Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

Gururani, Mayank Anand; Venkatesh, Jelli; Tran, Lam‐Son Phan

doi:10.1016/j.molp.2015.05.005

Cited by 613 publications

(353 citation statements)

References 202 publications

(325 reference statements)

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“…Protective effect of 24-epi-BR on PSII in plants exposed to various stressors was previously noted in oilseed rape and barley (Janeczko et al 2005. BRs, which are known to increase the activity of antioxidant enzymes in plants (Yuan et al 2012), may help to neutralize ROS and to reduce the damage of PSII (Gururani et al 2015). Furthermore, BRs (similary to sterols) may stabilize the structure of cell membranes (Grunwald 1974), and by this way decrease the damaging effect of stresses.…”

Section: Discussionmentioning

confidence: 87%

Comparative studies of compatible and incompatible pepper-Tobamovirus interactions and the evaluation of effects of 24-epibrassinolide

Janeczko¹,

Dziurka²,

Gullner³

et al. 2018

Photosynt.

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The aim of study was to gain a deeper knowledge about local and systemic changes in photosynthetic processes and sugar production of pepper infected by Obuda pepper virus (ObPV) and Pepper mild mottle virus (PMMoV). PSII efficiency, reflectance, and gas exchange were measured 48 and/or 72 h after inoculation (hpi). Sugar accumulation was checked 72 hpi and 20 d after inoculation (as a systemic response). Inoculation of leaves with ObPV led to appearance of hypersensitive necrotic lesions (incompatible interaction), while PMMoV caused no visible symptoms (compatible interaction). ObPV (but not PMMoV) lowered F v /F m (from 0.827 to 0.148 at 72 hpi). Net photosynthesis decreased in ObPV-infected leaves. In ObPV-inoculated leaves, the accumulation of glucose, fructose, and glucose-6-phosphate was accompanied with lowered sucrose, maltoheptose, nystose, and trehalose contents. PMMoV inoculation increased the contents of glucose, maltose, and raffinose in the inoculated leaves, while glucose-6-phosphate accummulated in upper leaves.Additional key words: brassinosteroids; CO2 assimilation; systemic virus response; water band index; xanthophyll cycle.

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Section: Discussionmentioning

confidence: 87%

Comparative studies of compatible and incompatible pepper-Tobamovirus interactions and the evaluation of effects of 24-epibrassinolide

Janeczko¹,

Dziurka²,

Gullner³

et al. 2018

Photosynt.

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“…In the present study, the combined treatment was much more effective in the promotion and protection of pigments, compared with individual JA and NO treatments. Apart from mediating free radical scavenging, carotenoids are believed to be effectively involved in controlling photo-protection against auto-oxidation in the photosynthetic reaction center (Gururani et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Mitigation of sodium chloride toxicity inSolanum lycopersicumL. by supplementation of jasmonic acid and nitric oxide

Ahmad

Ahanger

Alyemeni

et al. 2018

Journal of Plant Interactions

149

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We investigated the effects of exogenous application of jasmonic acid (JA) and nitric oxide (NO) on growth, antioxidant metabolism, physio-biochemical attributes and metabolite accumulation, in tomato (Solanum lycopersicum L.) plants exposed to salt stress. Treating the plants with NaCl (200 mM) resulted in considerable growth inhibition in terms of biomass, relative water content, and chlorophyll content, all of which were significantly improved upon application of JA and NO under both normal and NaCl-stress treatments. Salt treatment particularly 200 mM NaCl caused an apparent increase in electrolyte leakage, lipid peroxidation, and hydrogen peroxide production, which were reduced by exogenous application of JA and NO. Salt treatment triggered the induction of antioxidant system by enhancing the activities of antioxidant enzymes like superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR). Application of JA and NO separately as well as in combination caused a significant improvement in activities of SOD, CAT, APX, and GR activities. JA and NO either applied individually or in combination boosted the flavonoid, proline and glycine betaine synthesis under NaCl treatments. In conclusion, the exogenous application of JA and NO protected tomato plants from NaCl-induced damage by up-regulating the antioxidant metabolism, osmolyte synthesis, and metabolite accumulation. ARTICLE HISTORY

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“…Osmotic stresses, including drought, substantially damage the photosynthetic machinery of plants (Gururani et al, 2015). Photosystem II (PSII) is one of the most susceptible components (Nath et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Gene expression changes in response to drought stress in Ilex paraguariensis leaves

Acevedo¹,

Ruíz²,

Sansberro³

2016

Plant Omics

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Ilex paraguariensis St. Hil. is recognized as a shade-tolerant tree, cultivated in north-eastern Argentina, south-eastern Brazil, and Paraguay. Its leaves and young shoots are industrialised and; hence, being used to prepare a traditional tea-like infusion (mate-tea) with various medicinal benefits. Under the prevailing agro-climatic conditions in NE Argentina and with the occurrence of high temperatures and scarce rains during spring or summer, I. paraguariensis plants are subjected to water stress, reducing their yield. Differential Display was used to compare differences in gene expression between stressed and unstressed (control) potted plants. We found 52 differentially expressed transcripts (DETs), analysing banding patterns of Differential Display polyacrylamide gels, in which 38 DETs were induced, and 14 DETs were repressed in response to drought. Sequence comparisons revealed that 19% of the fragments showed no homologies, whereas 40.5 % of the total number of fragments had strong similarities with database entries of known functions. The other DETs belonged to unclassified proteins or genes with unknown functions. Interestingly, 12% of the DNA sequences were related to signal transduction, and 2% of the sequences were identified as transcription factors. Approximately, 12% of the annotated sequences were involved in stress tolerance and metal homeostasis, while 7% of the DETs were associated with photosynthesis. Other groups, representing 12%, included those involved in secondary metabolism, lignin biosynthesis, cell walls and RNA stabilization/chaperone activity. When integrated with physiological data, our results suggest that the transcriptional activity of some of the studied genes could be related to the degree of drought tolerance/susceptibility of I. paraguariensis.

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Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

Cited by 613 publications

References 202 publications

Comparative studies of compatible and incompatible pepper-Tobamovirus interactions and the evaluation of effects of 24-epibrassinolide

Comparative studies of compatible and incompatible pepper-Tobamovirus interactions and the evaluation of effects of 24-epibrassinolide

Mitigation of sodium chloride toxicity inSolanum lycopersicumL. by supplementation of jasmonic acid and nitric oxide

Gene expression changes in response to drought stress in Ilex paraguariensis leaves

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