由寄主植物水分关系介导的昆虫物候学

INSECT PHENOLOGY MEDIATED BY HOST-PLANT WATER RELATIONS.

作者信息

Wood T K, Olmstead K L, Guttman S I

机构信息

Department of Entomology and Applied Ecology, University of Delaware, Newark, DE, 19717-1303.

Department of Entomology, University of Maryland, College Park, MD, 20742.

出版信息

Evolution. 1990 May;44(3):629-636. doi: 10.1111/j.1558-5646.1990.tb05943.x.

DOI:10.1111/j.1558-5646.1990.tb05943.x

PMID:28567982

Abstract

Water relations of host plants modify Enchenopa binotata life histories by mediating the termination of egg dormancy, thereby promoting synchronization of egg hatch. Dormant eggs must undergo dehydration and subsequent hydration to begin development. Dehydration of eggs is brought about in the field by declining water levels in branches during the fall and by prolonged cold. Hydration of eggs occurs when sap begins to rise in early spring. Since the ascent of sap occurs at different times in the six species of Enchenopa host plants, the phenology of egg hatch and adult maturation are allochronic. Shifts to novel host plants differing in phenology promote asynchrony of Enchenopa life histories among host-plant species. Thus, the host plant acts as an extrinsic disruptive factor that may promote genetic divergence and temporal reproductive isolation in Enchenopa.

摘要

寄主植物的水分关系通过介导卵休眠的终止来改变双线叶蝉的生活史，从而促进卵孵化的同步性。休眠卵必须经历脱水和随后的水合作用才能开始发育。秋季树枝中水位下降以及长时间的寒冷会导致卵在野外脱水。早春树液开始上升时，卵会发生水合作用。由于六种双线叶蝉寄主植物的树液上升时间不同，卵孵化和成虫成熟的物候是异时的。转向物候不同的新寄主植物会促进寄主植物物种间双线叶蝉生活史的异步性。因此，寄主植物作为一种外在的干扰因素，可能会促进双线叶蝉的遗传分化和时间生殖隔离。