稀有植物云南金钱槭的种子休眠与解除

Seed Dormancy and Breaking of Rare Plant in China Dipteronia dyeriana Henry

云南金钱槭果实各部分水浸提液含有内源抑制物，种子吸水性良好，果皮和种皮结构复杂，赤霉素（GA3）和变温（10～20℃和15—25℃）不能解除种子休眠，而低温（6℃）条件下：种子培养150d，萌发率达到98％；果实培养260d，有58％的种子萌发。刮开种子胚芽处少许种皮，6、15℃和25℃条件下培养60d，种子萌发率分别达78％、38％和76％。云南金钱槭种子具有深休眠特性。

The water extract ofDipteronia dyeriana fruits contained an intrinsic germination inhibitor. However, the structure of peel and seed coat were complex. GA3 and alternating temperature （10 -20 ℃ and 15 - 25 ℃ ） could not break seed dormancy. But under constant low temperature （6 ℃）, the germination percentage reached 98% when seeds were cultured for 150 days, and 58% when fruits were cultured for 260 days. After scraping part of seed coat on the embryo under 6℃, 15 ℃and 25 ℃cultured seeds for 60 days, germination percentage were 78% ,38% and 76% individually. The results showed that seeds ofD. dyeriana were deep dormancy.