Polytolerance to abiotic stresses: how universal is the shade–drought tolerance trade‐off in woody species?

摘要: Aims According to traditional ecophysiological theories stress tolerance of plants is predominately determined by universal physiochemical constraints. Plant acclimation environmental therefore compromises plant performance under a different stress, hindering successful toleration several abiotic factors simultaneously. Yet recent studies have shown that these trade-offs are less exclusive than postulated so far, leaving more wiggle room for gaining polytolerance through adaptations. We tested whether shade and drought depends on cold waterlogging tolerances – hypothesizing patterns in species groups (angiosperms versus gymnosperms; deciduous evergreen; originating from North America, Europe East Asia) depend the length vegetation period dormancy limiting duration favourable growing season. Location Northern Hemisphere. Methods Our study analysed four main shade, drought, 806 Northern Hemisphere woody using cross-calibrated rankings. The importance among ecological potentials was evaluated species-specific estimates chosen factors. Results We found both negatively related capabilities simultaneously tolerating low-light low-water conditions. While this pattern angiosperms gymnosperms, region origin leaf type had no effect relationship. Main conclusions Our results demonstrate adaptation highly complex. key explaining why capable habitats where relatively short water table high. enables successfully face additional besides gymnosperms lower polytolerance, but can better tolerate when other favourable.