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Journal of Integrative Agriculture  2013, Vol. 12 Issue (12): 2149-2156    DOI: 10.1016/S2095-3119(13)60580-8
Crop Genetics · Breeding · Germplasm Resources Advanced Online Publication | Current Issue | Archive | Adv Search |
Molecular Cloning, Expression Analysis and Localization of Exo70A1 Related to Self Incompatibility in Non-Heading Chinese Cabbage (Brassica campestris ssp. chinensis)
 WANG Li, GE Ting-ting, PENG Hai-tao, WANG Cheng, LIU Tong-kun, HOU Xi-lin
1. Horticultural Department, Nanjing Agricultural University, Nanjing 210095, P.R.China
2.State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing 210095, P.R.China
3.Key Laboratory of Southern Vegetable Crop Genetic Improvement, Ministry of Agriculture, Nanjing 210095, P.R.China
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摘要  The exocyst is a conserved protein complex, and required for vesicles tethering, fusion and polarized exocytosis. Exo70A1, the exocyst subunit, is essential for assembly of the exocyst complex. To better understand potential roles of Exo70A1 in non-heading Chinese cabbage (Brassica campestris ssp. chinensis), we obtained the full-length cDNA of Exo70A1 gene, which consisted of 1 917 bp and encoded a protein of 638 amino acids. BlastX showed BcExo70A1 shared 94.9% identity with Brassica oleracea var. acephala (AEI26267.1), and clustered into a same group with other homologues in B. oleracea var. acephala and Brassica napus. Subcellular localization analysis showed BcExo70A1 was localized to punctate structures in cytosol of onion epithelial cells. Results showed that BcExo70A1 was widely presented in stamens, young stems, petals, unpollinated pistils, roots and leaves of self compatible and incompatible plants. The transcripts of BcExo70A1 in non- heading Chinese cabbage declined during initial 1.5 h after incompatible pollination, while an opposite trend was presented after compatible pollination. Our study reveals that BcExo70A1 could play essential roles in plant growth and development, and is related to the rejection of self pollen in non-heading Chinese cabbage.

Abstract  The exocyst is a conserved protein complex, and required for vesicles tethering, fusion and polarized exocytosis. Exo70A1, the exocyst subunit, is essential for assembly of the exocyst complex. To better understand potential roles of Exo70A1 in non-heading Chinese cabbage (Brassica campestris ssp. chinensis), we obtained the full-length cDNA of Exo70A1 gene, which consisted of 1 917 bp and encoded a protein of 638 amino acids. BlastX showed BcExo70A1 shared 94.9% identity with Brassica oleracea var. acephala (AEI26267.1), and clustered into a same group with other homologues in B. oleracea var. acephala and Brassica napus. Subcellular localization analysis showed BcExo70A1 was localized to punctate structures in cytosol of onion epithelial cells. Results showed that BcExo70A1 was widely presented in stamens, young stems, petals, unpollinated pistils, roots and leaves of self compatible and incompatible plants. The transcripts of BcExo70A1 in non- heading Chinese cabbage declined during initial 1.5 h after incompatible pollination, while an opposite trend was presented after compatible pollination. Our study reveals that BcExo70A1 could play essential roles in plant growth and development, and is related to the rejection of self pollen in non-heading Chinese cabbage.
Keywords:  Exo70A1       gene expression       subcellular localization       self-incompatibility       non-heading Chinese cabbage  
Received: 19 November 2012   Accepted:
Fund: 

This work is supported by the National Basic Research Program of China (973 Program, 2009CB119001), the Fundamental Research Funds for the Central Universities of China (KYZ201111), the Natural Science Foundation of Jiangsu Province, China (BK2011643), and the Scientific Innovation Research of College Graduate of Jiangsu Province, China (CXLX11_0688).

Corresponding Authors:  LI Ying, Tel: +86-25-84395756, Fax: +86-25-84395266, E-mail: yingli@njau.edu.cn     E-mail:  yingli@njau.edu.cn
About author:  WANG Li, Tel: +86-25-84395756, Fax: +86-25-84395266, E-mail: 2010204017@njau.edu.cn

Cite this article: 

WANG Li, GE Ting-ting, PENG Hai-tao, WANG Cheng, LIU Tong-kun, HOU Xi-lin. 2013. Molecular Cloning, Expression Analysis and Localization of Exo70A1 Related to Self Incompatibility in Non-Heading Chinese Cabbage (Brassica campestris ssp. chinensis). Journal of Integrative Agriculture, 12(12): 2149-2156.

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