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Appenroth KJ, Sree KS, Fakhoorian T, Lam E. Resurgence of duckweed research and applications: report from the 3rd International Duckweed Conference. PLANT MOLECULAR BIOLOGY 2015; 89:647-654. [PMID: 26506824 DOI: 10.1007/s11103-015-0396-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 10/19/2015] [Indexed: 06/05/2023]
Abstract
Duckweed, flowering plants in the Lemnaceae family, comprises the smallest angiosperms in the plant kingdom. They have some of the fastest biomass accumulation rates reported to date for plants and have the demonstrated ability to thrive on wastewater rich in dissolved organic compounds and thus could help to remediated polluted water resources and prevents eutrophication. With a high quality genome sequence now available and increased commercial interest worldwide to develop duckweed biomass for renewables such as protein and fuel, the 3rd International Duckweed Conference convened at Kyoto, Japan, in July of 2015, to update the community of duckweed researchers and developers on the progress in the field. In addition to sharing results and ideas, the conference also provided ample opportunities for new-comers as well as established workers in the field to network and create new aliances. We hope this meeting summary will also help to disseminate the key advances and observations that have been presented in this conference to the broader plant biology community in order to encourage increased cross-fertilization of ideas and technologies.
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Affiliation(s)
- Klaus-J Appenroth
- Institute of General Botany and Plant Physiology, University of Jena, 07743 Jena, Germany
| | - K Sowjanya Sree
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Noida, 201313, India
| | | | - Eric Lam
- Department of Plant Biology and Pathology, Rutgers the State University of New Jersey, New Brunswick, NJ, 08901, USA.
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Huang M, Fang Y, Liu Y, Jin Y, Sun J, Tao X, Ma X, He K, Zhao H. Using proteomic analysis to investigate uniconazole-induced phytohormone variation and starch accumulation in duckweed (Landoltia punctata). BMC Biotechnol 2015; 15:81. [PMID: 26369558 PMCID: PMC4570701 DOI: 10.1186/s12896-015-0198-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 08/29/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Duckweed (Landoltia punctata) has the potential to remediate wastewater and accumulate enormous amounts of starch for bioethanol production. Using systematical screening, we determined that the highest biomass and starch percentage of duckweed was obtained after uniconazole application. Uniconazole contributes to starch accumulation of duckweed, but the molecular mechanism is still unclear. RESULTS To elucidate the mechanisms of high starch accumulation, in the study, the responses of L. punctata to uniconazole were investigated using a quantitative proteomic approach combined with physiological and biochemical analysis. A total of 3327 proteins were identified. Among these identified proteins, a large number of enzymes involved in endogenous hormone synthetic and starch metabolic pathways were affected. Notably, most of the enzymes involved in abscisic acid (ABA) biosynthesis showed up-regulated expression, which was consistent with the content variation. The increased endogenous ABA may up-regulate expression of ADP-glucose pyrophosphorylase to promote starch biosynthesis. Importantly, the expression levels of several key enzymes in the starch biosynthetic pathway were up-regulated, which supported the enzymatic assay results and may explain why there is increased starch accumulation. CONCLUSIONS These generated data linked uniconazole with changes in expression of enzymes involved in hormone biosynthesis and starch metabolic pathways and elucidated the effect of hormones on starch accumulation. Thus, this study not only provided insights into the molecular mechanisms of uniconazole-induced hormone variation and starch accumulation but also highlighted the potential for duckweed to be feedstock for biofuel as well as for sewage treatment.
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Affiliation(s)
- Mengjun Huang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Yang Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Yang Liu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Yanling Jin
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Jiaolong Sun
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Xiang Tao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Xinrong Ma
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Kaize He
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Hai Zhao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences, Chengdu, 610041, China. .,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
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