草地学报 ›› 2022, Vol. 30 ›› Issue (3): 661-669.DOI: 10.11733/j.issn.1007-0435.2022.03.019

• 研究论文 • 上一篇    

干旱胁迫下CO2浓度倍增对达乌里胡枝子幼苗生长及抗氧化特性的影响

杨耀国1,2, 牛冰洁1,2, 王永新1,2, 卫昭君1,2, 郭媛珍1,2, 王开喜1,2, 马春1,2, 赵祥1,2, 朱慧森1,2   

  1. 1. 山西农业大学草业学院, 山西 太谷 030801;
    2. 草地生态保护与乡土草种质创新山西省重点实验室, 山西 太谷 030801
  • 收稿日期:2021-07-24 修回日期:2021-12-25 发布日期:2022-03-30
  • 通讯作者: 王永新,E-mail:yongxwang@126.com
  • 作者简介:杨耀国(1996-),男,汉族,内蒙古乌兰察布人,硕士研究生,主要从事饲草生产与利用,E-mail:Yang18147505327@163.com
  • 基金资助:
    山西省重点研发计划项目(201903D211012);山西农业大学横向科技项目(2019HX17)资助

Effects of Doubling CO2 Concentration on the Growth and Antioxidant Characteristics of Lespedeza davurica Seedlings Under Drought Stress

YANG Yao-guo1,2, NIU Bing-jie1,2, WANG Yong-xin1,2, WEI Zhao-jun1,2, GUO Yuan-zhen1,2, WANG Kai-xi1,2, MA Chun1,2, ZHAO Xiang1,2, ZHU Hui-sen1,2   

  1. 1. College of Grassland Science, Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;
    2. Shanxi key Laboratory of Grassland Ecological Protection and Native Grass Germplasm Innovation, Taigu, Shanxi Province 030801, China
  • Received:2021-07-24 Revised:2021-12-25 Published:2022-03-30

摘要: 为探讨CO2浓度倍增对达乌里胡枝子(Lespedeza davurica)自然干旱胁迫的生长及抗氧化特性的影响,本试验通过人工气候培养箱控制不同CO2浓度(400μmol·mol-1(CK)和800μmol·mol-1(DCO2)),在自然干旱胁迫条件下每隔2d(共8次)测定幼苗生长特性和抗氧化特性。结果表明:CO2倍增缓解了干旱胁迫对达乌里胡枝子幼苗株高的抑制作用,同时促进其主根的生长;CO2倍增提高了干旱胁迫下达乌里胡枝子幼苗的超氧化物歧化酶和过氧化物酶活性,增加了叶片相对含水量和脯氨酸含量,抑制了丙二醛合成,降低了相对电导率。综上所述,CO2倍增在一定程度上提高了达乌里胡枝子幼苗叶片的抗氧化酶活性,延缓膜脂过氧化的发生,提高达乌里胡枝子幼苗对干旱的耐受性。

关键词: 达乌里胡枝子, CO2倍增, 干旱胁迫, 抗氧化特性

Abstract: In order to investigate the effects of CO2 doubling on growth and antioxidant properties of Lespedeza Davurica under natural drought stress,different CO2 concentrations (400 μmol·mol-1 (CK) and 800 μmol·mol-1 (DCO2)) were controlled in an artificial climate culture chamber. Seedling growth and antioxidant properties were measured every 2 d (8 times in total) under natural drought stress. The results showed:the doubling increase of CO2 alleviated the inhibition effect of drought stress on plant height and promoted the taproot growth of Lespedeza Davurica seedlings simultaneously. The doubling increase of CO2 promoted the activities of superoxide dismutase and peroxidase,increased the relative water content and proline content of leaves,inhibited the synthesis of malondialdehyde,and decreased the relative electrical conductivity of Lespedeza Davurica seedlings under drought stress. To a certain extent,the doubling increase of CO2 raised the activity of antioxidant enzymes,delayed the occurrence of membrane lipid peroxidation,and improved the drought tolerance of Lespedeza Davurica seedlings.

Key words: Lespedeza davurica, Doubled CO2, Drought stress, Antioxidant properties

中图分类号: