MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824.
Plant Physiol. 1981 Aug;68(2):460-3. doi: 10.1104/pp.68.2.460.
Depletion of glucose from the culture medium by Poterioochromonas malhamensis results in cessation of growth and accumulation of cyclic adenosine 3':5'-monophosphate (cAMP), followed by formation of chlorophyll and an increase in extracellular cAMP. Readdition of glucose to the culture medium causes P. malhamensis to release its intracellular cAMP into the medium. These results suggest that formation of the photosynthetic apparatus in P. malhamensis may be repressed by glucose, and that high cAMP conveys the regulatory information that the glucose supply is inadequate. This pattern is reminiscent of cAMP-mediated escape from catabolite repression in bacteria.
柄海鞘因耗尽培养基中的葡萄糖而停止生长,并积累环腺苷酸(cAMP),随后形成叶绿素并使细胞外 cAMP 增加。将葡萄糖重新添加到培养基中会导致柄海鞘将其细胞内的 cAMP 释放到培养基中。这些结果表明,柄海鞘中光合器官的形成可能受到葡萄糖的抑制,而高浓度的 cAMP 传递出葡萄糖供应不足的调节信息。这种模式让人联想到细菌中 cAMP 介导的逃离分解代谢物阻遏的现象。