Abstract
Aquaporins of higher plants form the large family. It has been proved one after another that aquaporins transport various low molecule solute. Since influx and efflux of water and solute at a certain cell in plant tissue affect water potential of surrounding cells, we suppose that expression controls of aquaporins closely relate each other.
Expression data from The Rice Expression Database (RED) and sequences around promoter regions of aquaporin genes from rice genome database were analyzed. In the results from a series of experiments investigating rice seedling under salt stress (Project ID2102 by Tanaka Yoshiki, 2001), time slots of synchronous decrease of many aquaporins, 0-1, 2-3, 4-5 h in roots and 2-3 h in leaves, and synchronous increase of 5-6 h in roots and 1-2 h in leaves were observed in the initial 6 hours. Motifs concerning this synchronous change are searching in promoter regions of aquaporin genes.
