Hachi's posts

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Ground tissue of stems = parenchyma cells, reinforced by collenchyma (during primary growth) and sclerenchyma (fiber cells)

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Eudicots - ring of vascular bundles in stem - xylem next to pith, phloem next to cortex

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Near soil surface - bundled vasculature of stem converges w/ vascular cylinder of root

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Intercalary meristems - in monocots, meristem at base of stems/leaves

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Disrupt chemical communication → axillary buds give rise to lateral shoot

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Apical dominance - a nearby active apical bud inhibits growth of axillary buds

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Shoot elongation is due to lengthening of internode cells below the shoot tip

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Leaf primordia - projections along sides of shoot apical meristem → leaves

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Pericycle - outer layer of vascular cylinder → meristem gives rise to lateral roots

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Endodermis - inner layer of cortex, regulates passage of substances into vascular cylinder

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Stores carbs, transports water/salts from root hairs to center of root, diffusion

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Ground tissue of roots = parenchyma cells in the cortex (between vascular cylinder and epidermis)

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Monocot steles - core of unspecialized parenchyma cells, surrounded by alternating xylem/phloem

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Eudicot steles - star shape (xylem) surrounded by phloem