Rapid flower closure of <i>Drosera tokaiensis</i> deters caterpillar herbivory
Rapid flower closure of <i>Drosera tokaiensis</i> deters caterpillar herbivory
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<i>Drosera tokaiensis</i> 的快速开花阻止毛毛虫食草
DOI：
10.1098/rsbl.2022.0373
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发表时间：
2022
期刊：
影响因子：
3.3
通讯作者：
Watanabe Mikio
中科院分区：
文献类型：
--
作者：
Tagawa Kazuki;Osaki Haruka;Watanabe Mikio
某些植物表现出快速运动，以响应机械刺激;然而，这种行为的生态功能在很大程度上是未知的。在这里，我们表明，快速的花关闭ofDrosera tokaiensis（Droseraceae）在响应机械刺激功能作为一个物理防御专业草食动物Buckleria paludum（Pterophoridae）毛虫。结果表明，该菌对果实、花、花梗和花蕾均有取食危害。paludum、黄毛藓D. tokaiensi的花朵关闭速度比自然昼夜节律关闭时快9倍。损坏胚珠的程度显着降低时，花能够关闭的条件相比，其中关闭物理抑制的应用程序的树脂。然而，花关闭没有影响的取食损害雄蕊和花柱，并促进进一步损害花瓣。考虑到以花瓣、雄蕊和花柱为食对成熟种子的数量没有显著影响，导致胚珠保护的快速花关闭对D的繁殖成功有总体积极的影响。东海藻我们的研究表明，快速植物运动作为一种新的情况下，诱导物理防御草食动物。
Certain plants exhibit rapid movement in response to mechanical stimulation; however, the ecological functions of this behaviour are largely unknown. Here, we show that the rapid flower closure ofDrosera tokaiensis(Droseraceae) in response to mechanical stimulation functions as a physical defence against a specialist herbivoreBuckleria paludum(Pterophoridae) caterpillar. Following feeding damage on fruits, flowers, flower stalks and buds byB. paludum,D. tokaiensisclosed its flowers nine times faster than during natural circadian closure. The extent of damage to ovules was significantly reduced when the flowers were able to close compared with the condition in which closure was physically inhibited by the application of a resin. Nonetheless, flower closure had no effect on the feeding damage to stamens and styles and promoted further damage to petals. Given that feeding on petals, stamens and styles had no significant effect on the number of mature seeds, rapid flower closure leading to the protection of ovules had an overall positive effect on the reproductive success ofD. tokaiensis. Our study showed rapid plant movement as a novel case of induced physical defence against herbivory.