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EFFECTS OF ETHYLENE BIOSYNTHESIS INHIBITORS …

Inhibitors of ethylene action and biosynthesis on cut carnation [Dianthus caryophyllus L.; cut flowers; vase life]

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Inhibition of Ethylene Biosynthesis by Salicylic Acid …

Find answers, biosynthesis cite inhibitors this page ethylene The Question and inhibitors Answer section inhibitors for Devil ethylene in inhibitors a Blue biosynthesis Dress is a great resource to ask questions, 3940">
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Inhibition of Ethylene Biosynthesis by Salicylic Acid

the fact that AOA also strongly inhibits the conversion ofSAM to ACC (Yu et al., 1979), which serves as the donor of both ethylene andHCN. In contrast, when exogenous ACC was administered along with AOA, highethylene production was maintained and the tissue became cyanogenic asindicated by the recovery of HCN from the gas phase. In the presence ofexogenous ACC, ethylene production was enhanced, but the apple tissue remainednon-cyanogenic (Table 1), presumably because the tissue had ample capabilityto detoxify the HCN produced during ethylene production.

USE OF ETHYLENE BIOSYNTHESIS INHIBITORS IN …

Aminoethoxyvinylglycine (AVG) and aminooxyacetic acid (AOA) are compounds that inhibit the synthesis of ethylene within the fruit. Pre-harvest applications of these chemicals enable fruit to reach greater maturity and colour development on the tree prior to harvest. They do this by inhibiting the 1-aminocyclopropane-1-carboxylic acid (ACC) synthase enzyme. ACC synthase is thought to be the rate-limiting step in fruit for the production of internal ethylene - ACC being the precursor molecule to ethylene in the ethylene biosynthesis pathway.

On the contrary, ethrel, an ethylene-releasing reagent, and acetylsalicylic acid (ASA), an inhibitor of both jasmonic acid (JA) and ethylene biosynthesis, depressed the elicitor-induced paclitaxel production.

Inhibitors of Ethylene Biosynthesis and Signaling

Inhibition of Ethylene Biosynthesis by Salicylic ..

To know how root growth is affected by low ethylene concentrations, a suitable approach is to test the effect of ethylene biosynthesis inhibitors such as 2-aminoethoxyvinyl glycine (AVG). At the first and second day of our study, AVG diminished the root elongation rate () and the endogenous ethylene levels comparatively to the corresponding control (). Another ethylene biosynthesis inhibitor is the cobalt ion. A concentration of cobalt 10 µM strongly inhibited root growth and ethylene production after 4, 24 and 48 h ( and ), thus confirming the results obtained with AVG treatment. Therefore, an adequate production of ethylene seems to be necessary to sustain a rapid root growth.

The precursor of ethylene ACC and two inhibitors of ethylene biosynthesis tested in our study reduced maize root elongation. Hence, when the endogenous ethylene level is experimentally raised or lowered, the result is the same: an inhibition of root growth. This implies that an adequate endogenous concentration of ethylene is necessary for root growth.

Inhibitors of Ethylene Biosynthesis and Signaling.
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  • and inhibitors of ethylene biosynthesis on ..

    is alleviated by inhibitors of ethylene biosynthesis and by the ..

  • N-acetyl AVG and its use as an ethylene biosynthesis inhibitor

    inhibitors* Ethylenes/biosynthesis;

  • Specific ethylene biosynthesis inhibitors would help to ..

    F1000Prime Recommended Article: Inhibitors of ethylene biosynthesis and signaling.

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Chemical inhibitors of ethylene biosynthesis

During the first days of development, maize roots showed considerable variation in the production of ethylene and the rate of elongation. As endogenous ethylene increases, root elongation decreases. When these roots are treated with the precursor of ethylene aminocyclopropane- 1-carboxylic acid (ACC), or inhibitors of ethylene biosynthesis 2-aminoethoxyvinyl glycine (AVG) or cobalt ions, the root elongation is also inhibited. Because of root growth diminishes at high or reduced endogenous ethylene concentrations, it appears that this phytohormone must be maintained in a range of concentrations to support normal root growth. In spite of its known role as inhibitor of ethylene action, silver thiosulphate (STS) does not change significantly the root elongation rate. This suggests that the action of ethylene on root elongation should occur, at least partially, by interaction with other growth regulators.

Acetaldehyde inhibition of ethylene biosynthesis in …

1-Methylcyclopropene (1-MCP) is a gaseous molecule that blocks the sites of ethylene binding and action in fruit. Marketed under the commercial name ‘SmartFresh’, it is increasingly used across a wide variety of stored products where the inhibition of ethylene effects is desired. Although results show a significant extension of storage life, display life and delay in softening, there are also reports of poor aroma and flavour development in some fruits as a consequence of 1-MCP’s inhibition of the respiratory climacteric. There are no known toxicological or environmental impacts from its use.

When compared to known inhibitors of the ethylene forming enzyme, ..

In the ripening fruits such as apple, avocado, and tomato,the rise in ethylene biosynthesis is accompanied by an increase in respirationin the tissue. This climacteric rise can be hastened in the preclimactericstage by ethylene and HCN. Because of this coincidence, many researchers(Muzutani et al., 1987; Pirrung and Brauman, 1987) have alluded to thepossibility that the increase in respiration may be due to the coproductcyanide that resulted from the increased ethylene biosynthesis and that theincrease in respiration is probably due to the operation of thecyanide-resistant electron transport. However, neither of these speculationsare supported by experimental results. Yip and Yang (1988) reported thatduring the ripening process of apple and avocado, the steady concentration ofcyanide in tissues could never exceed 1 µM, an amount unlikely to trigger anyphysiological changes of the tissues. Theologis and Laties have examined theengagement of the alternative respiration in intact fruit, such as avocado andbanana, reaching the conclusion that the alternate path is not required tosustain the elevated respiration rates which characterize the climactericstage in these fruits. Laties and his associates (Theologis and Laties, 1978;Tucker and Laties, 1985) have also revealed that the respiration in eitherpreclimacteric or climacteric avocado fruit is mediated by the cytochromerespiratory path and that there is no engagement of the cyanide- resistantpath in either tissue.

When compared to known inhibitors of the ethylene forming ..

Wounded, mature‐green tomato tissue treated with specific inhibitors of MTA nucleosidase and MTR kinase showed a significant reduction in the activities of these enzymes, which was concomitant with a decline in stress ethylene biosynthesis.

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