Effect of brassinosteroids on drought resistance and abscisic acid concentration in tomato under water stress

Yuan, Gaofeng; Chen, Jia; Li, Zhen; Sun, Bo; Zhang, Liping; Liu, Na; Wang, Qiaomei

doi:10.1016/j.scienta.2010.06.014

Cited by 197 publications

(116 citation statements)

References 36 publications

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“…EBR increases the activity of antioxidant enzymes to mitigate oxidative stress by reducing ROS accumulation (Abedi and Pakniyat 2010;Ramakrishna and Rao 2015). Yuan et al (2010) and Behnamnia et al (2009a) observed increases in antioxidant enzyme activities (SOD, CAT, APX and POX) after the application of 0.01 and 1 lM of EBR to Lycopersicon esculentum plants subjected to 3 and 5 days, respectively, of a water deficit.…”

Section: Discussionmentioning

confidence: 99%

“…With respect to water deficit in particular, BRs have been shown to mitigate the negative effects on gas exchange of Brassica juncea plants, increasing the photosynthetic rate, stomatal conductance and water-use efficiency (Fariduddin et al 2009). In addition, this substance also can reduce the oxidative damages due to increases in antioxidant enzyme activities in Lycopersicon esculentum plants (Yuan et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

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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“…Therefore, it is possible that plant brassinosteroids have sufficient affinity with the rat gluco-corticoid receptor protein to be connected to their signaling chain through the recognition of molecules expressed by the constitutive CaMV promoter inserted in the transformation construct. Brassinosteroids have been shown to induce tolerance to a wide range of abiotic stresses (Kagale et al, 2007;Bajguz, 2011;Sittayat et al, 2007;Arora et al, 2010a;Koh et al, 2007) through the activation of anti-oxidative stress systems (Arora et al, 2010b), as well as the enhanced synthesis of abscisic acid (Yuan et al, 2010), ethylene, salicylic acid (Divi et al, 2010), polyamines and indole-3-acetic acid (Choudhary et al, 2010(Choudhary et al, , 2011. Responses to stress in plants, moreover, are known to be activated by increased levels of auxins, which in turn determines feedback interaction with flavonoid synthetic patterns (Peer and Murphy, 2007;Lewis et al, 2011) and crosstalk with brassinosteroid transcription process (see Depuydt and Hardtke (2011) for an extensive review).…”

Section: Discussionmentioning

confidence: 99%

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Fuoco

Bogani

Capodaglio

et al. 2013

Journal of Plant Physiology

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a b s t r a c tRecently our findings have shown that the integration of the gene coding for the rat gluco-corticoid receptor (GR receptor) in Nicotiana langsdorffii plants induced morphophysiological effects in transgenic plants through the modification of their hormonal pattern. Phytohormones play a key role in plant responses to many different biotic and abiotic stresses since a modified hormonal profile up-regulates the activation of secondary metabolites involved in the response to stress. In this work transgenic GR plants and isogenic wild type genotypes were exposed to metal stress by treating them with 30 ppm cadmium(II) or 50 ppm chromium(VI). Hormonal patterns along with changes in key response related metabolites were then monitored and compared. Heavy metal up-take was found to be lower in the GR plants. The transgenic plants exhibited higher values of S-abscisic acid (S-ABA) and 3-indole acetic acid (IAA), salicylic acid and total polyphenols, chlorogenic acid and antiradical activity, compared to the untransformed wild type plants. Both Cd and Cr treatments led to an increase in hormone concentrations and secondary metabolites only in wild type plants. Analysis of the results suggests that the stress responses due to changes in the plant's hormonal system may derive from the interaction between the GR receptor and phytosteroids, which are known to play a key role in plant physiology and development.

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“…Non-stomatal effi ciency limitations of photosynthesis can be related with the photosynthetic pigments, concentration and activity of enzyme Ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCo) and use of assimilative products. Yuan et al (2010) consider as an acceptable explanation that exogenous application of BRs is increasing the capacity of carbon oxide assimilation in Calvin cycle using increased initial activity of RuBisCo. In the following experiments the BRs treatment reduced the decreasing of chlorophyll content and assimilation speed, increased effi ciency of photosystem II and activity of enzymes, such as RuBisCo, nitroreductase and glutamine synthesis (Li et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Effects of brassinosteroid on the induction of physiological changes in Helianthus annuus L. under copper stress

Filova¹,

Sytar²,

Krivosudská³

2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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FILOVÁ ANGELIKA, SYTAR OKSANA, KRIVOSUDSKÁ ELEONÓRA: Eff ects of brassinosteroid on the induction of physiological changes in Helianthus annuus L. under copper stress. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2013, LXI, No. 3, pp. 623-629 The purpose of our experiments was to consider sensitivity of the chosen 6 sunfl ower cultivars (Helianthus annuus L. cv. Belinda, cv. Codiwer, cv. ESPrim, cv. MAS 95, cv. MAS 97 and cv. Spirov) to copper ions with the possibility of elimination by means of brassinosteroids (BRs) on the ground of physiological characteristics (content of dry weight, amount of chlorophylls, proline content, Relative Water Content -RWC as well as malondialdehyde -MDA) and to show possible resistance mechanisms of this plant to copper ions. Lipid peroxidation (LP) is a biochemical marker for the free radical mediated injury. Character of changes in lipid peroxidation depends on intensity of infl uence stressor and from plant sensitivity. In leaves of experimental plants cultivars MAS 97 and SPIROV a er Cu treatment by concentration 5 mM the level of malondialdehyde (MDA) content has been increased on 11% and 30% respectively. The higher MDA content has been observed in leaves of cultivar ESPrim. In the other experimental variants under Cu treatment content of MDA was on control level which evidence about more less sensitivity these cultivars to Cu treatment. The combination of Cu + BRs has been shown MDA content in leaves of all experimental plants on control level which can evidence about protection eff ect of BRs under Cu treatment on the leaves of experimental cultivars of sunfl ower plants.

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Effect of brassinosteroids on drought resistance and abscisic acid concentration in tomato under water stress

Cited by 197 publications

References 36 publications

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

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

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Effects of brassinosteroid on the induction of physiological changes in Helianthus annuus L. under copper stress

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