Apr 27, 2020

Spatial distribution of the lectin protein Osr40g3 determines its dual regulatory function in imparting salinity tolerance while impeding seed development in rice

BioRxiv : the Preprint Server for Biology
C. RoySoumitra Paul


While the role of OsR40 family of lectin proteins in osmotic stress has long been known, their mechanism of stress tolerance has not yet been explored. Among them, the expression of Osr40g3 was most strongly induced in response to salt stress. Here, we report that Osr40g3 plays a dual role in regulating salinity tolerance as well as seed development in rice. The overexpression of Osr40g3 under control of a constitutive promoter significantly improved salinity tolerance but impaired seed development in transgenic rice. Remarkably, transgenic Arabidopsis ectopically expressing Osr40g3 exhibited enhanced salinity tolerance but produced seeds normally. It was further confirmed that this Osr40g3-mediated impairment in seed development was due to pollen sterility in the transgenic rice while the pistils remained unaffected. The gene further displayed a precise tissue-specific expression pattern which was essential for proper seed development in rice. The constitutive overexpression led to the interaction of Osr40g3 with OsGF14e in the stamens presumably repressing it which led to pollen sterility. This interaction was, however, highly specific due to the structural distinctiveness of OsGF14e making the phenomenon rice-specific. Never...Continue Reading

  • References
  • Citations


  • We're still populating references for this paper, please check back later.
  • References
  • Citations


  • This paper may not have been cited yet.

Mentioned in this Paper

Anatomical Space Structure
Biological Evolution

Related Feeds

BioRxiv & MedRxiv Preprints

BioRxiv and MedRxiv are the preprint servers for biology and health sciences respectively, operated by Cold Spring Harbor Laboratory. Here are the latest preprint articles (which are not peer-reviewed) from BioRxiv and MedRxiv.