水土保持研究2011，Vol.18Issue(1)：188-191,4.
湿地松种子萌发对模拟水分胁迫的响应
Responses of Germination of Pinus Elliottii Seeds to Simulating Water Stress
摘要
Abstract
The artificial water stress treatment was conducted with polyethylene glycol (PEG-6000) hypertonic solution, so that we can find the response of seeds of Pinus elliottii to water stress. The results indicate that: with water stress increased, P. elliottii seed germination rate, relative germination rate, germination potentiality, germination index, seedling shoot length and root length, biomass had a decreasing tendency in different degrees; By established linear regression equation of seed germination under water stress, we can predict the drought tolerance critical value is -0. 68 MPa and limited value is -1.14 MPa; The water stress had great impact on seed germination of P. elliottii early and will delay its germination time ranging from 1～8 d, respectively; The root of P. elliottii had a more stable growth under light water stress, showing adaptability to drought. When the concentration of PEG-6000 decrease to -0. 8 MPa, the P. elliottii seed can not sprout into seedlings, aimed to adapt to drought environment, under -1.07 MPa the biomass decreased to 0 directly.关键词
湿地松/聚乙二醇/水分胁迫/种子萌发分类
农业科技引用本文复制引用
张聃,曹昀,郑林..湿地松种子萌发对模拟水分胁迫的响应[J].水土保持研究,2011,18(1):188-191,4.基金项目
国家科技支撑计划"沙化土地与水土流失区治理技术研究与示范(2007BAC23B03)" （2007BAC23B03）
