积雪处理和室内干燥贮藏对6种荒漠植物种子活力的影响

以古尔班通古沙漠6种荒漠植物种子为材料,以同期收获室内干藏种子为对照,研究了3种积雪处理对其种子活力的影响.结果表明,积雪处理造成灰绿藜和驼绒藜种子萌发率显著下降,且导致积雪处理后灰绿藜未萌发种子丧失活力而死亡,诱导驼绒藜未萌发种子部分进入休眠并造成一定数量种子丧失活力;对雾冰藜和驼绒藜种子萌发率影响不显著,未诱导2种植物未萌发种子进入休眠或造成种子死亡;未能解除小车前和亚麻芥种子休眠,但能使大多数未萌发种子保持活力.

Effect of Snow Thickness and Dry Storage at Room Temperature on Seed Vigor of Six Desert Species From the Gurbantunggut Desert of China

We investigated seed germination of six desert plant species of the Gurbantunggut Desert of China through snow treatment and dry storage at room temperature to better understand seed germi-nation and dormancy characteristics and how these species are adapted to the change of snow thick-ness .There are three types of seed responses to snow treatment :the germination percentage of seeds of Chenopodium glaucum and Peganum harmala significantly decreased 0 ,100% and 200% snow thickness treatment ,meanwhile led to un-germinated seed vigor of Chenopodium glaucum loss and in-duced dormancy of un-germinated seeds of Peganum harmal ;Germination of seeds of Bassia dasyphylla and Ceratoides lateens slightly decreased with three snow treatments ,and did not lead to dormancy or vigor loss of un-germinated seeds of two species ;Seeds of Plantago minuta and Cameli-na sative had dormancy ,but kept seed vigor of their un-germinated seeds .