Analysis of the effect of each plant hormone on the maturation of woodland strawberry fruit in auxin-induced parthenocarpic fruit

• Published in: Bioscience, biotechnology, and biochemistry Vol. 87; no. 6; pp. 592 - 604
• Main Authors: Umemura, Hayato, Nakajima, Masatoshi, Ishii, Hikari, Kurokura, Takeshi, Asami, Tadao, Shimada, Yukihisa, Nakamura, Ayako
• Format: Journal Article
• Language: English
• Published: England Oxford University Press 19.05.2023
• Subjects: Fragaria; Fruit; Gene Expression Regulation, Plant; Indoleacetic Acids - pharmacology; Plant Growth Regulators - pharmacology; Plant Proteins - metabolism; parthenocarpic fruit maturation; plant hormone; Picloram; auxin; woodland strawberry
• ISSN: 1347-6947; 1347-6947
• DOI: 10.1093/bbb/zbad029

ABSTRACT Evaluation of individual roles of plant hormones in fruit development is difficult because various plant hormones function simultaneously. In this study, to analyze the effect of plant hormones on fruit maturation one by one, plant hormones were applied to auxin-induced parthenocarpic woodland strawberry (Fragaria vesca) fruits. As a result, auxin, gibberellin (GA), and jasmonate, but, not abscisic acid and ethylene increased the proportion of ultimately mature fruits. So far, to produce comparable fruit with pollinated fruit in size, auxin with GA treatment was required in woodland strawberry. Picrolam (Pic), the most potent auxin in inducing parthenocarpic fruit, induced fruit which is comparable in size with pollinated fruit without GA. The endogenous GA level and the result of the RNA interference analysis of the main GA biosynthetic gene suggest that a basal level of endogenous GA is essential for fruit development. The effect of other plant hormones was also discussed. Graphical Abstract Graphical Abstract Roles of plant hormones during fruit maturation were evaluated in auxin-induced parthenocarpic woodland strawberry fruit.