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4. Phloem I 5. Sclerenchyma 6. Cortex 7. Epidermis. 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]
[3] [4] It is also found in the Mount Ngọc Lum Heo and Mount Ngọc Am areas of Quảng Nam Province. Its habitat is areas under jungle leaf canopy or near running water, at altitudes above 1,200 metres (4,000 ft). [3] The species is also reported from central and southern provinces of China. [2]
[2] [5] The Casparian strip is a band of hydrophobic, corky-like tissue that is found on the outside of the endodermis and the exodermis. Its main function is to prevent solution backflow into the cortex and to maintain root pressure. [6] It is also involved in ensuring that soil is not pulled directly into the root system during nutrient ...
Parenchyma is a versatile ground tissue that generally constitutes the "filler" tissue in soft parts of plants. It forms, among other things, the cortex (outer region) and pith (central region) of stems, the cortex of roots, the mesophyll of leaves, the pulp of fruits, and the endosperm of seeds.
The cross-section of a barley root. Root morphology is divided into four zones: the root cap, the apical meristem, the elongation zone, and the hair. [4] The root cap of new roots helps the root penetrate the soil. These root caps are sloughed off as the root goes deeper creating a slimy surface that provides lubrication.
Root hair cells improve plant water absorption by increasing root surface area to volume ratio which allows the root hair cell to take in more water. The large vacuole inside root hair cells makes this intake much more efficient. Root hairs are also important for nutrient uptake as they are main interface between plants and mycorrhizal fungi.
Most words are created by either compounding or reduplicative derivation. Affixation is a relatively minor derivational process. Older styles of Vietnamese writing wrote polysyllabic words with hyphens separating the syllables, as in cào-cào "grasshopper", sinh-vật-học "biology", or cà-phê "coffee".
In addition, the territorial forces of MR-4 totaled about 200,000, by far the most numerous among the four military regions. The 7th Division was headquartered at Đồng Tâm Base Camp in Dinh Tuong Province ; the 9th Division was located in Sa Đéc and the 21st Division usually operated in the Cà Mau Peninsula from its headquarters at Bạc ...