Salinity effect on plant growth, PSII photochemistry and chlorophyll content in sugar beet (Beta vulgaris L.) and cabbage (Brassica oleracea Capitata L.)
2007
Jamil, M. (Sunchon National Univ. (Korea). Coll. of Agriculture and Life Sciences) | Rehman, S. (Kohat Univ. of Science and Technology (Pakistan). Dept. of Botany) | Rha, E.S.
Seedlings of sugar beet (Beta vulgaris L.) and cabbage (Brassica oleracea capitata L.) were grown in sand culture at salinities of 0 (control), 50, 100 and 150 mM NaCl to determine the effect of salt on growth, chlorophyll fluorescence and chlorophyll content. With increasing salt concentration, dry root and shoot weight, fresh leaf weight and leaf area decreased significantly whereas there were no changes in dry leaf weight and leaf water contents. Salinity induced no effects in both species on the maximal efficiency of PSII (Fv/Fm) photochemistry, efficiency of excitation energy capture by open PSII reaction centres, electron transport rate (ETR), photochemical quenching coefficient (qp), non-photochemical quenching coefficient (qn) and physiological state of the photosynthetic apparatus (Fo/Fm). However, leaf chlorophyll content increased significantly with increasing salt concentration both in cabbage and sugar beet.
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