TY - JOUR
T1 - Intraspecific variation in aphid resistance and constitutive phenolics exhibited by the wild blueberry Vaccinium darrowi
AU - Ranger, C. M.
AU - Singh, A. P.
AU - Johnson-Cicalese, J.
AU - Polavarapu, S.
AU - Vorsa, N.
N1 - Funding Information:
Acknowledgments This paper is dedicated to Professor Sridhar Polavarapu (1961–2004), who served as Extension Entomologist for the Philip E. Marucci Center for Blueberry and Cranberry Research and Extension, Rutgers-The State University of New Jersey for 10 years. We thank Michael Reding (Horticultural Insects Research Lab, USDA-ARS, Wooster, OH) and Cesar Rodriguez-Saona (Marucci Center, Rutgers University, Chatsworth, NJ) for reviewing earlier drafts of this manuscript. This work was supported in part by USDA-CSREES 2005-34155-15749 and the New Jersey Agri. Exp. Station project # NJ31912.
PY - 2007/4
Y1 - 2007/4
N2 - Illinoia pepperi (MacGillivray) infests cultivated highbush blueberries, Vaccinium corymbosum L., in the Northeastern United States. Allopatric resistance to I. pepperi was examined in Vaccinium darrowi Camp, which evolved in the absence of I. pepperi in the Southeastern U.S. V. corymbosum cv. "Elliott", was used as a susceptible control. Between population variability in I. pepperi resistance was assessed by measuring length of the prereproductive period, fecundity, and survivorship on 14 V. darrowi accessions representing 11 discrete wild populations. Length of I. pepperi's prereproductive period and survivorship were not significantly affected. However, differences were detected in fecundity and the intrinsic rate of increase (r m ). Within population variability in resistance was measured by confining first instars to 24 accessions from a single wild population of V. darrowi (NJ88-06). Significant differences in the mean total number of aphids occurring after 20 d were only detected between 2 of the 24 V. darrowi accessions. A greater degree of diversity in I. pepperi resistance exists between populations of V. darrowi compared to within a population. Constitutive leaf and stem polyphenolics were identified by HPLC-MS and quantified from 14 of the V. darrowi accessions. The accessions varied in concentrations of five phenolic acids and seven flavonol glycosides, but a correlation was not found between individual or total phenolics and aphid performance. Overall, screening within and between populations of V. darrowi identified promising sources of aphid resistance, but phenolic acid and flavonol glycoside profiles did not predict resistance levels. The mechanism of resistance remains to be identified.
AB - Illinoia pepperi (MacGillivray) infests cultivated highbush blueberries, Vaccinium corymbosum L., in the Northeastern United States. Allopatric resistance to I. pepperi was examined in Vaccinium darrowi Camp, which evolved in the absence of I. pepperi in the Southeastern U.S. V. corymbosum cv. "Elliott", was used as a susceptible control. Between population variability in I. pepperi resistance was assessed by measuring length of the prereproductive period, fecundity, and survivorship on 14 V. darrowi accessions representing 11 discrete wild populations. Length of I. pepperi's prereproductive period and survivorship were not significantly affected. However, differences were detected in fecundity and the intrinsic rate of increase (r m ). Within population variability in resistance was measured by confining first instars to 24 accessions from a single wild population of V. darrowi (NJ88-06). Significant differences in the mean total number of aphids occurring after 20 d were only detected between 2 of the 24 V. darrowi accessions. A greater degree of diversity in I. pepperi resistance exists between populations of V. darrowi compared to within a population. Constitutive leaf and stem polyphenolics were identified by HPLC-MS and quantified from 14 of the V. darrowi accessions. The accessions varied in concentrations of five phenolic acids and seven flavonol glycosides, but a correlation was not found between individual or total phenolics and aphid performance. Overall, screening within and between populations of V. darrowi identified promising sources of aphid resistance, but phenolic acid and flavonol glycoside profiles did not predict resistance levels. The mechanism of resistance remains to be identified.
KW - Allopatric resistance
KW - Blueberry aphid
KW - Illinoia pepperi
KW - Metabolic profiling
KW - Vaccinium darrowi
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U2 - 10.1007/s10886-007-9258-5
DO - 10.1007/s10886-007-9258-5
M3 - Article
C2 - 17333374
AN - SCOPUS:33947508959
VL - 33
SP - 711
EP - 729
JO - Journal of Chemical Ecology
JF - Journal of Chemical Ecology
SN - 0098-0331
IS - 4
ER -