Differential expression of alternative oxidase genes in soybean cotyledons during postgerminative development

被引：58

作者：

McCabe, TC

Finnegan, PM

Millar, AH

Day, DA

Whelan, J ^{[1
]}

机构：

[1] Univ Western Australia, Dept Biochem, Perth, WA 6907, Australia

[2] Australian Natl Univ, Fac Sci, Div Biochem & Mol Biol, Canberra, ACT 0200, Australia

来源：

PLANT PHYSIOLOGY | 1998年 / 118卷 / 02期

关键词：

D O I：

10.1104/pp.118.2.675

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The expression of the alternative oxidase (AOX) was investigated during cotyledon development in soybean (Glycine max [L.] Merr.) seedlings. The total amount of AOX protein increased throughout development, not just in earlier stages as previously thought, and was correlated with the increase in capacity of the alternative pathway. Each AOX isoform (AOX1, AOX2, and AOX3) showed a different developmental trend in mRNA abundance, such that the increase in AOX protein and capacity appears to involve a shift in gene expression from AOX2 to AOX3. As the cotyledons aged, the size of the mitochondrial ubiquinone pool decreased. We discuss how this and other factors may affect the alternative pathway activity that results from the developmental regulation of AOX expression.

引用

页码：675 / 682

页数：8

共 55 条

[1] Targeting the plant alternative oxidase protein to Schizosaccharomyces pombe mitochondria confers cyanide-insensitive respiration [J].