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Int. J. Mol. Sci. 2016, 17(9), 1475; doi:10.3390/ijms17091475

Comparative Proteomic Analysis of Mature Pollen in Triploid and Diploid Populus deltoides

1
State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
2
Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Setsuko Komatsu
Received: 3 July 2016 / Revised: 16 August 2016 / Accepted: 29 August 2016 / Published: 3 September 2016
(This article belongs to the Special Issue Plant Proteomic Research)
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Abstract

Ploidy affects plant growth vigor and cell size, but the relative effects of pollen fertility and allergenicity between triploid and diploid have not been systematically examined. Here we performed comparative analyses of fertility, proteome, and abundances of putative allergenic proteins of pollen in triploid poplar ‘ZhongHuai1’ (‘ZH1’, triploid) and ‘ZhongHuai2’ (‘ZH2’, diploid) generated from the same parents. The mature pollen was sterile in triploid poplar ‘ZH1’. By applying two-dimensional gel electrophoresis (2-DE), a total of 72 differentially expressed protein spots (DEPs) were detected in triploid poplar pollen. Among them, 24 upregulated and 43 downregulated proteins were identified in triploid poplar pollen using matrix-assisted laser desorption/ionisation coupled with time of-flight tandem mass spectrometer analysis (MALDI-TOF/TOF MS/MS). The main functions of these DEPs were related with “S-adenosylmethionine metabolism”, “actin cytoskeleton organization”, or “translational elongation”. The infertility of triploid poplar pollen might be related to its abnormal cytoskeletal system. In addition, the abundances of previously identified 28 putative allergenic proteins were compared among three poplar varieties (‘ZH1’, ‘ZH2’, and ‘2KEN8‘). Most putative allergenic proteins were downregulated in triploid poplar pollen. This work provides an insight into understanding the protein regulation mechanism of pollen infertility and low allergenicity in triploid poplar, and gives a clue to improving poplar polyploidy breeding and decreasing the pollen allergenicity. View Full-Text
Keywords: poplar; pollen; diploid; triploid; allergenic protein; proteomics poplar; pollen; diploid; triploid; allergenic protein; proteomics
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Zhang, X.-L.; Zhang, J.; Guo, Y.-H.; Sun, P.; Jia, H.-X.; Fan, W.; Lu, M.-Z.; Hu, J.-J. Comparative Proteomic Analysis of Mature Pollen in Triploid and Diploid Populus deltoides. Int. J. Mol. Sci. 2016, 17, 1475.

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