Comparative Effects of Brassinosteroid and Brassinosteroid Mimic on Improving Photosynthesis, Lipid Peroxidation, and Rice Seed Set under Heat Stress

Thussagunpanit, Jutiporn; Jutamanee, Kanapol; Kaveeta, Lily; Chai-arree, Witith; Pankean, Porn; Homvisasevongsa, Sureeporn; Suksamrarn, Apichart

doi:10.1007/s00344-014-9467-4

Cited by 54 publications

(32 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pretreatment with 24-epibrassinolide (1 mg dm -3 ) reduced MDA accumulation by 35 %. A similar effect was observed in rice plants grown at high d/n temperatures of 40/30 °C for 7 d (Thussagunpanit et al 2015b). In eggplants at d/n temperatures of 43/38 °C (8 d), 0.1 μM 24-epibrassinolide reduced the MDA content by 16 % compared to plants that were not treated (Wu et al 2014b).…”

Section: The Structure and Properties Of Cell Membranessupporting

confidence: 70%

Physiological and molecular mechanisms of brassinosteroid-induced tolerance to high and low temperature in plants

Sadura

Janeczko

2018

Biol Plant

View full text Add to dashboard Cite

Brassinosteroids (BRs) are plant hormones that were isolated for the first time in the 1970s. This group currently includes more than 70 compounds that differ in their structure and physiological activity. BRs are present in plants in a free form or in the form of conjugates. BRs are known as plant growth regulators, but they also play a role in the plant response to environmental stresses. In the case of plants that are exposed to low/high temperature, exogenous BRs can counteract growth inhibition and reduce biomass losses as well as increase plant survival. BRs show a multidirectional activity in regulating the metabolism of plants exposed to extreme temperatures. The following BRs actions can be distinguished: changes in membrane physicochemical properties, regulation of the expression of selected genes (including stress-responsive genes), as well as indirect effects on metabolism through other hormones or signalling molecules (such as hydrogen peroxide). This review summarizes the current knowledge about the effects of BRs on the physiological and biochemical processes that occur in plants during exposure to low or high temperatures.

show abstract

Section: The Structure and Properties Of Cell Membranessupporting

confidence: 70%

Physiological and molecular mechanisms of brassinosteroid-induced tolerance to high and low temperature in plants

Sadura

Janeczko

2018

Biol Plant

View full text Add to dashboard Cite

show abstract

“…Plants treated with EBR exhibited increases in ETR and q P , which are related to higher energy absorption of photons and subsequent increased flow of energy for the excitation of electrons accepted by plastoquinone (Buonasera et al 2011). Thussagunpanit et al (2015a) studied the action mechanisms of EBR in Oryza sativa plants and reported increases in U PSII after EBR application. Research conducted by Li et al (2015) showed that EBR increases the proportion of open PSII reaction centres, improving the efficiency of the capture of light energy for the electron transport chain.…”

Section: Discussionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…In grape seedlings (V. vinifera L.) with 10% PEG stress, the application of 0.105-0.42 µM 24-epiBL significantly increased the chlorophyll content (Chl a, Chl b, and Chl), maximal fluorescence, F v /F m , and NPQ, to improve drought tolerance [38]. Thussagunpanit and co-workers sprayed the foliage of rice (Oryza sativa L.) with 0.1 µM 24-epiBL and reported that 24-epiBL improved P n , G s , F v /F m , and Chl a, Chl b, and Chl contents with a reduction in C i to protect the plants from heat stress (47 • C) [39].…”

Section: Photosynthesismentioning

confidence: 99%

The Positive Effect of Different 24-epiBL Pretreatments on Salinity Tolerance in Robinia pseudoacacia L. Seedlings

Yue

Zhang

et al. 2018

Forests

View full text Add to dashboard Cite

As a brassinosteroid (BR), 24-epibrassinolide (24-epiBL) has been widely used to enhance the resistance of plants to multiple stresses, including salinity. Black locust (Robinia pseudoacacia L.) is a common species in degraded soils. In the current study, plants were pretreated with three levels of 24-epiBL (0.21, 0.62, or 1.04 µM) by either soaking seeds during the germination phase (Sew), foliar spraying (Spw), or root dipping (Diw) at the age of 6 months. The plants were exposed to salt stress (100 and 200 mM NaCl) via automatic drip-feeding (water content~40%) for 45 days after each treatment. Increased salinity resulted in a decrease in net photosynthesis rate (P n ), stomatal conductance (G s ), intercellular:ambient CO 2 concentration ratio (C i /C a ), water-use efficiency (WUE i ), and maximum quantum yield of photosystem II (PSII) (F v /F m ). Non-photochemical quenching (NPQ) and thermal dissipation (H d ) were elevated under stress, which accompanied the reduction in the membrane steady index (MSI), water content (RWC), and pigment concentration (Chl a, Chl b, and Chl). Indicators of oxidative stress (i.e., malondialdehyde (MDA) and antioxidant enzymes (peroxidase (POD) and superoxide dismutase (SOD)) in leaves and Na + content in chloroplasts increased accompanied by a reduction in chloroplastid K + and Ca 2+ . At 200 mM NaCl, the chloroplast and thylakoid ultrastructures were severely disrupted. Exogenous 24-epiBL improved MSI, RWC, K + , and Ca 2+ content, reduced Na + levels, maintained chloroplast and thylakoid membrane structures, and enhanced the antioxidant ability in leaves. 24-epiBL also substantially alleviated stress-induced limitations of photosynthetic ability, reflected by elevated chlorophyll fluorescence, pigment levels, and P n . The positive effects of alleviating salt stress in R. pseudoacacia seedlings in terms of treatment application was Diw > Sew > Spw, and the most positive impacts were seen with 1.04 µM 24-epiBL. These results provide diverse choice for 24-epiBL usage to defend against NaCl stress of a plant.

show abstract

Comparative Effects of Brassinosteroid and Brassinosteroid Mimic on Improving Photosynthesis, Lipid Peroxidation, and Rice Seed Set under Heat Stress

Cited by 54 publications

References 57 publications

Physiological and molecular mechanisms of brassinosteroid-induced tolerance to high and low temperature in plants

Physiological and molecular mechanisms of brassinosteroid-induced tolerance to high and low temperature in plants

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

The Positive Effect of Different 24-epiBL Pretreatments on Salinity Tolerance in Robinia pseudoacacia L. Seedlings

Contact Info

Product

Resources

About