西南林业大学学报2017，Vol.37Issue(4)：15-21,7.DOI:10.11929/j.issn.2095-1914.2017.04.003
榕属4种植物种子萌发对P EG模拟干旱胁迫的响应
Seed Germination of 4 Ficus Species Under Drought Stress Simulated by PEG
摘要
Abstract
0%, 5%, 10%, 20%and 25%PEG-4000 solutions were used to simulate drought stress conditions for the germination and growth of seedling in 4 Ficus species (Ficus racemosa, F. tinctoria, F. hispida, F. auriculata), which naturally grow in Xishuangbanna, Yunnan, to explore the effect of drought stress and the difference of drought resistance among those 4 species. The results showed that drought has significant effect on the germination process for all species in our experiments. As the water stress aggravated, the germination rate, germination poten-tial, germination index and vigor index all significantly declined for both F. auriculata and F. racemosa, while there was no significant relationship between PEG concentration and above indices for both F. tinctoria and F. hispida. The results of seedling growth showed that the radical and plumule length did not change with PEG concentration in F. tinctoria. For F. hispida and F. auriculata the radical length decreased with the water stress going up, while PEG concentration had significantly adverse effects on both radical and plumule length for F. racemosa. Furthermore, the effect of PEG concentration on different indices was significantly different among species.关键词
榕属/抗旱性/萌发特性/种子/PEG胁迫Key words
Ficus/drought resistance/germination features/seed/PEG stress分类
农业科技引用本文复制引用
古旭,张锦堂,陈琛,吴华锐,王亮,赵洁,张媛..榕属4种植物种子萌发对P EG模拟干旱胁迫的响应[J].西南林业大学学报,2017,37(4):15-21,7.基金项目
国家自然科学基金项目 (31560116) 资助 （31560116）
西南林业大学科学研究基金面上项目 (XL21615) 资助. （XL21615）
