Effects of sulfur dioxide on growth and net photosynthesis of six Japanese forest tree species grown under different nitrogen loads

Experimental Studies on the Effects of Ozone on Growth and Photosynthetic Activity of Japanese Forest Tree Species

“…Ozone exposure has been shown to reduce the concentration of total soluble protein (TSP) in the leaves of Q. serrata and Japanese beech (Watanabe et al, 2007;Yamaguchi et al, 2007a, b). Watanabe et al (2007) and Yamaguchi et al (2007b) reported that the exposure to O 3 reduced photosynthetic nitrogen use efficiency (PNUE) in the leaves of Q. serrata and Japanese beech. In the case of Japanese beech, the exposure to O 3 did not significantly affect N concentration in the leaves, suggesting that O 3 induces alterations in foliar N metabolism and also a reduction in the availability of N for photosynthesis in the leaves (Yamaguchi et al, 2007b).…”

“…Watanabe et al (2007) and Yamaguchi et al (2007b) reported that the exposure to O 3 reduced photosynthetic nitrogen use efficiency (PNUE) in the leaves of Q. serrata and Japanese beech. In the case of Japanese beech, the exposure to O 3 did not significantly affect N concentration in the leaves, suggesting that O 3 induces alterations in foliar N metabolism and also a reduction in the availability of N for photosynthesis in the leaves (Yamaguchi et al, 2007b). There is limited information on the effects of O 3 on N metabolism in the leaves or needles of Japanese forest tree species (Yamaguchi et al, , 2007aNakaji et al, 2004).…”

“…In the experimental studies of Watanabe et al (2008Watanabe et al ( , 2007Watanabe et al ( , 2006 and Yamaguchi et al (2010Yamaguchi et al ( , 2007b, seedlings of Q. serrata, Japanese beech, C. sieboldii, Japanese red pine, Japanese larch and Japanese cedar were grown in potted soil supplied with N as NH 4 NO 3 solution at 0, 20 and 50 kg ha -1 year -1 and simultaneously exposed to charcoal-filtered air or O 3 at 1.0, 1.5 and 2.0 times the ambient concentration for two growing seasons (24-h seasonal mean concentration of O 3 (from April to September) during the experimental period: 12, 43, 63 and 84 ppb, respectively). Watanabe et al (2008Watanabe et al ( , 2007Watanabe et al ( , 2006 reported the additive effects of O 3 and N load on growth of the seedlings of Q. serrata, C. sieboldii, Japanese red pine and Japanese cedar.…”

“…Watanabe et al (2008Watanabe et al ( , 2007Watanabe et al ( , 2006 reported the additive effects of O 3 and N load on growth of the seedlings of Q. serrata, C. sieboldii, Japanese red pine and Japanese cedar. On the other hand, significant interactive effects of O 3 and N load on growth were detected in Japanese larch and Japanese beech (Yamaguchi et al, 2007b;Watanabe et al, 2006). The relationships between relative whole-plant dry mass increment of Japanese larch or Japanese beech and daylight AOT40 of O 3 (accumulated exposure over a threshold of 40 ppb during daylight hours (global radiation¤50 W m -2 ), see Fig.…”

“…In Japan, relatively high concentrations of O 3 above 100 nL L -1 (ppb) have been frequently observed from spring to autumn in several mountainous areas Takeda and Aihara, 2007;Aihara et al, 2004;Maruta et al, 1999). Based on the results of the experimental studies and field surveys, it has been suggested that O 3 is an important environmental stress relating to the forest decline in Japan (Kume et al, 2009;Suto et al, 2008;Takeda and Aihara, 2007;Yamaguchi et al, 2007b;Kohno et al, 2005;Aihara et al, 2004;Yonekura et al, 2001a, b;Maruta et al, 1999).…”