Abstract

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Author(s):: WANG Yanyan; ZHANG Chengcheng; ZHU Minjia; JIANG Xuelian; RUAN Xiao; HUANG Junhua; (College of Forestry and Horticulture,Xinjiang Agricultural University,Urumqi,Xinjiang 830052)

Keywords:: Fritillaria meleagroides; seeds; dormancy; endogenesis inhibitors

Abstract:: Fritillaria meleagroides was taken as materials,the seed morphology was observed under scanning electron microscope.The viability of seeds was measured by TTC method.The moisture content of seeds was measured by oven weighing,the soaked seeds were used to test water permeability.The bioassay was applied for detecting the germination inhibitors.The changes of embryo and germination was observed by microscope.In order to understand the reason for seed dormancy and its particularity of Fritillaria meleagroides.The results showed that there were a lot of small stoma in the seed wing of the F.meleagroides under scanning electron microscope,and the seed coat was as thin as cicada′s wings.The water absorption of F.meleagroides seeds was more than 100% after being soaked for 2 hours.All of aqueous extract inhibited the germination and growth of Chinese cabbage.The change of embryo rate and the germination of seeds showed that the embryo development was not complete.Thus,there was no waterabsorbing barrier in F.meleagroides seed coat.F. meleagroides did not belong to the Fritillaria L.with mature embryo.Because the embryo was not fully developed,there was morphological dormancy,and the germination inhibitor leaded to physiological dormancy.