Gene Details:

• MSU gene ID: LOC_Os09g23200
• RAPdb gene ID: Os09g0395300
• Gene Symbol: RL9 SLL1 AH2 OsADD1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• RL9 is mainly expressed in roots, leaves, and flowers.
• The SLL1 gene was expressed at the lateral root tip, whereas SLL1 expression was not detected in the elongation zone of the crown roots.
• These results indicate that the lateral root specific defect in SLL1 mutant is caused by the different expression patterns of SLL1 in lateral and crown roots.
• In this study, we characterized two rice (Oryza sativa) allelic rolled-leaf mutants, rolled leaf 9-1 (RL9-1) and RL9-2, which display very similar phenotypes with completely adaxialized leaves and malformed spikelets.
• Here, we show the isolation and functional characterization of SHALLOT-LIKE1 (SLL1), a key gene controlling rice leaf rolling.
• SLL1 is transcribed in various tissues and accumulates in the abaxial epidermis throughout leaf development.
• Our findings identify the role of SLL1 in the modulation of leaf abaxial cell development and in sustaining abaxial characteristics during leaf development.
• An SLL1 mutant has decreased lateral root growth due to a defect in the cell elongation.
• SLL1 encodes a SHAQKYF class MYB family transcription factor belonging to the KANADI family.
• We have identified a gene, SHORT LATERAL ROOT LENGTH1 (SLL1), which is important for the elongation of lateral roots in rice.
• In addition, SLL1 over-expressers produced significantly longer lateral roots compared to the wild-type, and thus SLL1 gene would be very useful for improving rice root architecture.
• SLL1, which encodes a member of the stearoyl-acyl carrier protein fatty acid desaturase family, is involved in cell elongation in lateral roots via regulation of fatty acid content in rice.
• SLL1 deficiency leads to defective programmed cell death of abaxial mesophyll cells and suppresses the development of abaxial features.
• We measured the fatty acid content and found that the 18:0 content in the SLL1 mutant root was approximately 4 times that in the wild-type root.
• The transient expression of a RL9-GFP (green fluorescent protein) fusion protein has indicated that RL9 protein is localized in the nucleus, suggesting that RL9 acts as a putative transcription factor.
• Additionally, SLL1 deficiency results in increased chlorophyll and photosynthesis.
• AH2 encodes a MYB domain protein that determines hull fate and affects grain yield and quality in rice.
• In the study, AH2 encodes a MYB domain protein, and functions in the development of hull and grain.
• Mutation of AH2 produces smaller grains and alters grain quality including decreased amylose content and gel consistency, and increased protein content.
• Our results revealed that AH2 plays an important role in the determination of hull epidermis development, palea identity, and grain size.
• Meantime, part of the hull lost the outer silicified cells, and induces a transformation of the outer rough epidermis to inner smooth epidermis cells, and the body of the palea was reduced in the AH2 muant.

Function-related keywords:

• root ,  crown-root ,  leaf ,  flower ,  spikelet ,  leaf-rolling ,  growth ,  transcription-factor ,  lateral-root ,  cell-death ,  photosynthesis ,  architecture ,  crown ,  cell-elongation ,  leaf-development ,  root-architecture ,  grain ,  development ,  grain-yield ,  yield ,  grain-size ,  palea ,  quality ,  epidermis ,  grain-quality

Literature:

• SLL1, which encodes a member of the stearoyl-acyl carrier protein fatty acid desaturase family, is involved in cell elongation in lateral roots via regulation of fatty acid content in rice .  DOI:  10.1016/j.plantsci.2013.01.003 ;  PMID:  23602094
• SHALLOT-LIKE1 is a KANADI transcription factor that modulates rice leaf rolling by regulating leaf abaxial cell development .  DOI:  10.1105/tpc.108.061457 ;  PMID:  19304938
• Isolation and characterization of a rice mutant with narrow and rolled leaves .  DOI:  10.1007/s00425-010-1180-3 ;  PMID:  20443024
• ROLLED LEAF 9, encoding a GARP protein, regulates the leaf abaxial cell fate in rice .  DOI:  10.1007/s11103-008-9365-x ;  PMID:  18594992
• AH2 encodes a MYB domain protein that determines hull fate and affects grain yield and quality in rice .  DOI:  10.1111/tpj.14481 ;  PMID:  31357245

Related News:

Gene Resources:

• NCBI ID: FJ268747
• UniProt accessions:

Sequences: