Effect of drought and heat stresses on photosynthesis, pigments,  and xanthophyll cycle in alfalfa (Medicago sativa L.)

Xu, Chenghua; He, Cao; Wang, Y.J.; Bi, Yu; Jiang, Huixin

doi:10.32615/ps.2020.073

Cited by 17 publications

(11 citation statements)

References 76 publications

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“…From the literature, there are controversial results on the effect of water stress on carotenoids. From our results, an increase in xanthophylls was observed, similar to the literature papers where an increment in the xanthophyll cycle components was demonstrated in different plant species under stress conditions [ 25 , 50 , 51 ]. This cycle consists of the enzymatic interconversions of violaxanthin, antheraxanthin, and zeaxanthin in the thylakoid membrane.…”

Section: Resultssupporting

confidence: 91%

Influence of Drought Stress on Physiological Responses and Bioactive Compounds in Chicory (Cichorium intybus L.): Opportunity for a Sustainable Agriculture

Delfine

Fratianni

D’Agostino

et al. 2022

Foods

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Food production from agriculture depends on irrigation, mainly in poor rainfall zones, such as the Mediterranean region. Chicory is an important food crop component of the Mediterranean diet. Considering the increasing incidence of drought due to climate change, this study was carried out in order to investigate the effect of moderate drought stress on photosynthesis, leaf gaseous exchange, growth, and tocol and carotenoid composition of chicory under field conditions. Chicory was subjected to rainfed condition stress in a randomized block design. At 50 days of treatment, drought stress caused about 48% reduction in dry matter, 30% in leaf relative water content, and about 25% in photosynthetic rate and stomatal conductance, whereas mesophyll conductance was not affected. A strong relationship between photosynthetic rates and stomatal conductance was observed. In the rainfed chicory, at the end of treatment, an increase (about 20%) in carotenoid and tocopherol content was found, thus, giving further insight into the positive effect of moderate drought stress on these compounds. This finding suggests that under proper rainfed conditions, it is possible to increase and save the quality of dry chicory, although yield loss occurs.

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Section: Resultssupporting

confidence: 91%

Influence of Drought Stress on Physiological Responses and Bioactive Compounds in Chicory (Cichorium intybus L.): Opportunity for a Sustainable Agriculture

Delfine

Fratianni

D’Agostino

et al. 2022

Foods

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“…Fresh leaf material (0.5 g) was obtained from the WT and BnaMAPK1- OE seedlings after 0, 7, 14, 21, and 28 days of the shading treatment. Using the slightly modified enzyme extraction method of Xu et al, (2020) , the material was homogenized with 6 ml of cooled extraction buffer containing 100 mM Tris–HCl (pH 7.8), 10 mM MgCl 2 , 1 mM EDTA, 20 mM β-hydroxy-1-ethanethiol, and 2% (m/v) polyvinyl pyrrolidone at 0°C–4°C. The product was centrifuged at 14,000× g for 20 min at 4°C, and the supernatant was used for Rubisco activity measurement.…”

Section: Methodsmentioning

confidence: 99%

Rapeseed (Brassica napus) Mitogen-Activated Protein Kinase 1 Enhances Shading Tolerance by Regulating the Photosynthesis Capability of Photosystem II

et al. 2022

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Rapeseed (Brassica napus) is the third-largest source of vegetable oil in the world with an edible, medicinal, and ornamental value. However, insufficient light or high planting density directly affects its growth, development, yield, and quality. Mitogen-activated protein kinases (MAPKs) are serine/threonine protein kinases that play key roles in regulating the responses to biotic and abiotic stresses in plants. In this study, we found that the promoter of BnaMAPK1 contained several light-responsive elements (including the AT1-motif, G-Box, and TCT-motif), consistent with its shading stress-induced upregulation. Compared with the wild type under shading stress, BnaMAPK1-overexpressing plants showed higher light capture efficiency and carbon assimilation capacity, enhancing their shading tolerance. Using RNA sequencing, we systematically investigated the function of BnaMAPK1 in shading stress on photosynthetic structure, Calvin cycle, and light-driven electron transport. Notably, numerous genes encoding light-harvesting chlorophyll a/b-binding proteins (BnaLHCBs) in photosystem II-light-harvesting complex (LHC) II supercomplex were significantly downregulated in the BnaMAPK1-overexpressing lines relative to the wild type under shading stress. Combining RNA sequencing and yeast library screening, a candidate interaction partner of BnaMAPK1 regulating in shading stress, BnaLHCB3, was obtained. Moreover, yeast two-hybrid and split-luciferase complementation assays confirmed the physical interaction relationship between BnaLHCB3 and BnaMAPK1, suggesting that BnaMAPK1 may involve in stabilizing the photosystem II–LHC II supercomplex. Taken together, our results demonstrate that BnaMAPK1 positively regulates photosynthesis capability to respond to shading stress in rapeseed, possibly by controlling antenna proteins complex in photosystem II, and could provide valuable information for further breeding for rapeseed stress tolerance.

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“…C.F.Liang & A.R.Ferguson) (C3) under DS (35% field capacity for 9 days) relative to control plants (Liang et al, 2019). Xu et al (2020) noted that DS (water withheld for 12 days) decreased photosynthetic pigments (violaxanthin and carotenoid) in two alfalfa ( Medicago sativa L.) (C3) varieties (Algonguin and Deqin) that showed adaptive mechanism, not destructive mechanisms. A positive linear relationship between xanthophyll and heat dissipation was noted, suggesting a photoprotective role of xanthophyll under DS.…”

Section: Biochemistry Of Photosynthesismentioning

confidence: 99%

“…(C3), possibly due to lower carbon availability and disturbed photosynthates. Xu et al (2020) characterized molecular and physiological aspects of isoprene action in transgenic Arabidopsis lines by overexpressing a monocot isoprene synthase gene from giant reed ( Arundo donax L.) (C3)—isoprene had a strong effect on ABA‐mediated signalling at different tissue‐specific, spatial and temporal scales. According to Haworth et al (2017), isoprene increased significantly under moderate DS, activating the underlying methionine and methylerythritol phosphate pathways that play crucial roles in DS tolerance and preserving photosynthetic capacity once the stress is relieved.…”

Section: Improving Photosynthesis Under Drought Stressmentioning

confidence: 99%

Plant photosynthetic responses under drought stress: Effects and management

Zahra

Hafeez

Kausar

et al. 2023

J Agronomy Crop Science

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Balanced photosynthesis is essential for improved plant survival and agricultural benefits in terms of biomass and yield. Photosynthesis is the hub of energy metabolism in plants; however, drought stress (DS) strongly perturbs photosynthetic efficiency due to biochemical and diffusive limitations that reduce key photosynthetic components and close stomata. This review describes photosynthetic responses, chloroplast retrograde signalling, and genetic imprints that curtail DS damage to photosynthetic machinery. While stomatal closure, disrupted photosynthetic systems, over‐reduced electron transport rates (ETR), partial hindrance of the Calvin cycle, and reduced pigment contents strongly affect the repertoire of photosynthetic processes under DS, chloroplast retrograde signalling also has a plausible role in preserving photosynthetic capacity. Progress in agronomic, genetic engineering approaches and isoprene regulation would help to rescue photosynthetic apparatus under DS.

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Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.)

Cited by 17 publications

References 76 publications

Influence of Drought Stress on Physiological Responses and Bioactive Compounds in Chicory (Cichorium intybus L.): Opportunity for a Sustainable Agriculture

Influence of Drought Stress on Physiological Responses and Bioactive Compounds in Chicory (Cichorium intybus L.): Opportunity for a Sustainable Agriculture

Rapeseed (Brassica napus) Mitogen-Activated Protein Kinase 1 Enhances Shading Tolerance by Regulating the Photosynthesis Capability of Photosystem II

Plant photosynthetic responses under drought stress: Effects and management

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