Whang K, Hattori T
Institute for Agricultural Research, Tohoku University, Sendai, Japan.
Antonie Van Leeuwenhoek. 1988;54(1):19-36. doi: 10.1007/BF00393955.
Oligotrophic bacteria were shown to exist abundantly in all layers of a rendzina forest soil throughout the year. Two-hundred-three oligotrophic bacteria were isolated from forest soil (Aoba, Sendai) at different layers (L, F, H and A layers) throughout the year, and their morphological and physiological characteristics were examined. A high proportion (95%) of the isolated oligotrophs were Gram-negative, non-spore forming bacteria. Based on the cell shape, the isolates were divided into four groups: regular rods, curved/spiral bacteria, irregular rods, and buddin and/or prosthecate bacteria. Each group of bacteria is discussed in relation to the physiological characteristics. Notably oligotrophic bacteria of different cell types showed a marked zonal distribution in respect to profile depth.
研究表明，在淋溶土森林土壤的所有层次中，贫营养细菌全年都大量存在。全年从不同层次（L层、F层、H层和A层）的森林土壤（仙台青叶）中分离出203株贫营养细菌，并对其形态和生理特征进行了研究。分离出的贫营养菌中，很大比例（95%）是革兰氏阴性、不产芽孢的细菌。根据细胞形态，分离菌被分为四组：规则杆菌、弯曲/螺旋菌、不规则杆菌以及芽生和/或有菌柄细菌。针对每组细菌，结合其生理特征进行了讨论。值得注意的是，不同细胞类型的贫营养细菌在剖面深度方面呈现出明显的带状分布。
