Effects of salt stress on ion balance and nitrogen metabolism of old and young leaves in rice (Oryza sativa L.).

ABSTRACT:

Background

It is well known that salt stress has different effects on old and young tissues. However, it remains largely unexplored whether old and young tissues have different regulatory mechanism during adaptation of plants to salt stress. The aim of this study was to investigate whether salt stress has different effects on the ion balance and nitrogen metabolism in the old and young leaves of rice, and to compare functions of both organs in rice salt tolerance.

Results

Rice protected young leaves from ion harm via the large accumulation of Na+ and Cl- in old leaves. The up-regulation of OsHKT1;1, OsHAK10 and OsHAK16 might contribute to accumulation of Na+ in old leaves under salt stress. In addition, lower expression of OsHKT1;5 and OsSOS1 in old leaves may decrease frequ

SUBMITTER: Wang H 

PROVIDER: S-EPMC3496643 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature