Muhlemann Joëlle K, Waelti Marc O, Widmer Alex, Schiestl Florian P
Plant Ecological Genetics, Institute of Integrative Biology, ETH Zurich, 8092, Zurich, Switzerland.
J Chem Ecol. 2006 Aug;32(8):1855-60. doi: 10.1007/s10886-006-9113-0. Epub 2006 Jun 29.
Floral odor is a key trait for pollinator attraction in many plants, but may also direct antagonists like herbivores to flowers. In this study, we examined how floral scent changes after pollination in Silene latifolia, which has a specialized relationship with the seed predator Hadena bicruris. We found an overall decrease in total scent emission and considerable changes in relative amounts of scent compounds after pollination. Lilac aldehydes A and B as well as veratrole contributed most to the decrease in scent emission. These three compounds are known to be key signals for the attraction of H. bicruris to the flowers. A specific downregulation of these compounds may increase the reproductive success of the plant by reducing seed predation after pollination.
花香是许多植物吸引传粉者的关键特性，但也可能将食草动物等天敌引向花朵。在本研究中，我们研究了与种子捕食者双斑歧夜蛾有特殊关系的宽叶蝇子草授粉后花香如何变化。我们发现授粉后总香气释放量总体下降，且香气化合物的相对含量发生了显著变化。丁香醛A和B以及藜芦醚对香气释放量的下降贡献最大。已知这三种化合物是双斑歧夜蛾被花朵吸引的关键信号。这些化合物的特异性下调可能通过减少授粉后的种子捕食来提高植物的繁殖成功率。
