Photosynthetica 1998, 35(2):285-287 | DOI: 10.1023/A:1006983411991

Growth and Photosynthetic Characteristics of Ceriops Roxburghiana under NaCl Stress

A. Rajesh1, R. Arumugam1, V. Venkatesalu1
1 Department of Botany, Annamalai University, Annamalainagar, Tamilnadu, India

The plant growth, net photosynthetic rate (PN), intercellular CO2 concentration (ci), and dry matter production of Ceriops roxburghiana Arn. were significantly increased with increasing salinity from 0 to 400 mM NaCl. At 600 mM NaCl, shoot and root lengths, and dry mass were significantly depressed with respect to control. Absence of diurnal fluctuation of concentrations of organic acids, and the low activity of phosphoenolpyruvate carboxylase and high activity of ribulose-1,5-bisphosphate carboxylase confirmed the operation of C3 pathway in Ceriops even at increasing salinity.

Additional key words: carbon assimilation pathway; chlorophyll; intercellular CO2 concentration; phosphoenolpyruvate carboxylase; ribulose-1,5-bisphosphate carboxylase; salinity

Prepublished online: June 1, 1998; Published: January 1, 1998  Show citation

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Rajesh, A., Arumugam, R., & Venkatesalu, V. (1998). Growth and Photosynthetic Characteristics of Ceriops Roxburghiana under NaCl Stress. Photosynthetica, 35(2), 285-287. doi: 10.1023/A:1006983411991
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