Fig 7 - uploaded by Jasarat Ali
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Schematic representation of ethylene biosynthesis pathway in plant as following: a) Biosynthesis of ethylene from substrate SAM in the presence of ACC synthase and ACC oxidase enzymes. b) Inhibition of biosynthesis of ethylene due to interaction of most potent competitive inhibitor 7-dz-SIBA with enzyme ACC synthase.
Source publication
Introduction: The increased level of ethylene inhibits root elongation and causes physiological damage, thereby reduces ethylene level imparts a positive support against various biotic and abiotic stresses viz. phytopathogens, extreme temperatures, hyper salinity, flooding, drought, metal/organic contaminants and insect predation. The metabolic pat...
Contexts in source publication
Context 1
... the presence of ACC synthase enzyme, an intermediate product ACC is formed by SAM (substrate) [38]. Moreover, ACC was oxidized by ACC oxidase enzyme, and converted into ethylene, thereby; ACC acts as main precursor for ethylene production in ethylene biosynthesis pathway (see Fig.7a). On the other hand, if an inhibitor binds with ACC synthase enzyme at the place of substrate SAM and it competitively inhibits the activity of ACC synthase that is why ACC intermediate product could not be formed. ...
Context 2
... ethylene biosynthesis pathway could be stopped. On the basis of the present study, it can be suggested that a potential inhibitor 7-dz-SIBA has a capacity to inhibit the ACC synthase activity hence intermediate ACC is not formed and ethylene concentration decreases in plants (see Fig.7b), how- Table 3. Interaction of substrate SAM and most potent inhibitor (7-dz-SIBA) with ACC synthase enzyme of Pisum sativam. ...
Citations
Sclerotinia sclerotiorum (Lib) de Bary, a destructive fungal pathogen with an extensive host range, causes major economic losses to crop production activities globally. Streptomyces spp. produce secondary metabolites with diverse structures and biological activities, with potential applications in the control of crop disease. This study explored the potential application of wuyiencin, a secondary metabolite of Streptomyces albulus CK-15, to induce defense responses in soybean against S. sclerotiorum. Lesion size was reduced by nearly 60%, in wuyiencin-treated soybean plants compared to plants infected with S. sclerotiorum only, in greenhouse experiments. Wuyiencin induced callose deposition at six hours postinoculation, and increase Reactive-Oxygen-Scavenging enzymes activities, including superoxide dismutase, catalase, and peroxidase activity. Moreover, wuyiencin inoculated before S. sclerotiorum infection significantly increased polyphenol oxidase, phenylalanine ammonia lyase, chitinase, and β-1,3-glucanase activity, suggesting their involvement in soybean defense responses to S. sclerotiorum. Further, qRT-PCR results showed expression levels of the hormone signaling markers CO11, MYC2, PR4, PR1, NPR1, and ERF1, were upregulated in infected leaves treated with wuyiencin.
