Performance of Hormonal Content and Branching of Apple Nursery Trees After Ba (6-Benzyladenine) Application

Steiner, Marcelo Gomes; Hrotkó, K.; Végvári, György

doi:10.17660/actahortic.2013.981.66

Cited by 7 publications

(3 citation statements)

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“…Differences in trunk diameter of grafted young 'Gala' apples was observed by DORIC et al (2015) when 6-BA was sprayed three times in the concentrations of 250 and 350 mg L -1 reduced trunk diam-eter compared to untreated grafted young plants. Same was observed by STEINER et al (2013) where 'Golden Delicious' grafted young plants had a lower trunk diameter compared to untreated grafted young plants. Furthermore, ROSSI et al (2004) found that 6-BA + GA 4+7 sprayed once in different concentrations (0, 500, 1000, and 1500mg L -1 ) decreased trunk diameter of young grafted plants of 'Catarina' apples, but the differences were not statistically significant.…”

Section: Resultssupporting

confidence: 67%

Improving feathering in different nursery apple trees by plant growth regulators

Carra,

Cabrera,

Rodriguez

et al. 2023

Rev. Bras. Frutic.

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Feathering in apple nursery trees is a critical operation used to increase the quality of planting material. Plant growth regulators (PGR) could be used to form feathers in apple nursery trees. The main goal was to study the impact of different PGR and concentrations on feathering promotion in different nursery apple trees. The study had three different trials where the specific aims were to study the impact of: i) different rates of 6-benzyladenine (6-BA); ii) different PGR (6-BA and 6-BA + GA4+7) on feathering promotion, and; iii) 6-BA on feathering promotion and prohexadione calcium (P-Ca) on trunk thickening under greenhouse conditions. Both 6-BA and 6-BA + GA4+7 were effective inducing feathering in the different cultivars tested. 6-BA reduced final young plants grafted height only in one out of three seasons, reducing an average of 15 and 10 cm on ‘Early Red One’ and ‘Fuji’ apple nursery trees, respectively. P-Ca reduced tree growth rate 4-5 weeks after sprayed, but the difference did not persist until the end of the season. Trunk diameter was not affected by the different plant growth regulators and concentrations tested. 6-BA alone or in combination with GA4+7 is an efficient tool to feathering formation in different nursery apple cultivars and conditions.

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Section: Resultssupporting

confidence: 67%

Improving feathering in different nursery apple trees by plant growth regulators

Carra,

Cabrera,

Rodriguez

et al. 2023

Rev. Bras. Frutic.

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“…Nonetheless, when assessing treatment effects, the number of the sylleptic shoot (vary from 4.30 to 5.95 per tree in lower BA concentration compared to 7.1 to 7.8 per tree in higher BA concentration) should also be taken into account, as it can affect the average sylleptic shoot crotch angle, which is wider in the lower tiers of sylleptic shoots than in the higher tiers probably due to longer available growing period. The application of higher concentration of BA or BA+GA for induction of branching in a one-year-old apple nursery 3 tree can result in a narrow crotch angle but still, it did not This is in agreement with the work of Steiner et al (2013) and Doric et al (2016) in apple. Analysis of mean data pertaining to tree height revealed that the application of BA alone and in combination with GA had a mild 3 negative effect on tree height although, the height of the treated tree still met the standard criteria (163.58 to 170.12 cm) (Table 4).…”

Section: Resultssupporting

confidence: 66%

“…The use of aggressive chemical branching agents in apple nursery trees can result in a narrow crotch angle (Steiner et al, 2013). Thus current findings suggest that a higher concentration of BA (500 -700 ppm) acts as an aggressive branching agent compared to the lower rate of BA.…”

Section: Resultsmentioning

confidence: 61%

Influence of plant growth regulators on growth and formation of sylleptic shoots in one-year-old apple cv. Gala Mast

Kumawat¹,

Raja²,

Chand³

et al. 2023

JEB

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Aim: To examine the effectiveness of 6-benzyladenine (BA) alone or in combination with gibberellic acid (GA3) on sylleptic shoots formation on one-year-old apple cv. Gala Mast grafted on MM-106 rootstock. Methodology: During the second vegetative period, the actively growing apical portion of the nursery tree was sprayed with varying doses of BA and BA+GA3 (200, 300, 400, 500, 600, and 700 ppm) using a hand sprayer until run-off. Three spray treatments were performed at one week apart. The first spray was applied when the growth of the central leader reached 70-80 cm. Results: All plant growth regulators treatments significantly increased the number and length of sylleptic shoots, branching zone and per cent branched trees compared to control. The unsprayed trees had an average of 1.95 useful sylleptic per tree, 1.1 m total sylleptic shoot length, 10.24 cm branching zone and 35 per cent branched trees. Application of BA (700 ppm) resulted in four-fold increase in the number of sylleptic shoots (7.8), more than two-fold increase in total length of sylleptic shoots (2.44 m), and around four-fold increase in branching zone (38.96 cm). The 100 per cent branched trees were obtained with the application of BA (500, 600, 700 ppm) and BA+GA3 (600, 700 ppm) in both experimental years. Moreover, these treatments obtained 2.78 to 2.90 values of the trunk and mean sylleptic shoot diameter ratio. Interpretation: Application of BA alone or in combination with GA3 played an important role in overcoming apical dominance and therefore in the production of well-branched apple nursery tree. However, application of BA alone has a stronger positive effect on sylleptic shoot formation. More than 400 ppm BA appears to give a significant stimulation for the production of sylleptic shoots, with the highest beneficial effect reported with the application of 700 ppm BA. However, it is cost-effective to apply 3 sprays of 500 ppm BA for adequate growth and sylleptic shoot production. Key words: 6-benzyladenine, Gibberellic acid, Nursery tree, Plant growth regulators, Sylleptic shoot

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Enhancing feathering of one- and two-year-old nursery trees of ‘Granny Smith’ apple cultivar using benzyladenine and gibberellins

Doric¹,

Keserović²,

Magazin³

et al. 2016

Acta Hortic.

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Performance of Hormonal Content and Branching of Apple Nursery Trees After Ba (6-Benzyladenine) Application

Cited by 7 publications

References 0 publications

Improving feathering in different nursery apple trees by plant growth regulators

Improving feathering in different nursery apple trees by plant growth regulators

Influence of plant growth regulators on growth and formation of sylleptic shoots in one-year-old apple cv. Gala Mast

Enhancing feathering of one- and two-year-old nursery trees of ‘Granny Smith’ apple cultivar using benzyladenine and gibberellins

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