Effect of Aminoethoxyvinylglycine (AVG) on Preharvest Drop, Fruit Quality, and Maturation of `McIntosh' Apples. I. Concentration and Timing of Dilute Applications of AVG
By James Schupp, D. Greene. 2004
92 citations recorded by the source corpus.
To compare the effects of growth regulators on preharvest fruit drop and fruit maturity, aminoethoxyvinylglycine (AVG) was applied to 'McIntosh' apple trees at 75, 150, or 225 mg·L -1 , at 8, 4, or 2 weeks before harvest (WBH). These treatments were compared to NAA, daminozide, and to an untreated control. All AVG treatments and timings except 75 mg·L -1 applied 8 WBH delayed preharvest drop and fruit maturity. AVG applied at 225 mg·L -1 was more effective in delaying drop and development of maturity than other rates when applied 8 or 2 WBH, but at 4 WBH, 150 mg·L -1 gave equivalent results to 225 mg·L -1 . AVG at 150 mg·L -1 was superior to NAA or daminozide as a stop-drop agent. No concentration, or time of application of AVG infl uenced fruit size at harvest. AVG reduced internal ethylene concentration (IEC) in 'McIntosh' apples linearly with increasing AVG concentration. There was a linear relationship between time of AVG application (8, 4, or 2 WBH) and IEC in the fruit after harvest, and the time required for harvested fruit to enter the ethylene climacteric. Development of red color was delayed by AVG. This was attributed to a delay in ripening as determined by a slower increase in IEC and starch hydrolysis. In general, earlier application of AVG resulted in reduced effectiveness of lowering IEC fol- lowing harvest. Chemical names used: aminoethoxyvinylglycine (AVG), naphthaleneacetic acid (NAA), succinic acid-2,2-dimethylhydrazide (daminozide).
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/e9bec29a9e125f95ef567c427e96dddf4193b302
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Citations in the corpus
- Plant Growth Regulators: Backgrounds and Uses in Plant Production (2015, background): “By treating trees some three to four weeks prior to regular harvest ripeness, the resulting ripening delay of one week or more allows for an improved harvesting schedule (Schupp and Greene 2004).”
- NAA and Ethylene Regulate Expression of Genes Related to Ethylene Biosynthesis, Perception, and Cell Wall Degradation During Fruit Abscission and Ripening in ‘Delicious’ Apples (2008, background): “inhibitor of ethylene action, reduced fruit ethylene production and delayed mature fruit abscission and ripening (Schupp and Greene 2004; Yuan and Carbaugh 2007).”