Dry Matter and Nutrient Partitioning, Seasonal Water Consumption and Gas-Exchange of Paclobutrazol Growth-Controlled Apple Trees

Bonomo, Robson; Neri, D.; Sansavini, Silviero

doi:10.17660/actahortic.1989.239.21

Cited by 4 publications

(5 citation statements)

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“…Calcium: Increased concentration of foliar Ca with paclobutrazol application was observed in Nemaguard [84], Flordaprince [85], Flordaprince and Flordagold peach cultivars [86] and Red Spur Delicious and Vance Delicious apples [87]. Similar observations regarding the increase in foliar Ca concentrations in various apple cultivars were made by Bonomo et al [91]. Swietlik and Miller [92] further reported that Ca content in Golden Delicious increased in proportion to the increasing doses of PP333.…”

Section: Nutrient Uptakesupporting

confidence: 60%

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Response of Growth Inhibitor Paclobutrazol in Fruit Crops

Ashraf¹,

Ashraf²

2020

Prunus

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Paclobutrazol (PBZ; IUPAC name: (2RS, 3RS)-1-(4-chlorophenyl)-4, 4-dimethyl-2-(1H-1, 2, 4-triazol-1-yl) pentan-3-ol) is a triazol derivative and an antagonist of gibberellins. It has been shown to inhibit shoot growth in various perennial fruit trees. Paclobutrazol application reduced the number of shoots, transforming trees into a more desirable, spur-type growth habit as the vegetative sink was reduced. This compound induces an early and intense flowering, diminishing vegetative growth and reducing the extension of buds, allowing for ripening and the initiation of apical buds inflorescence. Besides, it also increases fruit set, the years following application as a carryover effect. An increase in return bloom is a common response to paclobutrazol treatment and has been reported for various fruit crops. Paclobutrazol is widely used to advance harvest maturity in various fruit crops and it improves fruit quality in terms of accelerated colour development, delayed and synchronized fruit maturation and control of preharvest fruit drop. It is known to improve fruit physical and fruit chemical characteristics. Fruit calcium is increased for 2–3 years due to carry over effect. It helps in the maintenance of better fruit quality during storage and influences nutrient uptake in various fruit crops including stone fruits. It has been characterized as an environmentally stable compound in soil and water environments with a long half-life under both aerobic and anaerobic conditions.

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Section: Nutrient Uptakesupporting

confidence: 60%

“…Magnesium: Foliar Mg content has been reported to increase with paclobutrazol application in Nemaguard [84], Flordaprince [85], Flordaprince and Flordagold peach cultivars [86], Red Spur Delicious and Vance Delicious apples [87] and apple plants [91]. But Curry [88] found reduced levels of foliar Mg in apple plants treated with PP333.…”

Section: Nutrient Uptakementioning

confidence: 99%

Response of Growth Inhibitor Paclobutrazol in Fruit Crops

Ashraf¹,

Ashraf²

2020

Prunus

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“…Similar observations regarding the increase in foliar Ca concentrations in various apple cultivars were made by Atikson and Crisp (1983), Swietlik and Miller [51], Curry [120] and [121]. Swietlik and Miller [51], further reported that Ca content in Golden Delicious increased in proportion to the increasing doses of PP333.…”

Section: Carbohydrate Contentsupporting

confidence: 78%

“…Whereas in Top Red Delicious plants treated with PP333, Wieland and Wample (1985) observed reduction in reducing sugars with 150 mg, increase in starch with 25 and 50 mg than those with 150 mg dose of PP333. In apple plants PP333 treatments resulted in the depletion of carbohydrates [120] and starch in shoots [121]. However, Sharma and Joolka [122], observed increased leaf total carbohydrates content with paclobutrazol in Non Pareil almond plants.…”

Section: Carbohydrate Contentmentioning

confidence: 99%

“…Sharma and Joolka [39] also recorded increased leaf Ca content with paclobutrazol in Non Pareil almond plants. Magnesium: Foliar Mg content has been reported to increase with PP333 treatment in Nemaguard [123], Flordaprince [26,124], Flordaprince and Flordagold peach cultivars [125] , Red Spur Delicious and Vance Delicious apples [54] and apple plants [121]. But Curry [120] found reduced levels of foliar Mg in apple plants treated with PP333.…”

Section: Carbohydrate Contentmentioning

confidence: 99%

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Paclobutrazol Boost up for Fruit Production: A review

Yadav¹

2020

RIJEES

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Paclobutrazol (PBZ), a triazole derivative, has been effectively used to induce and manipulate 􀏐flowering, fruiting, and tree vigor in several perennial fruit crops. Soil application of paclobutrazol has been ef􀏐efficacious in promoting 􀏐lowering and increasing yield in many fruit crops. However, there are some con􀏐licting reports on its impact on fruit quality parameters. Besides reducing gibberellins level, PBZ increases cytokinin contents, root activity and C: N ratio, whereas its in􀏐luence on nutrient uptake lacks consistency. The ability of the crops to produce fruits throughout the year is of great interest in recent years. Usually, it is applied as a soil application in the month of September-November in the case of mango. It inhibits gibberellins biosynthesis at the kaurene stage and has proved to be a reduction of vegetative growth, promising for 􀏐lower initiation in shoot bud, giving early and profuse 􀏐lowering, increases fruit yield and improving quality regularly in alternate bearing cultivars. The main aim of this review is to focus upon contemporary information about paclobutrazol in fruit production. The persistence of culture in orchard soil for a long time and its half-life varies with soil type and climatic conditions, which may severely affect the development of subsequent crops and moved rapidly between the shoot tips and basal nodes both in the acropetal and basipetal directions and persisted for several months. The potential of PBZ to contaminate groundwater at optimum concentrations is low however the risk of its exposure to aquatic life is high. PBZ is considered moderately hazardous for human beings with remote chance of being genotoxic and carcinogenic. In view of the above, optimized use of the PBZ to derive maximum bene􀏐it with the least undesirable impact on food and environmental safety aspects are suggested.

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