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Floral herbivory at different stages of flower development changes reproduction in Iris gracilipes (Iridaceae).

花匠小妙招
2025-01-27 05:01

摘要

Floral herbivores and pollinators are major determinants of plant reproduction. Because interaction of floral herbivores and pollinators occurs when herbivores attack the flowers in the bud and flower stages and because the compensatory ability of plants is known to differ according to the timing of herbivory, the effects of herbivory may differ according to its timing. In this study, we investigated the effects of floral herbivory at different stages on fruit production and seed/ovule ratio at two sites of large populations of the perennial herb, Iris gracilipes for 2 years. Herbivory at the bud and fruit stages both tended to have negative effects on fruit production, but the former caused more severe damage. On the other hand, herbivory at the flower stage tended not to have negative effects on fruit production because the degree of flower loss was smaller in the flower stage. Although herbivory decreased fruit production, flowers did not compensate for the damage by increasing the seed/ovule ratio because reproduction of I. gracilipes was limited by pollen availability rather than resources. These results indicate that floral herbivory at different stages has different effects on plant reproduction.展开▼

机译：花草食动物和传粉媒介是植物繁殖的主要决定因素。由于草食动物在芽和花期侵害花朵时会发生花草食动物与传粉媒介的相互作用，并且由于已知植物的补偿能力会根据草食动物的时机而不同，因此草食动物的效果可能会因其时机而异。在这项研究中，我们调查了多年生多年生草本植物鸢尾鸢尾两个种群的两个站点上不同阶段的花卉食草对果实产量和种子/胚珠比的影响，为期两年。芽期和果实期的食草均对果实的产量产生不利影响，但前者造成的危害更严重。另一方面，在花期的食草趋向于对水果生产没有负面影响，因为在花期的花失落程度较小。尽管食草减少了水果的产量，但花朵并未通过增加种子/胚珠的比例来弥补损害，因为I的繁殖。 gracilipes 受花粉可用性而非资源的限制。这些结果表明，不同阶段的花卉食草对植物繁殖的影响不同。展开▼

网址: Floral herbivory at different stages of flower development changes reproduction in Iris gracilipes (Iridaceae). https://m.huajiangbk.com/newsview1636111.html

所属分类：花卉