Induction of physiological memory by allelochemical substances in Sorghum bicolor

Abstract

The memory of unfavorable situations is evident in the animal kingdom. In plants the stress memory has been proven as the presence of cold, drought and herbivory events. The memory of the invading agent or its substances released seems to bring adaptive advantages to the plant, but has still been little reported in the scientific literature. This study considers the root vegetable main body which remains in direct contact with the allelochemicals present in soil solutions and therefore should exhibit morphological and physiological adjustments. We hypothesize that these molecular and morphological and physiological adjustments should occur before subsequent stress characterizing the stress memory, the methylation pattern of SHR genes, REV, PHB, PHV and GST, leading to the detoxification process, establishment and maintenance of individuals with a history contact and recognition of allelochemicals. Therefore, we aim to understand the chemical interaction bringing elements of printability stress occurred by histone methylation pattern that reverberate adjustments at different levels of organization (molecular - physiological - morphological) of susceptible plant. Therefore, we aim to: i. evaluate whether the gene expression of SHR, type transcription factors homeodomain LEUCINE ZIPPER (HDZIPIII) REV, PHB, PHV, miRNA 165 and 166 will change in plant roots submitted to the allelopathic compounds and if this change is related to physiological changes development and functionality of rai, ii. describe the biological effects of allelochemicals in root tissue and cell ultrastructure and relate them with the pattern of gene root development expression investigate whether allelochemicals induce the occurrence of H3K4me3 in SHR genes, REV, PHB, PHV and GST, featuring the memory of stress. In this way, we can advance in studies on the chemical interaction between plants to elucidate the existence of stress memory and consequently changes in molecular responses, physiological and morphological, anatomical roots in recurrent allelochemical contact. Still, new elements of communication between plants and plant cognition may be shown in this study. (AU)