Response of prohexadione calcium and paclobutrazol on growth and physio-chemical characteristics of pear cv. Clapp's Favorite

Lal, Manmohan; Mir, Mohammad Maqbool; Iqbal, Umar; Kumar, Ashok

doi:10.5958/0974-0112.2018.00035.x

Cited by 4 publications

(8 citation statements)

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“…Prohexadione spray at 125 mg dm -3 on Golden delicious apple caused increase in fruit weight (212.4 g), fruit diameter (78.9 mm) and fruit L/D ratio (0.92) (Atay and Koyuncu, 2017). Double spray of prohexadione-calcium (200 ppm) resulted in higher fruit weight (82.85 g), fruit length (6.81 cm) and fruit diameter (6.44 cm) as compared to control plants (Lal et al, 2018). Pasa and Einhorn (2017) also noted good result in terms of fruit weight (205.78 g) with pro-ca spray at 250 mg/l as compared to untreated Starkrimson pear trees.…”

Section: Phenotypic Fruit Characteristicsmentioning

confidence: 93%

“…Many of these growth regulators, including the quaternary ammonium compounds, substituted pyrimidines, norbornenodiazetine derivatives, and triazole derivatives function by interrupting the synthesis of gibberellin early in the biosynthetic pathway, specifically at the synthesis of ent-kaurene. Prohexadione-Ca is known to interfere with the 3-ß hydroxylation of GA 20 to GA 1 (Lal et al, 2020 andLal et al, 2018). The net effect is a reduction in immobile, biologically active GA 1 and an increase in the levels of mobile, but inactive GA 20 (Evans et al, 1997;Graebe, 1987).…”

Section: Mode Of Actionmentioning

confidence: 99%

“…Impact of different concentrations of prohexadionecalcium on 0900 Ziraat sweet cherry plants was evaluated by Aglar (2018) who reported that prohexadione-calcium (250 mg/l + AMS) showed a decrease in level of acidity (0.60) as compared to other untreated 0900 Ziraat sweet cherry plants. Double spray of prohexadione-calcium at 200 ppm one at complete petal fall and second at four weeks after first spray resulted in increased percentage of total soluble solids (13.21) and total sugars (10.23) with decreased percentage of fruit acidity (0.43) as compared to untreated pear plants (Lal et al, 2018). Cares et al (2014) reported an increase in total soluble solid content of about 17.4% and 19.1% in the sweet cherry cultivars Lappins and Sweetheart, respectively, with the application of 250 mg/l pro-ca Cetinbas et al (2015) also reported a significant increase in total soluble solid content (14.15%) and a decrease in the level of acidity (0.13%) in Starcrimson apple with the use of (250 g/100 l) proca.…”

Section: Bio-chemical Characteristicsmentioning

confidence: 99%

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Influence of prohexadione-calcium on temperate fruit crops – A Review

Lal¹,

Sood²,

Singh³

et al. 2022

EEC

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Plant growth retardants have great potential to maintain a balance between vegetative and reproductive growth of the plants. Prohexadione-calcium is reported as a novel plant growth retardant that inhibits late stages of gibberellins (GAs) biosynthesis in plants. It is emerged as one of an important management tool that an orchardist has available to control vegetative growth in plants and can enhance flowering and fruit quality. Currently, prohexadione-calcium is considered as a reduced risk compound, since it exhibits negligible toxicological effects and has been reported to degrade in higher plants with a halflife of a few weeks and in soil with a halflife of less than a week. The available literature on the effect of prohexadionecalcium on vegetative growth, fruit set, fruit yield, fruit quality and return bloom have been reviewed in this paper.

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Section: Phenotypic Fruit Characteristicsmentioning

confidence: 93%

Section: Mode Of Actionmentioning

confidence: 99%

Section: Bio-chemical Characteristicsmentioning

confidence: 99%

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Influence of prohexadione-calcium on temperate fruit crops – A Review

Lal¹,

Sood²,

Singh³

et al. 2022

EEC

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“…The effect of PBZ has been described, for example, in pear "Clapp's" (Pyrus communis L.). It was applied via foliar at concentrations of 100, 200 and 300 mg L -1 during the phenological stage of petal fall, which resulted in a 34% increase in yield [12]. In India walnut "Ullal-3" (Anacardium occidentale L.) PBZ was applied to the soil for two years at three concentrations (1, 2 and 3 g L -1 ), prior to flower opening This resulted in an increase in the number of female flowers and an improvement of 54% and 30% in the concentration of chlorophylls a and b, respectively [9].…”

Section: Use Of Pbz In Fruit Treesmentioning

confidence: 99%

“…In the last decade, among the common agronomic management practices for fruit tree production is the use of PBZ, which promotes various effects. For example, in India it is used to increase fruit quality in litchi (Litchi chinensis Sonn) "China" by inhibiting vegetative growth [11], pear "Clapp's" (Pyrus pyrifolia L.) [12] and Indian walnut "Ullal-3" (Anacardium occidentale L.) [9]. In China, it is used to reduce vegetative growth in the cultivation of "Western Schley" and "Mahan" pecan [Carya illinoinensis (Wang.)…”

Section: Introductionmentioning

confidence: 99%

Paclobutrazol and Its Use in Fruit Production: A Review

Orozco-Mel閚dez¹,

Hern醤dez-Rodr韌uez²,

Cruz-羖varez³

et al. 2022

Phyton

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There are documentary records referring to paclobutrazol (PBZ) as a growth bioregulator that inhibits the gibberellin synthesis and its application increases yields in fruit and vegetable crop productions. Its agronomic management includes it as an emerging technology to reduce vigour, promote flower induction and flower development in fruit trees with increased economic returns. Its use is banned in some countries because of concerns about residues that can cause harmful effects on the environment. Therefore, the aim of this article was to collect, analyse and summarise relevant information on the use of PBZ in fruit tree production and its possible risks to the environment. The results obtained indicated that the application of PBZ can be effective in solving some problems related to flowering if it is applied in the right amount and at the right time. However, it is necessary to elucidate the physiological processes with which it is associated and its response to be taken into account to increase yield. PBZ is currently used in fruit trees such as mango, lime, apple and guava, increasing their productivity. However, some studies have shown its residual effect on the environment. Therefore, PBZ is a viable strategy, because it presents a series of advantages in the production of fruit trees. However, it is vital to generate protocols that seek its regulation with a rational and sustainable approach.

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Prohexadione-calcium improves grape quality by regulating endogenous hormones, sugar and acid metabolism and related enzyme activities in grape berries

Li,

Yang,

Dai

et al. 2024

BMC Plant Biol

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Prohexadione-Calcium (Pro-Ca) plays key roles in improving fruit quality and yield by regulating various aspects of plant growth. However, the effects of how Pro-Ca regulates the regulation of sugar and acid balance and its impact on the production of volatile aroma substances during fruit growth and development are poorly understood. In this study, the Pro-Ca solutions developed at concentrations of 200, 400, 600 and 800 mg·L-1 were sprayed on the entire “Chardonnay” grape tree 22, 42, 62 and 82 days after initial flowering. The values of endogenous hormones, sugar and acid content, enzyme activities and flavor content were then measured in grapes 45, 65, 85 and 105 days (ripeness stage) after the initial flowering. The results showed that Pro-Ca had significant effects on fruits during development, including reducing ABA content, increasing ZT, GA3 and IAA levels, promoting fruit ripening and enhancing enzymes, which are involved in sugar and acid synthesis. Consequently, these effects led to an increase in sugar and acid content in the berries. Particularly during the ripening phase, the application of 600 mg L-1 Pro-Ca resulted in an increase in soluble sugar content of 11.28% and a significant increase in citric acid and malic acid content of 97.80% and 68.86%, respectively. Additionally, Pro-Ca treatment enhanced both the variety and quantity of aroma compounds present in the berries, with the 600 mg·L-1 Pro-Ca treatment showcasing the most favorable impact on volatile aroma compounds in ‘Chardonnay’ grapes. The levels of aldehydes, esters, alcohols, phenols, acids, ketones, and terpenes were significantly higher under the 600 mg·L-1 Pro-Ca treatment compared to those of control with 51.46 − 423.85% increase. In conclusion, Pro-Ca can regulate the content of endogenous hormones and the activities of enzymes related to sugar and acid metabolism in fruit, thereby increasing the content of soluble sugar and organic acid in fruit and the diversity and concentration of fruit aroma substances. Among them, foliar spraying 600 mg · L-1 Pro-Ca has the best effect. In the future, we need to further understand the molecular mechanism of Pro-Ca in grape fruit to lay a solid foundation for quality improvement breeding.

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Response of prohexadione calcium and paclobutrazol on growth and physio-chemical characteristics of pear cv. Clapp's Favorite

Cited by 4 publications

References 0 publications

Influence of prohexadione-calcium on temperate fruit crops – A Review

Influence of prohexadione-calcium on temperate fruit crops – A Review

Paclobutrazol and Its Use in Fruit Production: A Review

Prohexadione-calcium improves grape quality by regulating endogenous hormones, sugar and acid metabolism and related enzyme activities in grape berries

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