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  • Title: Possible link between photosynthesis and leaf modulus of elasticity among vascular plants: a new player in leaf traits relationships?
    Author: Nadal M, Flexas J, Gulías J.
    Journal: Ecol Lett; 2018 Sep; 21(9):1372-1379. PubMed ID: 30027556.
    Abstract:
    A compromise between carbon assimilation and structure investment at the leaf level is broadly accepted, yet the relationship between net assimilation per area (An ) and leaf mass per area has been elusive. We propose bulk modulus of elasticity (ε) as a suitable parameter to reflect both leaf structure and function, and an inverse relationship between ε and An and mesophyll conductance (gm ) is postulated. Using data for An , gm and ε from previous studies and new measurements on a set of 20 species covering all major growth forms, a negative relationship between An or gm and ε was observed. High ε was also related to low leaf capacitance and higher diffusive limitations to photosynthesis. In conclusion, ε emerges as a key trait linked with photosynthetic capacity across vascular plants, and its relationship with gm suggests the existence of a common mechanistic basis, probably involving a key role of cell walls.
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