Adams D, Douglas A E
Department of Biology, University of York, P.O. Box 373, York, YO1 5YW, UK fax: 01904 432860; e-mail:
Oecologia. 1997 May;110(4):528-532. doi: 10.1007/s004420050190.
To explore the effect of rearing-plant species on the contribution of the symbiotic bacterium, Buchnera, to aphid performance, larvae of Aphis fabae that contained the bacteria (symbiotic aphids) and larvae experimentally deprived of the bacteria (aposymbiotic aphids) were reared on 16 plant species. Mortality of aphids was low on most plant species. The relative growth rate (RGR) of the larvae varied with plant species, and was generally depressed by elimination of the bacteria; the mean values of RGR varied between 0 and 0.29 μg μg day for symbiotic aphids and 0 and 0.17 μg μg day for aposymbiotic aphids. The extent to which RGR was depressed by aposymbiosis varied significantly between plant species, suggesting that aphid host plant may influence the contribution of the bacteria to plant utilisation. It is proposed that the bacteria may be particularly important on plants with phloem sap of high amino acid content of low quality, i.e. low concentrations of essential amino acids.
为探究寄主植物种类对共生细菌布赫纳氏菌对蚜虫生长发育贡献的影响，将携带该细菌的豆蚜幼虫（共生蚜虫）和经实验去除该细菌的幼虫（非共生蚜虫）饲养在16种植物上。在大多数植物上，蚜虫的死亡率较低。幼虫的相对生长率（RGR）因植物种类而异，并且通常因细菌的去除而降低；共生蚜虫的RGR平均值在0至0.29μg μg/天之间，非共生蚜虫的RGR平均值在0至0.17μg μg/天之间。非共生状态对RGR的抑制程度在不同植物种类间差异显著，这表明蚜虫寄主植物可能会影响细菌对植物利用的贡献。有人提出，在韧皮部汁液中氨基酸含量高但质量低（即必需氨基酸浓度低）的植物上，该细菌可能尤为重要。
