Molecular mechanisms underlying leaf development, …
2022年4月20日 · Stem cells in the CZ provide undifferentiated cells that serve as founder cells. Subsequently, the founder cells differentiate into lateral organs, such as leaves, in the PZ (Figure 2A). Figure 2. Schematic model of development in shoot apical meristem and leaf primordia. A, Cytohistological zonation of the SAM.
Structure, Development, and Patterns of Primary, Secondary, and ...
2021年1月26日 · The vascular tissues that differentiate from the procambium are defined as primary vascular tissues. At nodes, where the auxin signal descending from young leaves merges, the local increased signal concentration promotes the differentiation of the first phloem elements, which is followed by xylem elements (arrowhead in Fig. 2.1 ).
Leaf Development and Vascular Differentiation | SpringerLink
2021年1月26日 · The hydathodes differentiate at the margin of leaf primordia in the sites of auxin maxima, which induce their unique vascular tissues (Aloni 2001; Aloni et al. 2003). The high-auxin concentration at the leaf’s tip induces the primary vein and its largest hydathode (Fig. 7.11A ).
Developmental timing in plants | Nature Communications
2024年3月27日 · At its tip, a microscopic translucent group of cells, the shoot apical meristem, produces leaf primordia on its flanks to a defined beat. Each leaf progresses through a series of stages. As...
Morphology of a simple leaf from Arabidopsis. Left: the mature rosette leaf displays serrations (SE) along the leaf margins and a petiole (PE) at the leaf base. Right: stipules (S) are generated beside young leaf primordia. Note that the leaf margins (green) of simple leaves are continuous.
Decoding the leaf apical meristem of Guarea glabra Vahl …
2024年3月2日 · This undifferentiated tissue, which was identified by smaller cell size, and richer in cytoplasm stained by Toluidin Blue O, than other tissues, was not clearly divided from the youngest LP.
Ectopic divisions in vascular and ground tissues of
2012年8月29日 · It is hypothesized that the vascular overproduction in auxin transport-inhibited wild-type leaves is limited by simultaneous differentiation of ground cells into mesophyll cells. Ectopic ground cell divisions may negate this effect by providing undifferentiated ground cells that respond to accumulated auxin by differentiation into vascular cells.
Auxin Is Required for Leaf Vein Pattern in Arabidopsis1
1999年12月1日 · Auxin is synthesized in leaf primordia, and under normal circumstances would be exported from the leaf through cells associated with the vascular tissue. The interruption of vascular tissue in the leaf petiole is thus likely to provide an anatomical block to auxin transport, on top of the biochemical block provided by the polar auxin transport ...
Molecular and Hormonal Regulation of Leaf Morphogenesis in …
2020年7月20日 · Therefore, it is important to unveil the molecular and hormonal regulation of leaf morphogenesis, including the initiation of leaf primordia, the determination of leaf axes, and the regulation of cell division in model plant Arabidopsis thaliana. The main focus of this review is to summarize the current knowledge and discuss the several ...
Specification of leaf dorsiventrality via a prepatterned ... - Nature
2022年3月22日 · The maintenance of adaxial–abaxial polarity within leaf primordia reflects the output of an intricate gene regulatory network in which mutually antagonistic interactions between transcription...