Effect of NaCl Stress on the Photosynthetic Attributes of Atriplex centralasiatica

Abstract:

Seedlings of Atriplex centralasiatica Iljin were treated with Hoaglands solution containing 0, 200 and 400 mM NaCl respectively, after 2 weeks, Pn, Gs and Ci were measured. Besides, CO₂ compensation point, CO₂ saturation point, photorespiration rate, plant fresh weight and other physiological parameters were measured. The results showed that under 400 mM NaCl, the decrease of Pn was due to non-stomatal limitation factor. With the increase of NaCl concentrations, CO₂ compensation point and CO₂ saturation point did not show significant change. The photorespiration rate of the plants treated with 200 mM NaCl showed a little increase. However, under 400 mM NaCl, the increase of photorespiration rate was not that significant. As far as the carboxylation efficiency is concerned, it decreased with NaCl concrntration. At last, the fresh weight showed significant change under 400 mM NaCl treatment, which paralleled with the change of photosynthesis.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 285-289
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.285
• Online since: February 2014
• Authors: Hai Fan*, Xu Yun, Ling Li, Xiao Kun Liu, Jie Zhang, Bao Shan Wang
• Keywords: Atriplex centralasiatica Iljin, Carboxylation Efficiency, CO₂ Compensation Point, CO₂ Saturation Point, Photorespiration, Salt Stress

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