2017年9月6日 · In the present study, we dissected leaf laminae from the midvein to perform metabolite profiling. The laminae mesophyll cells are the source of nutrients, and in C 3 plants they contain Rubisco as the most important nitrogen storage pool.

2018年8月14日 · In eudicot leaves, several size orders of veins branch from the centralized, larger midvein, forming an anastomosed net-like structure whose outline mirrors the overall shape of the leaf (Fig. 4a) (Cheadle et al., 1953; Kang & Dengler, 2002; Linh et al., 2018). Lateral veins connect to the midvein to form closed-ended loops.

2018年11月6日 · We investigated whether the arrangement of lateral secondary veins along primary midveins adhered to a species-specific pattern that resembled an alternate or opposite phyllotaxis.

Most grasses initiate the midvein and the secondary vasculature from the disk of leaf insertion and not from the existing stem provasculature. The midvein elongates acropetally toward the leaf tip. Only after the commencement of acropetal growth does the midvein also commence development toward the stem vascular strand, forming the leaf trace.

2001年2月1日 · After formation of the midvein, procambial strands arise as parallel stripes either within the zone of leaf attachment or within the leaf blade itself. Large lateral veins eventually extend basipetally to connect with the stem vasculature, whereas the smaller veins eventually connect with each other at the base and apex of the leaf blade.

2023年6月1日 · In rounded leaves like those of Arabidopsis, the vein network is composed of a central midvein that runs the length of the leaf, lateral veins that branch off the midvein and connect to distal veins to form loops, and a web of minor veins that branch off midvein and loops and either end freely in the leaf or connect to other veins on both ends ...

Other articles where midrib is discussed: angiosperm: Leaves: …to form the midvein, or midrib. The smaller lateral veins of the leaf are initiated near the leaf tip; subsequent major lateral veins are initiated sequentially toward the base, following the overall pattern of leaf development.

The midvein elongates acropetally toward the leaf tip. Only after the commencement of acropetal growth does the midvein also commence development toward the stem vascular strand, forming the leaf trace. Large longitudinal veins parallel to the midvein also form in this manner, arising from the disk of leaf Dicot leaf A: midvein B: secondary vein

2021年1月26日 · The hydathodes of the midvein and the secondary veins are induced by dynamic downward developmental patterns of auxin maxima at the leaf periphery; whereas tertiary veins and freely-ending veinlets are induced in the lamina at a later developmental stage by minor low-auxin synthesis sites, after the cessation of the inhibiting auxin maxima ...

Wild-type (WT) Arabidopsis forms broad leaves whose vein networks are defined by at least four reproducible features: (i) a narrow I-shaped midvein that runs the length of the leaf; (ii) lateral veins that branch from the midvein and join distal veins to form closed loops; (iii) minor veins that branch from midvein and loops and either end ...