Aspects of pitcher morphology and spectral characteristics of six bornean Nepenthes pitcher plant species:: Implications for prey capture
Aspects of pitcher morphology and spectral characteristics of six bornean Nepenthes pitcher plant species:: Implications for prey capture
复制标题
DOI：
10.1006/anbo.1999.0857
复制
发表时间：
1999-05-01
期刊：
影响因子：
4.2
通讯作者：
Charles, JK
中科院分区：
文献类型：
--
作者：
Moran, JA;Booth, WE;Charles, JK
猪笼草属的猪笼草用分泌花蜜的猪笼草吸引和诱捕无脊椎动物的猎物。本文研究了婆罗洲西北部六种猪笼草（N，albomanata，N。ampullaria，N. bicalcarata、二爪野螟N. gracilis、细叶拟步行虫N.紫茉莉变种echinostoma和N.rafflesiana）。形态学测量集中在投手边缘（或口，网站的主要蜜腺）的大小与投手长度。结果表明，相当大的种间变异形态。光谱反射率测量量化的程度，从紫外线（UV）到红色波长的口唇和投手身体之间的颜色对比。将每个物种的对比度最大值与昆虫视觉灵敏度最大值进行比较。这六个物种表现出广泛的反射模式，具有猪笼草，rafflesiana的猪笼草具有最大程度的"适合"之间的对比度最大值和昆虫的敏感性最大值，在紫外线，蓝色和绿色区域的光谱。根据形态学和反射率分析，我们推测，N。rafflesiana比同域分布的N.股薄肌猎物内容的分析一般支持这一假设，这表明可能的种间资源分配。其他物种的形态和光谱特征进行了讨论，有关这些物种的猎物捕获发表的研究。(C)1999年《植物学年鉴》（Annals of Botany Company）
Pitcher plants of the genus Nepenthes attract and trap invertebrate prey using nectar-secreting pitchers. Pitcher morphology and spectral reflectance characteristics were investigated for six Nepenthes species from northwest Borneo (N, albomarginata, N. ampullaria, N. bicalcarata, N. gracilis, N. mirabilis var. echinostoma and N, rafflesiana). Morphological measurements focused on the size of the pitcher rim (or peristome, the site of the major nectaries) in relation to pitcher length. The results show considerable interspecific variation in morphology. Spectral reflectance measurements quantified the degree of colour contrast between the peristome and pitcher body, from ultraviolet (UV) to red wavelengths. The contrast maxima for each species were compared with insect visual sensitivity maxima. The six species showed a wide range of reflectance patterns, with pitchers of N, rafflesiana possessing the greatest degree of 'fit' between contrast maxima and insect sensitivity maxima, in the UV, blue and green regions of the spectrum. Based on the morphological and reflectance analyses, we hypothesized that pitchers of N. rafflesiana would be more attractive to anthophilous (flower-visiting) invertebrates than the sympatric N. gracilis. Analysis of prey contents generally supported the hypothesis, suggesting possible interspecific resource partitioning. Morphological and spectral characteristics of the other species are discussed in relation to published studies on prey capture by those species. (C) 1999 Annals of Botany Company.