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20231222164156.0 |
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231222s2001 xx ||||| 00| ||eng c |
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|a pubmed24n0379.xml
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|a (DE-627)NLM113600771
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|a (NLM)11457911
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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 Colmer, T D
|e verfasserin
|4 aut
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| 245 |
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|a Evidence for down-regulation of ethanolic fermentation and K+ effluxes in the coleoptile of rice seedlings during prolonged anoxia
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|c 2001
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| 336 |
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|a Text
|b txt
|2 rdacontent
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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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|a Date Completed 04.10.2001
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|a Date Revised 13.05.2019
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|a published: Print
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|a Citation Status MEDLINE
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|a Ethanolic fermentation, the predominant catabolic pathway in anoxia-tolerant rice coleoptiles, was manipulated in excised and 'aged' tissues via glucose feeding. Coleoptiles with exogenous glucose survived 60 h of anoxia, as evidenced by vigorous rates of K+ and phosphate net uptake and growth of roots and shoots when re-aerated. In contrast, coleoptiles without exogenous glucose showed net losses of K+ and phosphates starting 12 h after anoxia was imposed and these did not recover fully when re-aerated after 60 h of anoxia. Ethanol production (micromol x g(-1) FW x h(-1)) declined from about 7.5 during the first 12 h of anoxia to 5 or 2.2 after 48-60 h, in coleoptiles with or without exogenous glucose, respectively. Carbohydrate concentrations changed only slightly in anoxic coleoptiles with exogenous glucose due to net glucose uptake at 2.6 micromol x g(-1) FW x h(-1). Ethanolic fermentation, and therefore ATP production, may have been down-regulated after an initial period of acclimation to anoxia in coleoptiles with exogenous glucose. Maintenance requirements for energy were assessed to be 3.4-7.6-fold lower in these anoxic coleoptiles than published estimates for non-growing aerated leaf tissues. A modest part of the required economy in energy consumption would have been derived from diminished ion transport; anoxia reduced K+ and phosphate net uptake by 70-90% in these coleoptiles. K+ efflux was 10-fold lower in anoxic than in aerated coleoptiles with exogenous glucose. Using the unidirectional efflux equation, the membrane permeability to K+ was estimated to be 17-fold lower in anoxic than in aerated coleoptiles, presumably due to predominantly closed K+ channels
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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|a Phosphates
|2 NLM
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| 650 |
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7 |
|a Ethanol
|2 NLM
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| 650 |
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7 |
|a 3K9958V90M
|2 NLM
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| 650 |
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|a Adenosine Triphosphate
|2 NLM
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| 650 |
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|a 8L70Q75FXE
|2 NLM
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| 650 |
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|a Glucose
|2 NLM
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| 650 |
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7 |
|a IY9XDZ35W2
|2 NLM
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| 650 |
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7 |
|a Potassium
|2 NLM
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| 650 |
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7 |
|a RWP5GA015D
|2 NLM
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| 650 |
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7 |
|a Oxygen
|2 NLM
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| 650 |
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|a S88TT14065
|2 NLM
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| 700 |
1 |
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|a Huang, S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Greenway, H
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 52(2001), 360 vom: 16. Juli, Seite 1507-17
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
1 |
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|g volume:52
|g year:2001
|g number:360
|g day:16
|g month:07
|g pages:1507-17
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_NLM
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|a GBV_ILN_350
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|a AR
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| 952 |
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|d 52
|j 2001
|e 360
|b 16
|c 07
|h 1507-17
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