Molecular and physiological evidence suggests the existence of a system II-like pathway of ethylene production in non-climacteric Citrus fruit

Publication Overview
TitleMolecular and physiological evidence suggests the existence of a system II-like pathway of ethylene production in non-climacteric Citrus fruit
AuthorsKatz E, Lagunes P, Riov J, Weiss D, Goldschmidt E
TypeJournal Article
Journal NamePlanta
Volume219
Issue2
Year2004
Page(s)243-252
CitationKatz E, Lagunes P, Riov J, Weiss D, Goldschmidt E. Molecular and physiological evidence suggests the existence of a system II-like pathway of ethylene production in non-climacteric Citrus fruit. Planta. 2004; 219(2):243-252.

Abstract

Mature citrus fruits, which are classified as non-climacteric, evolve very low amounts of ethylene during ripening but respond to exogenous ethylene by ripening-related pigment changes and accelerated respiration. In the present study we show that young citrus fruitlets attached to the tree produce high levels of ethylene, which decrease dramatically towards maturation. Upon harvest, fruitlets exhibited a climacteric-like rise in ethylene production, preceded by induction of the genes for 1-aminocyclopropane-1-carboxylate (ACC) synthase 1 (CsACS1), ACC oxidase 1 (CsACO1) and the ethylene receptor CsERS1. This induction was advanced and augmented by exogenous ethylene or propylene, indicating an autocatalytic system II-like ethylene biosynthesis. In mature, detached fruit, very low rates of ethylene production were associated with constitutive expression of the ACC synthase 2 (CsACS2) and ethylene receptor CsETR1 genes (system I). CsACS1 gene expression was undetectable at this stage, even following ethylene or propylene treatment, and CsERS1 gene expression remained constant, indicating that no autocatalytic response had occurred. The transition from system II-like behavior of young fruitlets to system I behavior appears to be under developmental control.
Features
This publication contains information about 1 features:
Feature NameUniquenameType
ACC oxidaseACC oxidasegenetic_marker
Stocks
This publication contains information about 1 stocks:
Stock NameUniquenameType
ValenciaValenciaaccession
Properties
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Property NameValue
Publication Date2004
Published Location|||
Language Abbreng
Publication TypeJournal Article
KeywordsCitrus sinensis, oranges, fruit trees, fruit crops, fruits (plant anatomy), ethylene production, plant proteins, 1-aminocyclopropane-1-carboxylate synthase, gene expression regulation, signal transduction, citrus peels, plant damage, 1-aminocyclopropane-1-carboxylate oxidase, ethylene receptor