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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.6
- 수록면
- 506 - 517 (12page)
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Arabidopsis Shaggy-like protein kinases (ASKs) are Ara-bidopsis thaliana homologs of glycogen synthase kinase 3/SHAGGY-like kinases (GSK3/SGG), which are com-prised of 10 genes with diverse functions. To dissect the function of ASKβ (AtSK32), ASKβ antisense transgenic plants were generated, revealing the effects of ASKβ down-regulation in Arabidopsis. Suppression of ASKβ expression specifically interfered with pollen development and fertility without altering the plants’ vegetative phenotypes, which differed from the phenotypes reported for Arabidopsis plants defective in other ASK members. The strength of these phenotypes showed an inverse correlation with the expression levels of ASKβ and its co-expressed genes. In the aborted pollen of ASKβ antisense plants, loss of nuclei and shrunken cytoplasm began to appear at the bicellular stage of microgametogenesis. The in silico analysis of promoter and the expression characteristics implicate ASKβ is associated with the expression of genes known to be involved in sperm cell differentiation. We speculate that ASKβ indirectly affects the transcription of its co-expressed genes through the phosphorylation of its target proteins during late pollen development.
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