Effects of 2,4-epibrassinolide on photosynthesis and Rubisco activase gene expression in Triticum aestivum L. seedlings under a combination of drought and heat stress

Zhao, Guangwei; Xu, Hongbo; Zhang, Pengju; Su, Xiaoyu; Zhao, Hang

doi:10.1007/s10725-016-0214-7

Cited by 77 publications

(48 citation statements)

References 42 publications

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“…Moreover, BR can regulate the combination of chlorophyll molecule (by regulating chlorophyllase activity) with membrane protein and maintain stability of the thylakoid membranes [ 38 , 43 ]. Photosynthesis is the basis of plant growth and development, where plant convert light energy to chemical energy (carbohydrates, such as sugars) that used in various developmental activities [ 45 , 46 ]. Chlorophyll is one of the basic units of photosynthesis and appropriate levels of chlorophyll are required for proper photosynthesis [ 3 ], however, chlorophyll is very sensitive to abiotic stress.…”

Section: Physiological Mechanisms Of Br In Plants Under Stress Conditmentioning

confidence: 99%

“…Moreover, BR regulate the Rubisco activase ( RCA ) gene, which plays a key role in photosynthesis, under drought and heat stress in wheat. In addition, BR significantly increases the activities of antioxidant enzymes and the process of photosynthesis [ 45 ], also BR-treated seedlings increased in: CO 2 assimilation and quantum yield of photosystem II (PSII); ribulose-1, 5-bisphosphate carboxylase/oxygenase (Rubisco) activities and expression of Rubisco large subunit ( rbcL ) and Rubisco small subunit ( rbcS ) genes to increase photosynthetic capacity [ 1 ]. These findings suggest the positive role of BR in photosynthesis [ 1 ].…”

Section: Physiological Mechanisms Of Br In Plants Under Stress Conditmentioning

confidence: 99%

“…4 ) [ 2 ]. Thus, BR promote accumulation of chlorophylls and photosynthetic capacity by regulating a variety of enzymes including chlorophyllase and Rubisco, transcript levels of encoded genes involved chlorophyll and photosynthesis under stress [ 1 , 2 , 45 , 46 ].…”

Section: Physiological Mechanisms Of Br In Plants Under Stress Conditmentioning

confidence: 99%

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The physiological and molecular mechanism of brassinosteroid in response to stress: a review

et al. 2018

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The negative effects of environmental stresses, such as low temperature, high temperature, salinity, drought, heavy metal stress, and biotic stress significantly decrease crop productivity. Plant hormones are currently being used to induce stress tolerance in a variety of plants. Brassinosteroids (commonly known as BR) are a group of phytohormones that regulate a wide range of biological processes that lead to tolerance of various stresses in plants. BR stimulate BRASSINAZOLE RESISTANCE 1 (BZR1)/BRI1-EMS SUPPRESSOR 1 (BES1), transcription factors that activate thousands of BR-targeted genes. BR regulate antioxidant enzyme activities, chlorophyll contents, photosynthetic capacity, and carbohydrate metabolism to increase plant growth under stress. Mutants with BR defects have shortened root and shoot developments. Exogenous BR application increases the biosynthesis of endogenous hormones such as indole-3-acetic acid, abscisic acid, jasmonic acid, zeatin riboside, brassinosteroids (BR), and isopentenyl adenosine, and gibberellin (GA) and regulates signal transduction pathways to stimulate stress tolerance. This review will describe advancements in knowledge of BR and their roles in response to different stress conditions in plants.

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Section: Physiological Mechanisms Of Br In Plants Under Stress Conditmentioning

confidence: 99%

Section: Physiological Mechanisms Of Br In Plants Under Stress Conditmentioning

confidence: 99%

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The physiological and molecular mechanism of brassinosteroid in response to stress: a review

et al. 2018

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“…6 E). It is long known that the activation state of Rubisco is regulated by RCA via the maintenance of Rubisco catalytic sites 58 , 59 . Consequently, PpRCA activity might play an important role in the regulation of PpRbcS genes and photosynthetic carbon assimilation.…”

Section: Discussionmentioning

confidence: 99%

Comparative physiological and transcriptomic analysis of pear leaves under distinct training systems

Liu

Lin

et al. 2020

Sci Rep

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Canopy architecture is critical in determining the light interception and distribution, and subsequently the photosynthetic efficiency and productivity. However, the physiological responses and molecular mechanisms by which pear canopy architectural traits impact on photosynthesis remain poorly understood. Here, physiological investigations coupled with comparative transcriptomic analyses were performed in pear leaves under distinct training systems. Compared with traditional freestanding system, flat-type trellis system (DP) showed higher net photosynthetic rate (PN) levels at the most time points throughout the entire monitored period, especially for the interior of the canopy in sunny side. Gene ontology analysis revealed that photosynthesis, carbohydrate derivative catabolic process and fatty acid metabolic process were over-represented in leaves of DP system with open-canopy characteristics. Weighted gene co-expression network analysis uncovered a significant network module positive correlated with PN value. The hub genes (PpFKF1 and PpPRR5) of the module were enriched in circadian rhythm pathway, suggesting a functional role for circadian clock genes in mediating photosynthetic performance under distinct training systems. These results draw a link between pear photosynthetic response and specific canopy architectural traits, and highlight light harvesting and circadian clock network as potential targets for the input signals from the fluctuating light availability under distinct training systems.

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“…Yuan et al [8] reported that the application of 2,4-Epibrassinolide (EBL) alleviated Ca(NO 3 ) 2 stress in cucumber plants by regulating mineral nutrients uptake and distribution. Zhao et al [9] also found that exogenous EBR application ameliorated the inhibitory effects of photosynthesis, antioxidant enzyme activity and Rubisco activase (RCA) gene expression in Triticum aestivum induced by a combination of drought and heat stress. The effect of BR on plant growth and development processes depends on the concentration.…”

Section: Introductionmentioning

confidence: 98%

Nitric oxide is involved in the brassinolide-induced adventitious root development in cucumber

Liao

et al. 2020

BMC Plant Biol

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Background: Brassinolide (BR), as a new type of plant hormones, is involved in the processes of plant growth and stress response. Previous studies have reported the roles of BR in regulating plant developmental processes and also response tolerance to abiotic stresses in plants. The main purpose of our study was to explore whether nitric oxide (NO) plays a role in the process of BR-induced adventitious root formation in cucumber (Cucumis sativus L.).Results: Exogenous application of 1 μM BR significantly promoted adventitious rooting, while high concentrations of BR (2-8 μM) effectively inhibited adventitious rooting. NO donor (S-nitroso-N-acerylpenicillamine, SNAP) promoted the occurrence of adventitious roots. Simultaneously, BR and SNAP applied together significantly promoted adventitious rooting and the combined effect was superior to the application of BR or SNAP alone. Moreover, NO scavenger (c-PTIO) and inhibitors (L-NAME and Tungstate) inhibited the positive effects of BR on adventitious rooting. BR at 1 μM also increased endogenous NO content, NO synthase (NOS-like) and Nitrate reductase (NR) activities, while BRz (a specific BR biosynthesis inhibitor) decreased these effects. In addition, the relative expression level of NR was up-regulated by BR and SNAP, whereas BRz down-regulated it. The application of NO inhibitor (Tungstate) in BR also inhibited the up-regulation of NR.Conclusion: BR promoted the formation of adventitious roots by inducing the production of endogenous NO in cucumber.

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Effects of 2,4-epibrassinolide on photosynthesis and Rubisco activase gene expression in Triticum aestivum L. seedlings under a combination of drought and heat stress

Abstract: the larger subunit of RCA (45-46 kDa), which is more thermostable and increased in response to moderate heat stress, and the smaller isoform (38-39 kDa) of RCA may play important roles in maintaining the photosynthetic capability by EBR under stress conditions.

Cited by 77 publications

References 42 publications

The physiological and molecular mechanism of brassinosteroid in response to stress: a review

The physiological and molecular mechanism of brassinosteroid in response to stress: a review

Comparative physiological and transcriptomic analysis of pear leaves under distinct training systems

Nitric oxide is involved in the brassinolide-induced adventitious root development in cucumber

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