Three‐dimensional xylem networks and phyllode properties of co‐occurring Acacia
作者： Gerald FM Page , JIE Liu , Pauline F Grierson
DOI: 10.1111/J.1365-3040.2011.02411.X
关键词: Drought tolerance 、 Acacia ayersiana 、 Acacia 、 Terete 、 Leaf size 、 Acacia aneura 、 Range (biology) 、 Biology 、 Botany 、 Xylem
摘要: Reduced leaf size is often correlated to increased aridity, where smaller leaves demand less water via xylem conduits. However, it unknown if differences in three-dimensional (3D) connectivity reflect leaf-level adaptations. We used X-ray microtomography (micro-CT) quantify 3D ∼5 mm diameter branch sections of co-occurring semi-arid Acacia species varied phyllode size. compared minimum potential and two-dimensional (2D) vessel attributes derived from produced by micro-CT. 2D included area, density, number ratio (S) lumen fraction (F). Trees with terete phyllodes had negative potentials than broad variants. was conserved across all trees regardless type or potential. also found that sensitive (F) not the even though F consistent among Our results demonstrate anatomy, connectivity, likely explain diversity drought tolerance closely related species. Further analysis using our approach a broader range will improve understanding adaptations networks arid zone
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