OsABCI8,TSC1

• Symbol: OsABCI8,TSC1
• MSU: LOC_Os11g29850
• RAPdb: Os11g0490800

• A naturally occurring conditional albino mutant in rice caused by defects in the plastid-localized OsABCI8 transporter., 2017, Plant Mol Biol.
• TSC1 enables plastid development under dark conditions, contributing to rice adaptation to transplantation shock., 2017, J Integr Plant Biol.

Genbank accession number

• Subcellular localization demonstrated that OsABCI8 is a chloroplast ABC transporter
• Besides defects in chloroplast development and chlorophyll biosynthesis, the mutant phenotype is accompanied by a higher accumulation of iron, suggesting that OsABCI8 is involved in iron transportation and/or homeostasis in rice
• Our results demonstrate that OsABCI8 represents a conserved ABCI protein involved in transition metals transportation and/or homeostasis and suggest an important role of the plastid-localized OsABCI8 for chloroplast development
• Blocking light from reaching the juvenile leaves and leaf primordia caused chloroplast deficiencies in transplanted tsc1 seedlings
• TSC1 was upregulated following transplantation, and modulated the iron and copper levels, thereby regulating prolamellar body formation during the early P4 stage of leaf development
• TSC1 enables plastid development under dark conditions, contributing to rice adaptation to transplantation shock.
• We found that TSC1 controls plastid development in rice under dark conditions, and functions independently of light signaling
• Therefore, TSC1 is indispensable for plastid development in the absence of light, and contributes to adaptation to transplantation shock
• TSC1 encodes a noncanonical ATP-binding cassette (ABC) transporter homologous to AtNAP14 and of cyanobacterial origin