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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Postharvest conservation of lisianthus inflorescences with bioregulators

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Autor(es):
Cristiane Calaboni [1] ; Ricardo Alfredo Kluge [2] ; Ana Paula Preczenhak [3] ; Claudia Fabrino Machado Mattiuz [4]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Universidade de São Paulo. Ciências Biológicas - Brasil
[2] Universidade de São Paulo. Ciências Biológicas - Brasil
[3] Universidade de São Paulo. Ciências Biológicas - Brasil
[4] Universidade de São Paulo. Produção Vegetal - Brasil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Bragantia; v. 82, 2023-05-22.
Resumo

ABSTRACT Cut flowers are known for their beauty and variety of colors and shapes. However, they quickly lose their commercial value after harvest due to the intensity of physiological processes that result in senescence. This work aimed to evaluate the effects of bioregulators on the postharvest longevity of lisianthus flowers (Eustoma grandiflorum cv. Flare Deep Rose) by applying a pulsing solution for 24 hours. The treatments consisted of 70 µM of 6-benzylaminopurine (BAP); 5 µM of gibberellic acid (GA3); 10 µM of abscisic acid (ABA); and deionized water as control. Turgidity, floral development, total and reducing sugar contents, respiration rate, colorimetry, anthocyanin contents, phenolic compound contents, and phenylalanine ammonia-lyase (PAL) enzyme activity were evaluated. BAP resulted in higher PAL enzyme activity and greater accumulation of anthocyanins when compared to the other treatments. The treatment GA3 resulted in the highest increase in respiration rate during storage, causing a larger number of inflorescences with wilting and senescence symptoms, reducing postharvest quality. The treatment ABA resulted in greater turgidity and floral opening, delayed senescence, and maintained respiration rate due to the greater total sugar contents on the fourth and 12th days. The application of ABA contributes to the maintenance of inflorescence quality for lisianthus at postharvest, but it reduces anthocyanin contents, providing petals with lighter colors. (AU)

Processo FAPESP: 19/01156-0 - Perda de função da enzima fitoeno-sintase e sua relação com a via do etileno e do ácido abscísico durante o amadurecimento pós-colheita de frutos de tomateiro
Beneficiário:Ricardo Alfredo Kluge
Modalidade de apoio: Auxílio à Pesquisa - Regular