期刊
JOURNAL OF PLANT GROWTH REGULATION
卷 32, 期 2, 页码 417-428出版社
SPRINGER
DOI: 10.1007/s00344-012-9302-8
关键词
Chlorella; Phytohormone; Mixed culture; Plant growth substance; Artificial symbiosis; Azospirillum; Brevundimonas; Auxin; Cytokinin
资金
- National Science Foundation through CBET [1032599]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1032599, 0853483] Funding Source: National Science Foundation
Recent interest in the use of microalgae for the production of biofuels and bioproducts has stimulated an interest in methods to enhance the growth rate of microalgae. This review examines past work involving the stimulation of Chlorella sp. growth and metabolite production by plant growth substances as well as by mixed cultures of Chlorella sp. with bacteria. Plant growth substances known to regulate Chlorella sp. growth and metabolite production include auxins, cytokinins, abscisic acid, polyamines, brassinosteroids, jasmonic acid, salicylic acid, and combinations of two or three of the aforementioned substances. Mixed cultures of bacteria are examined, including both natural bacteria-algae consortia and artificially induced symbioses. For natural consortia, commonly occurring bacterial species, including the genera Brevundimonas and Sphingomonas, are discussed. For artificially induced symbioses, the use of the nitrogen-fixing bacterium Azospirillum is examined in detail. In particular, a variety of studies have involved the coimmobilization of Chlorella sp. with Azospirillum sp. in alginate beads, with the goal of using the mixed culture to treat wastewater. In summary, the use of plant growth substances and mixed cultures provides two methods to increase the growth of Chlorella sp., whether for the production of lipids for biofuels, the production of bioproducts, the treatment of wastewater, or a variety of other reasons.
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