Effects of brassinolide on drought resistance of Xanthoceras sorbifolia seedlings under water stress

Li, Kai Rong; Feng, Chengwen

doi:10.1007/s11738-010-0661-0

Cited by 44 publications

(25 citation statements)

References 33 publications

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“…The observation that EBL treatment increased aboveground DW in both WW and moderately WS plants agrees with previous research in rice seedlings under drought (Farooq et al 2009) and in maize under WW and water-deficit conditions (Anjum et al 2011). BRs application also increased osmotic adjustment (Li and Feng 2011), antioxidant enzyme activity and leaf gas exchange (Zhang et al 2008;Farooq et al 2009) which led to better drought adaptation and enhanced growth in waterstressed maize and rice. In both the WW and moderately WS plants, the EBL enhanced leaf area and leaf DW, increasing carbon assimilation in the vegetative stage, and then increased pod DW, filled pod number, grain number and grain DW in the reproductive stage.…”

Section: Ebl Increased the Growth And Grain Yield In Grass Peasupporting

confidence: 89%

“…Many studies have reported that exogenous application of BRs can mitigate stress-induced damage and increase the adaptive capability of plants to water stress, thereby improving economic traits such as grain yield (Krishna 2003;Anjum et al 2011;Li and Feng 2011). Foliar application of 0.1 mg L -1 brassinolide to maize subjected to drought increased plant height, leaf area and seedling dry weight under drought (Anjum et al 2011), while 1-year-old Xanthoceras sorbifolia B. seedlings had significantly increased leaf water content, relative water content and free proline content under water stress conditions when the roots were soaked with 0.2 mg L -1 brassinolide (Li and Feng 2011). Zhang et al (2011) reported that BR induced the biosynthesis of abscisic acid (ABA) in maize under oxidative stress.…”

Section: Introductionmentioning

confidence: 99%

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24-epibrassinolide increases growth, grain yield and β-ODAP production in seeds of well-watered and moderately water-stressed grass pea

et al. 2015

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24-epibrassinolide (EBL) is a growth regulator that promotes crop growth and yield, especially under water stress, but its effect on grass pea (Lathyrus sativus L.), a legume crop widely recognized as adapted to rainfed environments, is unknown. The aim of the present study was to investigate the effect of exogenously-applied EBL on growth, yield and accumulation of b-N-oxalyl-L-a, bdiaminopropionic acid (b-ODAP)-a neurotoxin that can induce lathyrism in animals and humans-in grass pea under well-watered (WW) and water-stressed conditions. The first experiment conducted in a growth chamber showed that EBL application increased plant height and leaf area of well-watered [WW, 85 % field capacity (FC)] grass pea seedlings and in those in which the soil dried from 85 to 30 % FC. In two pot experiments conducted under a rainout shelter, three water regimes-soil water contents maintained at (1) 85 or 80 % FC, (2) 50 % FC, and (3) 35 % FC-were imposed. In the first rainout shelter experiment, root/soil drenching with EBL significantly increased aboveground dry weight (DW) and water use efficiency (WUE) compared with plants without EBL at 85 and 50 % FC, but did not significantly affect grain yield. In a second rainout shelter experiment, water treatments were imposed from the vegetative phase to maturity and EBL treatment significantly increased aboveground DW, grain yield, b-ODAP concentration and amount, and WUE in the 80 and 50 % FC water regimes. It is concluded that exogenously-applied EBL can stimulate growth and WUE in grass pea when WW and moderately water stressed, and also stimulates b-ODAP production such that the concentration in the grain is similar or even higher.

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Section: Ebl Increased the Growth And Grain Yield In Grass Peasupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

24-epibrassinolide increases growth, grain yield and β-ODAP production in seeds of well-watered and moderately water-stressed grass pea

et al. 2015

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“…Determination of proline and soluble sugar contents. Proline content was determined according to the method of Li and Feng (2011). Briefly, leaves (0.1 g) were homogenized with 5 mL 3% sulfosalicylic acid and boiled at 100°C for 10 min.…”

Section: Methodsmentioning

confidence: 99%

Foliar Application of 24-Epibrassinolide Improved Salt Stress Tolerance of Perennial Ryegrass

Sun

Han

et al. 2015

horts

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Perennial ryegrass (Lolium perenne L.) is a widely used turfgrass. In this study, the effect of exogenously applied 24-epibrassinolide (EBR) on salt stress tolerance of perennial ryegrass was investigated. The results indicated that pretreatment with four concentrations of EBR (0, 0.1, 10, 1000 nM) improved salt tolerance of perennial ryegrass. Exogenous EBR treatment decreased electrolyte leakage (EL), malondialdehyde (MDA), and H2O2 contents and enhanced the leaf relative water content (RWC), proline, soluble sugar, and soluble protein content under salt stress condition. Meanwhile, EBR reduced the accumulation of Na+ and increased K+, Ca2+, and Mg2+ contents in leaves after salt treatment. Moreover, EBR pretreatment also increased superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) activity, as well as ascorbic acid (AsA) and glutathione contents. These results suggested that EBR improved salt tolerance by enhancing osmotic adjustment and antioxidant defense systems in perennial ryegrass.

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“…BRs, a class of phytohormones characterized as natural substances essential to plant growth and development (Khripach et al 2000;Li and Feng 2011), play a role in the regulation of metabolic processes, such as respiration (Derevyanchuk et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Brassinosteroids improve photosystem II efficiency, gas exchange, antioxidant enzymes and growth of cowpea plants exposed to water deficit

Lima

Lobato

2017

Physiol Mol Biol Plants

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Water deficit is considered the main abiotic stress that limits agricultural production worldwide. Brassinosteroids (BRs) are natural substances that play roles in plant tolerance against abiotic stresses, including water deficit. This research aims to determine whether BRs can mitigate the negative effects caused by water deficiency, revealing how BRs act and their possible contribution to increased tolerance of cowpea plants to water deficit. The experiment was a factorial design with the factors completely randomised, with two water conditions (control and water deficit) and three levels of brassinosteroids (0, 50 and 100 nM 24-epibrassinolide; EBR is an active BRs). Plants sprayed with 100 nM EBR under the water deficit presented significant increases in U PSII , q P and ETR compared with plants subjected to the water deficit without EBR. With respect to gas exchange, P N , E and g s exhibited significant reductions after water deficit, but application of 100 nM EBR caused increases in these variables of 96, 24 and 33%, respectively, compared to the water deficit ? 0 nM EBR treatment. To antioxidant enzymes, EBR resulted in increases in SOD, CAT, APX and POX, indicating that EBR acts on the antioxidant system, reducing cell damage. The water deficit caused significant reductions in Chl a, Chl b and total Chl, while plants sprayed with 100 nM EBR showed significant increases of 26, 58 and 33% in Chl a, Chl b and total Chl, respectively. This study revealed that EBR improves photosystem II efficiency, inducing increases in U PSII , q P and ETR. This substance also mitigated the negative effects on gas exchange and growth induced by the water deficit. Increases in SOD, CAT, APX and POX of plants treated with EBR indicate that this steroid clearly increased the tolerance to the water deficit, reducing reactive oxygen species, cell damage, and maintaining the photosynthetic pigments. Additionally, 100 nM EBR resulted in a better dose-response of cowpea plants exposed to the water deficit.

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Effects of brassinolide on drought resistance of Xanthoceras sorbifolia seedlings under water stress

Cited by 44 publications

References 33 publications

24-epibrassinolide increases growth, grain yield and β-ODAP production in seeds of well-watered and moderately water-stressed grass pea

24-epibrassinolide increases growth, grain yield and β-ODAP production in seeds of well-watered and moderately water-stressed grass pea

Foliar Application of 24-Epibrassinolide Improved Salt Stress Tolerance of Perennial Ryegrass

Brassinosteroids improve photosystem II efficiency, gas exchange, antioxidant enzymes and growth of cowpea plants exposed to water deficit

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