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Kunzli, N., Mudway, I. S., Gotschi, T., Shi, T. M., Kelly, F. J., Cook, S., et al. (2006). Comparison of oxidative properties, light absorbance, and total and elemental mass concentration of ambient PM2.5 collected at 20 European sites. Environmental Health Perspectives, 114, 684-690. doi:10.1289/ehp.8584

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• TITLE: Traffic Pollution Influences Leaf Biochemistries of Broussonetia papyrifera

  AUTHORS: Yuanwen Kuang, Dan Xi, Jiong Li, Xiaomin Zhu, Lingling Zhang

  KEYWORDS: Amino Acids; Broussonetia papyrifera; Carbohydrates; Phytohormounes; Traffic Pollutants

  JOURNAL NAME: Open Journal of Forestry, Vol.2 No.2, April 13, 2012

  ABSTRACT: Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly growing under two traffic densities (a high traffic loads bearing more than 1000 vehicles per hour, HT; and a relatively clear section with almost no traffic loads, NT) were collected for carbohydrates, amino acids and phytohormones analysis. Leaves exposed to traffic pollutants were revealed to have significant lower amounts of carbohydrates and total amino acids than those growing at relatively clear environment. The levels of abscisic acid in the leaves significantly increased, while gib-berellin acid, indoleaetic acid, and zeatin riboside in the leaves significantly decreased, with the traffic densities. The results indicated that the contents of carbohydrates, amino acids and phytohormones in the leaves of B. papyrifera could be adversely affected by traffic pollution. Variations of the leaf biochemistries of B. papyrifera exposed to traffic pollutants implied that B. papyrifera could physiologically regulate itself to adapt or resist traffic stress.