Os09g0537700

The rice Os09g0537700 was reported as OsRNS4 in 2014 by researchers from China.

Annotated Information

S-like ribonucleases (S-like RNases) are homologous to S-ribonucleases (S-RNases), but are not involved in self-incompatibility.
In dicotyledonous plants, S-like RNases play an important role in phosphate recycling during senescence and are induced by inorganic phosphate-starvation and in response to defense and mechanical wounding.

The seedlings overexpressing OsRNS4 had longer coleoptiles and first leaves than wild-type seedlings under red light (R) and far-red light (FR), suggesting negative regulation of OsRNS4 in photomor-phogenesis in rice seedlings.
Moreover, ABA-induced growth inhibition of rice seedlings was significantly increased in the OsRNS4-overexpression (OsRNS4-OX) lines compared with that in WT, suggesting that OsRNS4 probably acts as a positive regulator in ABA responses in rice seedlings.
In addition, our results demonstrate that OsRNS4-OX lines have enhanced tolerance to high salinity compared to WT.

The OsRNS4 gene was expressed at relatively high levels in leaves although its transcripts were detected in various organs. OsRNS4 expression was regulated by salt, PEG and ABA.

The process of genome evolution by duplication in each species appears to have been quite different. Functional classifications of the proteins based on Gene Ontology (GO) annotations are shown in Figure 2; the numbers of known functional domains were not significantly different between the two species.

Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, 250100 Jinan, China

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