植物生长调节剂和盐度对驼绒藜属植物——绵毛优若藜种子发芽功能的影响  

Action of Plant Growth Regulators and Salinity on Seed Germination of Ceratoides lanata

作　　者：常虹[1,2] 

机构地区：[1]中国科学院内蒙古草业中心,内蒙古呼和浩特010031 [2]内蒙古农牧业科学院,内蒙古呼和浩特010031

出　　处：《畜牧与饲料科学》2012年第11期151-156,共6页Animal Husbandry and Feed Science

摘　　要：绵毛优若藜[Ceratoides lanata(Pursh)J.T.Howell]是一种灌木,具有一年生小枝,属于藜科,广泛分布于美国犹他州北部盐碱沙地。其种子没有休眠性,大约90%的种子在非盐碱土条件下发芽。其种子发芽率随盐度的增高而下降,超过10%的种子在900mmol/L氯化钠中可以发芽,且几乎所有的种子在不到24h内发芽,超出这个时间段后不再有种子发芽。赤霉酸不能缓解盐度对绵毛优若藜种子发芽产生的影响,而激动素和壳梭孢(菌)素可以大大减轻盐分对其发芽的影响,乙烯利能够完全缓解盐胁迫对绵毛优若藜种子发芽的影响。Ceratoides lanata （Pursh） J. T. Howell is a shrub with numerous annual branehlets from the Chenopodiaceae family and is widely distributed in brackish water playas of northern Utah. Seeds had no dormancy, and about 90% of the seeds germinated in nonsaline control. Seed germination decreased with the increase in salinity,and more than 10% of the seeds germinated at 900 mmol/L NaC1.Almost all seeds germinated in less than 24 h, and no additional seed germinated after this time. Gibberellic acid had no effect in alleviating salinity effects;however, kinetin and fusicoccin substantially alleviated the effect of salinity on germination, while ethephon almost completely reverted the effect of salinity.

关 键 词：绵毛优若藜 赤霉酸 乙烯利 壳梭孢(菌)素 盐生植物 激动素 

分 类 号：S54[农业科学—作物学] Q949.745.1[生物学—植物学]