Root temperature effects on 'Arkin' carambola (Averrhoa carambola L.) trees I. Leaf gas exchange and water relations
作者： Hilary L George , Frederick S Davies , Jonathan H Crane , Bruce Schaffer
DOI: 10.1016/S0304-4238(02)00090-0
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摘要: Abstract The effects of root temperatures on leaf gas exchange and water relations 1-year-old ‘Arkin’ carambola (Averrhoa L.) trees in containers were investigated controlled temperature chambers a glasshouse. Average xylem potentials (Ψl) more negative for grown at 5, 10 or 38 °C compared to those 20 25 °C. net CO2 assimilation (A) was consistently greater 25 °C all other treatments. There no significant differences transpiration (E) among the In contrast, stomatal conductance (gs) highest exposed 5 10 °C, intermediate 38 °C, lowest Optimum are than 10 °C but less likely between Reduced tree growth that has been observed low (5 10 °C) high (38 °C) appears be, part, result reduced A stress.
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