Transcriptomics of plant responses to apical damage reveals no negative correlation between tolerance and defense

摘要: While one may expect the loss of plant tissue by animal herbivores to be universally detrimental a plant’s fitness, wide range tolerance responses exists, including undercompensation (lower fitness when damaged), equal compensation, and even overcompensation (increased damaged). Theory predicts that these could constrained investment into defensive chemicals structures produced for improving resistance in damaged tissues, thus induced defense considered alternative strategies selection pressure imposed herbivory. To determine which genetic pathways underlie differences compensatory (i.e., growth fitness) damage loss, test their relation with involved defense, we performed controlled greenhouse study measure total gene expression via RNA-sequencing undamaged mechanically plants three Arabidopsis thaliana genotypes differ performances: Columbia-4, Landsberg erecta, recombinant inbred line (RIL) from Columbia-4 × Landsberg erecta cross. Among many responded clipping, Columbia-4 significantly up-regulated genes secondary chemistry equally compensated while RIL both undercompensated down-regulated pathways. The genotypes’ different performances are positively correlated differential investments metabolism following loss. This identifies post-damage regulation growth, developmental signaling, environmental response A. thaliana, provides first transcriptomic evidence counter presumed tradeoff between plant-herbivore interactions.