Recent developments in use of 1-aminocyclopropane-1-carboxylate (ACC) deaminase for conferring tolerance to biotic and abiotic stress

Abstract

Ethylene is an essential plant hormone also known as a stress hormone because its synthesis is accelerated by induction of a variety of biotic and abiotic stress. The plant growth promoting bacteria containing the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase enhances plant growth by decreasing plant ethylene levels under stress conditions. The expression of ACC deaminase (acdS) gene in transgenic plants is an alternative approach to overcome the ethylene-induced stress. Several transgenic plants have been engineered to express both bacterial/plant acdS genes which then lowers the stress-induced ethylene levels, thus efficiently combating the deleterious effects of environmental stresses. This review summarizes the current knowledge of various transgenic plants overexpressing microbial and plant acdS genes and their potential under diverse biotic and abiotic stresses. Transcription regulation mechanism of acdS gene from different bacteria, with special emphasis to nitrogen fixing bacteria is also discussed in this review.

The role of Cryptococcus laurentii and mycorrhizal fungi in the nutritional physiology of Lupinus angustifolius L. hosting N2-fixing nodules

“…This phenomenon was, however, demonstrated for PGPR (Dashti et al 1998;Chebotar et al 2001;Valverde et al 2006;Figueiredo et al 2008;Yadegari et al 2010) and some mechanisms whereby these bacteria affect BNF were described previously. For instance, the production of IAA and ACC deaminase by PGPR is known to increase nodule ATP and longevity respectively (Takahashi et al 2012;Gontia-Mishra et al 2014). Considering that during the present study we found that C. laurentii CAB 91 was able to produce IAA and ACC deaminase in vitro, it seems possible that this yeast influenced the BNF of CL treated plants in a similar manner than PGPR.…”

Root-associated bacteria promote grapevine growth: from the laboratory to the field

“…Several studies have demonstrated the beneficial effects exerted by PGP bacteria on the laboratory scale (Bhardwaj et al 2014;Gontia-Mishra et al 2014;Daffonchio et al 2015;Haney et al 2015), but relatively less data are available under on the field scale (Bashan et al 2014 and references therein;Nelissen et al 2014). Translating laboratory results to field trials is important for the future development of crop productivity (Tuberosa 2012;Bashan et al 2014).…”

Physiological and Molecular Alterations Promoted by Schizotetranychus oryzae Mite Infestation in Rice Leaves

“…The higher expression of 1-aminocyclopropane-1-carboxylate (ACC) deaminase (which catalyzes the hydrolytic cleavage of ACC, the immediate precursor of ethylene, and is therefore an inhibitor of ethylene biosynthesis) in EI than in control leaves (Table S-2) is another indication that S. oryzae infestation interfere with ethylene biosynthesis. Several transgenic plants have been engineered to express the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase in order to decrease plant ethylene levels and enhance tolerance to biotic and abiotic stresses 104 . Probably as a consequence of ACC deaminase activity (which results in low ACC levels for ethylene biosynthesis), we detected higher expression of three ACC oxidase genes ( OsACO3 , 5 and 7 ) in rice leaves infested with S. oryzae , when compared to control leaves (Figure 6e–g).…”