Gene Details:

• MSU gene ID: LOC_Os04g33720
• RAPdb gene ID: Os04g0413200
• Gene Symbol: OSINV4
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• The down-regulation of OSINV4 expression in the tapetum at YM may cause a disruption in hexose production and starch formation in the pollen grains.
• In a cold-tolerant cultivar, OSINV4 expression was not reduced by cold; sucrose did not accumulate in the anthers and starch formation in the pollen grains was not affected.
• Perturbed carbohydrate metabolism, which is particularly triggered by repressed genes OSINV4 and OsMST8 during chilling, causes unusual starch storage in the endothecium and this also contributes to other symptoms such as vacuolation and poor microspore wall formation.
• OSINV4 is transiently expressed in the tapetum cell layer at the YM stage, and later from the early binucleate stage in the maturing microspores.
• Expression analysis of two cell wall (OSINV1, 4) and one vacuolar (OSINV2) acid invertase genes showed that OSINV4 is anther-specific and downregulated by cold treatment.
• Cold-induced repression of the rice anther-specific cell wall invertase gene OSINV4 is correlated with sucrose accumulation and pollen sterility.

Function-related keywords:

• starch ,  chilling ,  microspore ,  anther ,  sterility ,  pollen ,  tapetum ,  grain ,  cell-wall

Literature:

• Effects of chilling on male gametophyte development in rice .  DOI:  10.1016/j.cellbi.2006.03.004 ;  PMID:  16730464
• Cold-induced repression of the rice anther-specific cell wall invertase gene OSINV4 is correlated with sucrose accumulation and pollen sterility .  DOI:  10.1111/j.1365-3040.2005.01390.x
• Identification of candidate genes controlling chilling tolerance of rice in the cold region at the booting stage by BSA-Seq and RNA-Seq .  DOI:  10.1098/rsos.201081 ;  PMID:  33391797

Related News:

Gene Resources:

• NCBI ID: AY220486
• UniProt accessions:

Sequences: