新疆贝母属植物种子破除休眠过程中的外源及内源因子的协同响应特征

新疆不仅是中国贝母属的种类多样性中心之一，且特有程度高，分布区多狭窄。多种作为新疆药用贝母替代品，承载资源压力大，也是极具潜力的球根花卉，因此，有必要及时开展引种驯化相关研究以保护这一珍贵种质资源。本研究拟以新疆贝母属植物为研究对象，通过对种子休眠类型的划分，将种子破除休眠过程中区分为胚形态建成阶段及生理后熟阶段，对不同萌发阶段中的外部胚形态分化、结构变化、种皮及胚乳作用等外源性因子及内源激素的变化、生理变化等内源性因子进行系统分析，阐明这些因子在种子破除休眠过程中的协同作用机制及种子萌发启动机理。研究结果可为打破贝母属种子休眠、提高种子萌发率、缩短后熟期研究提供依据，为该属的引种驯化及种质保育提供重要的理论指导。

Xinjiang is one of the species diversity center of Fritillaria in China, with characteristics of specific species and narrow distribution. Because most species were used as alternatives of medicinal Fritillaria in Xijiang, the species are faced with big resource pressure. Fritillaria also has high ornamental value as bulb flower. Therefore, it is necessary to conduct research about introduction to conserve germplasm resources. In this study, plants of the genus Fritillaria in Xinjiang will be study. which will be classify into different types of seed dormancy. Through the analysis of embryo morphological construction, seed structure changes, endogenous hormone and other factors in two stages, embryonic morphogenesis and physiological stage of ripening stage, the mechanism for breaking the dormancy of seeds will be clarified. Results will help to improve seed germination rate, shorten the ripening period and so on, and provide important theoretical guidance for introduction and conservation of the genus.