Supplement to Plant and Cell Physiology Vol. 49
Conference information
Host: The Japanese Society of Plant Physiologists
Function of the OsMADS13 Gene for Pistil Development in Rice
Pages 0234
Details
Host: The Japanese Society of Plant Physiologists
Pages 0234
Genetic and molecular studies in dicots have led to proposal of the ABCDE model for control of floral organ identity. Class-D MADS-box genes belong to class-C subfamily, and they are specifically expressed in ovule. Two class-D genes, OsMADS13 and OsMADS21, have been isolated from rice. However, their functions are still unclear.
Our in situ hybridization analysis showed that OsMADS13 expression is first detected in ovule primordium. As ovule develops, OsMADS13 is expressed in outer and inner integuments, nucellus and adaxial side of carpel.
OsMADS13 RNAi plants have thick integuments and no embryo sac. Ovules of osmads13 mutants caused by Tos17 insertion are homeotically transformed into carpelloid structures. These indicate that OsMADS13 is necessary for normal ovule development.
We are also studying the effect of ectopic expression of OsMADS13 in rice. Based on these observations, we will discuss the role of OsMADS13 in pistil development.
