Title:	Mechanisms regulating bitter pit development in Greensleeves apples with suppression of ethylene biosynthesis.
Authors:	FREITAS, S. T. de AMARANTE, C. V. T. MITCHAM, E. J.
Affiliation:	SERGIO TONETTO DE FREITAS, CPATSA; CASSANDRO V. T. AMARANTE; ELIZABETH J. MITCHAM.
Date Issued:	2015
Citation:	In: CONGRESSO BRASILEIRO DE PROCESSAMENTO MÍNIMO E PÓS COLHEITA DE FRUTAS, FLORES E HORTALIÇAS, 1.; SIMPÓSIO BRASILEIRO DE PÓS-COLHEITA, FRUTAS, HORTALIÇAS E FLORES, 5.; ENCONTRO NACIONAL SOBRE PROCESSAMENTO MÍNIMO DE FRUTAS E HORTALIÇAS, 8., 2015, Aracaju. Avanço na conservação e qualidade de frutas, flores e hortaliças: anais. Aracaju: Universidade Federal de Sergipe: Embrapa, 2015.
Description:	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.
Thesagro:	Maçã Cálcio Distúrbio Fisiológico Malus Domestica
NAL Thesaurus:	Bitter pit Apples
Keywords:	ACCO ACCS Desordem fisiológica Apple Physiological disorder
Type of Material:	Artigo em anais e proceedings
Access:	openAccess
Appears in Collections:	Artigo em anais de congresso (CPATSA)