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Influence of Light, Temperature and Salinity on the Seed Germination of Haloxylon ammodendron
Author(s): HUANG Zhenying1zhangxinshi1yitzchakgutterman2zhengguanghua3(1laboratoryofquantitativevegetationecology, INSTITUTE Ofbotany, CHINESE Academyofsciences, BEIJING 100093, p.r.china, 2 Bengurionuniversityofthenegev, jac
Pages: 275-
280
Year: 2001
Issue:
3
Journal: Acta Phytophysiologica Sinica
Keyword: 梭梭; 光照; 温度; 土壤盐分; 种子萌发; 萌发恢复;
Abstract: 梭梭是我国西北荒漠中分布的多年生植物 ,属中亚荒漠植被成分。其种子萌发的最适温度为 10℃ ,亚适宜温度为 15~ 2 0℃。从 2 0℃起 ,温度越高 ,萌发比率越低。种子无论在光下和暗中都能萌发 ,萌发率无显著性差异。浓度低于 0 .2mol/L的NaCl溶液对萌发的影响不大 ;但从 0 .8mol/L起 ,萌发率随着浓度增高而降低 ,直至为零。将在盐溶液中处理 9d的种子转移至蒸馏水后 ,原来较高浓度下的种子具有较高的萌发恢复率。不同浓度下的种子的萌发率和萌发恢复率要比蒸馏水中的低 ,表明NaCl处理后的部分种子永久地失去萌发力。
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