Profiles of Endogenous Plant Hormones during Growth of Strawberry Fruit on Elevated Cultivation Unit

Abstract

To explain the phytohormone profiles of the strawberry fruit, fruits at three stages (green stage, small green; breaker stage, red only at the apex; turning stage, red excluding the apex) were collected, and divided into achenes and receptacles. Indole-3-acetic acid (IAA), abscisic acid (ABA), trans zeatin (Z), isopentenyl adenine (iP), gibberellin 1 (GA 1 ), and gibberellin 4 (GA 4 ) of the achenes and receptacles are quantified with liquid chromatograph-mass spectrometers. (LC-MS). In the achenes, the IAA concentration was higher at the green stage, but decreased rapidly at the breaker stage. In the achenes, Z concentration was low at the green stage, but increased sharply at the breaker stage. The iP concentration was almost the same in the achene and the receptacle, and increased as the stage progressed. The GA 1 concentration was similar in the achenes and receptacles, and was high at the green stage, but decreased rapidly at the breaker stage. The ABA concentration in the achenes and receptacles increased with the stage progressed.

Endogenous Plant Hormone Profiles in Growing Melon Fruit

“…Generally, it softens and liquefies as it grows. Seeds have been reported to have higher IAA concentrations in many fruits than in surrounding tissues (Gillaspy et al, 1993;Kojima et al, 2021). Therefore, it is considered that the IAA concentration in seeds is higher than that in the placenta part.…”