Improvement of Fruit Set on Young Pear Trees Cultivar Conference With Gibberellins

Deckers, T.; Schoofs, H.

doi:10.17660/actahortic.2002.596.126

Cited by 18 publications

(20 citation statements)

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“…Several studies have reported positive effects of gibberellins (Hawerroth et al 2011, Vercammen and Gomand 2008, Deckers and Schoofs 2002 and TDZ (Amarante et al 2002, Petri et al 2001, Bianchi et al 2000 on fruit set of apple and pear trees when applied at full bloom. Significant increase in fruit set induced by TDZ 10 and 20 mg L -1 sprayed at full bloom was observed in 'Packham's Triumph' (Petri et al 2001) and 'Shinseiki' (Hawerroth et al 2011) pears, respectively.…”

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confidence: 99%

“…The higher fruit set induced by these substances is usually due to a higher rate of parthenocarpy (Vercammen andGomand 2008, Petri et al 2001), which in some cases may lead to misshapen fruits (Bianchi et al 2000), mainly in response to high rates of TDZ (Greene 1995). Besides, the application of gibberellins may reduce flower bud formation and return bloom (Deckers and Schoofs 2002). Ethylene is also involved on the senescence and abscission of flowers and young fruits.…”

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Thidiazuron (TDZ) increases fruit set and yield of ‘Hosui’ and ‘Packham’s Triumph’ pear trees

Pasa

Silva

Carra

et al. 2017

An. Acad. Bras. Ciênc.

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The low fruit set is one of the main factors leading to poor yield of pear orchards in Brazil. The exogenous application of thidiazuron (TDZ) and aminoethoxyvinilglycine (AVG) has shown promising results in some pear cultivars and other temperate fruit trees. The objective of this study was to evaluate the effect of TDZ and AVG on fruit set, yield, and fruit quality of 'Hosui' and 'Packham's Triumph' pears. The study was performed in a commercial orchard located in São Joaquim, SC. Plant material consisted of 'Hosui' and 'Packham's Triumph' pear trees grafted on Pyrus calleryana. Treatments consisted on different rates of TDZ (0 mg L -1 , 20 mg L -1 , 40 mg L -1 and 60 mg L -1 ) sprayed at full bloom for both cultivars. An additional treatment of AVG 60 mg L -1 was sprayed one week after full bloom in 'Hosui'. The fruit set, number of fruit per tree, yield, fruit weight, seed number, and fruit quality attributes were assessed. Fruit set and yield of both cultivars are consistently increased by TDZ, within the rates of 20 to 60 mg L -1 . Besides, its application increased fruit size of 'Hosui' and did not negatively affect fruit quality attributes of both cultivars.

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confidence: 99%

Thidiazuron (TDZ) increases fruit set and yield of ‘Hosui’ and ‘Packham’s Triumph’ pear trees

Pasa

Silva

Carra

et al. 2017

An. Acad. Bras. Ciênc.

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“…Antagonistic correlations between potassium and sodium were also reported by Hey, Kramer (1993) and Song, Fujiyama (1996). Talon et al (1992), Deckers (2002) and Dorcey et al (2009) also reported that foliar application of plant growth regulating substances, particularly GA 3 , have positive effect on yield quality and quantity. It may be due to the fact that during flowering and fruit setting stages, there is a critical demand for physiological activation to perform biological reactions in plants, which require a high amount of K and other nutrients (Ding et al 2006).…”

Section: Discussionmentioning

confidence: 97%

Cumulative effect of potassium and gibberellic acid on growth, biochemical attributes and productivity of F1 hybrid cucumber

Pal¹,

Yadav²,

Kumar³

et al. 2016

EEB

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Cucumis sativus L. is an important fruit vegetable with great economic potential. A study was carried out to evaluate the potential of exogenously applied potassium nitrate [in combination on growth, development and yield of the F1 hybrid cucumber cv. 'KUK-9' under protected cultivation. Growth and physiological parameters like vine length, fresh weight, dry weight, number of branches, number of leaves, growth rate, biomass duration, chlorophyll and mineral content were observed after 70 days. Overall results suggest that all the combination treatments showed beneficial effects over the control, but foliar application of G 2 K 2 had maximum effect on growth and development of plants. Total yield and fruit quality were also significantly higher in G 2 K 2 treatment than in other treatments. Foliar application of potassium and gibberellic acid may be effective to maximize cucumber growth, physiological status and yield parameters.

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“…The use of mineral elements in this respects were cited on pear fruit using boron (Gobara, 1998;Taher and Hassan, 2005); boron and calcium (Abd El-Megeed et al, 2007); boron and zinc (Canesin et al, 2010); gibberellins (Deckers and Schoofs, 2002); bioregulator, combined applications auxin, cytokinin and gibberellin (Lafer, 2008); amino acids and polyamines (Franco-Mora et al, 2005); growth regulators, nutrients and amino acids (Stino et al, 2011) were also tried.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Determination of Nutritional Status of Pear Trees According to a New Index - Deviation From Optimum Percentage (DOP)

Mirabdulbaghi¹

2015

Cercetari Agronomice in Moldova

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ABSTRACT. This experiment was conducted in a private orchard (Kosar) in district of Shahriar of Alborz province (Iran), during 2012-2013, to determine the effects of B and Zn applied on flowers at full bloom stage on leaf macro and micronutrient contents at 90 days after full bloom (DAFB) of three pear cultivars (Spadona and Duchesse and a pear cultivar from Iranian national collection, named as Daregazi). The deviation from the optimum percentage (DOP) index of macro and micronutrients for two studied years was used to evaluate the nutritional status: optimal (DOP = 0), deficiency (DOP < 0) or excess (DOP > 0). The ΣDOP for two studied years is obtained by adding the values of DOP index irrespective of sign. The larger the ΣDOP, the greater is the intensity of imbalances among nutrients. In general, a DOP value close to the optimum level (DOP = 0) were observed in treated studied pear cultivars with B and Zn applied on flowers at full bloom stage compared with the control trees (without any application of boron and zinc). The DOP macro and DOP micro were, respectively, positive and negative for all of studied pear cultivars regardless of treatments. According to £DOP index (during 2012-2013), the combination of both products (borax+zinc sulfate treatments) at full bloom stage applied on flowers of three pear cultivars (Spadona, Duchesse and Daregazi) showed better balanced nutritional values than the rest of treatments.

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Improvement of Fruit Set on Young Pear Trees Cultivar Conference With Gibberellins

Cited by 18 publications

References 0 publications

Thidiazuron (TDZ) increases fruit set and yield of ‘Hosui’ and ‘Packham’s Triumph’ pear trees

Thidiazuron (TDZ) increases fruit set and yield of ‘Hosui’ and ‘Packham’s Triumph’ pear trees

Cumulative effect of potassium and gibberellic acid on growth, biochemical attributes and productivity of F1 hybrid cucumber

Investigations on Determination of Nutritional Status of Pear Trees According to a New Index - Deviation From Optimum Percentage (DOP)

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