2023年2月2日 · The leaf veins are small channels or capillaries that transport water and minerals to and from the leaf of a plant. They are vascular tissues composed of xylem and phloem cells embedded mainly in the parenchyma and sometimes sclerenchyma cells.

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.

Leaves can have many different shapes, sizes, textures and colors. The broad, flat leaves with complex venation of flowering plants are known as megaphylls and the species that bear them (the majority) as broad-leaved or megaphyllous plants, …

2013年4月18日 · 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.

2024年1月30日 · Leaf venation. Veins in leaves are arranged in different patterns and they are another characteristic that is very helpful in plant identification (Figure \(\PageIndex{7}\)). Pinnate leaf venation is the first to come to mind when we think about a typical leaf.

2024年11月23日 · Petioles, stipules, veins, and a midrib are all essential structures of a leaf. Within each leaf, the vascular tissue forms veins. The arrangement of veins in a leaf is called the venation pattern. Monocots and dicots differ in their patterns of venation.

The arrangement of veins and veinlets on the leaf blade or lamina is called venation. Internally, the vein contains vascular tissues. Conventionally venation is classified into two types namely, Reticulate venation and Parallel venation.

Broad-leaf species generally have a highly branched network while grass species have parallel veins (Figure 3.20). Veins consist typically of tightly packed xylem and phloem tissues surrounded by a parenchymatous or fibrous sheath.

2024年10月16日 · Leaf veins exhibit diverse patterns, including parallel, pinnate, palmate, and reticulate, each adapted to specific plant species and blade shapes. Together, these veins form an intricate network, enabling efficient resource distribution and contributing to the overall health and survival of plants.

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.