西北林学院学报2011，Vol.26Issue(5)：82-86,5.
干旱胁迫对破除硬实的苦马豆和披针叶黄华种子萌发影响
Impacts of Drought Stress upon Broken Hard Seeds of Swainsonia salsula and Thermopsis lanceolata
摘要
Abstract
Impacts of drought stress upon broken hard seeds of Sxvainsonia salsula and Thermopsis lanceolata were investigated. With the increment of the intensity of drought stress, the rates of water absorption and accumulated rate of water absorption of the two seeds decreased significantly. The starting time of seed germination delayed. The germination rate, index of germination and vigor index declined greatly. The lowest germination osmotic potential threshold the two seeds were 20% (PEG6000) and 10% (PEG6000) respectively. Quadratic equation fitted by the germination rate of T. Lanceolata seeds and 48 h accumulated absorbing water rate was y=~I. 666 7x2 + 19. 67 + 79. 286(R2=0. 882 9),and that of S. Salsula was y=4. 881x2-57. 622x+162. 71(R2=O. 896 7). Seedling height, root length, adventitious root a-mount and fresh weight of the two seeds were inhibited with the increment of drought stress. 5 % PEG could promote the root length and adventitious root growth of S. Salsula. Seedling dry weight, cotyledon nutrition convert rate and seedling saturated water content decreased with increment of drought stress. Seedling root dry weight and root/shoot ratio increased firstly, and then decreased. S. Salsula seed under drought stress couldn't germinate after rewatering. Germination of T. Lanceolata seed simulated with 20 % - 30% PEG after rewatering increased with increment of drought stress.关键词
苦马豆；披针叶黄华；发芽率；吸水率；干旱胁迫Key words
Sivainsonia salsula/ Thermopsis lanceolata I germination rates absorbing water rate/ drought stress分类
农业科技引用本文复制引用
王进,张勇,吕彪,陈广泉,颜霞..干旱胁迫对破除硬实的苦马豆和披针叶黄华种子萌发影响[J].西北林学院学报,2011,26(5):82-86,5.基金项目
甘肃省高校河西走廊特色资源利用省级重点实验室项目(XZ0602) （XZ0602）
河西学院硕士研究生导师科研项目(09002). （09002）
