Title: Bacterial ACC Deaminase and the Alleviation of Plant Stress
Abstract: This chapter discusses one of the mechanisms that a number of plant growth-promoting bacteria use to facilitate plant growth and development is the lowering of a plant's ethylene concentration through the action of the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase. The ACC deaminase–containing plant growth-promoting bacteria bind to the surface of either the seed or root of a developing plant, and in response to tryptophan and other small molecules that are found in seed and/or root exudates, the bacteria synthesize and secrete indole acetic acid (IAA), some of which is taken up by the plant. This IAA, together with endogenous plant IAA, can stimulate plant cell proliferation or plant cell elongation and can induce the synthesis of the plant enzyme ACC synthase that converts S-adenosylmethionine to ACC. It is noted that ACC deaminase-containing plant growth-promoting bacteria can take up and cleave plant ACC and thereby lower plant ethylene levels, regardless of whether the ACC is produced as a consequence of normal development, interaction with bacteria, or some sort of environmental stress.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: review
Indexed In: ['crossref', 'pubmed']
Access and Citation
Cited By Count: 264
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