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Selective increase in acyl hydrolase activity by graminicides in wheat
1Institute of Biology, Pedagogical University, 76-200 Słupsk, Poland. antoni.banas@uv.slu.se
Biochemical Society Transactions
|February 15, 2001
Summary
Certain graminicides, like haloxyfop and alloxydim, enhance lipid breakdown in wheat roots. This effect, observed in microsomal preparations, suggests a targeted mechanism beyond general growth inhibition.
Area of Science:
- Biochemistry
- Plant Science
- Agricultural Chemistry
Background:
- Lipid metabolism is crucial for plant growth and development.
- Understanding herbicide-plant interactions is key to developing selective weed control strategies.
Purpose of the Study:
- To investigate the impact of specific graminicides on lipid catabolism in wheat.
- To determine if observed effects are linked to general growth inhibition.
Main Methods:
- Wheat seedlings were treated with graminicides (haloxyfop, alloxydim, diquat, paraquat) or a control solution.
- Microsomal preparations from roots were incubated with 1-(14)C-labelled fatty acids.
- Radioactivity distribution among lipid classes was analyzed to quantify fatty acid release.
Main Results:
- Haloxyfop and alloxydim treatments resulted in a 1.4-2 fold increase in fatty acid release compared to controls.
- Diquat and paraquat treatments showed no significant difference in fatty acid release compared to controls.
- Increased lipid catabolism was observed in plants treated with specific graminicides.
Conclusions:
- Graminicides such as haloxyfop and alloxydim can enhance lipid catabolism in sensitive plant species.
- This effect on lipid metabolism is specific and not a general consequence of growth inhibition by herbicides.