Geographical variation in egg cold hardiness: a study on the adaptation strategies of the migratory locust <i>Locusta migratoria</i> L.

Jing, Xin; Kang, Le

doi:10.1046/j.1365-2311.2003.00497.x

Cited by 55 publications

(61 citation statements)

References 23 publications

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“…A maximum variation in SCPs of 10°C was observed between geographic populations of the leafminer pupae, which is a rare record for insects (Turnock et al, 1998;Shintani and Ishikawa, 1999;Klok et al, 2003;Chen and Kang, 2004). The northern populations are commonly more cold-tolerant than southern populations, so as to adapt to local environmental stress through evolutionary pathways or natural selection (Masaki, 1996;Jing and Kang, 2003;Chen and Kang, 2004;Kimura, 2004). For L. sativae, the southernmost population had the highest mean SCP value.…”

Section: Discussionmentioning

confidence: 99%

Implication of pupal cold tolerance for the northern over-wintering range limit of the leafminer Liriomyza sativae (Diptera: Agromyzidae) in China

Chen

Kang

2005

Appl. Entomol. Zool.

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This study investigated the cold tolerance of a laboratory-reared population and latitude-separated populations of the leafminer Liriomyza sativae in China in terms of low-temperature survival rate and supercooling capacity. Pupae of the laboratory-reared population are susceptible to freezing temperatures. The supercooling point of the pupae varied at a maximum of up to 10°C among the geographic populations. Both acclimation of the pupae at 5 and 10°C significantly increased the cold survival rate of laboratory-reared and field-collected populations. But the field population had a more active response to the same acclimation regime. Combining the experimental data with previous field investigations, the Ϫ2°C isotherm of the minimum mean temperature of January was proposed as the leafminer's overwintering range limit. Meanwhile, with the widespread availability of greenhouses as a source of re-infestation in northern China, the leafminer's natural border of distribution should be determined by the minimum temperature in warm seasons. Our results suggest that biologically similar Liriomyza species may cope with the intensifying cold stress along the latitude by adopting a mixed cold-tolerance strategy, which is closely associated with the greenhouse microhabitats. The physiologically based modeling of the over-wintering limit provides a tool for guiding the management for greenhouse pests and predicting the source of pest infestation.

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Section: Discussionmentioning

confidence: 99%

Implication of pupal cold tolerance for the northern over-wintering range limit of the leafminer Liriomyza sativae (Diptera: Agromyzidae) in China

Chen

Kang

2005

Appl. Entomol. Zool.

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“…Many studies have reported that populations at high latitude have higher cold resistances than at low latitude, and temperate species are more cold tolerant than subtropical or tropical species (Hoffmann et al 2003;Jing and Kang 2003;Kimura 2004). For the southern populations of L. sativae, the mean SCP of pupae was substantially depressed with decreasing latitude.…”

Section: Discussionmentioning

confidence: 95%

Can greenhouses eliminate the development of cold resistance of the leafminers?

Chen

Kang

2005

Oecologia

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Latitudinal patterns for quantitative traits in insect are commonly used to investigate climatic adaptation. We compare the cold resistance of the leafminer (Liriomyza sativae) pupa among populations distributed from tropical to temperate regions, incorporating the thermal overwintering limit of the insect's range. The patterns of cold resistance for northern and southern populations differ. The southern populations significantly increased their cold resistance with latitude, showing a latitudinal pattern independent of seasons, acclimation regimes, and assay methods. In contrast, the northern populations showed no stable patterns; they were always intermediate in cold hardiness between the low-latitude and high-latitude populations within the overwintering limit. Integration of these data with those of the biologically similar congeneric leafminer, L. huidobrensis, suggests that a pattern shift in stress tolerance associated with the overwintering range limit is probably a general adaptive strategy adopted by freeze-intolerant species that have a high-latitude boundary of distribution, but can only overwinter and develop in protected greenhouses in harsh seasons. Considering the widespread availability of greenhouses for overwintering insects in northern China, we speculated that the large-scale existence of thermally-buffered microhabitats in greenhouses might eliminate the development of cold resistance of the leafminer populations. However, results suggest a strong selection for increased cold resistance for natural populations of Liriomyza species at higher latitudes that can overwinter in the field, but not for populations at latitudes above the thermal limit. Thus, habitat modification associated with greenhouses can limit gene flow and reduce cold tolerances even at latitudes above where the leafminers can overwinter in the field.

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“…It corresponds to the onset of a sharp rebound on the thermal curve due to the release of the latent heat of ice crystallization. The SCPs of the individuals at different developmental stages were measured using the method described by Jing and Kang [8]. Numbers of assayed individuals of eggs, larvae, pupae and adults were 20, 100, 20 and 30, respectively.…”

Section: Measurement Of Supercooling Points (Scps)mentioning

confidence: 99%

Cold hardiness as a factor for assessing the potential distribution of the Japanese pine sawyerMonochamus alternatus(Coleoptera: Cerambycidae) in China

Hao

Kong

et al. 2006

Ann. For. Sci.

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-To assess cold tolerance as a factor for potential distribution of Monochamus alternatus, parameters of cold hardiness and acclimation responses of the beetle were examined. Supercooling points (SCPs) of eggs, larvae, pupae, and adults were significantly different, the eggs having the lowest value (-19.8 • C) and the adults the highest (-6.6 • C). No significant differences were observed between the SCPs of pupae and overwintering 5th instar larvae, but mean SCPs significantly declined with the development of larval instars. Mortality of overwintering larvae increased as temperature declined and exposure to low temperatures was prolonged. No individual survived at -25 • C. Lethal times of Lt 50 and Lt 95 were 35.8 d and 65.4 d at -10 • C, respectively. Acclimation significantly improved cold tolerance of autumn 4-5th instar larvae, but not of overwintering larvae. Based on these results, the -10 • C January mean air temperature isotherm is suggested as the northern limit of the beetle potential distribution in China.Monochamus alternatus / cold tolerance / acclimation / distribution limit / isotherm Résumé -La résistance au froid comme facteur pour évaluer la distribution potentielle du scieur de pin japonais Monochamus alternatus (Coleoptera : Cerambycidae) en Chine. Afin d'estimer la résistance au froid et les capacités de dispersion de Monochamus alternatus, nous avons étudié les réponses de ce coléoptère à la rigueur hivernale, avec ou sans acclimatation. La valeur moyenne du point de super-congélation (SCP) est sensiblement différente entre les oeufs, les larves, les chrysalides, et les adultes, les oeufs présentant la valeur la plus basse (-19.8 • C) et les adultes la plus élevée (-6.6 • C). Bien que cette valeur moyenne de SCP ait progressivement diminué au fur et à mesure du développement larvaire, aucune différence significative n'a été observée entre les larves hivernantes de 5 e stade et les chrysalides. La mortalité des larves hivernantes augmente avec la diminution de la température et avec la durée d'exposition aux basses températures. Aucun oeuf, larve, chrysalide ou adulte ont survécu à une exposition à -25 • C. Pour une température de -10 • C, la durée létale d'exposition a été établie à 35.8 d (Lt 50 ) et 65.4 d (Lt 95 ). L'acclimatation préalable a augmenté de manière significative la tolérance au froid des larves de 4 e et 5 e stades présentes en automne, mais pas celle des larves hivernantes. L'isotherme -10 • C pour la température moyenne de l'air en janvier a été proposé comme limite septentrionale de la distribution de coléoptère en Chine.Monochamus alternatus / tolérance au froid acclimatation / limite de distribution / isotherme

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Geographical variation in egg cold hardiness: a study on the adaptation strategies of the migratory locust Locusta migratoria L.

Cited by 55 publications

References 23 publications

Implication of pupal cold tolerance for the northern over-wintering range limit of the leafminer Liriomyza sativae (Diptera: Agromyzidae) in China

Implication of pupal cold tolerance for the northern over-wintering range limit of the leafminer Liriomyza sativae (Diptera: Agromyzidae) in China

Can greenhouses eliminate the development of cold resistance of the leafminers?

Cold hardiness as a factor for assessing the potential distribution of the Japanese pine sawyerMonochamus alternatus(Coleoptera: Cerambycidae) in China

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