Impact of floral herbivory by Coleotechnites eryngiella Bottimer (Lepidoptera: Gelechiidae) on the reproductive output of Eryngium yuccifolium Michaux (Apiaceae): a test of the reserve ovary model

摘要

The reserve ovary model is a key hypothesis proposed to explain why plants produce surplus flowers and posits that plants may utilize surplus flowers to compensate for losses from floral herbivory. We tested this hypothesis in the prairie plant Eryngium yuccifolium and its floral herbivore Coleotechnites eryngiella. At five Illinois tallgrass prairie sites, we collected central, primary lateral, and secondary lateral inflorescences from E. yuccifolium to determine whether damage by the larvae of C. eryngiella to the flowers in earlier developing inflorescences would be compensated for in later developing inflorescences. Coleotechnites eryngiella does extensive damage to the central and primary inflorescences and little damage to the secondary inflorescences. Later maturing inflorescences did not compensate for early damage by increasing seed production in later inflorescences. The secondary inflorescences of E. yuccifolium may only compensate for catastrophic damage done to the central and primary inflorescences early on in development, serve as additional advertisements for pollinators, act as pollen donors, or allow the plant to take advantage of ecological windows of high pollinator and low herbivore abundance. Our findings were spatially and temporally consistent and did not support the predictions of the reserve ovary model in the E. yuccifolium-C. eryngiella system suggesting that in this system, alternate, proximate, and ultimate causes need to be explored for the production of surplus flowers.展开▼

机译：备用卵巢模型是提出的一个关键假设，用以解释植物为什么会产生多余的花朵，并假定植物可能会利用多余的花朵来补偿食草动物的损失。我们在草原植物刺桐（Eryngium yuccifolium）及其花卉食草动物Coleotechnites eryngiella中测试了该假设。在五个伊利诺伊州的高草草原站点，我们收集了紫茎泽兰的中央，初级侧生和次级侧生花序，以确定在早期发育中的花序中，虫尾藻的幼虫对花的损害是否可以得到补偿。沙雷氏菌对中央和初级花序造成广泛的损害，而对次级花序的损害很小。后期成熟的花序不能通过增加后期花序中的种子产量来补偿早期损害。金银花的次生花序只能补偿发育初期对中央和初级花序造成的灾难性损害，为传粉媒介提供额外广告，充当花粉供体，或允许植物利用高传粉媒介的生态窗口和低草食动物的丰度。我们的发现在空间和时间上是一致的，并不支持大叶黄杨-C中卵巢储备模型的预测。 eryngiella系统建议在该系统中，需要探究产生多余花的交替，邻近和最终原因。展开▼

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网址: Impact of floral herbivory by Coleotechnites eryngiella Bottimer (Lepidoptera: Gelechiidae) on the reproductive output of Eryngium yuccifolium Michaux (Apiaceae): a test of the reserve ovary model https://www.huajiangbk.com/newsview1636115.html