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Cross-section of a monocot root. Note the lack of any pattern in the arrangement of the vascular bundles. For the background to this list, see List of the vascular plants of Britain and Ireland .
Allium crenulatum (Asparagales), an onion, with typical monocot perianth and parallel leaf venation Onion slice: the cross-sectional view shows the veins that run in parallel along the length of the bulb and stem. The monocots have, as the name implies, a single (mono-) cotyledon, or embryonic leaf, in their seeds.
The following description is for early events in lateral root formation of the model organism Arabidopsis thaliana: Lateral root formation is initiated in pericycle (located between the endodermis and vascular tissue) of the root system, and begins with a process referred to as priming. In this stage, you have rhythmic bouts of gene expression ...
Cross-section of a flax plant stem: 1. Pith 2. Protoxylem 3. Xylem I 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 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. [5] 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.
The coleorhiza or root sheath is a protective layer of tissue that surrounds the radicle (the embryonic primary root) in monocotyledon seeds. [1] During germination, the coleorhiza is the first part to grow out of the seed, growing through cell elongation.
F bicollateral open Cross section of celery stalk, showing vascular bundles, which includes both phloem and xylem Detail of vascular bundle: closed, collateral vascular bundles of the stem axis of Zea mays Vascular bundle in the leaf of Metasequoia glyptostroboides The vascular bundle of pine leaf showing xylem and phloem
Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as grasses in which few leaf primordia and shoot apex of monocot embryo remain enclosed. The coleoptile protects the first leaf as well as the growing stem in seedlings and eventually, allows the first leaf to emerge. [1]