Mechanisms of a locally adaptive shift in allocation among growth, reproduction, and herbivore resistance in Mimulus guttatus

Evolution; International Journal of Organic Evolution
David B LowryLiza M Holeski

Abstract

Environmental gradients can drive adaptive evolutionary shifts in plant resource allocation among growth, reproduction, and herbivore resistance. However, few studies have attempted to connect these adaptations to underlying physiological and genetic mechanisms. Here, we evaluate potential mechanisms responsible for a coordinated locally adaptive shift between growth, reproduction, and herbivore defense in the yellow monkeyflower, Mimulus guttatus. Through manipulative laboratory experiments, we found that gibberellin (GA) growth hormones may play a role in the developmental divergence between perennial and annual ecotypes of M. guttatus. Further, we detected an interaction between a locally adaptive chromosomal inversion, DIV1, and GA addition. This finding is consistent with the inversion contributing to the evolutionary divergence between inland annual and coastal perennial ecotypes by reducing GA biosynthesis/activity in perennials. Finally, we found evidence that the DIV1 inversion is partially responsible for a coordinated shift in the divergence of growth, reproduction, and herbivore resistance traits between coastal perennial and inland annual M. guttatus. The inversion has already been established to have a substantial...Continue Reading

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Citations

Apr 23, 2019·Evolution; International Journal of Organic Evolution·Steven Dodsworth, Oscar A Pérez-Escobar
Apr 8, 2020·Frontiers in Plant Science·Kaichi Huang, Loren H Rieseberg
Jun 2, 2020·The Journal of Heredity·Nicholas J KooyersLiza M Holeski
Jan 24, 2021·Journal of Evolutionary Biology·Liza M HoleskiNicholas J Kooyers
Apr 19, 2021·Trends in Plant Science·Xosé López-Goldar, Anurag A Agrawal
Jun 24, 2021·The Plant Journal : for Cell and Molecular Biology·Qinzheng ZhaoJinfeng Chen
Jul 29, 2021·The New Phytologist·Kenneth M OlsenLin-Feng Li

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