Behavioral studies have shown that aphid resistance in Lycopersicon pennellii (Corr.) D'Arcy is due to the presence of sugar esters in glandular exudate of the type IV trichomes. In this study, various methods for the estimation of epicuticular sugar ester concentrations were examined. There was a significant negative relationship between the concentration of sugar esters on the leaf and the level of potato aphid infestation in a segregating L. esculentum × L. pannellii F2 population. Selection for sugar ester accumulation should be an efficient selection technique for the aphid resistance of L. pennellii and other species that synthesize epicuticular sugar esters.
J.C. Goffreda, J.C. Steffens, and M.A. Mutschler
Wei Hai Yang, Chao Zhong Lu, Wei Chen, and Huan Yu Xu
higher ABA content in young than in mature leaves, affected differentially the ABA level of citrus leaves. In the fruitlets, peduncle girdling of grape clusters decreased ABA level but increased the physiologically inactive ABA-glucose ester ( Böttcher et
Shahzad M.A. Basra and Carol J. Lovatt
, respectively ( Yamaguchi, 2008 ). The growth inhibitor, ABA, was present, but at much lower concentrations than its inactive glucose ester or catabolites. The presence of ABA in the MLE clearly did not inhibit vegetative or reproductive growth of the tomato
Norman Q. Arancon, Archana Pant, Theodore Radovich, Nguyen V. Hue, Jesse K. Potter, and Chad E. Converse
-acetyl-aspartic acid, and N-indole-3-yl-acetyl-glutamic acid), abscisic acid, and metabolites ABA, phasic acid, dihydrophasic acid, 7-hydroxy-abscisic acid, neophasic acid abscisic acid glucose ester), cytokinins (isopentyladenine, isopentyladenosine, zeatin, zeatin