外来入侵植物粉花月见草的繁殖生物学特性

粉花月见草单花花期1d,整株花期50d左右;单花花粉量达8825个,花粉活力达53.2%,花粉萌发快,萌发率达44.6%,自花授粉;种子小,千粒重0.092g,种子发芽率达85%,萌发时间短,具有休眠机制。三年生株丛结果达1274个,单果种子高达206粒,单株丛种子量2.6×105。种子表面平滑,自然传播以重力为主和风力作用,传播距离在100cm范围内。结果表明:粉花月见草繁殖力、适应力强,易形成单一优势种群,种子小近圆形易形成种子库,人为活动使其远距离传播,具有较大的危害性。

Reproductive biology characterististics of invasive alien plant Oenothera rosea

Oenothera rosea is an invasive alien plant whose single flowering period is 1 d,while the whole flowering period is about 50 d.The quantities of single flower pollen is reached 8 825.The pollen vigor may be reached 53.2%.The high vitality makes the pollen germinate quickly and the germination rate can be reached 44.6%.This kind of plant is self-pollination,whose 1000-grain weight is 0.092 g.The seed germination rate is reached 85%,and the seed may germinate within very short time.The fruit quantity of three...