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草业学报 ›› 2011, Vol. 20 ›› Issue (3): 84-90.

• 研究论文 • 上一篇    下一篇

盐分胁迫对紫穗槐幼苗生理生化特性的影响

邹丽娜,周志宇*,颜淑云,秦彧   

  1. 兰州大学草地农业科技学院,甘肃 兰州 730020
  • 收稿日期:2010-01-15 出版日期:2011-03-25 发布日期:2011-06-20
  • 通讯作者: E-mail:zyzhou@lzu.edu.cn
  • 作者简介:邹丽娜(1982-),女,甘肃张掖人,在读硕士。E-mail:lzuzoulina@163.com
  • 基金资助:
    国家重点基础研究发展规划项目资助 (973项目)(2007CB108903),甘肃省重大科技项目(2GS063-A31-010)和国家自然科学基金项目(30800801)资助。

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

摘要: 本研究通过人为控制土壤盐分梯度,以盆栽当年生紫穗槐幼苗为材料,研究不同盐分条件下紫穗槐叶片光合速率、酶活性、有机渗透调节物质等生理特性,探讨紫穗槐耐盐机制。结果表明,随盐分胁迫程度的加剧,紫穗槐幼苗的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、K+含量逐渐下降,超氧化物歧化酶(SOD)活性、过氧化物歧化酶(POD)活性、Na+、可溶性糖和游离脯氨酸含量则显著上升;叶绿素a、叶绿素b、叶绿素总量、类胡萝卜素含量随土壤盐分浓度的增加逐渐增大,而叶绿素a与叶绿素b含量之比无显著变化。以上生理指标反映出紫穗槐幼苗对盐渍环境的适应性变化,是其抵御逆境的一种积极调节机制。

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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