Topic 9.3 Growth in Plants

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Across
  1. 6. Second stage in primary growth where cells lengthen under influence of auxin (10)
  2. 9. Third stage of primary growth where cells become specialised in structure and function (15)
  3. 10. Undifferentiated plant tissue from which new cells are formed, allowing for growth (8)
  4. 12. Any of a class of related plant hormones act in concert with auxin to stimulate cell division and influence the pathway of differentiation (9)
  5. 13. The part of a stem where one or more leaves or flowers are attached (4)
  6. 16. ________________ growth A type of growth characteristic of plants, in which the organism continues to grow as long as it lives (13)
  7. 19. ____________ variation When somatic embryos derived from single cells are grown into mature plants, the plant's characteristics exhibit variability. Used to select desired traits (10)
  8. 20. Growing large numbers of new plants from meristem tissue taken from a sample plant using tissue culture (16)
  9. 21. specialised membrane proteins that use ATP to move auxins out of cells located closer to the light (5, 6, 5)
  10. 22. Mass of undifferentiated cells which forms in tissue culture when auxin and cytokinin proportions are equal (6)
  11. 23. Above ground parts of a plant consisting of stems, leaves and reproductive structures (5)
Down
  1. 1. _____________ meristem Embryonic plant tissue in the tips of roots and in the buds of shoots that supplies cells for the plant to grow in length (6)
  2. 2. A piece of tissue taken from a particular plant (which includes meristematic tissue) then sterilised in order to grow a callus in tissue culture micropropagation (7)
  3. 3. A growth response of a plant toward or away from a stimulus (7)
  4. 4. Indoleacetic acid (IAA), a natural plant hormone that has a variety of effects, including cell elongation, root formation, secondary growth, and fruit growth (5)
  5. 5. Growth of a plant shoot toward light (positive) or of the root away from light (negative) (12)
  6. 7. A segment of a plant stem between the points where leaves are attached (9)
  7. 8. A soluble gelatinous polysaccharide that is present in plant cell walls and aids in binding the cellulose microfibrils together (6)
  8. 11. A finger-like projection along the flank of a shoot apical meristem, from which a leaf arises (4, 10)
  9. 14. _________ growth Growth produced by apical meristems, which lengthen stems and roots. (7)
  10. 15. First stage in primary growth where new cells are generated in the apical meristems (4 8)
  11. 17. An insoluble polysaccharide that is present in plant cell walls and aids in binding the cellulose microfibrils together (13)
  12. 18. Plant proteins that break the cross-links (hydrogen bonds) between cellulose microfibrils and other cell wall constituents, loosening the walls fabric (9)