Drought increases chlorophyll content in stems of Vitis interspecific hybrids

Abstract Plants respond to drought stress through different physiological mechanisms. To highlight a specific adaptation strategy related stem photosynthetic activity, woody tissue pigmentation was studied. In this work, 25 Vitis hybrids were studied in two experimental vineyards: one of them with sufficient water availability and the other showing stress. 1500 reflectance spectra tissues collected. Beside spectral elaboration interpretation, indexes for pigment quantification calculated. The content proportion chlorophylls ( b ) stems significantly modified response Genotypes classified based on their plasticity/elasticity adaptive/susceptible behavior. cluster analysis produced 4 main groups average variations between watered conditions. most interesting genotypes concerning trait pointed out. Nevertheless, mechanism could also be due an increased detoxification necessity disfunctions caused by A multi-parameter approach is encouraged phenotyping abiotic tolerant plant selection. next future, work will support release new rootstocks viticulture.