Activities and Toxicity of a Novel Plant Growth Regulator 2-Furan-2-yl-[1,3] Dioxolane
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Abstract
The effect of activities of three substituted dioxolanes on wheat growth were assessed under laboratory/field conditions. Compound III, 2-furan-2-yl-[1,3]dioxolane, demonstrated good activity in shortening germination time, improving root growth, and increasing drought and salinity tolerance. In a water medium, the three substituted dioxolanes increased root numbers. Under water-deficit stress all treated seeds germinated by the fifth day, whereas controls did not germinate until after 6.5 days. These dioxolanes increased root number and root length. Compound III was the most outstanding of the three, with an increase of 227% in root number, 234% in root length, and 295% in shoot dry mass. Under salinity stress, these dioxolanes significantly improved growth (promotion of root number and shoot dry mass), although they had no effect on tissue moisture content. Field trials showed that compound III promoted root growth, increased root fresh weight significantly, and maintained a normal yield under water-deficit conditions. It showed low mammalian and environmental toxicity in various toxicologic tests. Results of Salmonella typhimurium reversion assay with and without a S9 mixture and the chromosomal aberration assay revealed that it had no mutagenic potential under experimental conditions.
Keywords
2-Furan-2-yl-[1,3]dioxolane Drought stress Plant growth regulator Root growth Salinity stress ToxicityNotes
Acknowledgments
This research program was supported by Key Technologies R & D Program of China (No. 2004BA308A21-5 and 2006BAE01A07-10) and Hi-tech R & D Program of China (863 Program) (No. 2006AA100204). The authors thank the Experimental Animal Center of Shanxi Medical University, Institute of Labor Health Prevention and Treatment of Occupational Diseases of Beijing, Institute of Environmental Health Monitoring, and Chinese Academy of Preventive Medicine for technical and equipment assistance.
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