Effect of salt stress on proline accumulation, photosynthetic ability and growth characters in two maize cultivars
2009
Cha-Um, S. (National Center for Genetic Engineering and Biotechnology, Pathumthani (Thailand)) | Kirdmanee, C. (National Science and Technology Development Agency, Pathumthani (Thailand))
Salt stress strongly affects on plant growth and development, especially maize plant, which is reported as a salt sensitive species. The salt tolerant identification in the large genetic resources and breeding population is a profitable research topic for solving the salinity problem. Two maize cultivars, viz., sweet (Zea mays L. cv. Saccharata) and waxy (Z. mays L. cv. Ceratina) seedlings were treated with 0 (control), 100, 200, 300 or 400 mM NaCl. Osmotic potential (psis) or water availability in the culture media was limited, relating to increase in the NaCl concentrations of the growth medium. The chlorophyll degradation in the salt stressed seedlings was positively related to (psis) in the culture media. Chlorophyll a (Chla), chlorophyll b (Chlb) and total chlorophyll (TC) concentrations in the salt stressed leaves significantly dropped, depending on salt treatments except total carotenoids (Cx+c) content which was decreased by the factors of salt concentrations, cultiv
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