贮藏条件对河西走廊四种旱生灌木种子萌发的影响  

Effects of storage condition on seed germination of four xeromorphic shrub species from Hexi Corridor

作　　者：王桔红[1,2] 陈文[1,3] 张勇[1] 张银霞[1] 

机构地区：[1]河西学院生态研究所,甘肃张掖734000 [2]兰州大学干旱与草地生态教育部重点实验室,兰州730000 [3]甘肃省张掖师范学校,甘肃张掖734000

出　　处：《生态学杂志》2011年第3期477-482,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31040009);甘肃省自然科学基金项目(1010RJZG204);甘肃省高校河西走廊特色资源利用省级重点实验室基金项目(XZ1013);河西学院校长基金项目资助

摘　　要：不同贮藏条件下,探讨了河西走廊枸杞(Lycium barbarum)、黑果枸杞(L.rutheni-cum)、花棒(Hedysarum scorpaium)和泡果白刺(Nitraria sphaerocarpa)4种旱生灌木种子萌发情况。结果表明:枸杞、黑果枸杞和花棒种子萌发对贮藏条件有一致性的响应,即经过低温湿润(-5℃和4℃)贮藏后有较高的萌发率、较快的萌发速度和较早的萌发开始时间,贮藏条件对泡果白刺的种子萌发(<30%)的影响较小;冬季冷屋贮藏后(-5℃,湿润)的枸杞种子萌发率(68%)显著大于冰箱贮藏(4℃,湿润)和室温干燥贮藏(<20%);冰箱和冬季冷屋贮藏后黑果枸杞种子萌发率约80%,室温干燥贮藏后萌发率仅为5%;冰箱和冬季冷屋贮藏后的花棒种子萌发率达到88%和65%,干燥贮藏后为40%。低温层积(-5℃和4℃)是打破枸杞、花棒和黑果枸杞种子休眠的有效方法之一。The seed germination responses of Lycium chinense,L.ruthenicum,Hedysarum scorpaium,and Nitraria sphaerocarpa from Hexi Corridor were examined after stored in a cold room（-5 ℃,moist）during winter,in a refrigerator（4 ℃,moist）for 65 days,and at room temperature（20 ℃,dry）for 6 months.The seeds of L.barbarum,L.ruthenicum,and H.scorpaium after stored moist at-5 ℃ and 4 ℃ had higher germination percentage and rate,and an earlier time to the onset of germination,compared with those stored dry at room temperature.The germination percentage of L.ruthenicum seeds was 80% after stored moist in the cold room and in the refrigerator,and only 5% after stored dry at room temperature.88% and 65% of H.scorpaium seeds germinated after stored moist in the cold room and in the refrigerator,respectively,and 40% of them germinated after stored dry at room temperature.L.barbarum seeds had a germination percentage of 68% after stored moist in the cold room,but of less than 20% after stored humid in the refrigerator and at room temperature.Storage condition had no significant effects on the seed germination of N.sphaerocarpa,and the maximum germination percentage in all storage treatments ranged from 18% to 27%.Therefore,cold stratification（-5 ℃ and 4 ℃）could be an efficient method to break the seed dormancy for L.barbarum,L.ruthenicum,and H.scorpaium,but not for N.sphaerocarpa.

关 键 词：旱生灌木 低温层积 种子萌发 休眠 

分 类 号：Q948[生物学—植物学]