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Acta Prataculturae Sinica ›› 2011, Vol. 20 ›› Issue (3): 84-90.

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Effect of salt stress on physiological and biochemical characteristics of Amorpha fruticosa seedlings

ZOU Li-na, ZHOU Zhi-yu, YAN Shu-yun, QIN Yu   

  1. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
  • Received:2010-01-15 Online:2011-03-25 Published:2011-06-20

Abstract: Physiological characteristics of Amorpha fruticosa leaves, including photosynthetic rate, enzyme activity, organic osmolytes etc. were studied under different soil salt concentrations. The mechanism of salt-tolerance in A. fruticosa is discussed. The net photosynthesis rate (Pn), transpiration rate (Tr), stomatal conductance (Gs) and the content of K+ decreased with reduced severity of salt stress, while the activities of SOD and POD, the contents of soluble sugar, free praline (Pro) and Na+ noticeably increased. The contents of chlorophyll a (Chla), chlorophyll b (Chlb), total chlorophyll (Chl) and carotenoid pigment increased along with the increase in soil salt concentrations, but, the ratio of Chla/Chlb showed no significant change. The results show that the improvement of leaf salt-tolerance in A. fruticosa seedlings resulted from the modulation of physiological characteristics and A. fruticosa had certain salt-tolerant characteristics.

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