A role for brassinosteroids in the amelioration of aluminium stress through antioxidant system in mung bean (Vigna radiata L. Wilczek)

Ali, Barket; Hasan, Shirin; Hayat, Shamsul; Hayat, Qaiser; Yadav, Sunil Kumar; Fariduddin, Qazi; Ahmad, Aqil

doi:10.1016/j.envexpbot.2007.07.014

Cited by 264 publications

(132 citation statements)

References 40 publications

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“…O 24-epibrassinolídeo também é reconhecido por restabelecer ou induzir a germinação e todas as características de crescimento sob estresse salino em Eucalyptus (Sasse et al,2003) e arroz (Anuradha e Rao, 2001;Anuradha e Rao, 2003), em trigo e sorgo sob estresse hídrico (Vardhini e Rao, 2003) e arroz, tomate e abóbora (Anuradha e Rao, 2001 ) sob estresse por frio, além de aumentar a tolerância das plântulas sob estresse (Ali et al, 2008). Em geral, a aplicação do 24-epibrassinolídeo foi positiva, principalmente no genótipo suscetível a salinidade, quando comparado com as plântulas não tratadas (controle) ou com plântulas tratadas com NaCl 100 mM.…”

Section: Tabela 2 Condutividade Elétrica Com Três E 24 Horas De Embunclassified

Qualidade fisiológica de sementes de arroz tratadas com solução salina e 24-epibrassinolídeo

Larré¹,

Moraes²,

Lopes³

2011

Rev. bras. sementes

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RESUMO -Os efeitos da salinidade no desempenho germinativo das sementes de várias espécies têm sido estudados ao longo do tempo, aumentando consideravelmente o período de germinação pela presença de sais solúveis no solo. Os brassinosteróides são fitohormônios envolvidos no alongamento e divisão celular e devido a isto estão associados ao aumento na tolerância da planta aos estresses biótico e abiótico. Diante do exposto, conduziu-se este trabalho com o objetivo de avaliar o efeito na germinação sob estresse salino das sementes de arroz que receberam tratamento com 24-epibrassinolídeo. Para testar o proposto, foram utilizadas sementes das cultivares BRS Querência e BRS Bojurú suscetível e tolerante a salinidade, consecutivamente. O experimento foi constituído por cinco tratamentos, sendo um com água destilada (zero), um com solução de 100 mM de NaCl e mais três tratamentos compostos por uma solução de 100 mM de NaCl complementada com 24-epibrassinolídeo nas concentrações 0,01; 0,1; e 1,0 μM. As sementes das duas cultivares foram embebidas por duas horas nas respectivas soluções e avaliadas pelos seguintes testes: germinação, primeira contagem da germinação, índice de velocidade de germinação, condutividade elétrica (às 3 e 24 horas), comprimento e massa seca da parte aérea e da raiz. Os tratamentos compuseram um fatorial 2x5, ou seja, 2 cultivares e 5 soluções e o delineamento experimental utilizado foi inteiramente casualizado, com quatro repetições. As médias foram comparadas pelo teste de Tukey aos 5% de probabilidade. A cultivar BRS Querência teve a germinação e o vigor restabelecidos pela suplementação da solução salina com 24-epibrassinolídeo. As sementes da cultivar BRS Bojurú, não perderam seu percentual germinativo quando submetidas ao tratamento com solução de 100 mM de NaCl e a adição de 24-epibrassinolídeo na concentração mais baixa, 0,01 μM, proporcionou incremento no potencial germinativo, porém, a concentração mais elevada reduziu a germinação das sementes de arroz desta cultivar. Pode-ser inferir que o 24-epibrassinolídeo é capaz de reverter o efeito do estresse salino em sementes de arroz, suscetíveis a salinidade, não atuando da mesma forma em cultivares mais tolerantes.Termos para indexação: salinidade, vigor, viabilidade, brassinosteróides. PHYSIOLOGICAL QUALITY OF RICE SEEDS TREATED WITH SALINE SOLUTION AND 24-EPIBRASSINOLIDEABSTRACT -The effects of salinity on the germination of seeds of various species have shown that the germination period increased significantly with the presence of soluble salts 86

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Section: Tabela 2 Condutividade Elétrica Com Três E 24 Horas De Embunclassified

Qualidade fisiológica de sementes de arroz tratadas com solução salina e 24-epibrassinolídeo

Larré¹,

Moraes²,

Lopes³

2011

Rev. bras. sementes

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“…The enhanced chilling resistance was attributed to BRs induced effects on membrane stability and osmoregulation (Wang and Zeng 1993) and highly effective in stimulating growth of young vegetative tissues (Sasse 1991). BRs could prevent loss of photosynthetic pigments, for example, by activation of enzymes that participate in chlorophyll biosynthesis (Hayat et al 2007 andAli et al 2008a, b).…”

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Physiological and biochemical effect of 24-epibrassinoslide on cold tolerance in maize seedlings

Singh

Kumar

Singh

et al. 2012

Physiol Mol Biol Plants

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Germination and early seedling growth are important for establishment of maize because maize is chilling sensitive crop and low temperature during early period of growth can be detrimental to subsequent crop growth and productivity. Therefore, it is important to protect maize seedling from cold stress. A study was conducted on induced cold tolerance by 24-epibrassinoslide (EBR) at the Indian Agricultural Research Institute, New Delhi, India. Maize seedlings were raised in green house condition (25/18°C day-night temperatures). Ten days old seedlings were treated with EBR (0.0, 0.01, 0.1, 1.0 and 10 μM) and then divided into two sets, one set was kept in greenhouse (25/18°C day-night temperatures) and another was transferred to net house (cold stress). Data on various morpho-physiological traits was recorded after 7, 14 and 21 days of treatment. Exogenous application of 1.0 μM EBR had significant effect on growth and morpho-physiological traits under both conditions. The maize seedlings treated with EBR were more tolerant to cold stress than the untreated one. Significant increase in plant height, dry matter accumulation, chlorophyll content, total soluble proteins and starch contents was observed under both conditions, however, the results were more pronounced under cold stress. 1.0 μM concentration being the most effective under both conditions. Maintenance of high tissue water content, reduced membrane injury index, increased total chlorophyll, soluble sugar and protein content were taken as the possible indicators of EBR induced chilling tolerance.

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“…Regardless of these, Al has been evident in inducing the ROS that predominantly includes the oxygen at its various levels of oxidation and energy states (Liu et al 2008). The tolerance to Al induced oxidative stress in plants is implicated by the mechanisms of either down regulation of generation of ROS and/or quenching the excess energy of it (Ali et al 2008). Some enzymes cascade, sequential in activities for cellular pathways, accomplishes the anti oxidation processes.…”

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confidence: 99%

Antioxidative responses of Salvinia (Salvinia natans Linn.) to aluminium stress and it’s modulation by polyamine

Mandal

Ghosh

Maiti

et al. 2012

Physiol Mol Biol Plants

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Antioxidative stress response of free-floating aquatic fern (Salvinia natans Linn.) was studied under increasing toxic amount of aluminium (Al) and its modulation by exogenous application of polymaine. Increased levels of superoxide (O 2 − ) and hydrogen peroxide (H 2 O 2 ) species from affected tissues suggested that plants were undergoing oxidative stress and it was concominant with increased accumulation of Al in a dose dependent manner. Application of polyamine like putrescine (Put) led to a decrease in oxidative stress as revealed by reduced level of O 2 − and H 2 O 2 . Al toxicity resulted into decreased biomass that was ameliorated by the application of Put. The changes observed in lipid peroxidation (MDA) and protein oxidation also indicated that plats are undergoing Al induced oxidative stress. In order to circumvent the oxidative stress resulting from Al toxicity, plants enzymatic and nonenzymatic antioxidant pathways were active. The ratio of both oxidized and reduced cellular glutathione exhibited significant variation in response to Al stress and was improved upon Put treatment. Peroxidase and glutathione were upregulated whereas catalse was downregulated under varying doses of Al. Isozyme profile of above enzymes also showed a trend with increasing amount of Al. The nuclear disintegration study using comet assay was indicative of Al induced oxidative stress. In the present study, we have explored the antioxidative response of aquatic fern Salvinia natans Linn in response to Al toxicity. The application of polyamine Put improved the overall antioxidative response and thus would make it a better candidate to be used as hyper accumulator of Al and other toxic metals.

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A role for brassinosteroids in the amelioration of aluminium stress through antioxidant system in mung bean (Vigna radiata L. Wilczek)

Cited by 264 publications

References 40 publications

Qualidade fisiológica de sementes de arroz tratadas com solução salina e 24-epibrassinolídeo

Qualidade fisiológica de sementes de arroz tratadas com solução salina e 24-epibrassinolídeo

Physiological and biochemical effect of 24-epibrassinoslide on cold tolerance in maize seedlings

Antioxidative responses of Salvinia (Salvinia natans Linn.) to aluminium stress and it’s modulation by polyamine

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