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Int. J. Mol. Sci. 2017, 18(12), 2496;

Comparative Proteomics Analyses of Pollination Response in Endangered Orchid Species Dendrobium Chrysanthum

Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Shenzhen Key Laboratory for Orchid Conservation and Utilization, the National Orchid Conservation Center of China and the Orchid Conservation & Research Center of Shenzhen, Shenzhen 518114, China
Author to whom correspondence should be addressed.
These two authors contributed equally to this work.
Received: 1 November 2017 / Revised: 15 November 2017 / Accepted: 17 November 2017 / Published: 23 November 2017
(This article belongs to the Special Issue Selected Papers from the 6th National Plant Protein Research Congress)
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Pollination is a crucial stage in plant reproductive process. The self-compatibility (SC) and self-incompatibility (SI) mechanisms determined the plant genetic diversity and species survival. D. chrysanthum is a highly valued ornamental and traditional herbal orchid in Asia but has been declared endangered. The sexual reproduction in D. chrysanthum relies on the compatibility of pollination. To provide a better understanding of the mechanism of pollination, the differentially expressed proteins (DEP) between the self-pollination (SP) and cross-pollination (CP) pistil of D. chrysanthum were investigated using proteomic approaches—two-dimensional electrophoresis (2-DE) coupled with tandem mass spectrometry technique. A total of 54 DEP spots were identified in the two-dimensional electrophoresis (2-DE) maps between the SP and CP. Gene ontology analysis revealed an array of proteins belonging to following different functional categories: metabolic process (8.94%), response to stimulus (5.69%), biosynthetic process (4.07%), protein folding (3.25%) and transport (3.25%). Identification of these DEPs at the early response stage of pollination will hopefully provide new insights in the mechanism of pollination response and help for the conservation of the orchid species. View Full-Text
Keywords: pollination response; proteomics; functional classification; Dendrobium chrysanthum pollination response; proteomics; functional classification; Dendrobium chrysanthum

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Wang, W.; Yu, H.; Li, T.; Li, L.; Zhang, G.; Liu, Z.; Huang, T.; Zhang, Y. Comparative Proteomics Analyses of Pollination Response in Endangered Orchid Species Dendrobium Chrysanthum. Int. J. Mol. Sci. 2017, 18, 2496.

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