Morphological and physiological responses of two contrasting Poplar species to drought stress and exogenous abscisic acid application

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Sodium chloride-ABA interaction in two common bean (Phaseolus vulgaris) cultivars differing in salinity tolerance (2007, background): “Exogenous ABA facilitates the adaptation to salinity of cells in tissue culture (Mills et al., 2001), reduces leaf abscission and increases salt tolerance in citrus plants (G´ omez-Cardenas et al., 2003) and decreases total biomass and increases root to shoot ratio in poplar species ( Yin et al., 20”
Differences in some morphological, physiological, and biochemical responses to drought stress in two contrasting populations of Populus przewalskii (2006, background): “Apart from these morphological changes, plants have evolved to employ a variety of physiological and biochemical processes ranging from photosynthesis to antioxidant defenses and solute accumulation as components of drought tolerance (Yin et al. 2004).”
How tree roots respond to drought (2015, background): “For example, research carried out on two poplar species revealed signiﬁcant diﬀerences in the root-to-shoot ratio under drought treatment (Yin et al., 2004).”
A Review of Fine Root Dynamics in Populus Plantations (2006, background): “Poplar root systems as a whole comprise a significant portion of the plant; generally 25–35% of whole-plant biomass (Heilman et al. 1994; Pregitzer and Friend 1996), and in juvenile trees up to 63% (King et al. 1999; Yin et al. 2004).”