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Mannitol can mitigate negative effects of simulated acid mist and fluoranthene in juvenile Japanese red pine (P. densiflora Sieb. et Zucc.)
2013
Oguntimehin, Ilemobayo | Bandai, Sayuri | Sakugawa, Hiroshi
The negative health effects of simulated acid mists and fluoranthene on juvenile Japanese red pine were investigated, and the methods of protection from these pollutants were examined. The needle gas exchange, chlorophyll fluorescence, chemical contents and visual damage to needles caused by acid mist applied alone or its conjunction with fluoranthene were investigated over 60 d and 20 d, respectively. Acid mist at pH 2 and 3 caused physiological and visual damage, which was enhanced by the addition of fluoranthene to the mist. However, fluoranthene and acid mist at pH 4 and 5 showed only minor effects. These findings indicate that acid mist may be more harmful to pine trees if it occurs in conjunction with polycyclic aromatic hydrocarbons. Moreover, suppression of the singular and additive effects of these compounds was achieved using mannitol, which may be widely applicable to suppression of reactive oxygen species-mediated plant damage.
显示更多 [+] 显示较少 [-]Relating Tree Ring Chemistry of Pinus densiflora to Precipitation Acidity in an Industrial Area of South Korea
2009
Kwak, Jin-Hyeob | Im, Sang-sŏn | Park, Hyun Jung | Lee, Sun-Il | Lee, Kye-Han | Kim, Han-yŏng | Chang, Scott X. | Lee, Sang-Mo | Ro, Hee-Myong | Choi, Woo-Jung
To test the possible use of tree ring chemical properties as proxies for precipitation acidity ([H⁺]), we investigated the relationships between tree ring chemistry (δ¹³C, δ¹⁵N, Ca-to-Al ratio, and N concentration) of Pinus densiflora and precipitation [H⁺] between 1992 and 2005 in an industrial area in the southwest region of South Korea. Statistical analyses showed that all tree ring chemistry parameters were significantly correlated with precipitation [H⁺]. Tree ring δ¹³C was negatively correlated with precipitation acidity (r = -0.67, P < 0.01), reflecting the photosynthetic fixation of ¹³C-depleted CO₂ from fossil fuel combustion that would be the primary source of precipitation acidity. A positive correlation of N concentration (r = 0.89, P < 0.001) and a negative correlation of δ¹⁵N (r = -0.63, P < 0.05) in tree rings with precipitation acidity most likely reflected the influence of ¹⁵N-depleted N compounds deposited via precipitation. The Ca-to-Al ratio was negatively (r = -0.58, P < 0.05) correlated with precipitation acidity, indicating that soil acidification caused the loss of Ca from the soil and solubilization of Al resulting from acid precipitation. Such relationships suggest that δ¹³C, δ¹⁵N, N concentration, and Ca-to-Al ratio in tree rings can be reliably used to evaluate the impact of acid precipitation on the studied P. densiflora stands.
显示更多 [+] 显示较少 [-]Effects of simulated acid rain on Pinus densiflora: inhibition of net photosynthesis by the pheophytization of chlorophyll
1998
Shan, Y. (Chinese Academy of Sciences, Beijing (China). Research Center for Eco-Environmental Sciences)
Investigation on fluorine and heavy metals in the annual rings of trees
1981
Ogihara, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Seki, H. | Katsuno, T. | Nagase, K.
Evaluation by AOT40 method on the effects of ozone on forest tree species
2004
Satsumabayashi, H.(Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Uchida, H. | Sasai, H. | Nomizo, H. | Kawamura, M. | Hutaki, K.