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Hydrogen sulfide and rhizobia synergistically regulate nitrogen (N) assimilation and remobilization during N deficiency‐induced senescence in soybean
Author(s) -
Zhang NiNa,
Zou Hang,
Lin XueYuan,
Pan Qing,
Zhang WeiQin,
Zhang JianHua,
Wei GeHong,
Shangguan ZhouPing,
Chen Juan
Publication year - 2020
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.13736
Subject(s) - rhizobia , senescence , biology , iron deficiency , nitrogenase , chlorophyll , nitrogen fixation , photosynthesis , botany , microbiology and biotechnology , bacteria , genetics , medicine , anemia
Hydrogen sulfide (H 2 S) is emerging as an important signalling molecule that regulates plant growth and abiotic stress responses. However, the roles of H 2 S in symbiotic nitrogen (N) assimilation and remobilization have not been characterized. Therefore, we examined how H 2 S influences the soybean ( Glycine max )/rhizobia interaction in terms of symbiotic N fixation and mobilization during N deficiency‐induced senescence. H 2 S enhanced biomass accumulation and delayed leaf senescence through effects on nodule numbers, leaf chlorophyll contents, leaf N resorption efficiency, and the N contents in different tissues. Moreover, grain numbers and yield were regulated by H 2 S and rhizobia, together with N accumulation in the organs, and N use efficiency. The synergistic effects of H 2 S and rhizobia were also demonstrated by effects on the enzyme activities, protein abundances, and gene expressions associated with N metabolism, and senescence‐associated genes ( SAG s) expression in soybeans grown under conditions of N deficiency. Taken together, these results show that H 2 S and rhizobia accelerate N assimilation and remobilization by regulation of the expression of SAG s during N deficiency‐induced senescence. Thus, H 2 S enhances the vegetative and reproductive growth of soybean, presumably through interactions with rhizobia under conditions of N deficiency.