Plant Phys 2

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Across
  1. 2. The directional growth of a plant toward or away from light, usually toward it.
  2. 3. A plant hormone that promotes stem elongation, seed germination, and flowering.
  3. 4. A structure that connects the developing plant embryo to the surrounding tissue and helps transfer nutrients during early development.
  4. 9. Growth and development in darkness, resulting in etiolated seedlings.
  5. 12. An enzyme that activates or deactivates other proteins by transferring phosphate groups to them.
  6. 17. A family of growth-repressing proteins that inhibit gibberellin signaling; their degradation allows growth to proceed.
  7. 18. The light-absorbing part of a pigment or photoreceptor molecule that initiates a response when exposed to light.
  8. 19. A small opening in the ovule that allows entry of the pollen tube for fertilization.
  9. 23. Auxin efflux transporter
  10. 25. The ability of a single plant cell to develop into a complete organism.
  11. 27. The arrangement or pattern of leaves on a stem or branch.
  12. 29. A protein complex that degrades and recycles proteins tagged for destruction.
  13. 31. Extreme drying or loss of moisture; many seeds are desiccation-tolerant to survive until conditions improve.
  14. 34. A condition in which a molecule can switch between two forms when exposed to different wavelengths of light.
Down
  1. 1. A red/far-red light receptor protein in plants that regulates growth responses such as seed germination and shade avoidance.
  2. 5. A blue-light receptor that mediates phototropism and light-induced opening of stomata.
  3. 6. One of two specialized cells that flank the egg cell
  4. 7. The biological process that controls the shape and structure of tissues, organs, or an entire organism.
  5. 8. Biosynthesis pathway of ABA and Gibberellins
  6. 10. The female reproductive organ of a flower, made up of the stigma, style, and ovary.
  7. 11. The diploid stage in the plant life cycle that produces spores through meiosis.
  8. 13. The process of weakening or breaking a seed coat to promote germination.
  9. 14. The protective cell layers surrounding the ovule, which later develop into the seed coat.
  10. 15. The male reproductive organ of a flower, composed of the anther and filament.
  11. 16. A flowering plant that has one cotyledon in its seed
  12. 20. Describes a plant grown in darkness
  13. 21. When seeds germinate while still attached to the parent plant.
  14. 22. The larger of two types of plant spores; develops into a female gametophyte.
  15. 23. An early, undeveloped structure that will give rise to an organ such as a leaf or flower.
  16. 24. Growth and development of plants in response to light signals, leading to normal morphology
  17. 26. A blue-light receptor that helps regulate circadian rhythms and inhibition of stem elongation.
  18. 28. The first “seed leaf” in the embryo of a plant that often stores or absorbs nutrients for germination.
  19. 30. cell One of three cells at the opposite end of the embryo sac from the egg
  20. 32. A small regulatory protein that tags other proteins for degradation by the proteasome.
  21. 33. The stem-like region of a seedling between the cotyledons and the root.