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Abscisic acid (ABA) is a well known stress hormone regulating drought adaptation of plants. Here, we hypothesised that genetic engineering of genes involved in ABA stress signalling and photoperiodic regulation affected drought resistance by trade‐off with biomass production in perennial poplar trees.
We grew Populus tremula × tremuloides wild‐type (T89) and various transgenic lines (two transformation...
•Salinity causes osmotic stress and limits biomass production of plants. The goal of this study was to investigate mechanisms underlying hydraulic adaptation to salinity.
•Anatomical, ecophysiological and transcriptional responses to salinity were investigated in the xylem of a salt‐sensitive (Populus × canescens) and a salt‐tolerant species (Populus euphratica).
•Moderate salt stress, which suppressed...
Black cottonwood (BC, Populus trichocarpa) and hybrid aspen (HA, P. tremula × tremuloides) differ in their ecology of being adapted to wet and drier conditions as riparian and early successional forest species, respectively. We tested the hypothesis that these ecological differences were reflected in higher nitrogen (N) use efficiency in HA than in BC and that HA would allocate more resources belowground...
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