title: Scaling the respiratory metabolism to phosphorus relationship in plant seedlings.
abstract: There are empirical indications of an isometric scaling relationship between plants' respiratory metabolism rates and nitrogen contents. To test the hypothesis that there may be a similar relationship between plants' respiratory metabolism and phosphorus contents we used data obtained from 150 laboratory and field-grown seedlings representing 30 herbaceous species and 20 woody deciduous species. Our results show that whole-plant respiration rates strongly scaled to the 0.81-power of the whole-plant phosphorus content, across wide ranges of growth conditions and functional classifications. Moreover, we also found a similar scaling exponent between whole-plant respiration rates and total nitrogen contents for the same set of samples. The similarities of the metabolic scaling relationships suggest that similar mechanisms may be involved in the transport and storage of phosphorus and nitrogen in plants.
authors.affiliation: MOE Key Laboratory for Bio-Resources and Eco-Environment, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China.
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China.
authors.forename: Heng
authors.initials: H
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China.
authors.forename: Jian-Ming
authors.initials: JM
authors.lastname: Deng
authors.affiliation: MOE Key Laboratory for Bio-Resources and Eco-Environment, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China.|State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China.
authors.forename: Jian-Quan
authors.initials: JQ
authors.lastname: Liu
mesh_terms: D008954:Models, Biological; D018521:Plant Physiological Phenomena; D010944:Plants / Q000378:metabolism*; D036226:Seedlings / Q000378:metabolism*