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Crataeva tapia bark lectin is an affinity adsorbent and insecticidal agent
Regina Maria Sousa de Araújo1, Rodrigo da Silva Ferreira, Thiago Henrique Napoleão
1Departamento de Bioquímica-CCB, Universidade Federal de Pernambuco, Cidade Universitária, 50670-420 Recife, Pernambuco, Brazil.
Plant Science : an International Journal of Experimental Plant Biology
|December 27, 2011
Summary
Crataeva tapia bark lectin (CrataBL) exhibits hemagglutinating properties and acts as an effective insecticide against termites. This plant lectin shows potential for pest control applications.
Area of Science:
- Biochemistry
- Plant Science
- Entomology
Background:
- Hemagglutinating activity is linked to carbohydrate-binding proteins called lectins.
- Plant lectins are increasingly studied for their diverse biological functions and potential applications.
Purpose of the Study:
- To purify and characterize Crataeva tapia bark lectin (CrataBL).
- To investigate the insecticidal properties of CrataBL against termites.
Main Methods:
- Ion exchange chromatography for lectin purification.
- SDS-PAGE and glycoprotein staining for molecular characterization.
- Insecticidal assays against Nasutitermes corniger.
Main Results:
- CrataBL was purified (28 mg/g bark), showing thermo-stability and ion-independence.
- N-terminal sequencing indicated similarity to plant defensive proteins; glycosylation was confirmed.
- CrataBL demonstrated significant insecticidal activity against Nasutitermes corniger with an LC₅₀ of 0.475 mg mL⁻¹.
Conclusions:
- Crataeva tapia bark lectin is a glycosylated protein with hemagglutinating activity.
- CrataBL possesses potent insecticidal properties, suggesting its utility in termite control.
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