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rye

rye. A young root –the first organ to emerge during seed germination---WHY?. Adventitious roots. root hairs. Slimy layer. Root apical meristem. rootcap. Root tip. epidermis. cortex. endodermis. Vascular cylinder. stele. Cross section of primary root. epidermis. cortex. endodermis.

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rye

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  1. rye

  2. A young root –the first organ to emerge during seed germination---WHY?

  3. Adventitious roots

  4. root hairs Slimy layer Root apical meristem rootcap Root tip

  5. epidermis cortex endodermis Vascular cylinder stele Cross section of primary root

  6. epidermis cortex endodermis Vascular cylinder stele Cross section of primary root

  7. pericycle Primary xylem Primary phloem xylem Cross section of primary root

  8. Stele: A = xylem B = phloem C = endodermis D = pericycle Dicot root cross section

  9. Zea sp. root cross section

  10. storage

  11. Pneumatophores -- for breathing in waterlogged soil

  12. Contractile roots --thickened specialized roots at the base of a corm, bulb, or other organ which is designed to shrink vertically under conditions of seasonaldrought  that helps position this plant part at an appropriate level in the ground.

  13. Haustoria – suckers of parasitic plants for obtaining nutrients from their hosts

  14. Mycorrhizae –mutualistic relationship between plant roots and fungi Pinus strobus with Amanita muscaria

  15. Root nodules --–mutualistic relationship between plant roots and N-fixing bacteria

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