PHYSICOCHEMICAL BASIS FOR RELATIVE SUSCEPTIBILITY OF TWO JUTE MALLOW MORPHOTYPES TO Acraea eponina CRAMER
The leaves of Corchorus olitorius L. are rich in antioxidants, fatty acids, minerals, vitamins and mucilaginous polysaccharides and it was reported in a preliminary study that larval Acraea eponina (Cramer) showed preference for C. olitorius morphotype with serrated leaves (NC1) compared to the morp...
Wedi'i Gadw mewn:
| Prif Awduron: | , |
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| Fformat: | Online |
| Iaith: | Saesneg |
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The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria.
2017
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| Pynciau: | |
| Mynediad Ar-lein: | https://ija.oauife.edu.ng/index.php/ija/article/view/29 |
| Tagiau: |
Ychwanegu Tag
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| Crynodeb: | The leaves of Corchorus olitorius L. are rich in antioxidants, fatty acids, minerals, vitamins and mucilaginous polysaccharides and it was reported in a preliminary study that larval Acraea eponina (Cramer) showed preference for C. olitorius morphotype with serrated leaves (NC1) compared to the morphotype with smooth-edged leaves (NC2). The current study was, therefore, carried out to determine physicochemical properties of C. olitorius that mediate preference of A. eponina for NC1. The proximate and mineral analyses of leaves harvested from the two morphotypes were carried out using standard methods of food analysis. Viscosity of mucilage extracted from the leaves of the two morphotypes was also measured using a viscometer. The results of proximate composition showed that NC1 contained higher amount of crude protein (37.47%) which is essential for tissue formation and rapid growth of the immature larvae. The C. olitorius with serrated leaves also had higher levels of ash (12.59%) and moisture (95.66%) compared to NC2. A similar trend was observed in the mineral content with NC1 containing higher levels of manganese (5.15 mg/100g; needed for formation of insect cuticle), iron (15.71 mg/100g), copper (0.79 mg/100g), magnesium (38.98 mg/100g) and chromium (0.62 mg/100g). However, mucilage from the leaves of NC2 was found to be more viscous, a factor that may reduce the desirability of A. eponina for the morphotype. The results showed that NC1 has a superior nutritional quality necessary for growth and development of the larval A. eponina and this is responsible for the preference for this morphotype by foraging larvae. |
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