Os01g0795400
The rice Os01g0795400 was reported as Hwi2 in 2014 [1] by researchers from China.
Contents
Annotated Information
Figure 6. Postulated functional model of the induction of hybrid weakness..[1].
Gene Symbol
- Os01g0795400 <=> Hwi2,OsHwi2
Function
- Hwi1 and Hwi2 are likely to determine the high temperature-dependent expression of hybrid weakness in interspecific hybrids of rice.
- Hwi2, a rare allele that is pre- dominantly distributed in indica rice (Oryza sativa), encodes a secreted putative subtilisin-like protease.
- Functional analysis indicated that pyramiding of Hwi1 and Hwi2 activates the autoimmune response in the basal nodes of hybrids, interrupting root formation and then impairing shoot growth.
Postulated functional model
- A certain substrate X is able to be processed by Hwi2 out of the plasma membrane. The product is perceived by 25L1–25L2 membrane-targeted heterodimer to activate downstream immune responses, such as PCD and hypersensitive response-like symptoms in the basal nodes of weakness expressed plants, and impair the crown root formation.
- Simultaneously, the immune signal delivers to the above-ground parts. Constitutively activated defence responses suppress the growth of above-ground tissues and organs. On the other hand, the root developmental defect blocks the nutrient uptake of plant, which further impairs the growth and development.
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Labs working on this gene
- National Key Laboratory of Plant Molecular Genetics, National Center for Plant Gene Research (Shanghai), Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China.
- Centre for Cell and Developmental Biology, School of Life Sciences, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
- National Center for Gene Research, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200233, China.
