Mechanisms regulating bitter pit development in Greensleeves apples with suppression of ethylene biosynthesis.
Mechanisms regulating bitter pit development in Greensleeves apples with suppression of ethylene biosynthesis.
Author(s): FREITAS, S. T. de; AMARANTE, C. V. T.; MITCHAM, E. J.
Summary: The objectives of this study were to understand the role of ethylene and nutrients (Ca2+,Mg2+, K+ and N) on bitter pit (BP) development in wild type (GS) and ethylene suppressed (68G and 103Y) Greensleeves apples. The transgenic line 68G is suppressed for 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase (ACO) and line 103Y is suppressed for ACC synthase (ACS). Suppression of ethylene biosynthesis reduced BP incidence and severity. Lower ethylene biosynthesis, in ethylene-suppressed genotypes, had no effect on Ca2+, Mg2+, K+ and N concentrations in fruit cortical tissue. In all genotypes, fruit with BP had lower Ca2+ and higher Mg2+ concentrations and higher Mg2+/Ca2+ ratio in cortical tissue. The results indicate that high levels of ethylene biosynthesis and Mg2+ in cortical tissue can enhance fruit susceptibility to BP incidence.
Publication year: 2015
Types of publication: Paper in annals and proceedings
Unit: Embrapa Semi-arid Region
Keywords: ACCO, ACCS, Apple, Apples, Bitter pit, Cálcio, Desordem fisiológica, Distúrbio Fisiológico, Malus Domestica, Maçã, Physiological disorder
Observation
Some of Embrapa's publications are published as ePub files. To read them, use or download one of the following free software options to your computer or mobile device. Android: Google Play Books; IOS: iBooks; Windows and Linux: Calibre.
Access other publications
Access the Agricultural Research Database (BDPA) to consult Embrapa's full library collection and records.
Visit Embrapa Bookstore to purchase books and other publications sold by Embrapa.