Variation in thermotolerance of photosystem II energy trapping, intersystem electron transport, and photosystem I electron acceptor reduction for diverse cotton genotypes

Kaur, Navneet; Snider, John L.; Paterson, Andrew H.; Grey, Timothy L.; Li, Changying; Virk, Gurpreet; Parkash, Ved

doi:10.1016/j.plaphy.2023.107868

Cited by 7 publications

(2 citation statements)

References 73 publications

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“…Particularly, the present study observed the sensitivity of RuBisCO activity to heat, especially for the species with lower leaf thickness. Earlier studies infer that high temperature limits photosynthesis by ceasing the activity of the enzyme RuBisCOactivase 117 , 120 , 121 ; however, the activity is reversed upon cooling 122 . This study also found a positive relationship between soil nitrogen availability and photosynthesis rate, and it was predominantly high in the taxa that had the potential to fix nitrogen in the soil, also substantiated by earlier investigations 123 – 126 .…”

Section: Discussionmentioning

confidence: 99%

Characterization of carbon fluxes, stock and nutrients in the sacred forest groves and invasive vegetation stands within the human dominated landscapes of a tropical semi-arid region

Akil Prasath,

Mohanraj,

Balaramdas

et al. 2024

Sci Rep

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In the semi-arid plains of Southern India, outside the protected area network, sacred groves forests and the barren lands invaded by Prosopis juliflora are reckoned to be the major greenery, but have homogenous and heterogeneous vegetation respectively. This study attempted to compare 50 Sacred Groves Stands (SGS) and 50 monodominant Prosopis juliflora Stands (PJS) for the functional diversity, evenness, floral diversity, carbon stock and dynamics, carbon-fixing traits, dendrochronology of trees, soil nutrient profiles, and soil erosion. Quadrat sample survey was adopted to record stand density, species richness, abundance, basal area and leaf area index; composite soil samples were collected at depths 0–30 cm for nutrient profiling (N, P, K, and OC). Photosynthesis rate (µmole co2 m2/sec), air temperature (°c), leaf intracellular co2 concentration (ppm), ambient photosynthetic active radiation (µmole m2/sec), transpiration rate (m. mole H2O m2/sec) were determined for the 51 tree species existed in SGS and PJS using Plant Photosynthesis system. Structural Equation Model (SEM) was applied to derive the carbon sequestering potential and photosynthetic efficiency of eight dominant tree species using vital input parameters, including eco-physiological, morphological, and biochemical characterization. The Revised Universal Soil Loss Equation (RUSLE) model, in conjunction with ArcGIS Pro and ArcGIS 10.3, was adopted to map soil loss. Carbon source/sink determinations inferred through Net Ecosystem Productivity (NEP) assessments showed that mature SGS potentially acted as a carbon sink (0.06 ± 0.01 g C/m2/day), while matured PJS acted as a carbon source (−0.34 ± 0.12 g C/m2/day). Soil erosion rates were significantly greater (29.5 ± 13.4 ton/ha/year) in SGS compared to PJS (7.52 ± 2.55 ton/ha/year). Of the eight selected tree species, SEM revealed that trees belonging to the family Fabaceae [Wrightia tinctoria (estimated coefficient: 1.28, p = 0.02) > Prosopis juliflora (1.22, p = 0.01) > Acacia nilotica (1.21, p = 0.03) > Albizia lebbeck (0.97, p = 0.01)] showed comparatively high carbon sequestering ability.

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Section: Discussionmentioning

confidence: 99%

Characterization of carbon fluxes, stock and nutrients in the sacred forest groves and invasive vegetation stands within the human dominated landscapes of a tropical semi-arid region

Akil Prasath,

Mohanraj,

Balaramdas

et al. 2024

Sci Rep

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“…After light-adapted measurements, the uppermost fully expanded leaves from two plants per plot were excised and transferred to the laboratory in plastic bags under moist conditions to prevent desiccation as described in previous studies (Gimeno et al 2009, Kaur et al 2023. Samples were then dark-adapted overnight at room temperature.…”

Section: Ojip Fluorescence Measurementsmentioning

confidence: 99%

Diffusional and Biochemical Limitations to Photosynthesis Under Water Deficit for Field‐Grown Cotton

Parkash,

Snider,

Virk

et al. 2024

Physiologia Plantarum

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Water deficit stress limits net photosynthetic rate (AN), but the relative sensitivities of underlying processes such as thylakoid reactions, ATP production, carbon fixation reactions, and carbon loss processes to water deficit stress in field‐grown upland cotton require further exploration. Therefore, the objective of the present study was to assess (1) the diffusional and biochemical mechanisms associated with water deficit‐induced declines in AN and (2) associations between water deficit‐induced variation in oxidative stress and energy dissipation for field‐grown cotton. Water deficit stress was imposed for three weeks during the peak bloom stage of cotton development, causing significant reductions in leaf water potential and AN. Among diffusional limitations, mesophyll conductance was the major contributor to the AN decline. Several biochemical processes were adversely impacted by water deficit. Among these, electron transport rate and RuBP regeneration were most sensitive to AN‐limiting water deficit. Carbon loss processes (photorespiration and dark respiration) were less sensitive than carbon assimilation, contributing to the water deficit‐induced declines in AN. Increased energy dissipation via non‐photochemical quenching or maintenance of electron flux to photorespiration prevented oxidative stress. Declines in AN were not associated with water deficit‐induced variation in ATP production. It was concluded that diffusional limitations followed by biochemical limitations (ETR and RuBP regeneration) contributed to declines in AN, carbon loss processes partially contributed to the decline in AN, and increased energy dissipation prevented oxidative stress under water deficit in field‐grown cotton.

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Genotypic variation in growth, single leaf physiology, and acclimation potential of thylakoid processes in cotton exposed to high temperature extremes

Kaur,

Snider,

Parkash

et al. 2023

Environmental and Experimental Botany

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Variation in thermotolerance of photosystem II energy trapping, intersystem electron transport, and photosystem I electron acceptor reduction for diverse cotton genotypes

Cited by 7 publications

References 73 publications

Characterization of carbon fluxes, stock and nutrients in the sacred forest groves and invasive vegetation stands within the human dominated landscapes of a tropical semi-arid region

Characterization of carbon fluxes, stock and nutrients in the sacred forest groves and invasive vegetation stands within the human dominated landscapes of a tropical semi-arid region

Diffusional and Biochemical Limitations to Photosynthesis Under Water Deficit for Field‐Grown Cotton

Genotypic variation in growth, single leaf physiology, and acclimation potential of thylakoid processes in cotton exposed to high temperature extremes

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