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. 2009 Jan 26;106(6):1853–1856. doi: 10.1073/pnas.0808434106

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© 2009 by The National Academy of Sciences of the USA

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Fig. 3. — Nitrogen allocation to photosynthesis and cell walls versus leaf mass per area (LMA). (A) The proportion of leaf nitrogen in photosynthesis (N_P/N_L) against LMA (P < 0.020, r = −0.593). (B) Cell wall protein content (P_CW) against LMA (P < 0.014, r = 0.616). (C) The ratio of cell wall proteins to total leaf proteins (P_CW/P_L) against LMA (P < 0.004, r = 0.698). (D) The proportion of leaf nitrogen in cell walls (N_CW/N_L) against LMA (P = 0.001, r = 0.744). Mean values (n = 5) are given for populations of Ageratina adenophora originating from invasive (China, closed circles and India, closed triangles) and native (Mexico, open circles) ranges.