Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (1): 148-156.DOI: 10.11733/j.issn.1007-0435.2023.01.017

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Comprehensive Evaluation of Drought Resistance of Artemisia wellbyi Germplasm at the Seedling Stage

WANG Qi-yu1, LIU Huan1, RENZENG Wang-dui2, WANG Jing-long2, LUO Jian-min1, HUANG Ying1, Dong Kai1   

  1. 1. College of Pratacultural Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    2. Grassland Science Research Institute, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850000, China
  • Received:2022-07-13 Revised:2022-09-15 Online:2023-01-15 Published:2023-02-07

藏沙蒿种质材料苗期抗旱性综合评价

王绮玉1, 刘欢1, 仁增旺堆2, 王敬龙2, 罗建民1, 黄颖1, 董凯1   

  1. 1. 甘肃农业大学草业学院, 甘肃 兰州 730070;
    2. 西藏自治区农牧科学院草业科学研究所, 西藏 拉萨 850000
  • 通讯作者: 刘欢, E-mail:liuhuan@gsau.edu.cn;仁增旺堆, E-mail:RENZENGWang-dui13989036500@163.com
  • 作者简介:王绮玉(1994-),女,汉族,甘肃会宁人,硕士研究生,主要从事草原学研究,E-mail:wqy2199559164@163.com
  • 基金资助:
    西藏自治区重点研发及转化计划—西藏藏沙蒿和大籽蒿资源评价与应用技术研究(XZ201902 NB01);西藏自治区科技计划项目(XZ202201ZY0014 N);甘肃省自然科学基金(21 JR7RA824);草业生态系统教育部重点实验室开放课题(KLGE-2022-16)资助

Abstract: In order to evaluate the drought resistance of Artemisia wellbyi wild germplasm materials at the seedling stage,we selected thirteen Artemisia wellbyi germplasm materials collected from different habitats in Tibet as the research subjects. We used the potted water control method to simulate soil drought conditions and set no water stress as control,medium and severe drought stress treatments to study the effects of drought stress on the growth and physiological and biochemical characteristics of Artemisia wellbyi materials at the seedling stage. The drought resistance was comprehensively evaluated by combining principal component analysis and membership function. The results showed that under drought stress,the Relative conductivity (REC),Malondialdehyde (MDA),Peroxidase (POD),Superoxide dismutase (SOD),Catalase (CAT) activity,Proline (Pro) and Soluble sugar (SS) contents increased,and there were differences between different materials with SP content (P<0.05). The comprehensive evaluation concluded that the drought resistance of No. 11 material was the strongest,followed by No. 10 and No. 3 material,and No. 6 material was the weakest;it was suggested that No. 11,10,and No. 3 material of Artemisia wellbyi should be the first choice for ecological restoration and breeding research of Tibetan alpine desert grassland.

Key words: Artemisia wellbyi, Drought resistance, Principal Component Analysis, Membership Function, Comprehensive evaluation

摘要: 为评价藏沙蒿(Artemisia wellbyi)野生种质材料苗期抗旱性,以采自我国西藏地区不同生境的13份藏沙蒿种质材料为研究对象,采用盆栽控水法模拟土壤干旱条件,设置未胁迫CK、中度和重度3个干旱胁迫处理,研究干旱胁迫对藏沙蒿材料苗期生长和生理生化特性的影响,采用主成分分析和隶属函数相结合的方法对其抗旱性进行综合评价。结果表明:干旱胁迫下,供试藏沙蒿材料的相对电导率(Relative conductivity,REC)、丙二醛(Malondialdehyde,MDA)含量、过氧化物酶(Peroxidase,POD)、超氧化物歧化酶(Superoxide dismutase,SOD)以及过氧化氢酶(Catalase,CAT)活性和脯氨酸(Proline,Pro)、可溶性糖(Soluble sugar,SS)含量均增加,可溶性蛋白(Soluble protein,SP)含量不同材料之间存在一定差异性(P<0.05);综合评价认为11号材料抗旱性最强,10号和3号次之,6号材料抗旱性最弱;建议11,10和3号藏沙蒿材料作为西藏高寒荒漠草地生态恢复和育种研究的首选材料。

关键词: 藏沙蒿, 抗旱性, 主成分分析, 隶属函数法, 综合评价

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