Manipulation of vegetative growth and improvement of yield potential of cashew (Anacardium occidentale L.) by Paclobutrazol

Mog, Babli; Janani, P.; Nayak, M.G.; Adiga, J. D.; Meena, Rajesh Kumar

doi:10.1016/j.scienta.2019.108748

Cited by 20 publications

(21 citation statements)

References 45 publications

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“…El efecto positivo observado en el rendimiento, posiblemente puede atribuirse a la reducción de la altura y en la limitación del crecimiento vegetativo. De esta forma, se obtienen plantas más compactas y los fotoasimilados dirigidos a la formación de hojas jóvenes se redistribuyen hacia el desarrollo de órganos reproductivos, lo que favorece la iniciación floral, número de flores por inflorescencia y cuajado de frutos (Mog et al, 2019), aunque en este caso no hubo diferencias significativas en el número de frutos cosechados.…”

Section: Resultados Y Discusiónunclassified

Evaluación de dosis, periodos de aplicación y residualidad de paclobutrazol en tomate

Juárez-Rodríguez

Pérez-Grajales

Castro-Brindis

et al. 2021

Bioagro

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El Paclobutrazol (PBZ) es el retardante de crecimiento más utilizado en la manipulación química del crecimiento y desarrollo de plantas hortícolas. Se estudió el efecto de aplicaciones foliares de paclobutrazol en distintas dosis e intervalos de aplicación sobre el crecimiento vegetativo, rendimiento, calidad fisicoquímica y residualidad en frutos de tomate Saladette (Solanum lycopersicum L.), en un ciclo largo de producción en invernadero. El experimento se realizó en 2019 en Chiconcuac, estado de México. Se evaluaron 13 tratamientos de la combinación de tres dosis de PBZ (35, 50 y 65 mg·L-1) y cuatro intervalos de aplicación (30, 40, 50 y 60 días), más un control absoluto. El diseño experimental fue de bloques completos al azar con cuatro repeticiones y seis plantas como unidad experimental. Se cuantificaron variables morfológicas, de rendimiento, calidad fisicoquímica y residuos de PBZ en frutos. Los resultados mostraron que la aplicación de 50 mg·L-1 de PBZ cada 40 días incrementó significativamente (P≤0,05) el rendimiento de frutos por planta; en contraste, disminuyó la altura y el área foliar de la planta, sin afectar el peso seco y firmeza del fruto. Se detectaron residuos de PBZ en la epidermis de frutos que rebasaron los límites máximos de residuos (LMR) permitidos según la Unión Europea y Japón; existió una degradación constante del producto con el tiempo, pero la misma no alcanzó el 50 % 14 días después de su aplicación. Se encontró que el lavado de frutos con agua simple o detergente eliminó casi la totalidad de los residuos adheridos en la epidermis del fruto y no hubo residuos en el interior.

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Section: Resultados Y Discusiónunclassified

Evaluación de dosis, periodos de aplicación y residualidad de paclobutrazol en tomate

Juárez-Rodríguez

Pérez-Grajales

Castro-Brindis

et al. 2021

Bioagro

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“…Previous reports indicate that low concentrations of these compounds facilitate agronomic management, and their effect can be linked to inhibition, slowing and induction of sprouting, flowering and fruit ripening [5]. Among these growth bioregulators is paclobutrazol (PBZ) (growth inhibitor) [6][7][8], which reduces vigour, and promotes flower induction and development [9,10].…”

Section: Introductionmentioning

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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“…It inhibits the synthesis of endogenous gibberellin and has roles in the control of height and dwarfing, cell division and elongation, and the regulation of crop growth and development [ 14 , 15 ]. Many studies have investigated the effects of paclobutrazol on grain yield in other green manure crops [ 16 – 18 ]. Papageorgiou et al [ 19 ] and Khan and Tewari [ 20 ] found that foliar application of paclobutrazol can inhibit plant growth and significantly increase the number of flowers, the number of pods per inflorescence, and grain yield in Medicago sativa .…”

Section: Introductionmentioning

confidence: 99%

Flower and pod development, grain-setting characteristics and grain yield in Chinese milk vetch (Astragalus sinicus L.) in response to pre-anthesis foliar application of paclobutrazol

et al. 2021

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The number of grains per unit land area is the most important grain yield component in Chinese milk vetch. Flower and pod survival seem to be critical determinants of grain number, which is related to the number of fertile flowers and pods during the anthesis period. Flower and pod growth are frequently considered the key determinants to establish grain number. The objective of this study was to explore the influences of paclobutrazol on flower and pod development, grain-setting characteristics and grain yield in Chinese milk vetch under different concentrations of foliar spray and try to explore the physiological regulatory mechanisms. Field experiments were carried out during the 2017–2018 and 2018–2019 growing seasons at the Dayuzhuang experimental field. The experiment involved the Chinese milk vetch cultivar “Xinzi No. 1” and six levels of foliar application of paclobutrazol, 0, 200, 300, 400, 500, and 600 mg L-1, in treatments CK, T1, T2, T3, T4, and T5, respectively. Foliar spray was applied once, at the squaring stage. In comparison with the CK treatment, all of the paclobutrazol treatments yielded, to various degrees, increased values of the number of inflorescences per unit area, number of pods per unit area, grain-setting rate of pods, and number of grains per pod in all six inflorescence layers, with the largest increases observed in the T3 treatment. In the T3 treatment compared with the CK treatment, from the first to sixth inflorescence layers, the number of inflorescences per unit area was increased by 34.07–58.97%, the number of pods per unit area was increased by 39.69–68.35%, the grain number per pod was increased by 44.31–53.69%, and the grain-setting rate of pods was increased by 1.84–4.89%. An analysis of yield composition revealed that the paclobutrazol spray treatment had little impact on the grain weight of Chinese milk vetch. The correlations between the concentration of paclobutrazol spray and the grain yield of Chinese milk vetch reached a significant level. Grain yield was highest at the paclobutrazol concentration of 373.10 mg/L. The inflorescence contents of gibberellic acid 3 (GA3), indole-3-acetic acid (IAA), and abscisic acid (ABA) were reduced, whereas that of cytokinin (CTK) was increased, by foliar application of paclobutrazol (400 mg L-1, T3 treatment) relative to CK treatment during the stages of flowers and pods developing into grains.

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Manipulation of vegetative growth and improvement of yield potential of cashew (Anacardium occidentale L.) by Paclobutrazol

Cited by 20 publications

References 45 publications

Evaluación de dosis, periodos de aplicación y residualidad de paclobutrazol en tomate

Evaluación de dosis, periodos de aplicación y residualidad de paclobutrazol en tomate

Paclobutrazol and Its Use in Fruit Production: A Review

Flower and pod development, grain-setting characteristics and grain yield in Chinese milk vetch (Astragalus sinicus L.) in response to pre-anthesis foliar application of paclobutrazol

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