Abstract
Arabidopsis thaliana has many ecotypes (accessions) in the world. Although there are few differences among their nucleotide sequence, it has revealed that they show various phenotypes in response to environmental stresses. To identify natural variability in salt stress tolerance, we compared their salt tolerances during vegetative stage among 354 ecotypes, collected in RIKEN BRC. We obtained some salt or sensitive ecotypes. In this study, we investigated the salinity tolerance during germination about these ecotypes. As a result, we found the tendency that the tolerant ecotypes during vegetative stage showed hyper-sensitive to salt stress during germination, conversely the hyper-sensitive ecotypes during vegetative stage showed salt tolerance during germination. It is known that this tendency is observed in halophytes. To reveal the opposite correlation in salt tolerance between vegetative stage and germination, we mapped the both genes responsible for the salt tolerance during vegetative stage and germination using an ecotype, Zu-0.
