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Analysis of CO2 Fixation Capacity in Leaves of Ten Species in the Family Fagaceae

제주도 자생 참나무과 식물의 대기 중 CO2 흡수 능력의 비교분석

  • Received : 2011.10.18
  • Accepted : 2011.12.22
  • Published : 2012.01.31

Abstract

The rate of photosynthesis (A) of leaves from 10 plant species (6 evergreen and 4 deciduous) of the family Fagaceae was measured using a portable photosynthesis analyzer, to examine which species take up $CO_2$ most efficiently. Of the evergreen species, the photosynthetic rate of Castanopsis cuspidata var. sieboldii was highest, and remained above 82.1~106.4 ${\mu}mol\;kg^{-1}s^{-1}$ from July to November. Of the deciduous species, the photosynthetic rate of Quercus acutissima was higher than that of the other three species, and remained high at 83.5~116.6 ${\mu}mol\;kg^{-1}s^{-1}$ from September to November. The photosynthetic rate of the 10 species was positively correlated with stomatal conductance (gs) and transpiration rate (E). However, there was no correlation between photosynthetic rate and intercellular $CO_2$ concentration ($C_i$), although there was a positive correlation just in three species (Q. gilva, Q. acutissima and Q. glauca). These results suggest that the $CO_2$ fixation capacity of C. cuspidata var. sieboldii, an evergreen species, and Q. acutissima, a deciduous species, is significantly higher than that of the other species examined, and that photosynthesis is regulated by both stomatal conductance and transpiration. Therefore, C. cuspidata var. sieboldii and Q. acutissima may be valuable for the evaluation of carbon uptake in urban green spaces as well as in afforested areas.

Keywords

Fagaceae;Photosynthetic rate;Castanopsis cuspidata var. sieboldii;Quercus acutissima;$CO_2$ fixation capacity

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