Abstract
Photosynthesis and transpiration were simultaneously measured under different light intensity, temperature and humidity conditions inSasa nipponica andArundinaria pygmaea grown in exposed and shaded habitats. Both species showed a saturated light curve for photosynthetic rate. The saturation point was lower in shaded plants. The apparent quantum yields were larger inS. nipponica and in shaded plants, while the maximum photosynthesis was higher inA. pygmaea and exposed plants. The temperature response of photosynthesis showed an optimum curve in both species. The optinum temperatures were 20 C inS. nipponica and 25 C inA. pygmaea. The influence of humidity on photosynthesis was insignificant for both species. The responses of transpiration to light intensity and relative humidity showed a saturated curve and an optimal one, respectively. There was a significant relationship between transpiration and stomatal frequency, both of which were higher inS. nipponica, while water use efficiency was higher inA. pygmaea. These results suggest thatS. nipponica adapts itself better to shaded, low temperature and less water stress habitats as compared withA. pygmaea.
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Agata, W., Hakoyama, S. & Kawamitsu, Y. Influence of light intensity, temperature and humidity on photosynthesis and transpiration ofSasa nipponica andArundinaria pygmaea . Bot Mag Tokyo 98, 125–135 (1985). https://doi.org/10.1007/BF02488792
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DOI: https://doi.org/10.1007/BF02488792