干旱胁迫下白刺花幼苗根系生长和生理特性的响应

doi:10.11733/j.issn.1007-0435.2023.01.014

草地学报 ›› 2023, Vol. 31 ›› Issue (1): 120-129.DOI: 10.11733/j.issn.1007-0435.2023.01.014

干旱胁迫下白刺花幼苗根系生长和生理特性的响应

赵文武¹, 赵鑫¹, 谢文辉¹, 赵丽丽¹, 陈可可¹, 王普昶²

1. 贵州大学动物科学学院, 贵州贵阳 550025;
2. 贵州师范大学生命科学学院, 贵州贵阳 550025

收稿日期:2022-07-11 修回日期:2022-08-24 出版日期:2023-01-15 发布日期:2023-02-07
通讯作者: 赵丽丽, E-mail:zhaolili_0508@163.com
作者简介:赵文武(1998-)，男，汉族，贵州贵阳人，硕士研究生，主要从事牧草种质资源及育种研究，E-mail：690803340@qq.com
基金资助:
贵州省科技计划项目(黔科合基础[2020]1Z026；黔科合支撑[2021]一般155；黔科合平台人才[2021]5636 号)；国家自然科学基金(32060391)资助

Response of Root Growth and Development and Physiological Characteristics of Sophora davidii under Drought Stress

ZHAO Wen-wu¹, ZHAO Xin¹, XIE Wen-hui¹, ZHAO Li-li¹, CHEN Ke-ke¹, WANG Pu-chang²

1. College of Animal Science, Guizhou University, Guiyang, Guizhou Province 550025, China;
2. College of Life Sciences, Guizhou Normal University, Guiyang, Guizhou Province 550025, China

Received:2022-07-11 Revised:2022-08-24 Online:2023-01-15 Published:2023-02-07

摘要/Abstract

摘要： 近年来干旱频发，严重限制了作物生产和植被恢复。因此，鉴定天然耐旱植物物种具有重要意义。通过对白刺花(Sophora davidii)盆栽苗干旱处理，设置4个干旱梯度，分析干旱胁迫下白刺花根系生长生理指标，发现其根系最先感知到干旱来临，其根长、表面积、体积增加，生长素、赤霉素、脯氨酸、可溶性糖以及丙二醛和过氧化氢含量上升，超氧化物歧化酶、过氧化物酶、过氧化氢酶活性下降，抗坏血酸过氧化物酶活性上升；在重度干旱下白刺花也未发生严重脱水和幼苗死亡的现象，表明其有较强的抗旱性，适合在半干旱区以及喀斯特地区的生态恢复重建与饲料开发中应用。试验阐明白刺花抗旱的适应机制，揭示白刺花抗旱能力，为白刺花在西部喀斯特地区全方位、立体式产业开发利用提供一定的参考依据。

关键词: 干旱, 白刺花, 活性氧代谢, 渗透调节, 内源激素

Abstract: Droughts have been frequent in recent years,severely limiting crop production and vegetation recovery. Therefore,it is important to identify natural drought-tolerant plant species. The physiological indicators of root growth under drought stress were analyzed by setting four drought gradients in Sophora davidii potted seedlings,and it was found that the root system was the first to sense the onset of drought,and its root length,surface area,and volume increased,and the contents of auxin (IAA),gibberellins (GA₃),proline,soluble sugars and malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) contents increased,superoxide dismutase (SOD),peroxidase (POD) and catalase (CAT) activities decreased,and ascorbate peroxidase (APX) activity increased. Under severe drought,S. davidii did not suffer from severe dehydration and seedling death,indicating that it has strong drought resistance and is suitable for application in ecological restoration and fodder development in semi-arid areas as well as karst areas. The experiment elucidates the adaptive mechanism of drought resistance of S. davidii,reveals the drought resistance of S. davidii,and provides a certain reference basis for the all-round and three-dimensional industrial development and utilization of S. davidii in the western karst region.

Key words: Drought, Sophora davidii, Active oxygen metabolism, Osmotic regulation, Endogenous hormones

中图分类号:

S332.1

赵文武, 赵鑫, 谢文辉, 赵丽丽, 陈可可, 王普昶. 干旱胁迫下白刺花幼苗根系生长和生理特性的响应[J]. 草地学报, 2023, 31(1): 120-129.

ZHAO Wen-wu, ZHAO Xin, XIE Wen-hui, ZHAO Li-li, CHEN Ke-ke, WANG Pu-chang. Response of Root Growth and Development and Physiological Characteristics of Sophora davidii under Drought Stress[J]. Acta Agrestia Sinica, 2023, 31(1): 120-129.

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干旱胁迫下白刺花幼苗根系生长和生理特性的响应

Response of Root Growth and Development and Physiological Characteristics of Sophora davidii under Drought Stress

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