Plant Growth Regulators Modify Fruit Set, Fruit Quality, and Return Bloom
HORTSCIENCE 56(8):922–931. 2021. https://doi.org/10.21273/HORTSCI15835-21 additional or complementary solution to enhance fruit set. Treatments with PGRs can elicit a wide variety of effects and plant Plant Growth Regulators Modify Fruit responses, including manipulation of fruit size, fruit set, fruit maturation, and fruit shape Set, Fruit Quality, and Return Bloom in tree fruit species, including sweet cherries (Greene, 1988; Ryugo, 1988; Stosser€ and in Sweet Cherry Anvari, 1982). Various concentrations of PGRs have different effects on fruit set in pear Irfan Ali Sabir, Xunju Liu, and Songtao Jiu (Pyrus communis) (Zhang et al., 2007), plum Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao (Prunus domestica) (Webster, 1984), and Tong University, Minhang, Shanghai 200240, People’s Republic of China sweet cherries (Zhang and Whiting, 2011). There are myriad studies on the effects of Matthew Whiting PGRs in tree fruit, and results vary with PGR Department of Horticulture and Landscape Architecture, Washington State application timing, concentration, and even with application technology. In previous University, Irrigated Agriculture Research and Extension Center, 24106 N. studies, preharvest applications of gibberel- Bunn Road, Prosser, WA 99350 lins during the stage II–III transition in sweet cherry have increased fruit size and delayed Caixi Zhang maturation (Clayton et al., 2006; Facteau Department of Plant Science School of Agriculture and Biology, Shanghai Jiao et al., 1985; Kappel and MacDonald, 2002, Tong University, Minhang, Shanghai 200240, People’s Republic of China 2007; Lenahan et al., 2006; Proebsting et al., 1973; Stern et al., 2007; Usenik et al., 2005; Additional index words.
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