Does exogenous application of 24-epibrassinolide ameliorate salt induced growth inhibition in wheat (Triticum aestivum L.)?

Shahbaz, Muhammad; Ashraf, Muhammad; Athar, Habib‐ur‐Rehman

doi:10.1007/s10725-008-9262-y

Cited by 168 publications

(104 citation statements)

References 53 publications

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“…A similar inferiority in the quantum yield of PS II was observed by Shahbaz et al (2008) in Triticum aestivum and by Hayat et al (2010) in Vigna radiata exposed to salinity.…”

Section: Discussionsupporting

confidence: 74%

Physiological and biochemical traits as tools to screen sensitive and resistant varieties of tomatoes exposed to salt stress

Fariduddin

Mir

Ahmad

2012

Braz. J. Plant Physiol.

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The present study was conducted to evaluate salt tolerance in seven different pure-line cultivars of tomato (Solanum lycopersicum L.) viz. K-21, Pusa Ruby, Pusa Gorav, Hera research, Selection N5, PKM-1 and S-22 based on several physiological and biochemical traits. Seedlings were transplanted to the pots, being exposed to different salinity levels in the form of NaCl (0, 50, 100, or 150 mM) at a 35-day stage of growth for six days. The plants exposed to salt stress presented a significant decline in growth, photosynthetic parameters, maximum quantum yield of PSII and leaf water relations, which were drastically reduced in variety S-22, while variety K-21 was the least affected. Electrolyte leakage was superior in proportion to an increase in salinity levels. Proline content and activity of antioxidant enzymes catalase, peroxidase, and superoxide dismutase were found maximum in variety K-21. Almost all the growth and physiological and biochemical traits had a significant genotypic variation, indicating that these parameters could be used as novel screening criteria for selecting the tolerant and sensitive cultivars exposed to salt stress.

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“…A similar inferiority in the quantum yield of PS II was observed by Shahbaz et al (2008) in Triticum aestivum and by Hayat et al (2010) in Vigna radiata exposed to salinity.…”

Section: Discussionsupporting

confidence: 74%

Physiological and biochemical traits as tools to screen sensitive and resistant varieties of tomatoes exposed to salt stress

Fariduddin

Mir

Ahmad

2012

Braz. J. Plant Physiol.

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“…This response may be associated to an effect of BRs on transcription and/or translation in the synthesis of pigments. Likewise, 24-EBR significantly enhanced the growth and photosynthetic capacity of salt-tolerant and salt-sensitive wheat plants [90]. As above, although exogenous BRs has been reported to improve the plant resistance to several abiotic stresses, there are controversies about the mode of action of endogenous BRs in plant stress responses.…”

Section: Effect Of Brs On Plant Growth Responses Under Drought and Samentioning

confidence: 82%

Alterations of Endogenous Hormonal Levels in Plants under Drought and Salinity

Llanes¹,

Andrade²,

Alemano³

et al. 2016

AJPS

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The phytohormones are pivotal chemical messengers produced within the plant that regulate its growth and development, and responses to environmental stimuli. Drought and salinity are adverse environmental factors that disturb the plant hormonal balance. Accordingly, these hormonal fluctuations modify the cellular dynamic and hence they play a central role in regulating plant growth responses to abiotic stresses such as drought and salinity. The present review gives an update about the alterations of endogenous phytohormones such as abscisic acid (ABA), auxins (Aux), cytokinins (CKs), ethylene (ET), gibberellins (GAs), jasmonates (JAs), salicylic acid (SA), brassinosteroids (BRs), strigolactones (SLs) and nitric oxide (NO) that occur as part of the adaptative responses of plant against drought and salt stresses. Better understanding of the endogenous hormonal changes during the plant response to both abiotic stresses will contribute, in part, to the development of stress-tolerant plants.

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“…In parallel, EBR improved the antioxidant system, mitigating the accumulation of ROS, in addition to reducing the damage caused to the membranes and photosynthetic pigments. Plants treated with EBR presented greater accumulation of biomass as a result of the increased photosynthetic rates triggered by the efficient energy absorption and proper stomatal regulation (Arora et al 2008;Shahbaz et al 2008). Barbosa et al (2015) reported a reduction in the biomass of Saccharum spp.…”

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

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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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Does exogenous application of 24-epibrassinolide ameliorate salt induced growth inhibition in wheat (Triticum aestivum L.)?

Cited by 168 publications

References 53 publications

Physiological and biochemical traits as tools to screen sensitive and resistant varieties of tomatoes exposed to salt stress

Physiological and biochemical traits as tools to screen sensitive and resistant varieties of tomatoes exposed to salt stress

Alterations of Endogenous Hormonal Levels in Plants under Drought and Salinity

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

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