Differential heat-induced changes in the CO<sub>2</sub>assimilation rate and electron transport in tomato (<i>Lycopersicon esculentum</i>Mill.)

Camejo, Daymi; Nicolás, Emilio; Torres, W; Alarcón, Juan José

doi:10.1080/14620316.2010.11512644

Cited by 9 publications

(6 citation statements)

References 27 publications

(42 reference statements)

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“…The OJIP transients were suggested to be more sensitive than F V / F M for analyzing physiological damage to photosynthetic machinery under heat and chilling stresses [ 63 ]. Similar findings were reported in apple fruit [ 64 ] and tomato [ 65 ] where the F V / F M remained similar even when the temperature difference between control and stressed samples was from 10 to 17°C.…”

Section: Discussionsupporting

confidence: 88%

In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

Gururani

Venkatesh²,

Ganesan³

et al. 2015

PLoS ONE

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Chlorophyll-a fluorescence analysis provides relevant information about the physiology of plants growing under abiotic stress. In this study, we evaluated the influence of cold stress on the photosynthetic machinery of transgenic turfgrass, Zoysia japonica, expressing oat phytochrome A (PhyA) or a hyperactive mutant phytochrome A (S599A) with post-translational phosphorylation blocked. Biochemical analysis of zoysiagrass subjected to cold stress revealed reduced levels of hydrogen peroxide, increased proline accumulation, and enhanced specific activities of antioxidant enzymes compared to those of control plants. Detailed analyses of the chlorophyll-a fluorescence data through the so-called OJIP test exhibited a marked difference in the physiological status among transgenic and control plants. Overall, these findings suggest an enhanced level of cold tolerance in S599A zoysiagrass cultivars as reflected in the biochemical and physiological analyses. Further, we propose that chlorophyll-a fluorescence analysis using OJIP test is an efficient tool in determining the physiological status of plants under cold stress conditions.

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Section: Discussionsupporting

confidence: 88%

In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

Gururani

Venkatesh²,

Ganesan³

et al. 2015

PLoS ONE

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“…The F V /F M ratio was observed to show very few differences between the genotypes compared to the OJIP transients, suggesting that the OJIP transients were more sensitive for determining the physiological damage to the photosynthetic machinery [48]. Similar findings were reported in different crops where the F V /F M ratio was not significantly altered, even when the plants were subjected to cold conditions [49,50]. The OJIP transient of the oat plants changed drastically post PEG treatment.…”

Section: Discussionsupporting

confidence: 70%

Chlorophyll-a Fluorescence Analysis Reveals Differential Response of Photosynthetic Machinery in Melatonin-Treated Oat Plants Exposed to Osmotic Stress

Alyammahi

Gururani

2020

Agronomy

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In this study, the effects of melatonin-induced enhancement on the principal photosynthetic parameters and antioxidant machinery were investigated in Avena sativa (oat) plants exposed to polyethylene glycol (PEG)-induced osmotic stress. The parameters of growth, chlorophyll content, stomatal conductance, proline accumulation, lipid peroxidation, and electrolyte leakage showed noteworthy improvements between the groups. Melatonin treatment caused upregulation of the genes that encode the three major antioxidant enzymes: ascorbate peroxidase (APX), superoxide dismutase (SOD) and catalase (CAT). Chlorophyll-a fluorescence kinetic analyses revealed that melatonin treatment improved performance indices (PIABS and PItotal), quantum yields, and efficiencies of photosystem II (PSII) in oat plants subjected to PEG-induced osmotic stress. Furthermore, upregulation of five genes (PsbA, PsbB, PsbC, PsbD, and PsbO) that encode the core proteins of PSII implied melatonin exerted a positive influence on photosynthesis under conditions of osmotic stress.

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“…The effective quantum yield of PSII (PhiPSII) and the coefficient of photochemical quenching (qP) and nonphotochemical quenching (qN) [22] were calculated as follows: PhiPSII = (F max ' − F s )/F max ' qP = (F max '− F s )/(F max '− F min ') qN = (F max − F max ')/(F max − F min ' ) 2.2.3. Antioxidant Activity (1,1-Diphenyl-2-picrylhydrazyl Assay) At 7, 14, and 21 DAT, the plant leaves from each treatment were sampled and stored at −60 • C for the subsequent analyses (n = 6 in Experiment 1 and n = 8 in Experiment 2).…”

Section: Chlorophyll Fluorescence Characteristicsmentioning

confidence: 99%

Continuous Lighting and High Daily Light Integral Enhance Yield and Quality of Mass-Produced Nasturtium (Tropaeolum majus L.) in Plant Factories

Kikuchi

et al. 2021

Plants

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Nasturtium (Tropaeolum majus L.), as a medicinal plant, has a high phenolic content in its leaves and flowers. It is often used in salads as a dietary vegetable. Attracting strong demand, it could be a good candidate crop for a plant factory with artificial lighting (PFAL) that can achieve the mass production of high-quality crops with high productivity by regulating environmental conditions such as light. In this study, two experiments were conducted to investigate the effects of continuous lighting (CL) and different daily light integrals (DLIs) under CL on the growth, secondary metabolites, and light use efficiency (LUE) of nasturtium, all of which are essential in the successful cultivation in PFALs. In Experiment 1, two lighting models, the same DLI of 17.3 mol m-2 d-1 but different light periods (24 and 16 h) with different light intensities (200 and 300 µmol m−2 s−1, respectively), were applied to nasturtium. The results showed that leaf production, secondary metabolites, and LUE were higher under the 24-h CL treatment than under the 16-h non-CL treatment. In Experiment 2, three DLI levels (17.3, 25.9, and 34.6 mol m-2 d-1) under the CL condition were applied. The results showed that the growth parameters were positively correlated with the DLI levels under CL. The lowest DLI had the highest LUE. We conclude that the mass production of nasturtium under CL in PFALs is feasible, and the yield increases as DLI increases from 17.3 to 34.6 mol m-2 d-1 under CL without causing physiological stress on plants.

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Differential heat-induced changes in the CO₂assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)

Cited by 9 publications

References 27 publications

In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

Chlorophyll-a Fluorescence Analysis Reveals Differential Response of Photosynthetic Machinery in Melatonin-Treated Oat Plants Exposed to Osmotic Stress

Continuous Lighting and High Daily Light Integral Enhance Yield and Quality of Mass-Produced Nasturtium (Tropaeolum majus L.) in Plant Factories

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Differential heat-induced changes in the CO2assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)

Cited by 9 publications

References 27 publications

In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

In Vivo Assessment of Cold Tolerance through Chlorophyll-a Fluorescence in Transgenic Zoysiagrass Expressing Mutant Phytochrome A

Chlorophyll-a Fluorescence Analysis Reveals Differential Response of Photosynthetic Machinery in Melatonin-Treated Oat Plants Exposed to Osmotic Stress

Continuous Lighting and High Daily Light Integral Enhance Yield and Quality of Mass-Produced Nasturtium (Tropaeolum majus L.) in Plant Factories

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Differential heat-induced changes in the CO₂assimilation rate and electron transport in tomato (Lycopersicon esculentumMill.)