Floral herbivory at different stages of flower development changes reproduction in Iris gracilipes (Iridaceae)
Floral herbivory at different stages of flower development changes reproduction in Iris gracilipes (Iridaceae)
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DOI：
10.1007/s11258-008-9461-7
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发表时间：
2009-06-01
期刊：
影响因子：
1.7
通讯作者：
Sakai, Satoki
中科院分区：
文献类型：
--
作者：
Oguro, Michio;Sakai, Satoki
食花动物和传粉者是植物繁殖的主要决定因素。由于花的食草动物和传粉者的相互作用发生时，食草动物攻击的花在芽和花的阶段，因为植物的补偿能力是已知的不同，根据时间的食草动物，食草动物的影响可能会有所不同，根据其时间。在这项研究中，我们调查了在不同阶段的花草食动物对果实产量和种子/胚珠比在两个网站的大人口的多年生草本植物，鸢尾gracilipes 2年。蕾期和果期的取食对果实产量都有负面影响，但蕾期的取食危害更大。另一方面，在开花期的草食动物往往不会有负面影响，果实生产，因为花损失的程度较小，在开花期。虽然草食动物降低了果实产量，但花并没有通过增加种子/胚珠比来补偿损害，因为I. gracilipes是有限的花粉可用性，而不是资源。这些结果表明，不同时期的食花动物对植物繁殖的影响是不同的。
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.