期刊
FUNCTIONAL PLANT BIOLOGY
卷 39, 期 12, 页码 1068-1078出版社
CSIRO PUBLISHING
DOI: 10.1071/FP12186
关键词
carbohydrate; flowering stem; Tos17
资金
- Biotechnology and Biological Sciences Research Council UK
- BASF Plant Sciences LLC.
A mutant of rice (Oryza sativa L.) was identified with a Tos17 insertion in Os05g50380, a gene encoding a plastidial large subunit (LSU) of ADP-glucose pyrophosphorylase (AGPase) that was previously called OsAPL3 or OsAGPL1. The insertion prevents the production of a normal transcript. Characterisation of the mutant showed that this LSU is required for 97% of the starch synthesised in the flowering stem (culm), approximately half of the AGPase activity in developing embryos and that it contributes to AGPase activity in the endosperm. Despite the near absence of starch in the culms and reduced starch content in the embryos, the mutant rice plants grow and develop normally, and show no reduction in productivity. The starch content of leaves is increased in the mutant, revealing plasticity in the distribution of photosynthates among different temporary carbohydrate storage pools within the plant.
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