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- W1963986875 abstract "Glycinebetaine (Glybet) accumulation, photosynthetic efficiency and growth performance in indica rice cultivated under salt stress and extreme pH stress were investigated. Betaine aldehyde dehydrogenase (BADH) activity and Glybet accumulation in the seedlings of salt-tolerant and salt-sensitive rice varieties grown under saline and acidic conditions peaked after treatment for 72 h and 96 h, respectively, and were higher than those grown under neutral pH and alkaline salt stress. A positive correlation was found between BADH activity and Glybet content in both salt-tolerant (r^2=0.71) and salt-sensitive (r^2=0.86) genotypes. The chlorophyll a, chlorophyll b, total chlorophyll and total carotenoids contents in the stressed seedlings significantly decreased under both acidic and alkaline stresses, especially in the salt-sensitive genotype. Similarly, the maximum quantum yield of PSII (F√F(subscript m)), photon yield of PSII (Ф(subscript PSII)), non-photochemical quenching (NPQ) and net photosynthetic rate (P(subscript n)) in the stressed seedlings were inhibited, leading to overall growth reduction. The positive correlations between chlorophyll a content and F√F(subscript m), total chlorophyll content and Ф(subscript PSII), Ф(subscript PSII) and P(subscript n) as well as P(subscript n) and leaf area in both salt-tolerant and salt-sensitive genotypes were found. Saline acidic and saline alkaline soils may play a key role affecting vegetative growth prior to the reproductive stage in rice plants." @default.
- W1963986875 created "2016-06-24" @default.
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- W1963986875 date "2009-12-01" @default.
- W1963986875 modified "2023-09-27" @default.
- W1963986875 title "Comparative Effects of Salt Stress and Extreme pH Stress Combined on Glycinebetaine Accumulation, Photosynthetic Abilities and Growth Characters of Two Rice Genotypes" @default.
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- W1963986875 doi "https://doi.org/10.1016/s1672-6308(08)60091-8" @default.
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