Postharvest Auxin and Methyl Jasmonate Effect on Anthocyanin Biosynthesis in Red Raspberry (Rubus idaeus L.)

Autor(es)

Moro, Lais ; Aymoto Hassimotto, Neuza Mariko ; Purgatto, Eduardo

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PLANT GROWTH REGULATION; v. 36, n. 3, p. 773-782, SEP 2017.
• Citações Web of Science: 6

Resumo

Fruit color is fundamental for consumer acceptance. There is evidence that plant growth regulators, such as indole-3-acetic acid (IAA) and methyl jasmonate (MJ), are related to the inhibition or increase of flavonoids in red raspberries (Rubus idaeus L.). We evaluated the effect of IAA and MJ treatment in the anthocyanin content in red raspberries cv. Autumn Bliss. Ethylene, IAA, and MJ levels were determined, as well as the relative transcript levels of anthocyanidin synthase (ANS, leucocyanidin oxygenase; EC 1.14.11.19), dihydroflavonol 4-reductase (DFR; dihydrokaempferol 4-reductase; EC 1.1.1.219), and MYB10, a transcriptional regulator of the anthocyanin pathway in raspberries were also determined. The MJ-treated fruits developed an intense red color 2 days after harvest (DAH) and prior to anthocyanin accumulation, which was associated with an increase in the relative expressions of MYB10, ANS, and DFR. Five DAH, the anthocyanin and the total phenolic contents were lower in the IAA-treated fruit than the control group. These effects were related to the inhibition of MYB10 and ANS transcription and correlated to changes in IAA and MJ contents in the fruit flesh. These results suggest that anthocyanin metabolism is regulated by the interplay of multiple hormonal signs, including IAA and MJ, affecting specific steps during raspberry maturation, such as transcription factors of the anthocyanin pathway. (AU)

• Processo FAPESP: 13/09303-6 - Reguladores de crescimento vegetais associados à biossíntese de compostos voláteis do aroma em frutos climatéricos e não-climatéricos
• Beneficiário: Eduardo Purgatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07914-8 - FoRC - Centro de Pesquisa em Alimentos
• Beneficiário: Bernadette Dora Gombossy de Melo Franco
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 11/05583-9 - Regulação hormonal da biossíntese de antocianinas em framboesas (Rubus idaeus) no período pós-colheita
• Beneficiário: Laís Moro
• Modalidade de apoio: Bolsas no Brasil - Mestrado