Variation in thermal tolerance is linked to phosphoglucose isomerase genotype in a montane leaf beetle

Functional Ecology - Tập 17 Số 2 - Trang 213-221 - 2003
G. Neargarder, Elizabeth P. Dahlhoff, Nathan E. Rank

Tóm tắt

SummarySierra Nevada populations of the Willow BeetleChrysomela aeneicollis(Schaeffer) experience extreme elevated and subzero temperatures in nature. In these populations, frequencies of phosphoglucose isomerase (PGI) alleles vary with latitude and altitude and respond to climate change. PGI genotypes differ in expression of a stress‐inducible heat shock protein (Hsp70).Here, differences in tolerance of elevated and subzero extreme temperatures were compared for field‐acclimatized and laboratory‐acclimated larvae and adults possessing three common PGI genotypes (PGI 1–1, 1–4 and 4–4). Three indices of thermal tolerance were measured – CTmax, LT50and Hsp70 expression level.Thermal tolerance depended on life stage, prior exposure to sublethal stress and PGI genotype. Larvae were generally less tolerant of thermal extremes than adults. For both adults and larvae, prior exposure to sublethal temperatures increased survival after exposure to subsequent stress. Survival after exposure to thermal extremes was consistently related to PGI genotype (1–1 > 1–4 > 4–4), as were expression levels of Hsp70 (1–1 > 1–4 > 4–4).These results suggest that PGI genotypes differ in tolerance of thermal extremes routinely experienced by beetles in nature. A trade‐off between thermal tolerance and energy allocation may explain the persistence of the PGI polymorphism.

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Tài liệu tham khảo

Christensen R., 1997, Log‐linear Models and Logistic Regression

10.1046/j.1365-2435.1998.00246.x

10.1073/pnas.160277697

10.1242/jeb.185.1.151

Dahlhoff E.P., 1991, Temperature effects on mitochondria from hydrothermal vent invertebrates: evidence for adaptation to elevated and variable habitat temperature, Physiological Zoology, 64, 1490, 10.1086/physzool.64.6.30158226

10.14430/arctic1312

10.1126/science.1876847

10.1093/icb/39.6.857

10.1146/annurev.physiol.61.1.243

Feder M.E., 1993, Genes in Ecology, 177

10.1101/gad.6.8.1402

10.1111/j.1558-5646.1992.tb01999.x

10.1002/jez.1402270305

Hoffmann A.A., 1991, Evolutionary Genetics and Environmental Stress.

10.1111/j.1558-5646.1991.tb04343.x

10.1073/pnas.92.7.2602

10.1017/CBO9780511721854

Katz L.A., 1997, Balancing selection on electrophoretic variation of phosphoglucose isomerase in two species of field cricket: Gryllus veletis and G. pennsylvanicus, Genetics, 147, 609, 10.1093/genetics/147.2.609

10.1242/jeb.204.9.1659

10.1073/pnas.77.9.5385

10.1093/icb/39.6.910

10.1111/j.1558-5646.1997.tb02398.x

10.1379/1466-1268(1997)002<0060:DCOHOI>2.3.CO;2

10.1016/S0022-1910(98)00059-6

10.1023/A:1002701420091

10.1139/z97-783

Mitton J.B., 1997, Selection in Natural Populations, 10.1093/oso/9780195063523.001.0001

Murphy R.W., 1990, Molecular Systematics, 45

10.1111/j.1558-5646.1992.tb00622.x

10.1007/BF00317324

10.1111/j.0014-3820.2002.tb00151.x

10.1016/0011-2240(81)90090-0

SAS, 1988, SAS/STAT Guide for Personal Computers, Version 6·03 Edition.

10.1098/rspb.2000.1012

10.1111/j.0014-3820.2001.tb00656.x

10.1017/CBO9780511721854.004

10.1111/j.1601-5223.1999.00155.x

10.1046/j.1365-2435.2001.00525.x

10.1093/genetics/87.1.177

10.1093/genetics/103.4.691

10.1073/pnas.89.22.10608

10.1093/genetics/103.4.725

10.1016/S0022-1910(01)00095-6

Zera A.J., 1987, Temperature‐dependent kinetic variation among phosphoglucose isomerase allozymes from the wing‐polymorphic water strider Limnoporus canaliculatus, Molecular Biology and Evolution, 4, 266

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Functional Ecology

Tập 17 Số 2

213-221

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