Nitrogen-Fixing Nodules Are an Important Source of Reduced Sulfur, Which Triggers Global Changes in Sulfur Metabolism in Lotus japonicus
Nitrogen-Fixing Nodules Are an Important Source of Reduced Sulfur, Which Triggers Global Changes in Sulfur Metabolism in Lotus japonicus
复制标题
固氮结核是还原硫的重要来源,引发莲子硫代谢的全局变化
DOI:
10.1105/tpc.15.00108
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发表时间:
2015
期刊:
影响因子:
11.6
通讯作者:
Flemetakis M
中科院分区:
文献类型:
--
作者:
Kalloniati C;Krompas P;Karalias G;Udvardi MK;Rennenberg H;Herschbach C;Flemetakis M
We combined transcriptomic and biochemical approaches to study rhizobial and plant sulfur (S) metabolism in nitrogen (N) fixing nodules (Fix+) ofLotus japonicus, as well as the link of S-metabolism to symbiotic nitrogen fixation and the effect of nodules on whole-plant S-partitioning and metabolism. Our data reveal that N-fixing nodules are thiol-rich organs. Their high adenosine 5′-phosphosulfate reductase activity and strong35S-flux into cysteine and its metabolites, in combination with the transcriptional upregulation of several rhizobial and plant genes involved in S-assimilation, highlight the function of nodules as an important site of S-assimilation. The higher thiol content observed in nonsymbiotic organs of N-fixing plants in comparison to uninoculated plants could not be attributed to local biosynthesis, indicating that nodules are an important source of reduced S for the plant, which triggers whole-plant reprogramming of S-metabolism. Enhanced thiol biosynthesis in nodules and their impact on the whole-plant S-economy are dampened in plants nodulated by Fix−mutant rhizobia, which in most respects metabolically resemble uninoculated plants, indicating a strong interdependency between N-fixation and S-assimilation.
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影响因子:
27.5
作者:
Chang, Christine;Damiani, Isabelle;Frendo, Pierre
通讯作者:
Frendo, Pierre
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
C. Brunold
通讯作者:
C. Brunold
DOI:
10.1146/annurev.pp.43.060192.001545
发表时间:
1992
期刊:
--
影响因子:
--
作者:
A. Schmidt;K. Jäger
通讯作者:
A. Schmidt;K. Jäger
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
H. Rennenberg;R. Schupp;A. Schneider
通讯作者:
A. Schneider
DOI:
--
发表时间:
2001
期刊:
Die Naturwissenschaften
影响因子:
--
作者:
C. Herschbach;H. Rennenberg
通讯作者:
H. Rennenberg