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Leaf veins are vascular bundles coming to the leaf from stem. The arrangement of veins in a leaf is called the venation pattern. Frequently, there is one or more main vein (primary vein) and secondary veins that branch from it.
18 kwi 2013 · The leaf vein features responsible for water, nutrient, and sugar transport, and biomechanical support and protection are optimized according to several similar principles, and tightly coordinated in their genetic and developmental basis, and their evolution.
Describe the microscope internal structure of leaves, including the epidermis, mesophyll, and vascular bundles. Compare the adaptations of mesophytic, hydrophytic, and xerophytic leaves. Identify the unique features of pine and corn leaves. Compare the structures of sun and shade leaves.
1 maj 2001 · One basic function of leaf venation is represented by its contribution to the mechanical behaviour of a leaf. Venation geometry and density influences mechanical stability and may affect, for example, susceptibility to herbivory.
We synthesize classical concepts and the recent literature on a wide range of aspects of leaf venation. We describe 10 major structural features that contribute to multiple key functions, and scale up to leaf and plant performance.
Leaves are shoot structures that attach to stems and branches at nodes. Leaves are made up of cells that usually contain a high concentration of chloroplasts (cell organelles unique to plants) and are specialized sites for photosynthesis.
