An ancient push-pull pollination mechanism in cycads

被引：23
|
作者：
Salzman, Shayla [1 ,2 ,3 ,5 ]
Crook, Damon [4 ]
Crall, James D. [1 ]
Hopkins, Robin [1 ,2 ]
Pierce, Naomi E. [1 ,3 ]
机构：
[1] Harvard Univ, Dept Organism & Evolutionary Biol, 26 Oxford St, Cambridge, MA 02138 USA
[2] Harvard Univ, Arnold Arboretum, Boston, MA 02131 USA
[3] Harvard Univ, Museum Comparat Zool, 26 Oxford St, Cambridge, MA 02138 USA
[4] USDA, APHIS, PPQ, CPHST,Otis Lab, Bldg 1398, Otis Angb, MA 02542 USA
[5] Cornell Univ, Sect Plant Biol, Sch Integrat Plant Sci, 502 Mann Lib, Ithaca, NY 14853 USA
来源：
SCIENCE ADVANCES | 2020年 / 6卷 / 24期
基金：
美国国家科学基金会;
关键词：
INSECT POLLINATION; AUSTRALIAN CYCAD; THRIPS POLLINATION; AFRICAN CYCAD; EVOLUTION; PHYLOGENY; CONE; VOLATILES; POLLEN; THERMOGENESIS;
D O I：
10.1126/sciadv.aay6169
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Most cycads engage in brood-site pollination mutualisms, yet the mechanism by which the Cycadales entice pollination services from diverse insect mutualists remains unknown. Here, we characterize a push-pull pollination mechanism between a New World cycad and its weevil pollinators that mirrors the mechanism between a distantly related Old World cycad and its thrips pollinators. The behavioral convergence between weevils and thrips, combined with molecular phylogenetic dating and a meta-analysis of thermogenesis and coordinated patterns of volatile attraction and repulsion suggest that a push-pull pollination mutualism strategy is ancestral in this ancient, dioecious plant group. Hence, it may represent one of the earliest insect/plant pollination mechanisms, arising long before the evolution of visual floral signaling commonly used by flowering plants.
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页数：9
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