红螺菌(Rhodospirillum sp.)的生长及其饥饿存活的研究

红螺菌（Ｒｈｏｄｏｐｉｒｉｌｌｕｍ ｓｐ．）是在多种不同生境中广泛存在的光合细菌中的一类，它在水产养殖上也得到了广泛应用。报道了不同生长阶段红螺菌在饥饿环境中的存添能力。红螺菌在饥饿环境中的存活能力提高。分批培养过程中，同时测定红螺菌数和可培养活菌数的变化表明，静止期生长期后的红螺菌难以在固体培养基上形成菌落，进入非可培养状态，进入非可培养状态的红螺菌经复苏培养后仍可恢复在固体培养基上形成菌落的能

Studies on the growth and starvation survival of Rhodospirillum sp.

Rhodospirillum sp.is one of the most important member of photosynthetic bacteria,and can be found in a variety of natural habitats.Studies on the growth and starvation survival of Rhodospirillum sp.are essential for the understanding of the adaptation of bacteria to their natural environments and for the understanding of their contribution to the energy transfer and nutrients recycling in ecosystems. Rhodospirillum sp.can normally survive in one month period of starvation.The resistance to starvation was enhanced as the bacteria experienced an extented period of stationary phase.The variations of the total bacterial counts and CFU in its growth process in the batch culture were monitored.As it grows to stationary phase, Rhodospirillum sp. enters into nonculturable state that connot form a colony on solid media.These nonculturable bacteria can recover the ability to form a colony on solid media after resuscitation.This reflects the fact that Rhodospirillum sp. turns into dormant in the extended stationary phase.It was experimentally demonstrated that the dormancy of Rhodospirillum sp. was induced by both the depletion of nutrients and some biochemical components accumulated in media during its growth process.