Mechanism of paraquat resistance in Crassocephalum crepidioides (Benth.) S. Moore during immature stage


Citation

Ismail B.S., . and Chuah T.S., . and Khatijah H.H., . Mechanism of paraquat resistance in Crassocephalum crepidioides (Benth.) S. Moore during immature stage. pp. 1-10. ISSN 1511-3701

Abstract

The mechanism of paraquat resistance in Crassocephalum crepidioides at the six-leaf stage was investigated. The extractabk paraquat was not metabolized by the leaf tissue in the resistant (R) and susceptible (S) biotypes. Therefore differential metabolism does not appear to play a role in the mechanism of resistance. The S biotype absorbed 44 more HCfaraquat than the R biotype. However more than 98 of the absorbed HC-paraquat remained on the treated leaf of both biotypes. The difference in absorption had a negative correlation with the amount of epicuticular wax as well as the cuticle of leaf surfaces in both biotypes. The results of this study suggest that differential absorption may be a factor that accounts for resistance to paraquat at the six-leaf stage.


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Abstract

The mechanism of paraquat resistance in Crassocephalum crepidioides at the six-leaf stage was investigated. The extractabk paraquat was not metabolized by the leaf tissue in the resistant (R) and susceptible (S) biotypes. Therefore differential metabolism does not appear to play a role in the mechanism of resistance. The S biotype absorbed 44 more HCfaraquat than the R biotype. However more than 98 of the absorbed HC-paraquat remained on the treated leaf of both biotypes. The difference in absorption had a negative correlation with the amount of epicuticular wax as well as the cuticle of leaf surfaces in both biotypes. The results of this study suggest that differential absorption may be a factor that accounts for resistance to paraquat at the six-leaf stage.

Additional Metadata

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Item Type: Article
AGROVOC Term: Herbicides
AGROVOC Term: Plant cuticle
AGROVOC Term: Paraquat
AGROVOC Term: Asteraceae
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:26
URI: http://webagris.upm.edu.my/id/eprint/21199

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