中国无忧花种子发芽特性研究

Germination Characteristics of Saraca dives Pierre Seeds

对广西钦州市树龄28年的中国无忧花母树采种后进行发芽试验,结果发现,所采种子千粒重为7235.6 g,其中约2/3的种子在种皮表面存在皱缩、不平整等异常情况,可能是在种子发育过程中受到昆虫或菌类危害造成的。发芽试验表明,河沙更适合中国无忧花种子育苗。明显受损伤的中国无忧花种子发芽率低,而依据种皮外观对种子进行分检,发芽率可提高至72.0%。对种子萌发的形态学变化进行观察,发芽过程明显可分为吸胀、生根、发芽和成苗4个阶段。建议除了加强中国无忧花实生苗繁育的相关技术研究外,应加快其植物组织培养技术体系的建立和完善,尽快实现种苗的标准化、规模化繁育。

Germination experiment was tried on the seeds from 28-year-old trees in Qinzhou,Guangxi.The results showed that 1000-kernel weight was 7235.6 g,but nearly two-thirds of the seed coats seemed abnormal,such as wrinkled and rough.Very likely it was caused by insects or fungus during the development of the seeds.The germination experiment showed that fresh water sand was better for seed-breeding of S.dives Pierre.The germination percentage of the injured seeds was low.But the breeding efficiency could be improved to 72.0%when seeds had been separated according to the seed coats.According to the morphological changes of the germination process,it could be obviously divided into four stages:dormant,development,rooting and seedling stage.It was suggested that the related research on seedling propagation should be improved.And more importantly,the research on plant tissue culture technology should be also accelerated,so that the standardized and mass production of seedlings could become true sooner.