I suspect that under phosphorus deficiency the electron transport chain in the plasmamembrane and mitochondria of soil bacteria and AM fungi, respectively, is disrupted as a result of lower ATP production. This causes an increase in reactive oxygen species, which in turn destroys their membranes. Unable to maintain structural integrity dehydrogenase activity decreases.
However, I am unable to find any information regarding the effect of phosphorus deficiency on dehydrogenase activity in soil microorganisms, other than it increased or decreased. However, I want to understand why does it increase or decrease. I would like a detailed explanation of the mechanism. If you would be so kind, and if available, to provide any type of literature or a description of what is occurring in terms of dehydrogenase activity when these microorganisms are in low-phosphorus environments, I would really appreciate it.
@ Pamela, under deficient P condition in the soil the dehydrogenase activity is decreases. Microbial metabolic activity (dehydrogenase activity per microbial biomass C) was significantly higher (P
J. C. Tarafdar Thank you for your reply and for providing the article by Agnieszka Wolińska and Zofia Stepniewska. I have read this article before, and while it is informative it does not provide any mechanisms for why phosphorus deficiency specifically decreases dehydrogenase activity in the cells of these microorganisms. Could you elaborate as to why dehydrogenase activity decreases under phosphorus deficiency?
@ Pamela, I think the attached file may provide you some understanding.
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