Responses of rice leaf photosynthetic parameters to light intensity under NaCl stress
Li, H.; Chen, W.; Li, Q.
Ying Yong Sheng Tai Xue Bao 17(9): 1588-1592
2006
ISSN/ISBN: 1001-9332 PMID: 17147162 Document Number: 601576
With rice varieties salt-tolerant Liaoyan 2 and salt-sensitive Akihikari as test materials, this paper determined their leaf net photosynthetic rate (P-n), transpiration rate (T-t), stomatal conductivity (G(s)), and intercellular CO2 concentration (C-i) at different light intensities under long-term NaCl stress. The results showed that under NaCl stress, the P-n and G(s) of the two varieties had an increase tendency with increasing light intensity, but in comparing with no NaCl stress, the P-n of Liaoyan 2 increased by 14.87%, while that of Akihikari decreased by 17.91%. The dynamic changes of C-i, L-s and P-n/G(s) indicated that stomatal and non-stamatal factors played a positive role in the changes of Liaoyan 2 photosynthesis, while stomatal factor was the main reason inducing the changes of Akihikari photosynthesis.