Ethylene influences many aspects of plant growth and development including germination, leaf and floral senescence and abscission, fruit ripening, and the response to abiotic and biotic stress. The pathways involved in the biosynthesis of and response to ethylene have been elucidated. The first committed and generally rate-limiting step in ethylene biosynthesis is the conversion of S-adenosyl-m...

It has been reported that the C0-C4 carbons of methionine are converted to ethylene in FMN-light (23) and Cu"!-ascorbate (10) model systems. Yang (22) has shown that C-C, carbons of 2-keto-4-methylthiobutyrate and the Cr, carbons of 3-methylthiopropionaldehyde (i.e., methional) are converted to ethylene in a model peroxidase system. When methionine was fed to apple tissue, the C-C4 carbons were...

To investigate the role of ethylene in peach fruit softening during ripening, stony hard peach fruit, in which ethylene production is suppressed during ripening, were treated with various concentrations of ethylene. There was no noticeable decrease in flesh firmness without ethylene treatment, while applied ethylene, in the range 0.1-100 microl l(-1), resulted in fruit softening. Furthermore, t...

OBJECTIVE This study was designed to investigate the survival rate of vitrified mouse blastocysts depending on the presence or absence of sucrose in vitrification solution. METHODS Mouse two-cell embryos were collected and cultured to blastocysts. Two vitrification solutions were prepared. The control solution was composed of 25% glycerol, 25% ethylene glycol, and 0.5 M sucrose (G25E250.5S) c...

The thermal decomposition of trans-chloroethylbis(triethylphosphine)platinum(II) (L2PtEtCl, 1) in cyclohexane solution at 158 oC yields trons-chlorohydridobis(triethylphosphine)platinum(II) (3) and ethylene. The most probable rate-limiting step for this reaction is dissociation of ethylene from a five-coordinate l8-electron plat inum(Il) intermediate, L2PtHCl(CzH) Q). Three pathways might be in...