TDF1作为MYB家族的转录因子,参与了胼胝质的降解过程,并控制绒毡层的分化从而影响着花粉粒的正常发育.以一株通过甲基磺酸乙酯(EMS)诱变Col-0野生型拟南芥获得的温敏雄性不育突变体atms1(ambient temperature-sensory male sterility1)...TDF1作为MYB家族的转录因子,参与了胼胝质的降解过程,并控制绒毡层的分化从而影响着花粉粒的正常发育.以一株通过甲基磺酸乙酯(EMS)诱变Col-0野生型拟南芥获得的温敏雄性不育突变体atms1(ambient temperature-sensory male sterility1)对温度敏感机制进行了研究.通过构建TDF1反义RNA表达载体,在atms1突变体背景下抑制TDF1的表达来观察突变体花粉育性的变化,发现在27℃时的atms1突变体花粉的育性得以恢复.这一结果表明在花粉发育的过程中TDF1对ATMS1m具有一定的调控作用.展开更多
In anther development, tapetal cells take part in complex processes, including endomitosis and apoptosis （programmed cell death）. The tapetum provides many of the proteins, lipids, polysaccharides and other molecule...In anther development, tapetal cells take part in complex processes, including endomitosis and apoptosis （programmed cell death）. The tapetum provides many of the proteins, lipids, polysaccharides and other molecules necessary for pollen development. Several transcription factors, including DYT1, TDF1, AMS, MS188 and MS1, have been reported to be essential for tapetum development and function in Arabidopsis thaliana. Here, we present a detailed cytological analysis of knockout mutants for these genes, along with an in situ RNA hybridization experiment and double mutant analysis showing that these transcription factors form a genetic pathway in tapetum development. DYT1, TDF1 and AMS function in early tapetum development, while MS188 and MS1 are important for late tapetum development. The genetic pathway revealed in this work facilitates further investigation of the function and molecular mechanisms of tapetum development in Arabidopsis.展开更多
文摘TDF1作为MYB家族的转录因子,参与了胼胝质的降解过程,并控制绒毡层的分化从而影响着花粉粒的正常发育.以一株通过甲基磺酸乙酯(EMS)诱变Col-0野生型拟南芥获得的温敏雄性不育突变体atms1(ambient temperature-sensory male sterility1)对温度敏感机制进行了研究.通过构建TDF1反义RNA表达载体,在atms1突变体背景下抑制TDF1的表达来观察突变体花粉育性的变化,发现在27℃时的atms1突变体花粉的育性得以恢复.这一结果表明在花粉发育的过程中TDF1对ATMS1m具有一定的调控作用.
基金supported by grants from the National Natural Science Foundation of China (30925007)Shanghai(11ZR1425800)the State Key Basic Research and Development Program of China (2007CB947600)
文摘In anther development, tapetal cells take part in complex processes, including endomitosis and apoptosis （programmed cell death）. The tapetum provides many of the proteins, lipids, polysaccharides and other molecules necessary for pollen development. Several transcription factors, including DYT1, TDF1, AMS, MS188 and MS1, have been reported to be essential for tapetum development and function in Arabidopsis thaliana. Here, we present a detailed cytological analysis of knockout mutants for these genes, along with an in situ RNA hybridization experiment and double mutant analysis showing that these transcription factors form a genetic pathway in tapetum development. DYT1, TDF1 and AMS function in early tapetum development, while MS188 and MS1 are important for late tapetum development. The genetic pathway revealed in this work facilitates further investigation of the function and molecular mechanisms of tapetum development in Arabidopsis.
