Ivr2，玉米叶片液泡转化酶活性数量性状位点的一个候选基因。水分胁迫下的基因特异性表达。

Ivr2, a candidate gene for a QTL of vacuolar invertase activity in maize leaves. Gene-specific expression under water stress.

作者信息

Pelleschi S, Guy S, Kim J Y, Pointe C, Mahé A, Barthes L, Leonardi A, Prioul J L

机构信息

Structure et Métabolisme des Plantes, Institut de Biotechnologie des Plantes, Université de Paris-Sud, Orsay, France.

出版信息

Plant Mol Biol. 1999 Jan;39(2):373-80. doi: 10.1023/a:1006116310463.

DOI:10.1023/a:1006116310463

PMID:10080702

Abstract

Water shortage produced an early and large stimulation of acid-soluble invertase activity in adult maize leaves whereas cell wall invertase activity remained constant. This response was closely related to the mRNA level for only one of the invertase gene (Ivr2), encoding a vacuolar isoform. In parallel, four quantitative trait loci (QTLs) were detected for invertase activity under control and nine under stressful conditions. One QTL in control and one in stressed plants was located near to the Ivr2 gene on chromosome 5. Other QTLs for invertase activity were found close to carbohydrate QTLs; some of them formed 'stress clusters'.

摘要

缺水对成年玉米叶片中酸溶性转化酶的活性产生了早期且强烈的刺激，而细胞壁转化酶的活性则保持不变。这种反应仅与一种转化酶基因（Ivr2）的mRNA水平密切相关，该基因编码一种液泡同工型。同时，在对照条件下检测到4个与转化酶活性相关的数量性状位点（QTL），在胁迫条件下检测到9个。对照条件下和胁迫条件下各有一个QTL位于5号染色体上靠近Ivr2基因的位置。还发现了其他与转化酶活性相关的QTL靠近碳水化合物QTL；其中一些形成了“胁迫簇”。