期刊
PLANTA
卷 252, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/s00425-020-03422-1
关键词
Hypoxia; Legume; Nitrogen-fixing symbiosis; Phytoglobin NO respiration; Salt stress
资金
- INRAE
- Comite Mixte Franco-Tunisien pour la Cooperation Universitaire (PHC Utique) [17G0904]
Main conclusion InMedicago sativanodulated roots, NR-dependent NO production is involved in maintaining energy state, presumably through phytoglobin NO respiration, under both salinity and hypoxia stress. The response to low and average salinity stress and to a 5 day-long flooding period was analyzed inM. sativanodulated roots. The two treatments result in a decrease in the biological nitrogen fixation capacity and the energy state (evaluated by the ATP/ADP ratio), and conversely in an increase nitric oxide (NO) production. Under salinity and hypoxia treatments, the use of either sodium tungstate, an inhibitor of nitrate reductase (NR), or carboxy-PTIO, a NO scavenger, results in a decrease in NO production and ATP/ADP ratio, meaning that NR-dependent NO production participates to the maintenance of the nodulated roots energy state.
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