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. 2008 Jun 28;179(2):417–427. doi: 10.1111/j.1469-8137.2008.02476.x

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© The Authors (2008). Journal compilation © New Phytologist (2008)

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Simulations based on the balanced growth hypothesis. (a) Measured and calculated area‐based leaf nitrogen concentration (LNC_a) in simulations 1 and 2. Simulation 1 estimated the effect of specific leaf area (SLA) on LNC_a, and simulation 2 estimated the coupled effects of SLA and leaf : root ratio. Closed circles, measured LNC_a; open circles, calculated LNC_a in simulation 2. A broken line represents the result of simulation 1. A solid line represents the regression relationship between measured LNC_a and SLA, y = −0.016x + 2.14 (r ² = 0.42, P = 0.032). (b) Calculated LNC_a in simulation 3 that estimated the coupled effects of SLA and leaf nitrogen productivity (LNP). Open circles, calculated LNC_a in simulation 3. Other symbols and lines were as in (a). (c) Calculated LNC_a in simulation 4 that estimated the coupled effects of SLA and a. Open circles, calculated LNC_a in simulation 4. Other symbols and lines were as in (a). (d) Calculated LNC_a in simulation 5 that estimated the coupled effects of SLA and specific nitrogen absorption rate of roots (SAR). Open circles, calculated LNC_a in simulation 5. Other symbols and lines were as in (a).