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Truncated Hemoglobi...
Truncated Hemoglobins in Actinorhizal Nodules of Datisca glomerata.
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- Pawlowski, Katharina (författare)
- Stockholms universitet,Botaniska institutionen
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Jacobsen, Karin (författare)
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Alloisio, Nicole (författare)
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Ford Denison, R Ford (författare)
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Klein, M (författare)
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Tjepkema, John D (författare)
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Winzer, Thilo (författare)
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Sirrenberg, A (författare)
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Guan, Changhui (författare)
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Berry, Alison M (författare)
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(creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Plant Biol (Stuttg). - 1435-8603. ; 9:6, s. 776-785
- Relaterad länk:
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http://www.ncbi.nlm....
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https://urn.kb.se/re...
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Abstract
Ämnesord
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- Three types of hemoglobins exist in higher plants, symbiotic, non-symbiotic, and truncated hemoglobins. Symbiotic (class II) hemoglobins play a role in oxygen supply to intracellular nitrogen-fixing symbionts in legume root nodules, and in one case (Parasponia sp.), a non-symbiotic (class I) hemoglobin has been recruited for this function. Here we report the induction of a host gene, Dgtrhb1, encoding a truncated hemoglobin in Frankia-induced nodules of the actinorhizal plant Datisca glomerata Induction takes place specifically in cells infected by the microsymbiont, prior to the onset of bacterial nitrogen fixation. A bacterial gene (Frankia trHbO) encoding a truncated hemoglobin with O (2)-binding kinetics suitable for the facilitation of O (2) diffusion ( ) is also expressed in symbiosis. Nodule oximetry confirms the presence of a molecule that binds oxygen reversibly in D. glomerata nodules, but indicates a low overall hemoglobin concentration suggesting a local function. Frankia TrHbO is likely to be responsible for this activity. The function of the D. glomerata truncated hemoglobin is unknown; a possible role in nitric oxide detoxification is suggested.
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Till lärosätets databas
- Av författaren/redakt...
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Pawlowski, Katha ...
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Jacobsen, Karin
-
Alloisio, Nicole
-
Ford Denison, R ...
-
Klein, M
-
Tjepkema, John D
-
visa fler...
-
Winzer, Thilo
-
Sirrenberg, A
-
Guan, Changhui
-
Berry, Alison M
-
visa färre...
- Artiklar i publikationen
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Plant Biol (Stut ...
- Av lärosätet
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Stockholms universitet