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Publication Type J
Authors Yang, C. W., A. Jianaer, C. Y. Li, D. C. Shi and D. L. Wang
Title Comparison of the effects of salt-stress and alkali-stress on photosynthesis and energy storage of an alkali-resistant halophyte Chloris virgata
Source Photosynthetica
Author Keywords carotenoids; chlorophyll; leaf area; net photosynthetic rate; relative growth rate; stomatal conductance; transpiration rate; water content cicer-arietinum l.; water relations; nacl salinity; growth; accumulation; responses; wheat; leaves; plants; soils
Abstract Seedlings of Chloris virgata were treated with varying (0-160 mM) salt-stress (SS; 1: 1 molar ratio of NaCl to Na2SO4) or alkali-stress (AS; 1: 1 molar ratio of NaHCO3 to Na2CO3). To compare these effects, relative growth rates (RGR), stored energy, photosynthetic pigment contents, net photosynthetic rates, stomatal conductance, and transpiration rates were determined. Both stresses did not change significantly the photosynthetic parameters of C. virgata under moderate stress (below 120 mM). Photosynthetic ability decreased significantly only at high stress (160 mM). Thus C. virgata, a natural alkali-resistant halophyte, adapts better to both kinds of stress. The inhibition effects of AS on RGR and energy storage of C. virgata were significantly greater than that of SS of the same intensity. The energy consumption of C. virgata was considerably greater while resisting AS than while resisting SS.
Author Address NE Normal Univ, Key Lab Vegetat Ecol, Minist Educ, Changchun 130024, Jilin Province, Peoples R China. Yili Normal Univ, Coll Chem & Biol Sci, Yili 835000, Peoples R China. Shi, DC, NE Normal Univ, Key Lab Vegetat Ecol, Minist Educ, Changchun 130024, Jilin Province, Peoples R China. shidc274@nenu.edu.cn
29-Character Source Abbreviation Photosynthetica
Publication Date Jun
Year Published 2008
Volume 46
Issue 2
Beginning Page 273-278
Unique Article Identifier ISI:000256340500018
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