干旱和温度胁迫对广州相思子种子萌发的影响  

Effects of Drought and Temperature Stress on Seed Germination of Abrus cantoniensis

作　　者：朱艳霞[1] 黄燕芬[1] ZHU Yan-xia;HUANG Yan-fen(Guangxi Botanical Garden of Medicinal Plants,Guangxi Key Laboratory of Medicinal Resources Protection and Genetic Improvement,Narming 530023,China)

机构地区：[1]广西壮族自治区药用植物园,广西药用资源保护与遗传改良重点实验室,广西南宁530023

出　　处：《现代中药研究与实践》2018年第6期4-8,共5页Research and Practice on Chinese Medicines

基　　金：广西自然科学基金项目(2015GXNSFBA139109);公益性行业科研专项经费项目(201507002)

摘　　要：目的研究低温和干旱胁迫对药用植物广州相思子(Abrus cantoniensis)种子萌发和幼苗生长的影响。方法以聚乙二醇(PEG6000)模拟干旱,测定发芽率、发芽势、发芽指数等指标。结果低温(15℃、20℃)和干旱(PEG浓度5%～30%)相互作用时,发芽率随PEG浓度的增加而逐渐降低。较高温(25℃、30℃、35℃)和干旱(PEG浓度5%～30%)相互作用时,发芽率随PEG浓度的增加呈现先升高后降低的趋势,5%和10%的PEG可显著提高广州相思子种子发芽率。结论低温条件下广州相思子种子抗旱能力差,适宜温度条件下种子具有较强的抗旱能力。Objective To study the effects of low temperature and drought stress on seed germination and seedling growth of Abrus cantoniensis. Method Polyethylene glycol(PEG6000) is used to simulate drought, and the germination rate, germination potential and germination index were determined. Results When the interaction between low temperature(15 ℃ and 20 ℃) and drought(the concentration of 5 % ~ 30 % PEG), the germination rate gradually decreases with the increase of PEG concentration. When the high temperature(25 ℃, 30 ℃, 35 ℃) and drought interaction, the germination rate increase with the increase of PEG concentration and then decreased, 5% and 10% PEG significantly increased the seed germination rate. Conclusion Under low temperature, the seeds of Abrus cantoniensis have poor drought resistance, and the seeds have strong drought resistance under suitable temperature.

关 键 词：水分胁迫 温度 种子萌发 广州相思子 鸡骨草 

分 类 号：R282[医药卫生—中药学]