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Genotypes of black oak tree

Based on the data below, which of these tree genotypes of black oak (Quercus velutina) appeared to be most capable of avoiding dehydration? Which appeared to be most capable of tolerating dehydration? And which displayed the most phenotypic plasticity in response to drought? Justify your answers.

Genotype    Treatment    at Full hydration    at Turgor Loss Point    at Root Ψ of -4 MPa
A                Irrigated       -1.5                       -2.1                             65
                  Drought        -1.9                       -2.5                             58
B                Irrigated       -1.1                       -1.6                             45
                  Drought        -1.5                       -2.1                             44
C                Irrigated       -0.9                       -1.4                             75
                  Drought        -1.6                       -2.2                             62

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