In botany, a cortex is an outer layer of a stem or root in a vascular plant, lying below the epidermis but outside of the vascular bundles. [1] The cortex is composed mostly of large thin-walled parenchyma cells of the ground tissue system and shows little to no structural differentiation. [ 2 ]

Cortex, in plants, tissue of unspecialized cells lying between the epidermis (surface cells) and the vascular, or conducting, tissues of stems and roots. Cortical cells may contain stored carbohydrates or other substances such as resins, latex, essential oils, and tannins.

2022年9月13日 · These NPA-induced spatial changes in the auxin response point to the existence of centripetal auxin flow and support the pivotal role of auxin in inducing cortical cell division. In plants, the correct orientation of cell division is essential for proper embryogenesis and post-embryonic development by determining cell and tissue patterning and ...

Usually some of the cortical cells or all of them contain chloro­plasts at least in young stems. The cortical cells also contain starch, tannins, crystals and other com­mon secretions in them. The cortex may contain collenchyma, sclerenchyma and sclereids in ad­dition to ordinary parenchyma.

Plants possess two cytoskeletal systems shared by all eukaryotes, that is, the actin filament and microtubule networks, with a host of associated and regulatory proteins. Cytoskeletal networks in the cell cortex are crucial for the controlled remodeling of the plant cell wall, contributing thus substantially to cell growth and morphogenesis.

2007年10月1日 · Plant cell division is spatially organized to maintain a critical cell volume and to control growth directionality. The correct orientation of the separating cell wall is secured by means of specialized cytoskeletal structures that guide the newly formed cell plate toward a predefined cortical position.

The tissue of unspecialized cells in plants is called the cortex, it lies between the epidermis (surface cells) and the vascular or conducting tissues of roots and stems. Whereas, cortical cells may contain stored carbohydrates or other substances like …

Plant cell division is spatially organized to maintain a critical cell volume and to control growth directionality. The correct orientation of the separating cell wall is secured by means of specialized cytoskeletal structures that guide the newly formed cell plate toward a predefined cortical position.

2023年2月8日 · In plant cells, the new cell wall is built in the middle of the cell by vesicles trafficked along an antiparallel microtubule and a microfilament array called the phragmoplast. The phragmoplast expands toward a specific location at the cell cortex called the division site, but how it accurately reaches the division site is unclear.

2023年6月29日 · Increasing evidence has revealed that mechanical stresses markedly influence the alignment of cortical microtubules (CMTs) in plant cells, among other effects. CMTs are able to reorient in response to mechanical stresses at both the single-cell and tissue levels and always align with the maximal tensile stress direction.