Metabolic changes in fruits of the tomato dx mutant

被引：56
|
作者：
Lisso, Janina [1 ]
Altmann, Thomas [1 ]
Muessig, Carsten [1 ]
机构：
[1] Univ Potsdam, D-14476 Golm, Germany
来源：
PHYTOCHEMISTRY | 2006年 / 67卷 / 20期
关键词：
Solanum lycopersicum; Solanaceae; tomato; brassinosteroid; primary metabolism; fruit;
D O I：
10.1016/j.phytochem.2006.07.008
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The tomato DWARF cytochrome P450 protein catalyzes the C-6 oxidation of 6-deoxo-castasterone to castasterone. The d(x) mutant does not produce a functional DWARF enzyme, and d(x) shoots display severe symptoms of brassinosteroid-deficiency. However, fruits express the CYP85A3 protein which compensates for the deficiency of the DWARF protein and produce bioactive brassinosteroids. Here, we report on the metabolic characterization of d(x) fruits. Fruit size, fresh weight, and pigment content were not altered. However, d(x) fruits showed reduced dry mass content. Levels of starch and various sugars were reduced, amino acid levels were elevated. BR application to d' leaves partially normalized dry mass content, sugar and amino acid levels in d(x) fruits. The data demonstrate that brassinosteroid in shoots is required for fruit development in tomato. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2232 / 2238
页数：7
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