文献类型：期刊文献

英文题名：BREEDING SYSTEM AND POLLINATION BIOLOGY OF PAEONIA DELAVAYI (PEAONIACEAE), AN ENDANGERED PLANT IN THE SOUTHWEST OF CHINA

作者：Li, Kui[1,2,3] Zheng, Baoqiang[1,2,3] Wang, Yan[1,2,3] Zhou, Lin[1,2,3]

第一作者：Li, Kui

通信作者：Wang, Y[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[3]State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China

年份：2014

卷号：46

期号：5

起止页码：1631-1642

外文期刊名：PAKISTAN JOURNAL OF BOTANY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000347146500012)】；

基金：The authors thank the "863" Program (2011AA10020701) for the financial assistance and Professor Pei-yi Zhang for identifying the insects.

语种：英文

外文关键词：Ants; Beetles; Bees; Endangered plant; Flowering time; Breeding system; Paeonia delavayi; Pollination Biology; P/O ratio; Stigma receptivity

摘要：Breeding system and pollination biology of Paeonia delavayi (Peaoniaceae) from Shangri-La, Yunnan Province, southwest of China were studied. Flowering phenologies and flower visitors were observed or collected from 2008 to 2011. The pollen viability, stigma receptivity and pollination efficiency of different visitors were detected and tested. The florescence lasted for 6-9d in a single flower from mid-May to late June. A high percentage of flower damage promoted early anther dehiscence. Flowers started disseminating pollen at 1-2 d after flowering, and lasted for 5-6 d. Pollen viability could be preserved for more than 10 d at normal temperature. High seed rate from the stigma was observed at 1 d before flowering to 3d after flowering, and the dissemination hysteresis was defined as protogyny. The P/O ratios were 6,124 to 9,713:1, suggesting that the larger quantity of pollen to increased the seed setting rate. Three species of bees, eight species of beetles, seven species of syrphid flies, four species of ants, and three species of butterflies were observed on the flowers. P delavayi rewarded to the visitors by releasing fragrance, providing pollen and nectar. On the bodies of the visitors under stereomicroscope and scanning electron microscope (SEM), much pollen from the plants of similar flowering period inner community were found which indicated that these incompatible visitors were not species-specific pollinators. The bagging experiments showed that P delavayi was self-incompatible and no apomixes. Anemophily only played a minor role in the fertilization. A few seeds with poor plumpness can be produced by geitonogamy. Seed setting rate of artificial xenogamy was higher than natural pollination. Artificial control of the visitors' species showed bees being the most important pollinators. Beetles and ants participated in pollination to some extent and were unstable. Syrphid flies and butterflies were very unreliable with low pollination efficiency. Reproductive success depended largely on cross-pollination assisted by pollinator activities, especially the bees.