米槁种子休眠原因的初步研究

A Preliminary Study on the Causes of Seed Dormancy of Cinnamomum Migao

摘要: 目的：研究米槁种子休眠的原因。方法：在以往的研究中，我们用一定浓度的双氧水处理米槁果实，可使米槁种子的发芽率从零提高到百分之四十多。以此为依据，通过比较双氧水处理前后米槁果实化学成分的变化，确定了米槁果实中抑制种子萌发的化学成分。并通过验证实验证明，这些成分对种子萌发起到了抑制作用。结果：用双氧水处理米槁果实后，有6种化学成分完全消失。结论：第一，抑制米槁种子萌发的化学成分不是一种，而是多种，他们存在于米槁果实的挥发油中；第二，双氧水可以破坏部分抑制种子萌发的化学成分，从而提高米槁种子的发芽数，这些容易被双氧水破坏的化学成分是：2,3-Dehydro-1,8-Cineale，Cis-Sabinene hydrate，β-Cubebene，α-Humulene，α-Gurjunene，Ledene。他们可能全部或部分参与了抑制种子萌发的作用。

Abstract: Objective: To research the reason of seed dormancy in Cinnamomum Migao. Method: We use certain concentration of hydrogen peroxide treatment Migao fruit, it can make Migao seed germination rate increased from zero to more than forty percent. On the basis of this, the changes of chemical constituents in the fruit of Migao were compared before and after treatment with hydrogen peroxide. The chemical constituents in the fruit of Migao were determined to inhibit the seed germination. And verification experiments show that these components play an inhibitory effect on seed germination. Result: After hydrogen peroxide treatment Migao fruit, there are six kinds of chemical composition completely disappeared. Conclusion: First, inhibition of Migao seed germination chemical composition is not one, but many, they exist in the meter Migao volatile oil; Second, hydrogen peroxide can destroy partially inhibited seed germination chemical composition, thereby increasing the number of Migao seeds germinate. These easily destroyed chemical compositions of hydrogen peroxide are 2,3-Dehydro-1,8-Cineale, Cis-Sabinene hydrate, β-Cubebene, α-Humulene, α-Gurjunene, and Ledene. They may be all or part participated in the inhibition of seed germination.