Characterization of BcMF23a and BcMF23b, two putative pectin methylesterase genes related to pollen development in Brassica campestris ssp. chinensis

详细信息    查看全文

• 作者：Sue Lin ; Li Huang ; Xiaolin Yu ; Xingpeng Xiong ; Xiaoyan Yue…
• 关键词：Brassica campestris ; Brassica rapa ; Male fertility ; Pectin methylesterase ; Pollen
• 刊名：Molecular Biology Reports
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：44
• 期：1
• 页码：139-148
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Animal Biochemistry; Animal Anatomy / Morphology / Histology;
• 出版者：Springer Netherlands
• ISSN：1573-4978
• 卷排序：44

文摘

Two homologous genes, Brassica campestris Male Fertility 23a (BcMF23a) and Brassica campestris Male Fertility 23b (BcMF23b), encoding putative pectin methylesterases (PMEs) were isolated from Brassica campestris ssp. chinensis (syn. Brassica rapa ssp. chinensis). These two genes sharing high sequence identity with each other were highly expressed in the fertile flower buds but silenced in the sterile ones of genic male sterile line system (‘Bcajh97-01A/B’). Results of RT-PCR and in situ hybridization suggested that BcMF23a and BcMF23b were pollen-expressed genes, whose transcripts were first detected at the binucleate pollen and maintained throughout to the mature pollen grains. Western blot indicated that both of the putative BcMF23a and BcMF23b proteins are approximately 40 kDa, which exhibited extracellular localization revealed by transient expression analysis in the onion epidermal cells. The promoter of BcMF23a was active specifically in pollen during the late pollen developmental stages, while, in addition to the pollen, BcMF23b promoter drove an extra gene expression in the valve margins, abscission layer at the base of the first true leaves, taproot and lateral roots in seedlings.