The role of invertases in plant compensatory responses to simulated herbivory.

摘要: The ability of a plant to overcome animal-induced damage is referred as compensation or tolerance and ranges from undercompensation (decreased fitness when damaged) overcompensation (increased damaged). Although it clear that genetic variation for exists among plants, little known about the specific underpinnings leading enhanced fitness. Our previous study identified enzyme GLUCOSE-6-PHOSPHATE DEHYDROGENASE 1 (G6PD1) key regulator contributing phenomenon via its role in oxidative pentose phosphate pathway (OPPP). Apart G6PD1 we also an invertase gene which was up-regulated following potentially integrates with OPPP. family enzymes hydrolyze sucrose glucose fructose, whereby produced shunted into OPPP presumably supports regrowth, development, ultimately compensation. In current study, measured relative expression 12 genes over course development Arabidopsis thaliana genotypes Columbia-4 Landsberg erecta, typically overcompensate undercompensate, respectively, damaged. We compared compensatory performances set knockout mutants wild type. report significantly 9 damaged undamaged, overcompensated fruit production. contrast, down-regulated two suffered reduced Knockout both exhibited significant production, exhibiting complete reversal type Col-4’s overcompensation. Collectively, these results confirm invertases are essential not only normal growth but plants’ abilities regrow compensate apical damage.