Literature DB >> 19733934

Involvement of nitric oxide in the inhibition of nitrogenase activity by nitrate in Lotus root nodules.

Kazuhisa Kato1, Koki Kanahama, Yoshinori Kanayama.   

Abstract

Nitrogenase activity, as acetylene-reduction activity (ARA), in Lotus root nodules was clearly inhibited 27h after the addition of nitrate. Nitric oxide (NO) production was detected at that time in nitrate-supplied root nodules using the NO-reactive fluorescent probe diaminofluorescein-2 diacetate. The involvement of NO production in the inhibition of nitrogenase activity by nitrate was investigated using the NO donor sodium nitroprusside (SNP) and the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (c-PTIO). SNP inhibited ARA at 1mM, and c-PTIO suppressed the inhibition of ARA by nitrate. These results suggest that NO is involved in the inhibition of nitrogenase activity by nitrate in Lotus root nodules. Copyright 2009 Elsevier GmbH. All rights reserved.

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Year:  2009        PMID： 19733934     DOI： 10.1016/j.jplph.2009.08.006

Source DB:  PubMed          Journal:  J Plant Physiol        ISSN： 0176-1617            Impact factor:   3.549


  18 in total

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