NA+/H+ ANTI-PORTER GENE, AND IMPROVEMENT OF BASE RESISTANCE BY EXPRESSION OF THE GENE

摘要

PROBLEM TO BE SOLVED: To find a useful gene capable of improving the base resistance of a plant by the technology of genetic industry, and to provide a method for using the gene to develop and create a base-resistant crop, thus contributing to the improvement of food production.;SOLUTION: This DNA encoding a Na⁺/H⁺ anti-porter originated from base- resistant Aphanothece halopytica. The DNA encoding the Na⁺/H⁺ anti-porter originated from the Aphanothece halopytica is characterized by substantially not exhibiting a Li⁺/H⁺ anti-porter activity in the whole pH region but exhibiting Ca²⁺/H⁺ anti-porter activity in neutral and alkaline pH regions. And a DNA containing a base sequence encoding the following protein (a) or (b) or its partial sequence. (a) The protein comprising a specific amino acid sequence. (b) The protein comprising the amino acid sequence (a) wherein one or more amino acids are deleted, substituted or added, and having a Na⁺/H⁺ anti-porter activity.;COPYRIGHT: (C)2003,JPO