驼绒藜属牧草种子生理学特性的研究--营养成分、植物激素与种子活力相关性分析

本论文对驼绒藜属植物种子的生理学特性进行了研究,包括种子的活力、种子的营养成分、激素水平等内容,同时对种子的劣变机理进行了探讨.驼绒藜属牧草种子在营养成分及激素含量上存在种间、生态型间及株龄间的差异,相关分析表明,种子含糖量及内源激素与种子活力相关性均不显著,种子氮、磷含量与种子活力有显著的相关性.对驼绒藜属植物种子短命和劣变原因的初步分析,认为是由遗传和环境两方面的原因所至,一是由于驼绒藜植物属于高数量低营养种子类型,种子自然寿命较短;二是由于种子发育过程中自然环境恶劣,造成种子营养不良,发育程度较差;三是由于贮藏条件不适宜,尤其是含水量较高,造成种子劣变加速.

Studies on Seed Physiological characteristics of Ceratoides (Tourn.) Gagnebin--The correlation between the nutritive composition,the hormone and seed vigor

The thesis studied on the physiological characteristics of Ceratoides L. The contents were composed of the seed vigor, the nutritive composition, the hormone content, and the deterioration mechanism of seed was studied as well. The nutritive composition and hormone contents of seed existed differences between Species, ecotypes or plants with different age. The correlation between sugar content and seed physiological activity was not obvious, while N, P contents and seed physiological activity obviously correlated. The deterioration of seed was due to two reasons which were genetic factor and environmental factor; First, the Ceratoides.L seed belongs to low nutrition seed and its nature longetivity was short; second, because of the harsh environment during seed developing, seeds were short of nutrition and the development were uncomplete; Third, because of the unsuitable storage condition, especially because the water contens was higher, the seed deteriorated rapidly.