The Effect of Methyl Jasmonate on Ethylene Production and Ethylene-Forming Enzyme Activity in Tomatoes

The Jasmonate-Activated Transcription Factor MdMYC2 Regulates ETHYLENE RESPONSE FACTOR and Ethylene Biosynthetic Genes to Promote Ethylene Biosynthesis during Apple Fruit Ripening

“…JA has been implicated in promoting ethylene production in several species, including apple (Saniewski and Czapski, 1985;Saniewski et al, 1987;Fan et al, 1997;Kondo et al, 2009;Khan and Singh, 2015;Lalel et al, 2015). For example, JA treatment markedly increases the expression of MdACS1 and MdACO1, as well as ethylene production, in apple fruit during ripening (Fan et al, 1997(Fan et al, , 1998Kondo et al, 2009).…”

“…Although JA-promoted ethylene production has been reported in various fruit species (Saniewski and Czapski, 1985;Saniewski et al, 1987;Fan et al, 1997Fan et al, , 1998Kondo et al, 2009;Khan and Singh, 2015;Lalel et al, 2015), most of these studies only focused on the changes in ACS or ACO expression and ethylene production. In contrast, our work links JA and ethylene biosynthesis by shedding light on the regulation of MdERFs, MdACS1, and MdACO1 by MdMYC2.…”

“…Many studies involving various species have been performed to elucidate the role of JA in fruit ripening (Saniewski et al, 1987;Fan et al, 1997;Kondo et al, 2009;Concha et al, 2013;Khan and Singh, 2015). For example, Kondo et al (2000) reported that endogenous JA levels increase in apple fruit during maturation.…”

“…For example, Kondo et al (2000) reported that endogenous JA levels increase in apple fruit during maturation. Additionally, the application of JA to fruits results in increased ethylene production in tomato (Saniewski and Czapski, 1985;Saniewski et al, 1987), apple (Fan et al, 1997;Fan et al, 1998;Kondo et al, 2009), plum (Prunus salicina) (Khan and Singh, 2015), and mango (Mangifera indica) (Lalel et al, 2015). However, little is known about the mechanism by which JA promotes ethylene production, such as enhancing the expression of ethylene signaling genes (Saniewski et al, 1987;Fan et al, 1998;Kondo et al, 2009;Khan and Singh, 2015), thereby promoting the expression of ethylene biosynthetic genes and ethylene production during fruit ripening.…”

Plant Defense Genes Are Synergistically Induced by Ethylene and Methyl Jasmonate.

“…All data for every osmotin promder-GUS fusion construct were obtained from several hundred seedlings of three independent transformants carrying that construct. The mean GUS activities of the control (untreated) for GUSlB and constructs 5, 8, 10, 11, 13, 16, 18, 22, and 23 were 83, 83, 136, 169, 65, 77, Although both the stimulation and inhibition of ethylene biosynthesis by MeJA have been reported (Saniewski et al, 1987;Bailly et al, 1992;Chou and Kao, 1992), the ability of MeJA and ethylene to coregulate the osmotin gene is not a result of any effect of MeJA on ethylene production. As shown in Figure 1A, there is a fivefold induction of GUS activity by ethylene in GUS1B seedlings, and this induction is not increased by higher concentrations of ethylene.…”