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Thinning flat peaches with ethephon and its effect on endogenous ethylene production and fruit quality
Scientia Horticulturae ( IF 4.3 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.scienta.2020.109872
Estanis Torres , Jordi Giné-Bordonaba , Luís Asín

Abstract Peach orchards are usually hand-thinned at around 40–60 days after bloom, but this practice is labor-intensive and costly. Ethylene plays a key role in peach fruitlet abscission and foliar applications of ethephon have been reported to be effective in some cultivars to induce fruit abscission. However, results are inconsistent and there are no experiences about its application in flat peaches and/or about inducing flowers abscission. Ethephon (from 0 to 300 mg L–1) was applied to ‘Flatbeauti’ peach trees at 30 % and 100 % of full bloom and 30, 40 and 50 DAFB to determine the best time to induce flowers or fruitlet abscission, as well as to investigate its effect on fruit quality parameters and its relationship to the ethylene evolution pattern throughout peach fruit growth. Abscission and ethylene production were related to ethephon concentration. In general, as a mean of three independent experiments, there was an 8–9 % reduction in fruit set, a 3–14 % increase in fruit size, and a 10–16 % reduction in yield, with each incremental increase of 75 mg L–1 ethephon. The late ethephon applications increased ethylene endogenous production up to harvest and this influenced fruit maturity. Finally, our results indicate that ethephon in the range of 150 mg L–1 can be used at 100 % full bloom and at 30–40 DAFB to induce adequate levels of fruit crop load in ‘Flatbeauti’ peaches without other side effects.

中文翻译:

乙烯利疏扁桃及其对内源乙烯产量和果实品质的影响

摘要 桃园通常在开花后 40-60 天进行人工间伐,但这种做法劳动密集且成本高昂。乙烯在桃子落果中起关键作用,据报道,叶面喷施乙烯利在一些品种中可有效诱导桃子落果。然而,结果并不一致,没有将其应用于扁桃和/或诱导落花的经验。将乙烯利(0 至 300 mg L–1)以 30% 和 100% 的盛开度和 30、40 和 50 DAFB 施用于“Flatbeauti”桃树,以确定诱导花朵或果实脱落的最佳时间,以及研究其对果实品质参数的影响及其与整个桃果实生长过程中乙烯演化模式的关系。脱落和乙烯产量与乙烯利浓度有关。一般来说,作为三个独立实验的平均值,坐果量减少 8-9%,果实大小增加 3-14%,产量减少 10-16%,每增加 75 毫克L-1乙烯利。乙烯利的后期应用增加了收获前的乙烯内源产量,这影响了果实的成熟度。最后,我们的结果表明,在 150 mg L–1 范围内的乙烯利可以在 100% 盛开和 30–40 DAFB 下使用,以在 'Flatbeauti' 桃中诱导足够水平的果实作物负荷,而没有其他副作用。每增加 75 mg L-1 乙烯利。乙烯利的后期应用增加了收获前的乙烯内源产量,这影响了果实的成熟度。最后,我们的结果表明,在 150 mg L–1 范围内的乙烯利可以在 100% 盛开和 30–40 DAFB 下使用,以在 'Flatbeauti' 桃中诱导足够水平的果实作物负荷,而没有其他副作用。每增加 75 mg L-1 乙烯利。乙烯利的后期应用增加了收获前的乙烯内源产量,这影响了果实的成熟度。最后,我们的结果表明,在 150 mg L–1 范围内的乙烯利可以在 100% 盛开和 30–40 DAFB 下使用,以在 'Flatbeauti' 桃中诱导足够水平的果实作物负荷,而没有其他副作用。
更新日期:2021-02-01
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