Evidence for alternative trapping strategies in two forms of the pitcher plant, Nepenthes rafflesiana.
Evidence for alternative trapping strategies in two forms of the pitcher plant, Nepenthes rafflesiana.
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DOI：
10.1093/jxb/err082
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发表时间：
2011-06
影响因子：
6.9
通讯作者：
Federle W
中科院分区：
文献类型：
--
作者：
Bauer U;Grafe TU;Federle W
猪笼草的猪笼草是一种特殊的叶子，具有捕虫器的功能。几个投手组件可能有助于诱捕，包括投手液，光滑的蜡晶和向下指向的表皮细胞的内部投手壁，和湿度依赖的投手边缘（peristome），但这些特征的相对重要性尚不清楚。猎物捕获和保留在该领域的机制进行了研究，通过量化的影响，“敲除”操作的个人投手结构，并通过测试的能力，投手液和水保留昆虫。两种形式的猪笼草rafflesiana杰克（“细长”和“典型”）与对比组合的投手性状进行了比较。蜡晶的内部投手壁被认为是最重要的诱捕结构在细长的形式，而典型的形式主要依赖于口。这两种形式的投手液体，在粘弹性的程度显着不同，保留显着更多的蚂蚁比水。目前的研究结果表明，猪笼草利用几种机制捕获和保留猎物，不同的形式之间的效率和相对重要性。有人建议，这些差异代表替代猎物捕获策略，可以提供一种机制，以减少竞争，促进物种共存营养有限的栖息地。
Nepenthes pitchers are specialized leaves that function as insect traps. Several pitcher components may contribute to trapping, including the pitcher fluid, slippery wax crystals and downward-pointing epidermal cells on the inner pitcher wall, and the wetness-dependent pitcher rim (peristome), but the relative importance of these traits is unclear. Mechanisms of prey capture and retention in the field were investigated by quantifying the effect of ‘knock-out’ manipulations of individual pitcher structures, and by testing the ability of pitcher fluids and water to retain insects. Two forms of Nepenthes rafflesiana Jack (‘elongate’ and ‘typical’) with contrasting combinations of pitcher traits were compared. Wax crystals on the inner pitcher wall were found to be the most important trapping structure in the elongate form, whereas the typical form relied primarily on the peristome. The pitcher fluids of both forms, differing markedly in the degree of viscoelasticity, retained significantly more ants than water. The present results show that pitcher plants utilize several mechanisms for prey capture and retention, varying in efficiency and relative importance between forms. It is proposed that these differences represent alternative prey capture strategies that may provide a mechanism to reduce competition and facilitate species co-existence in nutrient-limited habitats.
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影响因子：
9.4
作者：
Gaume, L;Gorb, S;Rowe, N
通讯作者：
Rowe, N
影响因子：
3.3
作者：
Grafe, T. Ulmar;Schoener, Caroline R.;Schoener, Michael G.
通讯作者：
Schoener, Michael G.
影响因子：
4.2
作者：
Gaume, Laurence;Di Giusto, Bruno
通讯作者：
Di Giusto, Bruno
影响因子：
9.4
作者：
JOEL, DM;JUNIPER, BE;DAFNI, A
通讯作者：
DAFNI, A
影响因子：
2.7
作者：
Cresswell, JE
通讯作者：
Cresswell, JE