High nitrogen and elevated [CO2] effects on the growth, defense and photosynthetic performance of two eucalypt species.
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.
Research Institute of Fiber Technology for Plantation Forest, FORDA, Ministry of Forestry, Kotak Pos 4/BKN, Bangkinang 28401, Riau, Indonesia. kee_november09@yahoo.com
Eka
E
Novriyanti
Makoto
M
Watanabe
Mitsutoshi
M
Kitao
Hajime
H
Utsugi
Akira
A
Uemura
Takayoshi
T
Koike
D000393:Air Pollutants / Q000378:metabolism / Q000633:toxicity*; D002245:Carbon Dioxide / Q000378:metabolism / Q000633:toxicity*; D005052:Eucalyptus / Q000187:drug effects / Q000502:physiology*; D009584:Nitrogen / Q000378:metabolism / Q000633:toxicity*; D010788:Photosynthesis / Q000187:drug effects*
D000393:Air Pollutants; D002245:Carbon Dioxide; D009584:Nitrogen