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Plants and Man in Space

Plants and Man in Space. Plants and Man in Space: Why bring plants along and study them in space?. benefits in space life support benefits on Earth improvement of plant resources improve understanding of how gravity affects plants. O 2. food water. CO 2.

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Plants and Man in Space

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  1. Plants and Man in Space

  2. Plants and Man in Space: Why bring plants along and study them in space? • benefits in space • life support • benefits on Earth • improvement of plant resources • improve understanding of how gravity affects plants

  3. O2 food water CO2 Why bring plants along?:life support systems

  4. Why bring plants along ?: Benefits on Earth from plant studies in space

  5. Key Questions to be Answered • How does the gravity environment shape the way plants grow and reproduce? • How will the microgravity environment of space alter the way plants grow and reproduce?

  6. How does the gravity environment shape the way plants grow and reproduce? • It’s obvious on Earth that gravity directs the growth of shoots up and roots down. • When a plant is placed on its side, roots and shoots reorient.

  7. How does the gravity environment shape the way plants grow and reproduce? • It’s obvious on Earth that gravity directs the growth of shoots up and roots down. • When a plant is placed on its side, roots and shoots reorient. • All effects of gravity on growth and development might not be obvious on Earth.

  8. How will the microgravity environment of space alter the way plants grow and reproduce? • An obvious effect is disoriented growth of roots and shoots in space. • What are less obvious effects on development, reproduction, and metabolism?

  9. Examples of Studies in Space • Changes in root cells • Chromosome damage in cultured plant cells • Pollen and seed development

  10. Examples of Studies in Space • Changes in root cells • Chromosome damage in cultured plant cells • Pollen and seed development

  11. Examples of Studies in Space • Changes in root cells • Chromosome damage in cultured plant cells • Pollen and seed development

  12. Examples of Studies in Space • Changes in root cells • Chromosome damage in cultured plant cells • Pollen and seed development

  13. Examples of Space Related Plants Studies on Earth • Plant mutants • mucilage free corn root tips • low starch tobacco seedlings • Single cell systems • Chara algae cells • Ceratopteris fern spores

  14. root cap area of growth response The Root as an Experimental System in Gravity Research

  15. Examples of Space Related Plants Studies on Earth • Plant mutants • mucilage free corn root tips • low starch tobacco seedlings • Single cell systems • Chara algae cells • Ceratopteris fern spores

  16. Examples of Space Related Plants Studies on Earth • Plant mutants • mucilage free corn root tips • low starch tobacco seedlings • Single cell systems • Chara algae cells • Ceratopteris fern spores

  17. Examples of Space Related Plants Studies on Earth • Plant mutants • mucilage free corn root tips • low starch tobacco seedlings • Single cell systems • Chara algae cells • Ceratopteris fern spores

  18. v v Streaming in a Horizontal Cell streaming velocity (v): upper=lower

  19. V Streaming Rates are Related to Tension and Compression cell density>medium density cell density<medium density pull compress V V settling protoplasm buoyant protoplasm V compress pull Vdown>Vup Vdown<Vup

  20. Examples of Space Related Plants Studies on Earth • Plant mutants • mucilage free corn root tips • low starch tobacco seedlings • Single cell systems • Chara algae cells • Ceratopteris fern spores

  21. Germinating Ceratopteris Spores

  22. Gravity Response of Ceratopteris Induction of germination by light Polarity determination window nuclear migration mitosis spore coat splitting rhizoid growth

  23. Nuclear Migration in Ceratopteris Spores

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