干旱胁迫对不同居群豆茶决明种子萌发和幼苗生长的影响  

Effects of Drought Stress on Seed Germination and Seedling Growth of Different Populations of Cassia nomame

作　　者：李津 张建甫[2] 张茜茜 刘宥瑞 高慧 徐宁伟 徐兴友 白志英[1] LI Jin;ZHANG Jianfu;ZHANG Xixi;LIU Yourui;GAO Hui;XU Ningwei;XU Xingyou;BAI Zhiying(College of Life Sciences,Hebei Agricultural University,Baoding 071001,China;Urban Construction School,Beijing City University,Beijing 101309,China;Pisa Marine Graduate School,Zhejiang Ocean University,Zhoushan 316022,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;College of Marine Resources&Environment,Hebei Normal University of Science&Technology,Qinhuangdao 066600,China)

机构地区：[1]河北农业大学生命科学学院,河北保定071001 [2]北京城市学院城市建设学部,北京101309 [3]浙江海洋大学比萨海洋研究生学院,浙江舟山316022 [4]石家庄铁道大学土木工程学院,石家庄050043 [5]河北科技师范学院海洋资源与环境学院,河北秦皇岛066600

出　　处：《热带农业科技》2025年第2期79-85,共7页Tropical Agricultural Science & Technology

基　　金：河北省自然科学基金(C2022204036);华北作物改良与调控国家重点实验室自主研究课题(NCCIR2020ZZ-18)。

摘　　要：为探明不同居群豆茶决明种子萌发和幼苗对干旱胁迫的耐受性,采用不同浓度PEG-6000溶液模拟干旱胁迫,研究干旱胁迫对豆茶决明种子萌发及幼苗保护酶活性、MDA含量的影响。结果表明:随PEG-6000浓度的增加,5个居群豆茶决明种子萌发指标、成苗率、胚根和下胚轴长度均呈下降趋势;15%PEG-6000对青龙、迁西居群豆茶决明的发芽率无显著影响,10%PEG-6000对遵化、宽城、兴隆居群豆茶决明的发芽率无显著影响,不同浓度PEG-6000对遵化、迁西豆茶决明的发芽势、发芽指数及成苗率均影响显著。随着PEG-6000胁迫浓度升高,5个居群豆茶决明幼苗根、茎、叶的SOD、POD、CAT活性均呈先升高后下降的趋势,MDA含量整体呈上升趋势。豆茶决明具有一定耐旱能力,高浓度PEG-6000胁迫下豆茶决明种子萌发和幼苗生长受到抑制。In order to explore the physiological changes in Cassia nomame during seed germination and seedling development under drought stress,different concentrations of PEG-6000 were used to simulate drought stress.Germination and growth indicators,autioxidant enzyme activities and malondialdehyde content of 5 populations of Cassia nomame were determined.The results showed that with the increase in PEG-6000 concentrations,the germination and growth indicators decreased under drought stress.No significant change in germination rate was detected under 15% PEG-6000 treatment in Qinglong and Qianxi populations.No significant change in germination rate was detected under 10% PEG-6000 treatment in Zunhua,Kuancheng and Xinglong populations.Significant change in germination potential,germination index and seedling rate was detected under PEG-6000 treatment in Zunhua and Qianxi populations.With the increase in PEG-6000 concentrations,the SOD,POD and CAT activities increased first and then decreased under drought stress.The malondialdehyde content increased with the increase in PEG-6000 concentrations.The results indicated that Cassia nomame is partially drought tolerant.PEG-6000 at higher concentrations inhibits seed germination and seedling growth of Cassia nomame.

关 键 词：豆茶决明 干旱胁迫 种子 萌发特性 幼苗生长 

分 类 号：S567.219[农业科学—中草药栽培]