Optimization of moisture content for wheat seedling germination in a cellulose acetate medium for a space flight experiment
The Porous Tube Plant Nutrient Delivery System (PTPNDS), a hydrophilic, microporous ceramic tube hydroponic system designed for microgravity, will be tested in a middeck locker of the Space Shuttle. The flight experiment will focus on hardware operation and assess its ability to support seed germination and early seedling growth in microgravity. The water controlling system of the PTPNDS hardware has been successfully tested during the parabolic flight of the KC-135. One challenge to the development of the space flight experiment was to devise a method of holding seeds to the cylindrical porous tube. The seed-holder must provide water and air to the seed, absorb water from the porous tube, withstand sterilization, provide a clear path for shoots and roots to emerge, and be composed of flight qualified materials. In preparation for the flight experiment, a wheat seed-holder has been designed that utilizes a cellulose acetate plug to facilitate imbibition and to hold the wheat seeds in contact with the porous tube in the correct orientation during the vibration of launch and the microgravity environment of orbit. Germination and growth studies with wheat at a range of temperatures showed that optimal moisture was 78% (by weight) in the cellulose acetate seed holders. These and other design considerations are discussed.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
1996 |
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| Erschienen: |
1996 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:18 |
|---|---|
| Enthalten in: |
Advances in space research : the official journal of the Committee on Space Research (COSPAR) - 18(1996), 4-5 vom: 01., Seite 239-42 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Johnson, C F [VerfasserIn] |
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| Themen: |
059QF0KO0R |
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| Anmerkungen: |
Date Completed 21.08.1996 Date Revised 15.09.2019 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM114365970 |
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| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
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| 100 | 1 | |a Johnson, C F |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Optimization of moisture content for wheat seedling germination in a cellulose acetate medium for a space flight experiment |
| 264 | 1 | |c 1996 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a Date Completed 21.08.1996 | ||
| 500 | |a Date Revised 15.09.2019 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The Porous Tube Plant Nutrient Delivery System (PTPNDS), a hydrophilic, microporous ceramic tube hydroponic system designed for microgravity, will be tested in a middeck locker of the Space Shuttle. The flight experiment will focus on hardware operation and assess its ability to support seed germination and early seedling growth in microgravity. The water controlling system of the PTPNDS hardware has been successfully tested during the parabolic flight of the KC-135. One challenge to the development of the space flight experiment was to devise a method of holding seeds to the cylindrical porous tube. The seed-holder must provide water and air to the seed, absorb water from the porous tube, withstand sterilization, provide a clear path for shoots and roots to emerge, and be composed of flight qualified materials. In preparation for the flight experiment, a wheat seed-holder has been designed that utilizes a cellulose acetate plug to facilitate imbibition and to hold the wheat seeds in contact with the porous tube in the correct orientation during the vibration of launch and the microgravity environment of orbit. Germination and growth studies with wheat at a range of temperatures showed that optimal moisture was 78% (by weight) in the cellulose acetate seed holders. These and other design considerations are discussed | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a NASA Center KSC | |
| 650 | 4 | |a NASA Discipline Life Support Systems | |
| 650 | 4 | |a NASA Discipline Number 61-20 | |
| 650 | 4 | |a NASA Program CELSS | |
| 650 | 7 | |a Culture Media |2 NLM | |
| 650 | 7 | |a Water |2 NLM | |
| 650 | 7 | |a 059QF0KO0R |2 NLM | |
| 650 | 7 | |a acetylcellulose |2 NLM | |
| 650 | 7 | |a 3J2P07GVB6 |2 NLM | |
| 650 | 7 | |a Cellulose |2 NLM | |
| 650 | 7 | |a 9004-34-6 |2 NLM | |
| 700 | 1 | |a Dreschel, T W |e verfasserin |4 aut | |
| 700 | 1 | |a Brown, C S |e verfasserin |4 aut | |
| 700 | 1 | |a Wheeler, R M |e verfasserin |4 aut | |
| 700 | 1 | |a Brown, C S |e investigator |4 oth | |
| 700 | 1 | |a Wheeler, R M |e investigator |4 oth | |
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