iTRAQ‐based quantitative proteomic analysis gives insight into sexually different metabolic processes of poplars under nitrogen and phosphorus deficiencies |
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| Authors: | Sheng Zhang Rong Zhou Hongxia Zhao Helena Korpelainen Chunyang Li |
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| Affiliation: | 1. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, P. R. China;2. University of Chinese Academy of Sciences, Beijing, China;3. Department of Agricultural Sciences, Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland;4. The Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin'an, Zhejiang, P. R. China |
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| Abstract: | Male and female poplars (Populus cathayana Rehd.) respond differently to nitrogen (N) and phosphorus (P) deficiencies. In this study, an iTRAQ‐based quantitative proteomic analysis was performed. N and P deficiencies caused 189 and 144 proteins to change in abundance in males and 244 and 464 in females, respectively. Compared to N‐ and P‐deficient males, both N‐ and P‐deficient females showed a wider range of changes in proteins that are involved in amino acid, carbohydrate and protein metabolism, and the sexual differences were significant. When comparing the effects of N‐ and P‐deficiencies, N‐deficient females expressed more changes in proteins that are involved in stress responses and gene expression regulation, while P‐deficient females showed more changes in proteins that are involved in energy and lipid metabolism, stress responses and gene expression regulation. The quantitative RT‐PCR analysis of stress‐related proteins showed that males have a better expression correlation between mRNA and protein levels than do females. This study shows that P. cathayana females are more sensitive and have more rapid metabolic mechanisms when responding to N and P deficiencies than do males, and P deficiency has a wider range of effects on females than does N deficiency. |
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| Keywords: | iTRAQ Nitrogen deficiency Phosphorus deficiency Plant proteomics Poplar Sexual differences |
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