Impact of polyphenols on growth of the aquatic herbivore Acentria ephemerella
Impact of polyphenols on growth of the aquatic herbivore Acentria ephemerella
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DOI：
10.1023/a:1021049332410
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发表时间：
2002-11-01
影响因子：
2.3
通讯作者：
Gross, EM
中科院分区：
文献类型：
--
作者：
Choi, C;Bareiss, C;Gross, EM
短花向日葵幼虫完全生活在水下，以池草等沉水的水生被子植物为食。和桃金娘Myriophyllum spicatum。只有后者含有高浓度的可水解性单宁，已知会干扰昆虫食草动物的生长。我们测试了幼虫在贯叶锦鸡儿或狭叶锦鸡儿上的生长速度是否更快，以及这是否是由于它们食物来源中的多酚所致。来自同一卵巢的幼虫在贯叶黄粉虫上的生长速度和体积均大于在刺叶黄粉虫上的生长速度。对越冬滞育的幼虫也观察到同样的生长反应，无论是越冬滞育在Popfoliatus上还是在M.spicatum上。这些幼虫被它们的寄主植物或其他大型植物喂养。无明显的摄食效应，但在刺参上饲养的幼虫生长速度低于在贯叶松材上饲养的幼虫。从湖中或在水族箱中培育的另一只寄生在斯氏沼虾上的卵的幼虫，在湖上的植物上表现出生长减慢。贯叶黄腐鱼的酚类化合物含量不到1%，刺叶黄连藻(水族馆或田间材料)的酚类化合物含量在5%至9%之间。叶片含氮量差异不显著，但顶端茎段含氮量显著高于贯叶连翘。我们的结果表明，当饲喂细穗拟青霉时，水解性单宁是导致向日葵生长减少的原因。
Larvae of Acentria ephemerella live fully submerged, feeding on submersed aquatic angiosperms such as pondweeds (Potamogeton spp.) and Myriophyllum spicatum. Only the latter contains high concentrations of hydrolyzable tannins known to interfere with the growth of insect herbivores. We tested whether larvae grow faster on Potamogeton perfoliatus or M. spicatum and whether this is due to polyphenols in their food source. Larvae originating from the same egg clutch grew faster and larger on P perfoliatus than on M. spicatum. The same growth response was observed with larvae that spent winter diapause on either P perfoliatus or M. spicatum. These larvae were fed either with their host plant or the other macrophyte. No prior feeding effect was found, but growth of larvae reared on M. spicatum was less than when grown on P perfoliatus. Larvae from another egg-clutch reared on M. spicatum, either from lake or cultivated in aquaria, exhibited reduced growth on the lake plants. P perfoliatus contained less than 1% and M. spicatum (aquarium or field material) between 5 and 9% phenolic compounds. No differences in nitrogen content of leaves were found, but apical shoot sections of M. spicatum exhibited a significantly higher nitrogen content than P perfoliatus. Our results indicate that hydrolyzable tannins are responsible for the reduced growth of Acentria when fed with M. spicatum.