Effect of Paclobutrazol (Pp333) on Apple Shoot Growth

Quinlan, J. D.; Richardson, Phyllis

doi:10.17660/actahortic.1984.146.10

Cited by 41 publications

(35 citation statements)

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“…As a result, inhibitors of GA-biosynthesis have been evaluated as tools for restricting vegetative growth or promoting floral initiation. Among those PGRs, paclobutrazol of a triazole group is most useful for this purpose (Quinlan and Richardson, 1984;Steffens et al, 1992). Chlormequat and daminozide are also well-known inhibitors of GA-biosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Effects of Prohexadione-Ca, Ethephon, and Water Stress on Growth and Productivity of 'Golden Delicious'/M.9 Apple

Guak

2013

Korean Journal of Horticultural Science and Technology

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Abstract. Prohexadione-calcium (Pro-Ca), ethephon and transient water stress were evaluated in a factorial design, as potential inhibitors of early-season shoot growth of high density orchard management of apple (Malus domestica Borkh.) trees. In the experiment, water stress was imposed to one-half of the 7-year-old 'Golden Delicious'/M.9 apple trees in each of 5 blocks, by stopping irrigation for 3 weeks between 35 and 56 days after full bloom (AFB). Within each whole unit, the following Pro-Ca and ethephon treatments were randomly allocated at 2 × 2 factorial: a) 0 or 250 mg･L -1 a.i. Pro-Ca applied at 28 days AFB and b) 0 or 300 mg･L -1 a.i. ethephon applied twice (35 and 71 days AFB). All trees were hand thinned to king flowers prior to treatments. Vegetative shoot growth was markedly reduced by Pro-Ca, with its effect being obvious within 14 days after application, while ethephon and water stress treatments were less effective. Pro-Ca had no effect on fruit set and yield but slightly increased fruit size. Ethephon substantially reduced the fruit size and yield but had no effect on fruit set. Water stress reduced fruit set, fruit size and yield. With regard to fruit quality, Pro-Ca did not influence fruit shape, flesh firmness and soluble solids contents (SSC) but slightly reduced titratable acidity. Ethephon had no effect on fruit shape but increased firmness, SSC and acidity, while water stress did not influence these fruit quality attributes. Dry weight of dormant spur buds was reduced by both Pro-Ca and water stress, while increased by ethephon. The larger dormant buds led to the larger spur flowers at the tight cluster stage the following spring. Return flowering was promoted only by ethephon, especially on previous season's shoots. There were no significant interactions between Pro-Ca and ethephon or water stress on most variables observed in this study.Additional key words: fruit quality, fruit set, gibberellin biosynthesis inhibitor, return bloom, specific leaf weight, stomatal conductance, water potential

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Section: Introductionmentioning

confidence: 99%

Effects of Prohexadione-Ca, Ethephon, and Water Stress on Growth and Productivity of 'Golden Delicious'/M.9 Apple

Guak

2013

Korean Journal of Horticultural Science and Technology

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“…The work of Quinlan and Richardson (1984) and Williams (1984) would suggest that higher concentrations may give even better control over shoot growth .…”

Section: Discussionmentioning

confidence: 99%

“…Of this group, paclobutrazol has been the most intensively tested for its effects as a growth retardant on pip and stonefruit (Quinlan andRichardson 1984, Williams 1984) . Results have been promising, and registration has been obtained in the UK for pip and stonefruit .…”

Section: Abstract the Growth Retardants Paclobutrazol (3-[(4-chloromentioning

confidence: 99%

Growth retarding effects of paclobutrazol and RSW 0411 on Granny Smith and Fuji apple trees

Irving¹,

Pallesen²

1989

J Plant Growth Regul

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. The growth retardants paclobutrazol (3-[(4-chlorophenyl)methyl]-a-(1,1-dimethylethyl)-IH-1,2,4-triazole-l-ethanol)and RSW 0411 ((3-(cyclohexyl methylene)-a-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol) were tested on two-year-old trees of Granny Smith and Fuji apple . RSW 0411 at 100 mg/L did not cause any growth reduction in Granny Smith, while 500 and 1000 mg/L significantly reduced growth below that of the control between 27 and 40 days after application . Paclobutrazol at 100 mg/L had a small effect on growth of Granny Smith shoots ; however 500 mg/L significantly reduced shoot growth between 27 and 55 days after application, and 1000 mg/L reduced shoot growth between 27 and 82 days after application . By 100 days after application, there were no longer differences between treatments . Shoot growth on Fuji trees was reduced below that of the control as follows : between 14 and 27 days following a single application of 500 mg/L RSW 0411 ; between 27 and 55 days following two applications ; between 14 and 72 days following three applications ; and between 14 and 82 days following four applications . Treatments were applied 14 days apart . Paclobutrazol was a more active growth retardant than RSW 0411 at the same rate, and the growth-retarding effects of RSW 0411 were short-lived .In recent years, trees in many New Zealand apple orchards have been planted intensively ; 3-5 m between rows and 1-3 m within rows . In Europe, most trees at these spacings are planted on the dwarfing M 9 or M 26 rootstocks ; however, in New Zealand, trees continue to be planted on the semi-dwarfing MM 106 rootstock .Growers and advisors thought that height and spread of trees on MM 106, at close spacings, would be adequately controlled through early cropping . How-

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“…Banganpalli (Bhagwan et al, 2011). The effect of paclobutrazol in improving flowering percent was due to its anti gibberellins activity (Quinlin and Richardson, 1984). Spraying of NAA @ of 50-100 ppm has shown the effect in early flowering (Davenport, 2007) in mango.…”

Section: Issn: 2319-7706 Volume 6 Number 8 (2017) Pp 481-493mentioning

confidence: 99%

Flowering and Production Improvement Studies of Mango cv. Banganpalli in Relation to Plant Growth Regulators and Chemicals

Bhagwa¹,

Raj²,

mar³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Effect of Paclobutrazol (Pp333) on Apple Shoot Growth

Cited by 41 publications

References 0 publications

Effects of Prohexadione-Ca, Ethephon, and Water Stress on Growth and Productivity of 'Golden Delicious'/M.9 Apple

Effects of Prohexadione-Ca, Ethephon, and Water Stress on Growth and Productivity of 'Golden Delicious'/M.9 Apple

Growth retarding effects of paclobutrazol and RSW 0411 on Granny Smith and Fuji apple trees

Flowering and Production Improvement Studies of Mango cv. Banganpalli in Relation to Plant Growth Regulators and Chemicals

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