Tomato stem, SEM

Tomato stem, SEM

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Caption: Tomato stem. Coloured scanning electron micrograph (SEM) of a cross-section through the stem of a tomato plant (Solanum lycopersicum). A stem is one of the main structural components of a vascular plant. The outer layer is the epidermis, with structural (ground) tissue below that. The semi-circular structure at the centre of the stem is a vascular bundle. Within this area, the larger tubes, the xylem, carry water, and the smaller tubes, the phloem, carry nutrients. On the surface of the stem are glandular hair-like structures called trichomes. The ones with rounded ends secrete distasteful chemicals to deter pests from feeding on the plant.

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Keywords: anatomical, biological, biology, botanical, botany, collenchyma, coloured, cross section, cross-section, epidermis, false-coloured, flora, glands, glandular, ground tissue, nature, no-one, nobody, parenchyma, phloem, physiological, plant, plant anatomy, plant physiology, scanning electron micrograph, scanning electron microscope, sclerenchyma, section, sectioned, sem, solanaceae, solanum lycopersicum, stem, tissue, tomato, trichome, trichomes, tubes, vascular bundle, vascular plant, xylem

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