Abstract
T2 ribonuclease family (RNaseT2) proteins are secretory and nonspecific endoribonucleases that have a large conserved biological role. Family members of RNaseT2 are found in every organism and carry out important biological functions. However, little is known about the functions of these proteins in legumes, including potential roles in symbiotic nodulation. This study aimed to characterize and perform bioinformatic analysis of RNaseT2 genes in four legume species that their genome was sequenced. In total, 60 RNaseT2 genes were identified and characterized. By analyzing their phylogeny, we divided these RNaseT2 into five clades. Expression analysis of RNaseT2 genes indicated that these genes are expressed in various tissues, and the most expression level was related to the pod, flower, and root. Moreover, GmaRNS9 expression analysis in soybean was consistent with in silico studies and demonstrated that this gene usually has high root tip expression. GmaRNS9 expression was reduced by Bradyrhizobium japonicum inoculation and nodule formation. Reduced expression of this gene was possibly controlled by the GmNARK gene either directly or pleiotropically through increased phosphorus requirements during increased nodulation. However, the nutrient stress (phosphate and nitrate starvation) led to an increase in the expression level of GmRNS9. In silico and quantitative gene expression analyses showed that RNaseT2 genes could play important roles in the growth and development of legumes as well as nodulation.
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SM contributed to the conception, interpretation, and supervision of the research. MT-M contributed to supervision of the research. NA conducted experiments and evaluated results. SM. and NA contributed to the writing and editing of the manuscript.
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Azizkhani, N., Mirzaei, S. & Torkzadeh-Mahani, M. Genome-wide identification and characterization of legume T2 Ribonuclease gene family and analysis of GmaRNS9, a soybean T2 Ribonuclease gene, function in nodulation. 3 Biotech 11, 495 (2021). https://doi.org/10.1007/s13205-021-03025-x
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DOI: https://doi.org/10.1007/s13205-021-03025-x