POSSIBILITY OF THE HYDRAULIC QUANTITY ESTIMATION BASED ON THE GROWTH AND MOLECULAR BIOLOGICAL RESPONSES OF PLANTS TO STRESSES CAUSED BY FLOW

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  • 流れによるストレスで生じる植物の生育および分子生物学的応答に基づく水理量推定の可能性

Abstract

<p> Plants exhibit various growth and molecular biological responses to stresses caused by external forces. It is therefore possible that remaining vegetation in river channels might possess information of floods which plants received in the past, as growth and molecular biological information. In this study, to test this possibility, we performed loading experiments in which flow with several hydraulic conditions were applied to plant samples (Arabidopsis thaliana). In the experiments, we analyzed growth and molecular biological responses associated with reactive oxygen species in Arabidopsis plants exposed to the stresses. It was demonstrated that plant diameter can be expressed by the first order system in which plant diameter is inhibited without alteration in the duration of growth. In addition, we also showed that expression of genes involved in the regulation of reactive oxygen species might be correlated with drag. Taken together, these results suggest the possibility that hydraulic information of floods in the past can be obtained from plants.</p>

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