期刊
JOURNAL OF PROTEOME RESEARCH
卷 14, 期 12, 页码 5240-5251出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jproteome.5b00617
关键词
Medicago truncatula; soybean; nodule proteome; drought; split-root system
资金
- Austrian Science foundation (FWF) [P23441-B20]
- Spanish Ministry of Economy and Competitiveness [AGL 2011-23738]
- Austrian Science Fund (FWF) [P 23441] Funding Source: researchfish
- Austrian Science Fund (FWF) [P23441] Funding Source: Austrian Science Fund (FWF)
Legume crops present important agronomical and environmental advantages mainly due to their capacity to reduce atmospheric N-2 to ammonium via symbiotic nitrogen fixation (SNF). This process is very sensitive to abiotic stresses such as drought, but the mechanism underlying this response is not fully understood. The goal of the current work is to compare the drought response of two legumes with high economic impact and research importance, Medicago truncatula and Glycine max, by characterizing their root nodule proteomes. Our results show that, although M. truncatula exhibits lower water potential values under drought conditions compared to G. max, SNF declined analogously in the two legumes. Both of their nodule proteomes are very similar, and comparable down-regulation responses in the diverse protein functional groups were identified (mainly proteins related to the metabolism of carbon, nitrogen, and sulfur). We suggest lipoxygenases and protein turnover as newly recognized players in SNF regulation. Partial drought conditions applied to a split-root system resulted in the local down-regulation of the entire proteome of drought-stressed nodules in both legumes. The high degree of similarity between both legume proteomes suggests that the vast amount of research conducted on M. truncatula could be applied to economically important legume crops, such as soybean.
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