Summary
Increased methylation of middle lamellar pectin in plants hinders aphids in penetrating host-plant tissue. In sorghum, a new aphid biotype has overcome this host-plant barrier by having increased pectin methylesterase activity. Results suggest that resistance in crop-plants against sap-feeding insects may possibly be manipulated by altering middle lamellar chemistry either through breeding or use of certain plant-growth regulators.
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Dreyer, D.L., Campbell, B.C. Association of the degree of methylation of intercellular pectin with plant resistance to aphids and with induction of aphid biotypes. Experientia 40, 224–226 (1984). https://doi.org/10.1007/BF01963612
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DOI: https://doi.org/10.1007/BF01963612