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231222s1997 xx ||||| 00| ||eng c |
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|a pubmed25n0382.xml
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|a (DE-627)NLM114389667
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|a (NLM)11541075
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Kuznetsov, O A
|e verfasserin
|4 aut
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| 245 |
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|a Magnetophoretic induction of curvature in coleoptiles and hypocotyls
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| 264 |
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|c 1997
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 11.10.1998
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| 500 |
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|a Date Revised 07.12.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a Coleoptiles of barley (Hordeum vulgare) were positioned in a high gradient magnetic field (HGMF, dynamic factor gradient of H(2)/2 of 10(9)-10(10) Oe2 cm-1), generated by a ferromagnetic wedge in a uniform magnetic field and rotated on a 1 rpm clinostat. After 4 h 90% of coleoptiles had curved toward the HGMF. The cells affected by HGMF showed clear intracellular displacement of amyloplasts. Coleoptiles in a magnetic field next to a non-ferromagnetic wedge showed no preferential curvature. The small size of the area of nonuniformity of the HGMF allowed mapping of the sensitivity of the coleoptiles by varying the initial position of the wedge relative to the coleoptile apex. When the ferromagnetic wedge was placed 1 mm below the coleoptile tip only 58% of the coleoptiles curved toward the wedge indicating that the cells most sensitive to intracellular displacement of amyloplasts and thus gravity sensing are confined to the top 1 mm portion of barley coleoptiles. Similar experiments with tomato hypocotyls (Lycopersicum esculentum) also resulted in curvature toward the HGMF. The data strongly support the amyloplast-based gravity-sensing system in higher plants and the usefulness of HGMF to substitute gravity in shoots
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| 650 |
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|a Journal Article
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| 650 |
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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|a NASA Discipline Plant Biology
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| 650 |
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|a Non-NASA Center
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| 700 |
1 |
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|a Hasenstein, K H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hasenstein, K H
|e investigator
|4 oth
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| 773 |
0 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 48(1997), 316 vom: 18. Nov., Seite 1951-7
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnas
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| 773 |
1 |
8 |
|g volume:48
|g year:1997
|g number:316
|g day:18
|g month:11
|g pages:1951-7
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|a GBV_USEFLAG_A
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| 912 |
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|a GBV_NLM
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|a GBV_ILN_350
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| 951 |
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|a AR
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| 952 |
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|d 48
|j 1997
|e 316
|b 18
|c 11
|h 1951-7
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