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Promotion of plant growth by polymers of lactic acid |
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| Authors: | Alan M Kinnersley Taylor C Scott III John H Yopp George H Whitten |
| Institution: | (1) CPC International, Moffett Technical Center, Box 345, 60501 Summit-Argo, IL, USA;(2) Department of Botany, Southern Illinois University, 62901 Carbondale, IL, USA;(3) Present address: Phyton Technologies, Inc., 1299, Bethel Valley Road, 37830 Oak Ridge, TN, USA;(4) Present address: Southern Illinois Forensic Science Lab, 606, East College Street, 62901 Carbondale, IL, USA;(5) Present address: Department of Botany, Southern Illinois University, 62901 Carbondale, IL, USA;(6) Present address: Lymphomed Inc., 2020, Ruby Street, 60160 Melrose Park, IL, USA |
| Abstract: | Polymers of L-lactic acid are shown to promote plant growth. Dry weight of duckweed (Lemna minor L.) and corn (Zea mays L) was more than doubled when plants were grown in media containing the dimer of L-lactic acid, L-lactoyllactic acid. Higher polymers were equally effective at increasing plant biomass. Monomeric lactic acid and polymers of D-lactic acid showed no biological activity. Increased plant biomass was accompanied by increased chlorophyll accumulation and root growth. Promotion of chlorophyll accumulation and biomass may be due to increased ability to assimilate nutrients as plants treated with L-lactoyllactic acid showed no decrease in biomass when grown in medium that was growth limiting for control plants. |
| Keywords: | plant growth regulator lactic acid polymer degree of polymerization (DP) |
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