Abstract

Ecophysiological characteristics of plants from different size and life-history classes were investigated in a field population of Crysothamnus nauseosus. Juvenile plants (>1-year-old but pre-reproductive) had higher rates of photosynthesis, stomatal conductance and transpiration than reproductive adults, even though pre-dawn xylem pressure potentials of juveniles were slightly lower. Juveniles were also less water-use efficient than adults based on instantaneous gas exchange (photosynthesis/transpiration) and carbon isotope discrimination (...)

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