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Updated: May 20, 2026

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
Published on: November 21, 2015
High nitrogen and elevated [CO2] effects on the growth, defense and photosynthetic performance of two eucalypt
Eka Novriyanti1, Makoto Watanabe, Mitsutoshi Kitao
1Research Institute of Fiber Technology for Plantation Forest, FORDA, Ministry of Forestry, Kotak Pos 4/BKN, Bangkinang 28401, Riau, Indonesia. kee_november09@yahoo.com
Abstract:
Atmospheric nitrogen deposition and [CO(2)] are increasing and represent environmental problems. Planting fast-growing species is prospering to moderate these environmental impacts by fixing CO(2). Therefore, we examined the responses of growth, photosynthesis, and defense chemical in leaves of Eucalyptus urophylla (U) and the hybrid of E. deglupta × E. camadulensis (H) to different CO(2) and nitrogen levels. High nitrogen load significantly increased plant growth, leaf N, net photosynthetic rate (A(growth)), and photosynthetic water use efficiency (WUE). High CO(2) significantly increased A(growth), photosynthetic nitrogen use efficiency (PNUE) and WUE. Secondary metabolite (SM, i.e. total phenolics and condensed tannin) was specifically altered; as SM of U increased by high N load but not by elevated [CO(2)], and vice versa for SM of H.
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