Redox homeostasis, antioxidant defense, and methylglyoxal detoxification as markers for salt tolerance in Pokkali rice

El-Shabrawi, Hattem M.; Kumar, Bhumesh; Kaul, Tanushri; Reddy, Malireddy K.; Singla‐Pareek, Sneh L.; Sopory, Sudhir K.

doi:10.1007/s00709-010-0144-6

Cited by 251 publications

(121 citation statements)

References 42 publications

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“…Research findings have demonstrated that GSH acts as a methylglyoxal detoxifier that confers salt stress tolerance (Singla-Pareek et al 2003). An experiment by El-Shabrawi et al (2010) conducted with Pokkali (salt tolerant) and IR64 (salt sensitive) rice cultivars, indicated that the GSH level and both Gly I and II activities were significantly higher in Pokkali than in IR64. When both cultivars were exposed to salt stress, Pokkali showed higher GSH/GSSG ratio and ascorbate (AsA)/dehydroascorbate (DHA) ratio, together with higher activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), and GPX, when compared to IR64.…”

Section: Glutathione-induced Abiotic Stress Tolerance Salinitymentioning

confidence: 99%

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Hasanuzzaman

Nahar

Anee

et al. 2017

Physiol Mol Biol Plants

541

284

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Glutathione (GSH; c-glutamyl-cysteinyl-glycine) is a small intracellular thiol molecule which is considered as a strong non-enzymatic antioxidant. Glutathione regulates multiple metabolic functions; for example, it protects membranes by maintaining the reduced state of both a-tocopherol and zeaxanthin, it prevents the oxidative denaturation of proteins under stress conditions by protecting their thiol groups, and it serves as a substrate for both glutathione peroxidase and glutathione S-transferase. By acting as a precursor of phytochelatins, GSH helps in the chelating of toxic metals/metalloids which are then transported and sequestered in the vacuole. The glyoxalase pathway (consisting of glyoxalase I and glyoxalase II enzymes) for detoxification of methylglyoxal, a cytotoxic molecule, also requires GSH in the first reaction step. For these reasons, much attention has recently been directed to elucidation of the role of this molecule in conferring tolerance to abiotic stress. Recently, this molecule has drawn much attention because of its interaction with other signaling molecules and phytohormones. In this review, we have discussed the recent progress in GSH biosynthesis, metabolism and its role in abiotic stress tolerance.

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Section: Glutathione-induced Abiotic Stress Tolerance Salinitymentioning

confidence: 99%

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Hasanuzzaman

Nahar

Anee

et al. 2017

Physiol Mol Biol Plants

541

284

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“…The concentration of ROSs is maintained at non-toxic levels by means of antioxidant mechanisms to avoid damages (Moller;Jensen;Hansson, 2007), and plants respond to the increase of ROSs with acceleration of enzymatic and non-enzymatic antioxidant processes (Alscher, Erturk;Health, 2002). Plants developed a complex antioxidant system for restricting the harmful effects of the ROSs (El-Shabrawi et al, 2010), which constitutes the primary defense against free radicals generated under stress conditions. For example, the superoxide dismutase (SOD) enzyme catalyzes dismutation of the superoxide radical (O 2…”

Section: Introductionmentioning

confidence: 99%

Enzyme activity in soybean seeds produced under foliar application of manganese

et al. 2014

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Several factors affect the quality of soybean seeds, including the mineral nutrition of plants. Manganese (Mn) is an important nutrient because it has as one of its functions the enzyme activation. The aim of this study was to evaluate enzyme activity in seeds of soybean cultivars produced with foliar application of different doses of Mn. The experiment was conducted at the Universidade Federal de Lavras (UFLA) (Federal University of Lavras) in randomized blocks with three replications and 4 x 4 x 2 factorial arrangement consisting of four soybean cultivars, two conventional and its genetically modified RR derived (BRS Celeste and BRS Baliza RR; BRSGO Jataí and BRS Silvânia RR), four doses of Mn via foliar application (0; 200; 400 and 600 g Mn ha -1 ) and two stages of application (R 1 or R 3 ). In the seeds, the expressions of the enzymes esterase (EST), malate dehydrogenase (MDH), alcohol dehydrogenase (ADH), superoxide dismutase (SOD), peroxidase (PRX) and isocitratelyase (ICL) were determined. For evaluation of physiological quality, the germination test and emergence speed index (ESI) were performed. The Mn content in the seeds was also determined. The expression of the enzymes EST, SOD, PRX and ICL in soybean seeds are affected by foliar application of Mn, regardless of the stages of application. In the seeds of the cultivars that showed better physiological quality, Celeste and Baliza RR, greater expressions of the enzymes ADH and ICL and lower expressions of MDH and of PRX were observed.Index terms: Enzymes, Glycine max, quality, micronutrients. RESUMODiversos fatores afetam a qualidade das sementes de soja, dentre eles a nutrição mineral das plantas. O manganês (Mn) é um nutriente importante por ter como uma de suas funções a ativação enzimática. O objetivo, neste trabalho, foi avaliar a atividade enzimática em sementes de cultivares de soja, produzidas com aplicação foliar de diferentes doses de Mn. O experimento foi conduzido na Universidade Federal de Lavras (UFLA), em blocos casualizados, com três repetições e esquema fatorial 4 x 4 x 2, sendo quatro cultivares de soja, duas convencionais e suas derivadas transgênicas RR (BRS Celeste e BRS Baliza RR; BRSGO Jataí e BRS Silvânia RR), quatro doses de Mn via foliar (0; 200; 400 e 600 g Mn ha -1 ) e dois estádios de aplicação (R 1 ou R 3 ). Nas sementes, foram determinadas as expressões das enzimas esterase (EST), malato desidrogenase (MDH), álcool desidrogenase (ADH), superóxido dismutase (SOD), peroxidase (PRX) e isocitrato liase (ICL). Para avaliação da qualidade fisiológica foram realizados os testes de Germinação e de Índice de velocidade de emergência (IVE). Determinou-se, também, o teor de Mn nas sementes. A expressão das enzimas EST, SOD, PRX e ICL em sementes de soja são influenciadas pela aplicação de Mn via foliar, independente do estádio de aplicação. Nas sementes das cultivares, as quais apresentaram melhor qualidade fisiológica, Celeste e Baliza RR, foram constatadas maiores expressões das enzimas ADH e ICL e menores expressões de ...

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“…As plantas evoluíram um complexo sistema antioxidante para conter os efeitos deletérios das EROs (El-Shabrawi et al, 2010). Condições ambientais estressantes, tais como déficit hídrico, salinidade e calor, causam desbalanço entre produção e remoção das EROs; assim, o saldo final pode ser uma elevação dos níveis de EROs e, consequentemente, o estresse oxidativo, que leva à redução na produtividade dos vegetais (Vaidyanathan et al, 2003;Guo et al, 2006).…”

Section: Introductionunclassified

Aclimatação ao estresse salino em plantas de arroz induzida pelo pré-tratamento com H2O2

Carvalho

Lobo

Bonifácio

et al. 2011

Rev. bras. eng. agríc. ambient.

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RESUMOEstudou-se o efeito da aplicação exógena de peróxido de hidrogênio (H 2 O 2 ) na aclimatação ao estresse salino com base nas alterações fotossintéticas, indicadores de estresse oxidativo e atividade de enzimas antioxidativas em folhas de plantas de arroz. Utilizaram-se duas diferentes concentrações de H 2 O 2 (1 e 10 M) para o pré-tratamento, concentrações essas aplicadas na solução nutritiva dois dias antes da indução do estresse salino (100 mM de NaCl). A limitação fotossintética e estomática resultante da exposição ao NaCl foi amenizada quando as plantas foram pré-tratadas com 1 M de H 2 O 2 . Plantas expostas ao pré-tratamento com H 2 O 2 e expostas ao NaCl apresentaram dano de membrana menor quando comparadas com as plantas submetidas ao NaCl isoladamente. O conteúdo de TBARS e H 2 O 2 foi reduzido sensivelmente nas plantas pré-tratadas com 1 M de H 2 O 2 e expostas ao NaCl em relação às que não foram pré-tratadas. O sistema antioxidativo enzimático nas plantas expostas ao NaCl foi induzido principalmente quando ocorreu o pré-tratamento com 1 M de H 2 O 2 . Os dados sugerem que exposição prévia ao H 2 O 2, pode resultar numa aclimatação mais efetiva às condições de estresse salino. Palavras-chave: peróxido de hidrogênio, estresse oxidativo, salinidadeSalt stress acclimation in rice plants induced by H 2 O 2 pretreatment ABSTRACT The effect of exogenous application of hydrogen peroxide (H 2 O 2 ) in the acclimation to salt stress was studied on the basis of photosynthetic changes, indicators of oxidative stress and activity of antioxidant enzymes in leaves of rice plants. Two different concentrations of the H 2 O 2 (1 and 10 M) were used for the pre-treatment, these concentrations were applied in the nutrient solution two days before the induction of salt stress (100 mM NaCl). The photosynthetic and stomatal limitations after exposure to NaCl were alleviated when the plants were pretreated with 1 M H 2 O 2 . Plants pretreated with H 2 O 2 and submitted to salt stress showed membrane damage lower in compared to plants exposed to NaCl alone. TBARS and H 2 O 2 content was reduced appreciable in plants pretreated with 1 M H 2 O 2 and exposed to NaCl in relation to not pretreated. The enzymatic antioxidative system in plants exposed to NaCl was mainly induced when there was the 1 M H 2 O 2 pretreatment. Data suggest that an anticipated exposure to H 2 O 2 may result in more effective acclimation to salt stress.

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Redox homeostasis, antioxidant defense, and methylglyoxal detoxification as markers for salt tolerance in Pokkali rice

Cited by 251 publications

References 42 publications

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Enzyme activity in soybean seeds produced under foliar application of manganese

Aclimatação ao estresse salino em plantas de arroz induzida pelo pré-tratamento com H2O2

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