Effects of temperature and relative humidity on gas exchange rates of five species of broad-leaved trees.

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  • 温度・湿度条件が５樹種の純光合成・蒸散速度・気孔コンダクタンスにおよぼす影響
  • オンド シツド ジョウケン ガ 5ジュシュ ノ ジュンコウゴウセイ ジョウサン ソクド キコウ コンダクタンス ニ オヨボス エイキョウ

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We have studied the influences of temperature and relative humidity in a chamber on gas exchange rates of leaves of the 5 species of broad-leaved trees. On ANOVA of temperature and species, net assimilation rates and stomatal conductance of all the species were low at temperature of 35°C. Transpiration rates of P. deltoides and Castanopsis cuspidate were increased by the rise of temperature but with Zelkova serrata they were remarkably decreased at more than 25°C. There were no influence of relative humidity to net assimilation rates, stomatal conductance and intercellular CO2 concentration. But there was.interaction between relative humidity and species at stomatal conductance.

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