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- Title
Physiological Study of Ethephon- and ACC-Induced Fruitlet and Leaf Abscission in Peach Trees Under Different Conditions of Temperature.
- Authors
Torres, Estanis; Asín, Luís
- Abstract
The effect of temperature on the ability of 2-chloroethylphosphonic acid (ethephon, ETH) and the 1-aminocyclopropane carboxylic acid (ACC) to induce ethylene production in fruitlets and abscission of fruitlets and leaves when applied at postbloom (~15 mm fruit diameter) was studied using 5-year-old 'Sweet Lady'/Rootpac-20 peach [Prunus persica (L.) Batsch] trees kept in pots in environment-controlled growth rooms. ETH at 150 mg L−1 and ACC at 500 mg L−1 effectively thinned peaches. Increasing the temperature from 10 to 20 °C pronounced the ETH-induced fruit and leaf abscission and the ACC-induced leaf abscission and decreased stomatal conductance in leaves. However, the ACC thinning effect was not affected by increasing temperature, as well as ETH- and ACC-induced ethylene production in fruitlets and in the quantum yield of PSII photochemistry. Changes in ethylene peak in fruitlets and stomatal conductance in leaves were related to the abscission response.
- Subjects
PEACH; TEMPERATURE effect; PLANT regulators; PRUNUS; CARBOXYLIC acids; ETHEPHON
- Publication
Journal of Plant Growth Regulation, 2023, Vol 42, Issue 7, p4253
- ISSN
0721-7595
- Publication type
Article
- DOI
10.1007/s00344-022-10888-8