Progresses in Seed Dormancy and Dormancy-Breaking Mechanism of Tilia Seed at Home and Abroad

Reasons of seed dormancy and mechanism of Tilia L. seeds dormancy-breaking were summarized in this paper. Husk obstruction,inhibitor,incomplete development of embryo and after-ripening of seed physiology were the causes of seed dormancy of Tilia L.. On the basis of that,the methods of breaking dormancy included physical treating methods,chemical treating methods and comprehensive treating methods,the mechanism of dormancy-breaking was revealed. It would be useful for future research in the research of germplasm resources preservation and seedling of Tilia L.,the development and utilization development of landscaping and afforestation of Tilia L. were scientifically and rationally.