Impact of paclobutrazol on gibberellin-like substances and soluble carbohydrates in pear trees grown in tropical semiarid

Autores/as

  • Kellem Sousa Federal University of Piauí. Department of Agricultural Sciences. BR 135 km 3. Planalto Horizonte. Bom Jesus. Piauí State. 64980000. Brazil
  • Paulo Lopes Brazilian Agricultural Research Corporation. Agricultural Research Center of the Semi Arid Tropic. BR 428. Km 152. Zona Rural. Petrolina. Pernambuco state. 56302970. Brazil
  • Ítalo Cavalcante Federal University of the São Francisco Valley. Department of Agricultural Sciences. Rodovia BR 407 - KM 12 - Lote 543 PSNC. s/nº - C1 Petrolina. Pernambuco State. 56.300-990. Brazil
  • Jenilton Cunha Federal University of Piauí. Department of Agricultural Sciences. BR 135 km 3. Planalto Horizonte. Bom Jesus. Piauí State. 64980000. Brazil
  • Luan Silva State University of the North Fluminense Darcy Ribeiro. Department of Vegetables Production. Campos dos Goytacazes, Rio de Janeiro State. Av. Alberto Lamego. 2000 - Parque Califórnia. 28.013-602. Brazil
  • Emmanuella Pereira Federal University of São Francisco. Central for Analysis of Drugs. Medicines and Food. Avenida José de Sá Maniçoba. S/N. Petrolina. Pernambuco state. 56304-205.Brazil
  • Jackson Lobo Federal University of Paraíba. Department of Phytotechnics and Environmental Sciences. Rodovia PB 079 - Km 12. Areia. Paraíba State. 58.397-000. Brazil

DOI:

https://doi.org/10.48162/rev.39.064

Palabras clave:

Pyrus sp., regulador del crescimiento, ácido giberélico, PBZ

Resumen

Given that Brazilian pear production is unable to meet the annual demand, to consider the possible expansion to non traditional growing regions, turns interesting. Even though under tropical semi-arid conditions pear trees have vigorous vegetative growth, a negative influence on flower bud differentiation and formation affects fruit yield. Our study aimed to evaluate the inhibition efficiency of paclobutrazol (PBZ) on gibberellin biosynthesis, vegetative growth, and carbohydrate production in two pear-tree
cultivars (‘Santa Maria’ and ‘Hosui’) grown under semi-arid conditions. To this end, two experiments were conducted, one for each pear-tree cultivar. The experimental designs consisted of randomized blocks, with factorial arrangement (5x2x4), corresponding to PBZ doses (0.0, 0.5, 1.0, 1.5, and 2.0 g per linear meter of plant canopy), PBZ application forms (soil and foliar), and evaluation dates (30, 60, 90, and 120 days after application). Both soil and foliar applications inhibited gibberellin biosynthesis in both cultivars, especially after 120 days of application. PBZ affected leaf total soluble carbohydrates and reduced sprout growth in both cultivars. Although PBZ can be potentially used in pear management, further studies are still required to determine specific management practices in tropical semi-arid zones.

Highlights:

  • Inhibition of gibberellin biosynthesis is more efficient with soil application of paclobutrazol.
  • Soil application of paclobutrazol results in greater production of carbohydrates.
  • There is a difference in sensitivity to the effects of paclobutrazol among pear varieties.
  • The non-application of paclobutrazol results in late maturation of the branches, compromising floral induction.

Descargas

Publicado

04-07-2022

Cómo citar

Sousa, K., Lopes, P., Cavalcante, Ítalo, Cunha, J., Silva, L., Pereira, E., & Lobo, J. (2022). Impact of paclobutrazol on gibberellin-like substances and soluble carbohydrates in pear trees grown in tropical semiarid. Revista De La Facultad De Ciencias Agrarias UNCuyo, 54(1), 46–56. https://doi.org/10.48162/rev.39.064

Número

Sección

Ecofisiología y Manejo de cultivo