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Hormonal regulation of ripening in the strawberry, a non-climacteric fruit

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Abstract

Anthocyanin accumulation is one measure of ripening in the strawberry (Fragaria ananassa Duch.), a non-climacteric fruit. Neither aminoethoxyvinylglycine, an inhibitor of 1-aminocyclopropane carboxylic acid synthase, nor inhibitors of ethylene action (silver, norbornadiene) affected anthocyanin accumulation in ripening fruit. When the achenes were removed from one half of an unripe fruit there was an accelerated accumulation of anthocyanin and induction of phenylalanine ammonia lyase on the de-achened portion of the ripening fruit. These effects of achene removal could be prevented by the application of the synthetic auxins 1-naphthaleneacetic acid or 2,4-dichlorophenoxyacetic acid to the de-achened surface. The introduction of 1-naphthalene acetic acid into intact unripe strawberry fruit through the peduncle delayed their subsequent ripening, as measured by the accumulation of anthocyanin, loss of chlorophyll and decrease in firmness. These findings suggest that the decline in the concentration of auxin in the achenes as strawberry fruit mature modulates the rate of fruit ripening.

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Abbreviations

ACC:

1-aminocyclopropane-1-carboxylic acid

AVG:

aminoethoxyvinylglycine

NAA:

1-naphthaleneacetic acid

PA1:

phenylalanine ammonia-lyase

POA:

phenoxyacetic acid

2,4-D:

2,4-dichlorophenoxyacetic acid

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Given, N.K., Venis, M.A. & Gierson, D. Hormonal regulation of ripening in the strawberry, a non-climacteric fruit. Planta 174, 402–406 (1988). https://doi.org/10.1007/BF00959527

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  • DOI: https://doi.org/10.1007/BF00959527

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