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2015 ; 169
(1
): 13-22
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Bacterial Modulation of Plant Ethylene Levels
#MMPMID25897004
Gamalero E
; Glick BR
Plant Physiol
2015[Sep]; 169
(1
): 13-22
PMID25897004
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A focus on the mechanisms by which ACC deaminase-containing bacteria facilitate
plant growth.Bacteria that produce the enzyme 1-aminocyclopropane-1-carboxylate
(ACC) deaminase, when present either on the surface of plant roots (rhizospheric)
or within plant tissues (endophytic), play an active role in modulating ethylene
levels in plants. This enzyme activity facilitates plant growth especially in the
presence of various environmental stresses. Thus, plant growth-promoting bacteria
that express ACC deaminase activity protect plants from growth inhibition by
flooding and anoxia, drought, high salt, the presence of fungal and bacterial
pathogens, nematodes, and the presence of metals and organic contaminants.
Bacteria that express ACC deaminase activity also decrease the rate of flower
wilting, promote the rooting of cuttings, and facilitate the nodulation of
legumes. Here, the mechanisms behind bacterial ACC deaminase facilitation of
plant growth and development are discussed, and numerous examples of the use of
bacteria with this activity are summarized.
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