Portal de Periódicos da CAPES

Effect of light temperature and GA3 on the germination of Codariocalyx motorius seeds.

2009; Volume: 29; Issue: 12 Linguagem: Inglês

1000-4025

Li Yan, LI Sifeng, Qing Wang, Zou FengYing, Li Lianmei,

Allelopathy and phytotoxic interactions

Codariocalyx motorius is a rare interesting and medical species.To explore the underlying mechanisms relevant to the impediment in its sexual reproduction,and to provide the suit foundation for ex situ conservation and large-scale grow seedlings,we studied the effects and characteristics on germination of C.motorius seeds under the mechanical scarification,different temperature,light,GA3 and substrate.The results showed that mechanical friction made the C.motorius seeds a remarkably higher germinating energy,germination percentage and germinating index.Thus it followed that the mechanical inhibition resulting from the testa of C.motorius seeds was the direct reason why C.motorius seeds germinated at a low rate.Results showed that the optimum temperature was 25℃ and range was 20～30℃ for the germination of C.motorius seeds.In the 50～100 mg/L GA3,the germination percentage is higher,and the seedlings come out evenly,root system sturdy.In 30% sunshade percentage,germination speeds became quickly,and the germinating energy,germination percentage and germinating index is the highest.The substrate humus+peat(1∶1) was favorable for the germination of C.motorius seeds with seedling emergence rate reaching 85.9%.The germination method is economical and reasonable.