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- W154884905 abstract "2 Abstract: Salt damage has a broad physiological spectrum a ffecting metabolic processes. Application of 0.25 ppm brassinolide (BR) and 0.15 ppm salicylic acid (SA) a s se ed soaking and foliar spraying greatly alleviate oxidative stress in maize plants grown under salt stress. Results showed t hat activity of antioxidant en zymes (s uperoxide dismutase, p eroxidase, ca talase and ascorbate peroxidase) sig nificantly increased i n maize shoots as compared w ith stressed c ontrol. The h ighest activity was recorded i n BR- 3 treated plants. Salt stress led to sharp decrease in the levels of IAA, GA and Zeatin, while ABA level greatly increased i n maize shoots. Application with both regulators increased t hese levels and BR- treated plants had higher hormonal content than SA treated plants under the same conditions. Also, BR an d SA markedly i ncreased content o f t otal so luble proteins and nucleic acids ( DNA and RNA) e specially in shoots of 3 w eeks old pl ants irrigated with w ell water + 50 mM NaCl. In addition, protein profile of maize shoots indicate t hat BR and SA regulate e xpression of salt-stress inducible pr oteins as well as induced de novo synthesis of specific polypeptides, w hich are anticipated to play a n active role in salt resistance. T hus, b oth r egulators induced the appearance of no vel p rotein b ands h aving molecular w eights 215, 122, 108 KDa (i nduced by BR), 48, 23 (induced by SA) and 34 (induced by b oth regulators) and not found i n proteins of stressed or u n-stressed control. Other protein bands of molecular weights 100, 89, 43.5, 40.5, 24 and 2 2 K Da w ere detected i n maize shoots in response to s alt stress, BR and S A. Results in t he p resent w ork re vealed t hat treatment with B R and SA greatly alleviate t he harmful effect of salt stress on maize plants by increasing levels of antioxidant enzymes, endogenous growth h ormones and induced the appearance of salt defense p roteins." @default.
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- W154884905 date "2009-01-01" @default.
- W154884905 modified "2023-09-27" @default.
- W154884905 title "Brassinolide and Salicylic Acid Induced Antioxidant Enzymes, Hormonal Balance and Protein Profile of Maize Plants Grown under Salt Stress" @default.
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