Hydrogen sulfide and rhizobia synergistically regulate nitrogen (N) assimilation and remobilization during N deficiency-induced senescence in soybean

Ni Na Zhang, Hang Zou, Xue Yuan Lin, Qing Pan, Wei Qin Zhang, Jian Hua Zhang, Ge Hong Wei, Zhou Ping Shangguan, Juan Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Hydrogen sulfide (H2S) is emerging as an important signalling molecule that regulates plant growth and abiotic stress responses. However, the roles of H2S in symbiotic nitrogen (N) assimilation and remobilization have not been characterized. Therefore, we examined how H2S influences the soybean (Glycine max)/rhizobia interaction in terms of symbiotic N fixation and mobilization during N deficiency-induced senescence. H2S 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 H2S and rhizobia, together with N accumulation in the organs, and N use efficiency. The synergistic effects of H2S and rhizobia were also demonstrated by effects on the enzyme activities, protein abundances, and gene expressions associated with N metabolism, and senescence-associated genes (SAGs) expression in soybeans grown under conditions of N deficiency. Taken together, these results show that H2S and rhizobia accelerate N assimilation and remobilization by regulation of the expression of SAGs during N deficiency-induced senescence. Thus, H2S enhances the vegetative and reproductive growth of soybean, presumably through interactions with rhizobia under conditions of N deficiency.

Original languageEnglish
Pages (from-to)1130-1147
Number of pages18
JournalPlant Cell and Environment
Volume43
Issue number5
Early online date3 Feb 2020
DOIs
Publication statusPublished - May 2020

Scopus Subject Areas

  • Physiology
  • Plant Science

User-Defined Keywords

  • assimilation
  • hydrogen sulfide (H2S)
  • nitrogen
  • remobilization
  • rhizobia
  • soybean (Glycine max)

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