allogamy

1. Most plants are hermaphrodite, but have mechanisms such as self-INCOMPATIBILITY that promote allogamy.
   许多植物是雌雄同体的，但它们存在自交不亲和的机制，从而促进异花受精。
2. Though the ratios of fruit set are not same, the quality of seeds got from allogamy is better. Cross-pollination is the main pattern, but the highest ripening rate was spontaneous pollination of Polygonum capitatum Buch.-Ham.
   不同授粉方式虽在座果率上无明显差异，但异花授粉可明显提高天麻种子的质量。异花授粉为头花蓼的主要授粉方式，其中自然授粉的结实率最高。

noun

1. cross-fertilization in plants