江西农业大学学报Issue(3)：497-503,7.DOI:10.13836/j.jjau.2015077
珍稀濒危植物蛛网萼的种子形态及萌发特性
The Morphological Structure and Germination Characters of Seed of Rare and Endangered Species Platycrater arguta
摘要
Abstract
In this paper the biological characteristics of Platycrater arguta seed germination were studied aiming to understand the underlying mechanisms relevant to the impediment in the regeneration of P.arguta population.Base on the analysis of the anatomical structure of the seeds and seed coats,the effects of different temperature,storage time and different concentrations of GA3 on the germination of P.arguta.were studied.Sim-ulation test results showed that GA3 exhibited promotion effect on the seed germination,high germination rate and early germination time were achived with high GA3 concentration (1 000 mg/L).25℃ was the optimal temperature for the seed germination of P.arguta.But along with extended cold storage time,the seed germi-nation rate decreased.To sum up the above results,the immediate causes that made it difficult for the natural populations of P.arguta to regenerate may be inferred as follows:the small size of seeds would impose restric-tion for its success in competition with other plant species;the seeds of P.arguta germinted slowly even under optimum conditions,and the germination velocity was low,and the germination was uneven;the germination had high requirement of temperature,light and moisture;seed coat hindered seed germination.All the above might be the main causes for the endangerment of the species.关键词
蛛网萼:种子/形成结构/萌发特性/濒危机制Key words
Platycrater arguta/seed/the formation of structure/germination characteristics/endangerment mechanism分类
农业科技引用本文复制引用
张丽芳,林昌勇,俞群,揭正平,郭龙清,裘利洪..珍稀濒危植物蛛网萼的种子形态及萌发特性[J].江西农业大学学报,2015,(3):497-503,7.基金项目
国家科技支撑计划课题（2012BAC11B02）和江西铜钹山自然保护区综合科学考察项目 （）
