A novel mechanism controls anther opening and closing in Paris polyphylla var. Yunnanensis

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 244-248
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11434-008-0507-y

摘要

a School of Information Science and Engineering, Yunnan University, Kunming 650091, China The phenomena of anther opening and closing in Paris polyphylla var. yunnanensis (Franch)Hand.-Mazz were described in detail, and the effects of ecological factors on those phenomena related to anther opening, closing and the fly-pollination mechanism were discussed. Anthers of P. polyphylla var. yunnanensls open in the morning and close in the evening every day during an over 20 days' pe-riod of anthesis. Light was detected as the main factor controlling this daily anther opening and closing.Anther opening can be reversed in response to rain and re-opens when rain stops. Relative humidity (RH) has a slight effect on anther opening and closing. Flower spans can be prolonged under labora-tory conditions. This novel behavior of anther is likely to be a mechanism to enhance the male fitness in this species, of which has no inherited structure to protect pollen from the perianth.