PHENOLICS INVOLVEMENT IN SWEET POTATO RESISTANCE TO Meloidogyne incognita AND M. javanica

Authors

  • Ruben M. Gapasin Associate Professor, Department of Plant Protection, Visayas State College of Agriculture, Baybay, Leyte, Philippines
  • Rodrigo B. Valdez Associate Professor, Department of Plant Protection, Visayas State College of Agriculture, Baybay, Leyte, Philippines
  • Evelyn Mae T. Mendoza and Associate Professors, Institute of Plant Breeding, College of Agriculture, University of the Philippines at Los Baños, College, Laguna, Philippines

Keywords:

Sweet potato
Meloidogyne incognita
M. javanica
Thin layer chromatography (TLC)
Chlorogenic acid
Scopoletin
Esculin
Phenolics

Abstract

The possible involvement of phenols in sweet potato resistance to root-knot nematode was shown by the reduced number of eggs hatched and high larval mortality of Meloidogyne incognita and M. javanica exposed to root extracts of the resistant cultivars even as low as 10% concentration. The com-pounds present in the extracts were heat resistant, of low molecular weight and water soluble.
Thin layer chromatography (TLC) revealed two distinct groups of blue fluorescent spots in susceptible and resistant sweet potato extracts with Rf values corresponding to chlorogenic acid, scopoletin and esculin. More phenolics accumulated in root extracts of resistant sweet potato cultivars following infec-tion as indicated by the stronger color intensity of the fluorescent spots.

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Submitted

2025-04-15

Published

1988-09-20

How to Cite

Gapasin, R. M., Valdez, R. B., & Mendoza, E. M. T. (1988). PHENOLICS INVOLVEMENT IN SWEET POTATO RESISTANCE TO Meloidogyne incognita AND M. javanica. Annals of Tropical Research, 10(2), 63–73. Retrieved from https://atr.vsu.edu.ph/article/view/641

Issue

Vol. 10 No. 2 (1988)

Section

Research Article

License

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