某些品种不能自花授粉。
Certain varieties cannot be fertilized with their own pollen.
它们保持正常的自花授粉繁殖。
第二，小麦植株上的繁殖部位离得很近，所以小麦更倾向于自花授粉。
Second, the reproductive parts of the wheat plant are close together, so wheat tends to self-pollinate.
具花植物除少部分自花授粉外，其花粉传递通常依赖于一定的传粉媒介。
With flowering plants with only a small part of the self-pollination, the transfer of its pollen is usually dependent on certain pollinators.
是一种避免自花授粉的机制，在风媒花和非专性虫媒花中最为普遍，比方说玄参。
It is a mechanism that helps prevent self-pollination and is most common among wind-pollinated and unspecialized insect-pollinated flowers, as in figwort.
广玉兰的雌性先熟是通过主动控制花药开裂时间，降低雌雄功能干扰，有效减少自花授粉。
Protogyny in M. grandiflora lies in a mechanism that determines the anther dehiscence stage, thus reducing self-pollination and interference between pollen and stigmas.
番茄可以自我繁衍，不需要传粉者，但是如果有蜜蜂来传播花粉，这种自花授粉的植物也会得到帮助。
Tomatoes are able to fertilise themselves, without need of a pollinator, yet even this self-pollination can be assisted by a bee visiting a flower.
采用气相色谱法对不同品种自花授粉后到第一次生理落果期梨雌蕊组织或幼果中的IAA、ABA含量变化进行了研究。
We used gas chromatography to study the quantity of IAA and ABA in pear young fruits of different varieties from self-pollination to first physiological fruit-falling period.
CTX处理柱头后自花授粉对自花花粉管的生长具有促进作用；而PTX处理柱头后异花授粉，表现出对异花花粉管生长的抑制作用。
Self-pollen tube growth could be promoted by treating stigma with CTX, but the pollen tube growth was inhibited by treating stigma with PTX before cross pollination.
CTX处理柱头后自花授粉对自花花粉管的生长具有促进作用；而PTX处理柱头后异花授粉，表现出对异花花粉管生长的抑制作用。
Self-pollen tube growth could be promoted by treating stigma with CTX, but the pollen tube growth was inhibited by treating stigma with PTX before cross pollination.
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