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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (10): 42-47.doi: 10.11924/j.issn.1000-6850.casb2020-0248

所属专题： 生物技术； 园艺

• 林学·园艺·园林 • 上一篇    下一篇

盐分胁迫对景天三七幼苗生理生化特性的影响

黄雅丽1(), 刘幸红1(), 黄雯佳2, 潘亚冬3, 彭琳1, 杜庆松4, 刘金龙4, 牟相芹3, 刘方春1   

  1. 1山东省林业科学研究院,济南 250014
    2单县国有高韦庄苗圃,山东菏泽 274300
    3山东省林业科技培训中心,济南 250013
    4山东省林业基金管理站,济南 250014
  • 收稿日期:2020-07-10 修回日期:2021-02-08 出版日期:2021-04-05 发布日期:2021-04-12
  • 通讯作者: 刘幸红
  • 作者简介:黄雅丽,女,1992年出生,山东滕州人,硕士,主要从事森林土壤方面的研究。通信地址：250014 济南市文化东路42号 山东省林业科学研究院,Tel：0531-88557780,E-mail： 942099863@qq.com。
  • 基金资助:
    山东省林业科技创新项目“林地土壤质量提升关键技术研究与应用”(2019LY009)

Effects of Salt Stress on Physiological and Biochemical Characteristics of Sedum aizoon Seedling

Huang Yali1(), Liu Xinghong1(), Huang Wenjia2, Pan Yadong3, Peng Lin1, Du Qingsong4, Liu Jinlong4, Mou Xiangqin3, Liu Fangchun1   

  1. 1Shandong Academy of Forestry, Jinan 250014
    2State Owned Gaoweizhuang Nursery in Shanxian County, Heze Shandong 274300
    3Shandong Forestry Science and Technology Training Center, Jinan 250013
    4Forestry Fund Management Station of Shandong Province, Jinan 250014
  • Received:2020-07-10 Revised:2021-02-08 Online:2021-04-05 Published:2021-04-12
  • Contact: Liu Xinghong

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摘要：

采用不同盐分土壤(0.2%、0.4%、0.6%、0.8%、1.0%、1.2%)对景天三七幼苗进行胁迫处理,通过其生长情况、Na+和K+含量及生理生化特征,探讨景天三七耐盐性能及机理。结果表明,盐胁迫下,景天三七幼苗生理生化特性均有明显差异。≤0.4%盐分对景天三七幼苗生长具有促进作用,盐分浓度达到1.0%植株生长受到抑制。随着盐分浓度的增大,植物体内Na+含量有升高的趋势,Na+/K+比值逐渐增加;而SOD、CAT及POD活性总体呈先上升后下降趋势。同时,植物体内可溶性糖含量随着盐分浓度的增大显著升高,当盐分浓度为0.8%时达最大值;可溶性蛋白含量呈先升高后下降的趋势,且差异显著。叶绿素含量随盐浓度增大而减少,0.4%、0.6%和0.8%盐浓度下的叶片叶绿素含量比0.2%盐浓度下分别降低了11.5%、50.0%和79.9%。可见,≤0.4%盐分浓度可提高景天三七抗氧化酶活性,增强植物抗性,促进植物生长。

关键词: 景天三七, 盐胁迫, 生长, 抗氧化物质, 抗氧化酶

Abstract:

To explore the salt tolerance mechanism of Sedum aizoon seedlings, six salt gradients including 0.2%, 0.4%, 0.6%, 0.8%, 1.0% and 1.2% NaCl were conducted to determine their influence on seedling growth, content of Na+, K+, soluble sugar, soluble protein and chlorophyll, as well as the activity of SOD, CAT and POD. The results show that significant differences on physiological and biochemical characteristics are observed among S. aizoon seedlings under different salt stress conditions. When the salt concentration is no more than 0.4%, it could promote the growth of S. aizoon, while the salt concentration reaching 1.0% could inhibit the plant growth. As the increase of the salt concentration, the Na+ content and the Na+/K+ ratio increase gradually, whereas the activities of SOD, CAT and POD present a first increase and then decrease trend. The soluble sugar content in plants increases significantly with the increase of the salt concentration, reaching the maximum at 0.8% concentration. A trend of the soluble protein content of first increase and then decrease is observed with the increase of salt concentration. Meanwhile, the chlorophyll content has a continuous decreasing trend with the increase of the salt concentration. Compared with 0.2% salt concentration, chlorophyll content under 0.4%, 0.6% and 0.8% is decreased by 11.5%, 50.0% and 79.9%, respectively. Overall, when the salt concentration is no more than 0.4%, it can improve the salt stress resistance by enhancing the activity of antioxidant enzymes and then promote seedling growth of S. aizoon.

Key words: Sedum aizoon, salt stress, growth, antioxidant substance, antioxidant enzyme

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