Gamalero Elisa, Glick Bernard R
Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, 15121 Alessandria, Italy (E.G.); andDepartment of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 (B.R.G.)
Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, 15121 Alessandria, Italy (E.G.); andDepartment of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 (B.R.G.).
Plant Physiol. 2015 Sep;169(1):13-22. doi: 10.1104/pp.15.00284. Epub 2015 Apr 20.
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.
关注含ACC脱氨酶的细菌促进植物生长的机制。产生1-氨基环丙烷-1-羧酸（ACC）脱氨酶的细菌，无论存在于植物根表面（根际）还是植物组织内（内生），在调节植物体内乙烯水平方面都发挥着积极作用。这种酶活性尤其在各种环境胁迫下促进植物生长。因此，具有ACC脱氨酶活性的植物促生细菌可保护植物免受水淹和缺氧、干旱、高盐、真菌和细菌病原体、线虫以及金属和有机污染物存在所导致的生长抑制。具有ACC脱氨酶活性的细菌还可降低花朵枯萎率，促进插条生根，并有助于豆科植物结瘤。在此，讨论了细菌ACC脱氨酶促进植物生长发育背后的机制，并总结了使用具有这种活性的细菌的众多实例。
