小毛茛(Ranunculus ternatus Thunb.)花粉流潜能初探

在自然居群中对小毛茛传粉机制与距离作了观测，并对开花后花粉萌发能力的变化作了研究，结果是：该种兼具虫媒或风媒传粉机制，以虫媒传粉为主；传粉距离多数局限于２ｍ以内，但不排除远距离传粉的可能性；体外萌发试验表明，该种花粉萌发率在开花第一天甚低，开花后２４ｈ达到最高值。作者推测，小毛茛花粉以近距离散布为主，但具有远距离传播的潜能。

A primary research on potential of pollen flow in Ranunculus ternatus Thunb

The pollination mechanism and pollen flow of Ranunculus ternatus Thunb. were observed and detected in natural populations, the variation of Pollen germination during the processof flowering was studied quantitatively. The results are as follow: The Pollen flow can be mediatedby anemophilous or entomophilous Pollination, but insect Pollination should be in the ascendant.The distances of Pollen movements are frequently more near than 2 meters, but the possibility offather movements of pollen could not be excluded. The rate of pollen germination is quite low inthe first day of bloom, but 24 hours after flower opening, this rate arrives at the highest value. Theauthors deduce that, the pollen of individuals in a Population of R. ternatus are spread to their nearneighbors, but the potential of long-distance pollination can occasionally occur.