牛耳朵传粉生物学研究
Pollination biology of Primulina eburnea
摘要
Abstract
Primula Hance ( Gesneriaceae ) is a group that has attracted much attention in recent years. Its intricate species diversity and its endemic distribution among species have aroused great interest among taxonomists and botany researchers. Except for a few species, like Primulina eburnea ( Hance) Y. Z. Wang, most species have a very narrow distribution range, which belong to narrow distribution species or endemic species. In order to reveal the effects of the pollination biology and breeding system of P. eburnea on its reproductive process and colonization ability, we systematically studied the flowering phenology, the pollen and stigma viability, the species and visiting behavior of flower visiting insects, the pollen ovule ratio, the OCI index and the seed setting rate of manipulated pollination of P. eburnea. Besides, we explored whether its reproductive processes such as pollination had a positive effect on the spread of P. eburnea. The results showed that the natural flowering stage of P. eburnea was from March to May, and the entire flowering stage was about 45 d. Its full flowering stage was about 20 d, and the single flower flowering stage was 6-8 d. Pollens had the strongest viability 1-2 d after flowering, stigma did not have receptivity before flowering. The pollen ovule ratio was 537, and the hybridization index was 5. Bagged and emasculation could not bear fruit, indicating that this species did not have apomixis. Compared with natural pollination, the seed setting rate of hand self-pollination was slightly lower, and the seed setting rate of hand xenogamy was slightly higher, indicating self-compatibility. The main pollinators of P. eburnea were Anthophora florea and Bombus sp. Therefore, higher nectar volume, larger pollen amount and stronger pollen viability of P. eburnea were obviously beneficial for it to complete the entire process of pollination and reproduction. This result was obviously conducive to the colonization of P. eburnea and then widely spread in the karst areas of South China to Southwest China.关键词
报春苣苔属/传粉/繁育系统/喀斯特地貌/广域分布Key words
Primula Hance/pollination/breeding systems/karst landform/eurychoric distribution分类
农业科技引用本文复制引用
王子琪,黄石连,洪欣,温放..牛耳朵传粉生物学研究[J].广西植物,2021,41(5):671-683,13.基金项目
安徽省自然科学基金(1908085QC1) （1908085QC1）
安徽省教育厅重点项目(KJ2017A022) （KJ2017A022）
安徽大学博士启动基金 （）
广西喀斯特植物保育与恢复生态学重点实验室基金(19-050-6) （19-050-6）
国家自然科学基金(31860047) （31860047）
广西自然科学基金(2017GXNS FAA198006) （2017GXNS FAA198006）
广西科技计划项目(桂科AD20159091) （桂科AD20159091）
世界苦苣苔科协会EMREF奖学金和安徽大学大学生创新创业训练计划项目[Supported by Natural Science Foundation of Anhui Province(1908085QC1) （1908085QC1）
Key University Science Research Project of Anhui Province(KJ2017A022) （KJ2017A022）
Anhui University Doctor Startup Fund （）
Fund of Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain(19-050-6) （19-050-6）
the National Natural Science Foundation of China(31860047) （31860047）
Natural Science Foundation of Guangxi(2017GXNSFAA198006) （2017GXNSFAA198006）
Guangxi Science and Technology Project(Guike AD20159091) （Guike AD20159091）
EMREF Scholarship Award of the Gesneriad Society and Undergraduate Innovation and Entrepreneurship Training Program]. （）
