第1156回生物科学セミナー
Leaf traits, gas exchange and reconstruction of palaeo-CO2
Wilfried Konrad（Technical University of Dresden, Germany）
2017年04月07日(金) 16:50-18:20 理学部2号館 201号室
A quantitative model of gas exchange between plant leaves and atmosphere is presented which is based on the laws of physics, a model of photosynthesis, and on leaf anatomy. Additional information is derived from an optimum principle which stipulates that stomata open and close for given temperature and humidity variations in such a way that assimilation is maximised while transpiration is minimised. This allows to calculate ecophysiological quantities such as assimilation and transpiration rate or water use efficiency.
The model can also be used to derive palaeo-CO2 from properties of fossiled leaves, provided palaeo-temperature and -humidity can be assessed independently and the photosynthesis capacity of a related living plant species is known.
参考文献
A. Roth-Nebelsick and W. Konrad. (2016) Habitat responses of fossil plant species to palaeoclimate —Possible interference with CO2?” Palaeogeography, Palaeoclimatology, Palaeoecology.
W. Konrad and A. Roth-Nebelsick. (2011) Integrating Plant Gas Exchange, Soil, and Hydrological Parameters in an Analytical Model: Potential Use and Limitations. Vadose Zone Journal 10.4, p. 1196.
W. Konrad, A. Roth-Nebelsick, and M. Grein. (2008) Modelling of stomatal density response to atmo-spheric CO2. Journal of Theoretical Biology 253.4, pp. 638–658.
