欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (1): 34-39.doi: 10.11924/j.issn.1000-6850.casb17090097

所属专题： 生物技术； 马铃薯

• 农学 农业基础科学 • 上一篇    下一篇

复盐胁迫对木薯幼苗光合特性及抗氧化酶活性的影响

孟富宣1, 段元杰1, 杨玉皎1, 刘光华2, 刘海刚1   

  1. 1.云南省农业科研学院人热区生态农业研究所;2.云南省农业科学院热带亚热带经济作物研究所S云南 保山
  • 收稿日期:2017-09-18 修回日期:2018-11-29 接受日期:2017-12-22 出版日期:2019-01-02 发布日期:2019-01-02
  • 通讯作者: 刘海刚
  • 基金资助:
    云南省科技计划项目“多用途木薯优良品种选育及产品开发”(2014RA062-1)。

Effects of Mixed Saline Stress on Photosynthetic Characteristics and Antioxidant Enzymes Activity of Cassava Seedlings

  • Received:2017-09-18 Revised:2018-11-29 Accepted:2017-12-22 Online:2019-01-02 Published:2019-01-02

PDF (PC)

223

摘要： 为了研究复盐胁迫对木薯幼苗光合特性和抗氧化酶活性的影响。本研究以‘华南8号’和‘桂热911’为代表试材，采用盆栽法，设置0 (CK)、0.05、0.1、0.15、0.2 mol/L 5个复盐处理浓度，对不同浓度复盐处理后的木薯幼苗叶绿素含量、光合参数和抗氧化酶活性进行测定分析。结果表明，复盐胁迫下，‘华南8号’和‘桂热911’幼苗叶片中叶绿素含量呈先上升后下降的趋势，浓度为0.15 mol/L时叶绿素含量最高，分别是2.52 mg/g、2.35 mg/g；光合参数Pn、Tr、Gs、Ci、WUE及Ls总体呈先上升后下降的趋势，低浓度复盐胁迫下光合速率‘华南8号’＞‘桂热911’，高浓度复盐胁迫下品种间差异不显著。相同浓度复盐胁迫下‘桂热911’的SOD、POD和CAT活性均高于‘华南8号’。综合NaCl-Na2SO4胁迫对‘华南8号’和‘桂热911’光合指标和抗氧化酶活性的影响，‘桂热911’对NaCl-Na2SO4胁迫的耐受性高于‘华南8号’。

关键词: 平湖市, 平湖市, 小麦, 分层抽样, 遥感监测, 面积估算

Abstract: The aim is to study the effects of mixed saline stress on photosynthetic characteristics and antioxidant enzymes of cassava seedling. We chose‘SC8’and‘GR911’as representative test materials and used potted method. The seedlings were treated with mixed saline treatment at 0 (CK), 0.05, 0.1, 0.15 and 0.2 mol/L. With different concentrations of mixed saline, chlorophyll contents, photosynthetic parameters and antioxidant enzymes activity of the cassava seedlings were determined and analyzed. The results showed that the chlorophyll contents in the leaves of‘SC8’and‘GR911’seedling went up first and then dropped under mixed saline stress, reached the highest when NaCl-Na2SO4 concentration was 0.15 mol/L, which was 2.52 and 2.35 mg/g, respectively. The photosynthetic parameters Pn, Tr, Gs, Ci, WUE and Ls increased first and then decreased, and the photosynthetic rate was‘SC8’＞’GR911’under low mixed saline stress, but the difference between‘SC8’and‘GR911’was not significant under high mixed saline stress. The enzyme activities of SOD, POD and CAT in‘GR911’were higher than those in‘SC8’under the same concentration of mixed saline stress. Comprehensive consideration of the effects of NaCl- Na2SO4 stress on photosynthetic indexes and antioxidant enzyme activities of‘SC8’and‘GR911’, NaCl-Na2SO4 tolerance of‘GR911’is higher than that of‘SC8’.