Use of different plant growth regulators for control of shoot branching in apple and pear trees

Nečas, Tomáš; Wolf, Jan; Kiss, Tomáš; Láčík, J.; Letocha, T.

doi:10.17660/actahortic.2018.1206.31

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…It has been shown that the application of prohexadione-ca on apple trees promotes the formation of fruit buds and increases the levels of cytokinins in developing fruit seeds (Rademacher 2010, Costa and Botton, 2018, Manmohan et al 2020. Moreover, the results of the application of exogenous cytokinins to the cut petiole of spur tissue in apple indicate that a considerable proportion of the applied hormone is transported to the bourse-bud (Ramírez et al 2005, Nečas et al 2018, Bradshaw et al 2020. These experiences support the hypothesis that cytokinins may play a crucial role in the process of flower bud formation in apple.…”

Section: Introductionmentioning

confidence: 56%

Influence of P-Ca on cytokinins in xylem sap and on stomatal resistance in apple

Ramírez¹,

Malendres-Álvarez

Zermeño-González

et al. 2021

Ecosist. Recur. Agropec.

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With the purpose to search upon the cytokinins origin, a study was conducted on the effects of prohexadione-ca (P-Ca) on cytokinins in xylem sap and on stomatal resistance in apple. Golden Delicious seedlings were sprayed with 100 ppm P-Ca. Stomatal leaf resistance was measured at intervals between 1 and 4 hours of spraying and 15 days after the treatment. Golden Delicious trees were sprayed with 200 ppm P-Ca two weeks after full bloom. At intervals between 1 and two weeks after P-Ca treatment, the main de-shooted stem was removed from root system and xylem sap was collected for cytokinins analysis using the suction technique. Prohexadioneca significantly increased stomatal resistance (range 2.74-4.35 s/cm−1) when compared to control (range 2.12-3.44 s/cm−1); however, P-Ca did not modify the level of cytokinins in xylem sap since range values were between 0.10 to 0.20 μg kinetin equivalents/20 ml xylem sap for both, cytokinin and control.

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Section: Introductionmentioning

confidence: 56%

Influence of P-Ca on cytokinins in xylem sap and on stomatal resistance in apple

Ramírez¹,

Malendres-Álvarez

Zermeño-González

et al. 2021

Ecosist. Recur. Agropec.

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“…Another option is chemical induction that is quicker and less labour-intensive. Although many chemicals were tested (Quinlan and Preston, 1973;Cody et al, 1985;Elfving, 2010;Nečas et al, 2018), cytokinin benzyladenine (BA) and a mixture of benzyladenine with gibberellins (GA 4/7 or GA 3) are considered both most universal and reliable (Magyar and Hrotkó, 2002;Elfving and Visser, 2006;Elfving, 2010;Lordan et al, 2017). BA is the main agent inducing branching while GA usually increases the length of the feathers (Magyar and Hrotkó, 2002;Dorić et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Branching of nursery apples and plums using various branching inducing methods

Laňar¹,

Mészáros²,

Kyselová³

et al. 2020

JCEA

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Chemical (benzyladenine -BA, gibberelins -GA 4/7 ), mechanical (leaf pinching), and combined treatments were tested in 2015 and 2016 to increase the number and length of sylleptic side shoots (feathers) on apple (´Rubinola´, ´Topaz´/M9) and plum (´Elena´, ´Tophit´/St. J. A) trees. The numbers of feathers of three different lengths (1-10, 10-30, and >30 cm) were measured as the main indicator of quality along with other important morphological characteristics. The numbers of all feathers on both apple cultivars were the highest when BA was applied four times. However, mainly an increase in the numbers of shorter feathers was observed in both years. The efficiency of leaf pinching of apple trees was low. The numbers of all feathers and feathers 1-10 and 10-30 cm in length were the highest in both plum cultivars when BA was applied four times in both years. In contrast to apples, the induction of feathers longer than 30 cm improved in plum cultivars when pinching was used. Thus this approach can be also effective in organic production. ABSTRAKTV letech 2015 a 2016 byla testována chemická (6-benzyladenin -BA, gibereliny -GA 4/7 ) a mechanická (seštipování listů) ošetření a jejich kombinace pro zvýšení počtu a délky bočních syleptických výhonů (obrostu) jabloní (´Rubinola´, ´Topaz´/M9) a slivoní (´Elena´, ´Tophit´/St. J. A). Hlavním indikátorem kvality výpěstků byl počet výhonů tří různých délek (1-10, 10-30 a >30 cm) spolu s dalšími důležitými měřenými morfologickými charakteristikami. Obě jabloňové odrůdy měly nejvyšší počet výhonů při čtyřikrát opakovaném ošetření BA, ale vliv byl v obou letech zaznamenán pouze na zvýšení počtu kratších výhonů. Seštipování listů mělo u jabloní malou efektivitu. Obě slivoňové odrůdy měly nejvyšší celkový počet výhonů a počty výhonů délky 1-10 cm a 10-30 cm také při čtyřikrát opakovaném ošetření BA v obou letech. Na rozdíl od jabloní byl ale počet výhonů délky nad 30 cm u slivoní nejvíce podpořen v případě provedení samotného seštipování. Proto by seštipování mohlo být efektivně využíváno i v ekologické produkci.

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Use of different plant growth regulators for control of shoot branching in apple and pear trees

Cited by 2 publications

References 10 publications

Influence of P-Ca on cytokinins in xylem sap and on stomatal resistance in apple

Influence of P-Ca on cytokinins in xylem sap and on stomatal resistance in apple

Branching of nursery apples and plums using various branching inducing methods

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