Improvement of photosynthesis by Sub1 QTL in rice under submergence: probed by chlorophyll fluorescence OJIP transients

Improvement of photosynthesis by Sub1 QTL in rice under submergence: probed by chlorophyll fluorescence OJIP transients

Автор: Panda Debabrata, Sarkar Ramani Kumar

Журнал: Журнал стресс-физиологии и биохимии @jspb

Статья в выпуске: 3 т.7, 2011 года.

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The influence of submergence on the photosynthetic activity in rice plants either possessing or not possessing Sub1 QTL i.e. Swarna and Swarna Sub1 cultivars (cv.) were evaluated under simulated complete submergence. The leaf photosynthetic rate and stomatal conductance decreased in both the cv. during the progression of submergence as compared to control plant but significant varietal differences was observed after 1 day (d) of submergence. Submergence also alters the photo-system (PS) II activity, as reflected in a decrease in the values of Fo, Fm and the Fv/Fm ratio and degradation of chlorophyll, more in Swarna than that of Swarna Sub1. Under complete submergence the shape of the OJIP transient also changed in rice leaves with decrease in maximal fluorescence (P=Fm) intensity, resulted lowering of variable fluorescence levels. The decrease was more pronounced in Swarna compared to the Swarna Sub1 cv. Thus, Swarna Sub1 improves photosynthetic activity showing more photosynthetic rate compared to Swarna under submergence because, of less degradation of chlorophyll, higher stomatal conductance, and efficient PS II activity.

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Antioxidant, chlorophyll fluorescence, photosynthesis, submergence

Короткий адрес: https://sciup.org/14323537

IDR: 14323537

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