaeroides expression of the isc-suf operon for Fe–S cluster formation may be increased under conditions that promote formation of photosynthetic complexes and that, vice versa, lack of the IscR regulator may also affect photosynthesis gene expression. To test this hypothesis, we monitored the activities of the isc-suf sense and anti-sense promoters under different growth conditions and in mutants which are impaired in

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Hu, Xiche, Thorsten Ritz, Ana Damjanović, Felix Autenrieth, and Klaus Schulten. "Photosynthetic apparatus of purple bacteria." Quarterly Reviews of Biophysics 35, no. 1 (2002): 1–62. http://dx.doi.org/10.1017/s0033583501003754.

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1. Introduction 22. Structure of the bacterial PSU 52.1 Organization of the bacterial PSU 52.2 The crystal structure of the RC 92.3 The crystal structures of LH-II 112.4 Bacteriochlorophyll pairs in LH-II and the RC 132.5 Models of LH-I and the LH-I-RC complex 152.6 Model for the PSU 173. Excitation transfer in the PSU 183.1 Electronic excitations of BChls 22 3.1.1 Individual BChls 22 3.1.2 Rings of BChls 22 3.1.2.1 Exciton states 22 3.1.3 Effective Hamiltonian 24 3.1.4 Optical properties 25 3.1.5 The effect of disorder 263.2 Theory of excitation transfer 29 3.2.1 General theory 29 3.2.2 Mecha

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Evans, JR. "Photosynthetic Acclimation and Nitrogen Partitioning Within a Lucerne Canopy. II. Stability Through Time and Comparison With a Theoretical Optimum." Functional Plant Biology 20, no. 1 (1993): 69. http://dx.doi.org/10.1071/pp9930069.

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Nitrogen redistribution between and within leaves was examined in a plot of lucerne (Medicago sativa L. cv. Aurora) in relation to potential canopy photosynthesis. The canopy was sampled during regrowth after cutting and just prior to flowering. As leaves were progressively shaded by the newly produced leaves, nitrogen content fell and photosynthetic acclimation occurred. The rate of acclimation in the canopy was the same as occurred following a step change to 23 or 6% sunlight. The profile of leaf nitrogen content was stable with respect to leaf area index and independent of time of sampling.

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Lukáčová, Alexandra, and Matej Vesteg. "Multiple Independent Losses of Photosynthetic Ability in Eukaryotic Evolution and the Metabolism of Non-Photosynthetic Plastids." Chemické listy 116, no. 5 (2022): 316–23. http://dx.doi.org/10.54779/chl20220316.

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Multiple independent losses of photosynthesis have occurred among several unrelated eukaryotic lineages including red and green algae, land plants, alveolates, stramenopiles, cryptophytes and euglenophytes. Most plastid genomes of non-photosynthetic eukaryotes do not contain genes associated with photosynthesis, but they usually encode at least one gene product involved in an essential non-photosynthetic metabolic pathway. Complete loss of plastid genome and simultaneous retention of plastid compartment is rare, and complete plastid loss is documented only for few alveolate species. Non-photos

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Warnock, Daniel, William Randle, and Mark Rieger. "PHOTOSYNTHESIS AND TRANSPIRATION DURING GROWTH AND DEVELOPMENT OF ALLIUM CEPA L." HortScience 28, no. 4 (1993): 263B—263. http://dx.doi.org/10.21273/hortsci.28.4.263b.

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Photosynthesis is the very essence of agriculture. Previous photosynthetic and transpirational studies of onion (Allium cepa) have been limited to specific developmental stages. Our study measured photosynthesis and transpiration in sixteen plants of a single short-day cultivar over an eleven week period containing both non- and bulb inductive photoperiods. Differences in weekly means for photosynthesis, leaf conductance, water use efficiency, and intercellular CO, were highly significant. Weekly photosynthetic means increased under a non-inductive photoperiod and peaked one week after initiat

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Lie, Gan Wen, Guang Hua Lie, Ding Chao Pan, Long Hua Ye, and Dong Yu Li. "Study on the Photosynthetic Efficiency of the Bauhinia blakeana Leaves by Using Photo-Acoustic Tomography Technology." Advanced Materials Research 807-809 (September 2013): 1010–14. http://dx.doi.org/10.4028/www.scientific.net/amr.807-809.1010.

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By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage detection, the photo-acoustic tomography spectroscopy and optical absorption properties of green and yellow leaves ofBauhinia blakeanawere studied. The results show that: the photo-acoustic tomography spectroscopy ofBauhinia blakeanaleaves could be obtained from different chopping frequency and different sample positions, and photosynthetic pigment content of their leaves is closely related to their photosynthetic intensity. The more photosynthetic pigment content the leaves

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Liu, Xiang, Shenghao Gu, Weiliang Wen, et al. "Disentangling the Heterosis in Biomass Production and Radiation Use Efficiency in Maize: A Phytomer-Based 3D Modelling Approach." Plants 12, no. 6 (2023): 1229. http://dx.doi.org/10.3390/plants12061229.

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Maize (Zea mays L.) benefits from heterosis in-yield formation and photosynthetic efficiency through optimizing canopy structure and improving leaf photosynthesis. However, the role of canopy structure and photosynthetic capacity in determining heterosis in biomass production and radiation use efficiency has not been separately clarified. We developed a quantitative framework based on a phytomer-based three-dimensional canopy photosynthesis model and simulated light capture and canopy photosynthetic production in scenarios with and without heterosis in either canopy structure or leaf photosynt

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Urban, Aleksandra, Paweł Rogowski, Wioleta Wasilewska-Dębowska, and Elżbieta Romanowska. "Understanding Maize Response to Nitrogen Limitation in Different Light Conditions for the Improvement of Photosynthesis." Plants 10, no. 9 (2021): 1932. http://dx.doi.org/10.3390/plants10091932.

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The photosynthetic capacity of leaves is determined by their content of nitrogen (N). Nitrogen involved in photosynthesis is divided between soluble proteins and thylakoid membrane proteins. In C4 plants, the photosynthetic apparatus is partitioned between two cell types: mesophyll cells and bundle sheath. The enzymes involved in the C4 carbon cycle and assimilation of nitrogen are localized in a cell-specific manner. Although intracellular distribution of enzymes of N and carbon assimilation is variable, little is known about the physiological consequences of this distribution caused by light

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Claypool, Nicholas B., and J. Heinrich Lieth. "Green Light Improves Photosystem Stoichiometry in Cucumber Seedlings (Cucumis sativus) Compared to Monochromatic Red Light." Plants 10, no. 5 (2021): 824. http://dx.doi.org/10.3390/plants10050824.

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It has been shown that monochromatic red and blue light influence photosynthesis and morphology in cucumber. It is less clear how green light impacts photosynthetic performance or morphology, either alone or in concert with other wavelengths. In this study, cucumber (Cucumis sativus) was grown under monochromatic blue, green, and red light, dichromatic blue–green, red–blue, and red–green light, as well as light containing red, green, and blue wavelengths, with or without supplemental far-red light. Photosynthetic data collected under treatment spectra at light-limiting conditions showed that b

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Abhilash, K. P., and A. S. Devakumar. "Seasonal Photosynthesis Variations of Dominant Tree Species Used in Different Urban Landscapes." International Journal of Environment and Climate Change 13, no. 8 (2023): 562–71. http://dx.doi.org/10.9734/ijecc/2023/v13i81984.

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Photosynthesis is the only natural process that converts photon energy into chemical energy, and it is responsible for 90–95% of plant biomass accumulation and hence growth. Environmental factors such as light, temperature, and CO2 concentration in the atmosphere are major factors that influence photosynthesis, and excess of these can cause stress on plants. The photosynthetic response of tree species is found to vary to these factors. Therefore, the photosynthetic response of tree species can be a good indicator to assess these environmental factors that are changing due to urbanization and c

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Chang, Tian-Gen, Zai Shi, Honglong Zhao, et al. "3dCAP-Wheat: An Open-Source Comprehensive Computational Framework Precisely Quantifies Wheat Foliar, Nonfoliar, and Canopy Photosynthesis." Plant Phenomics 2022 (July 21, 2022): 1–19. http://dx.doi.org/10.34133/2022/9758148.

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Canopy photosynthesis is the sum of photosynthesis of all above-ground photosynthetic tissues. Quantitative roles of nonfoliar tissues in canopy photosynthesis remain elusive due to methodology limitations. Here, we develop the first complete canopy photosynthesis model incorporating all above-ground photosynthetic tissues and validate this model on wheat with state-of-the-art gas exchange measurement facilities. The new model precisely predicts wheat canopy gas exchange rates at different growth stages, weather conditions, and canopy architectural perturbations. Using the model, we systematic

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Ribeiro, Rafael Vasconcelos, Eduardo Caruso Machado, and Ricardo Ferraz de Oliveira. "Temperature response of photosynthesis and its interaction with light intensity in sweet orange leaf discs under non-photorespiratory condition." Ciência e Agrotecnologia 30, no. 4 (2006): 670–78. http://dx.doi.org/10.1590/s1413-70542006000400012.

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This study aimed to evaluate the response of photosynthesis (A), given by photosynthetic O2 evolution, to increasing temperature from 25 to 50ºC in sweet orange (Citrus sinensis (L.) Osbeck) leaf discs under non-photorespiring conditions. In order to evaluate the response of gross photosynthesis to temperature and the balance between photosynthetic and respiratory activities, respiration (Rd) rates were also measured, i.e. the O2 uptake in each temperature. In addition, light response curves of photosynthesis were performed by varying the photosynthetic photon flux density (PPFD) from 0 to 116

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Munger, Philip H., James M. Chandler, and J. Tom Cothren. "Effect of Water Stress on Photosynthetic Parameters of Soybean (Glycine max) and Velvetleaf (Abutilon theophrasti)." Weed Science 35, no. 1 (1987): 15–21. http://dx.doi.org/10.1017/s0043174500026722.

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Greenhouse experiments were conducted to elucidate the effects of water stress on photosynthetic parameters of soybean [Glycine max(L.) Merr. ‘Hutton′] and velvetleaf (Abutilon theophrastiMedik. # ABUTH). Stomatal conductance of both species responded curvilinearly to reductions in leaf water potential. At leaf water potentials less negative than −2.5 MPa, stomatal conductance, net photosynthetic rate, and transpiration rate were greater in velvetleaf than in soybean. Soybean photosynthetic rate was linearly related to stomatal conductance. Velvetleaf photosynthetic rate increased linearly wit

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Li, Yong. "Evaluation of Photosynthetic Characters and Regulation Pattern of Photosynthesis Associated Gene in Two Mulberry Varieties." International Journal of Agriculture and Biology 25, no. 04 (2021): 863–72. http://dx.doi.org/10.17957/ijab/15.1740.

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Photosynthetic characteristics and expression patterns of the photosynthesis-related genes in the high-yield mulberry variety E’Sang 1 (E1) and normal mulberry variety Husang 32 (H32) were investigated in this study. The observation of daily variation of photosynthesis in E1 and H32 indicated that the peak of net photosynthetic rate(Pn)inE1 variety was significantly higher than that inH32 (P <0.05). Meanwhile, the Pn-PAR and Pn-Ci responses of E1 and H32 were evaluated, and the results showed that the carboxylation efficiency and compensation saturation point were much higher in E1 rather t

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Groninger, J. W., J. R. Seiler, S. M. Zedaker, and P. C. Berrang. "Photosynthetic response of loblolly pine and sweetgum seedling stands to elevated carbon dioxide, water stress, and nitrogen level." Canadian Journal of Forest Research 26, no. 1 (1996): 95–102. http://dx.doi.org/10.1139/x26-010.

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Seedling stands of loblolly pine (Pinustaeda L.) and sweetgum (Liquidambarstyraciflua L.) were grown in monoculture or mixed stands for two growing cycles in controlled-environment chambers. Treatments consisted of ambient (408 ppm) and elevated (806 ppm) CO2, concentrations, water-stressed and well-watered conditions, and low (20 kg N/ha) and high (215 kg N/ha) nitrogen application rates. Photosynthesis rates were measured under ambient and elevated cuvette CO2 concentrations for both whole stands and individual seedlings from these stands. Significant interactions between CO2 and water sugge

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Vidaver, William, Wolfgang Binder, R. C. Brooke, G. R. Lister, and P. M. A. Toivonen. "Assessment of photosynthetic activity of nursery-grown Piceaglauca seedlings using an integrating fluorometer to monitor variable chlorophyll fluorescence." Canadian Journal of Forest Research 19, no. 11 (1989): 1478–82. http://dx.doi.org/10.1139/x89-224.

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Photosynthetic activity of intact nursery-grown white spruce (Piceaglauca (Moench) Voss) seedlings was assessed by measuring CO2 exchange (apparent photosynthesis) and normalized, integrated variable chlorophyll fluorescence emission. Agreement between fluorescence and apparent photosynthesis indicated that photosynthetic inactivation of seedlings from selected seedlots began in mid-August and approached completion in late October. Inactivation occurred somewhat earlier in northern seedlot seedlings than in those from a more southerly provenance. Seedlings tested in late October showed signifi

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Marcos-Arenal, Pablo, Luis Cerdán, Mercedes Burillo-Villalobos, et al. "ExoPhot: The Photon Absorption Rate as a New Metric for Quantifying the Exoplanetary Photosynthetic Activity Fitness." Universe 8, no. 12 (2022): 624. http://dx.doi.org/10.3390/universe8120624.

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Only a low percentage of the radiation from our Sun is captured by photosynthesis, but this conversion of solar to chemical energy sustains all life on Earth. Photosynthesis could be present in any exoplanetary system fulfilling the main three ingredients for this metabolic route: light, water, and carbon dioxide. To deepen into this idea, the ExoPhot project aims to study the relation between photosynthetic systems and exoplanet conditions around different types of stars by focusing on two aspects: (i) Assessing the photosynthetic fitness of a variety of photopigments (either found on Earth o

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Shabanova, Mehriban, Sergei Zharmukhamedov, and Suleyman Allakhverdiev. "Influence of a novel organometallic Cu(II) complex on the photochemical activity of Photosystem II in spinach." Transactions of the Institute of Molecular Biology & Biotechnologies 9, no. 1 (2025): 47–51. https://doi.org/10.62088/timbb/9.1.6.

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Photosynthesis is an attractive target for inhibitory compounds, both for the development of new herbicides and for advancing the understanding of photosynthetic processes. The synthetic [CuL₂]Br₂ complex was studied for its inhibitory effect on the photosynthetic activity of photosystem II. It was demonstrated that a complex containing a benzothiazole group is an effective suppressor of photosynthetic activity. Keywords: Organometallic complexes, DCMU, OJIP, inhibitors

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Xu, Ming Yi, Ao Xue Wang, and Hong Wei Ni. "Effect of Elevated CO₂ Concentration on Leaf Photosynthesis in Sanjiang-Deyeuxia angustifolia." Advanced Materials Research 726-731 (August 2013): 305–9. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.305.

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Deyeuxia angustifolia were grown under three different levels of CO2concentration conditions, 370μmol mol-1(ambient CO2), 550μmol mol-1(elevated CO2) and 700μmol mol-1(elevated CO2) respectively. We investigated the responses of photosynthesis and growth ofD.angustifoliaunder different CO2concentration conditions. Leaf photosynthesis and chlorophyll content were checked. The results showed that the values of net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO2concentration (Ci), transpiration (E), chlorophyll content were influenced by the elevated CO2concentrations. The

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Bouhache, Mohamed, and David E. Bayer. "Photosynthetic Response of Flooded Rice (Oryza sativa) and ThreeEchinochloaSpecies to Changes in Environmental Factors." Weed Science 41, no. 4 (1993): 611–14. http://dx.doi.org/10.1017/s0043174500076402.

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The photosynthetic responses of rice (C3) and threeEchinochloaspecies (C4), barnyardgrass, early watergrass, and late watergrass, to changes in CO2intercellular partial pressure, light intensity, and leaf temperature were investigated under laboratory conditions. The threeEchinochloaspecies exhibited photosynthetic responses characteristic of C4plants. The three weedy species showed higher efficiency for CO2utilization at low CO2intercellular partial pressure (CO2i) than rice. Compensation and saturation of CO2i for photosynthesis were lower in the weedy species than in rice. The maximum photo

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Kroh, Gretchen E., and Marinus Pilon. "Regulation of Iron Homeostasis and Use in Chloroplasts." International Journal of Molecular Sciences 21, no. 9 (2020): 3395. http://dx.doi.org/10.3390/ijms21093395.

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Iron (Fe) is essential for life because of its role in protein cofactors. Photosynthesis, in particular photosynthetic electron transport, has a very high demand for Fe cofactors. Fe is commonly limiting in the environment, and therefore photosynthetic organisms must acclimate to Fe availability and avoid stress associated with Fe deficiency. In plants, adjustment of metabolism, of Fe utilization, and gene expression, is especially important in the chloroplasts during Fe limitation. In this review, we discuss Fe use, Fe transport, and mechanisms of acclimation to Fe limitation in photosyntheti

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Wu, Yanyou. "Is bicarbonate directly used as substrate to participate in photosynthetic oxygen evolution." Acta Geochimica 40, no. 4 (2021): 650–58. http://dx.doi.org/10.1007/s11631-021-00484-0.

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AbstractIf the photosynthetic organisms assimilated only CO2 in the Archean atmosphere, hydroxide ion in the Archean seawater would not increase. If plants would not consume bicarbonate as a direct substrate during photosynthesis, it is difficult to explain the evolution of Earth's environment. To date, it is generally accepted that photosynthetic O2 evolution of plants come from water photolysis. However, it should be debated by evaluating the effect of bicarbonate in photosynthetic O2 evolution, analyzing the role of carbonic anhydrase (CA) in photosynthetic O2 evolution, and the relationshi

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Suarez, Julio V., Elisabeth A. Mudd, and Anil Day. "A Chloroplast-Localised Fluorescent Protein Enhances the Photosynthetic Action Spectrum in Green Algae." Microorganisms 10, no. 9 (2022): 1770. http://dx.doi.org/10.3390/microorganisms10091770.

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Green microalgae are important sources of natural products and are attractive cell factories for manufacturing high-value products such as recombinant proteins. Increasing scales of production must address the bottleneck of providing sufficient light energy for photosynthesis. Enhancing the photosynthetic action spectrum of green algae to improve the utilisation of yellow light would provide additional light energy for photosynthesis. Here, we evaluated the Katushka fluorescent protein, which converts yellow photons to red photons, to drive photosynthesis and growth when expressed in Chlamydom

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Nikkanen, Lauri, and Eevi Rintamäki. "Chloroplast thioredoxin systems dynamically regulate photosynthesis in plants." Biochemical Journal 476, no. 7 (2019): 1159–72. http://dx.doi.org/10.1042/bcj20180707.

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Abstract Photosynthesis is a highly regulated process in photoautotrophic cells. The main goal of the regulation is to keep the basic photosynthetic reactions, i.e. capturing light energy, conversion into chemical energy and production of carbohydrates, in balance. The rationale behind the evolution of strong regulation mechanisms is to keep photosynthesis functional under all conditions encountered by sessile plants during their lifetimes. The regulatory mechanisms may, however, also impair photosynthetic efficiency by overriding the photosynthetic reactions in controlled environments like cr

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