scholarly journals Developmental and adult acclimation impact cold and drought survival of invasive tropical Drosophila kikkawai

Biology Open ◽  
2021 ◽  
Vol 10 (6) ◽  
Author(s):  
Ravi Parkash ◽  
Chanderkala Lambhod ◽  
Ankita Pathak
Keyword(s):  
Heat Resistance ◽  
Developmental Plasticity ◽  
Distribution Patterns ◽  
Resistance Level ◽  
Basal Resistance ◽  
Trade Off ◽  
Energy Metabolites ◽  
In The Wild ◽  
Drought Survival ◽  
Total Body

ABSTRACT Narrow distribution patterns of tropical Drosophila species are limited by lower resistance to cold or drought. In the invasive tropical Drosophila kikkawai, we tested whether developmental and adult acclimations at cooler temperatures could enhance its stress resistance level. Adult acclimation of winter collected body color morphs revealed a significant increase in the level of cold resistance. For light morph, its abundance during winter is not consistent with thermal-melanism hypothesis. However, higher cold acclimation capacity, as well as storage of energy metabolites could support its winter survival. In the wild-caught light and intermediate morphs, there is a lack of trade-off between cold and heat resistance but not in the case of dark morph. Developmental plasticity (15°C) resulted in the fivefold increase of cold survival at 0°C; and a twofold increase in desiccation resistance but a modest reduction (∼28–35%) in heat resistance as compared to morph strains reared at 25°C. Drought acclimation changes were significantly higher as compared with cold or heat pretreatment. We observed a trade-off between basal resistance and acclimation capacity for cold, heat, or drought resistance. For homeostatic energy balance, adult acclimation responses (cold versus drought; heat versus drought) caused compensatory plastic changes in the levels of proline or trehalose (shared patterns) but different patterns for total body lipids. In contrast, rapid cold or heat hardening-induced changes in energy metabolites were different as compared to acclimation. The ability of D. kikkawai to significantly increase stress tolerance through plasticity is likely to support its invasion potential.

scholarly journals Repeated stress exposure results in a survival–reproduction trade-off in Drosophila melanogaster

2009 ◽  
Vol 277 (1683) ◽  
pp. 963-969 ◽  
Author(s):  
Katie E. Marshall ◽  
Brent J. Sinclair
Keyword(s):  
Drosophila Melanogaster ◽  
Model Organism ◽  
Intrinsic Rate ◽  
Intrinsic Rate Of Increase ◽  
Stress Exposure ◽  
Trade Off ◽  
Repeated Stress ◽  
Rate Of Increase ◽  
In The Wild ◽  
Future Reproduction

While insect cold tolerance has been well studied, the vast majority of work has focused on the effects of a single cold exposure. However, many abiotic environmental stresses, including temperature, fluctuate within an organism's lifespan. Given that organisms may trade-off survival at the cost of future reproduction, we investigated the effects of multiple cold exposures on survival and fertility in the model organism Drosophila melanogaster . We found that multiple cold exposures significantly decreased mortality compared with the same length of exposure in a single sustained bout, but significantly decreased fecundity (as measured by r , the intrinsic rate of increase) as well, owing to a shift in sex ratio. This change was reflected in a long-term decrease in glycogen stores in multiply exposed flies, while a brief effect on triglyceride stores was observed, suggesting flies are reallocating energy stores. Given that many environments are not static, this trade-off indicates that investigating the effects of repeated stress exposure is important for understanding and predicting physiological responses in the wild.

Overcoming the trade-off between stretch formability and heat resistance in magnesium via alloying dilute neodymium

2021 ◽  
pp. 162666
Author(s):  
Sijia Hu ◽  
Qinghuan Huo ◽  
Chunyu Wang ◽  
Yuxiu Zhang ◽  
Zhirou Zhang ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Trade Off ◽  
Stretch Formability

scholarly journals Involvement of BGLU30 in Glucosinolate Catabolism in the Arabidopsis Leaf under Dark Conditions

2020 ◽  
Vol 61 (6) ◽  
pp. 1095-1106 ◽  
Author(s):  
Tomomi Morikawa-Ichinose ◽  
Daisuke Miura ◽  
Liu Zhang ◽  
Sun-Ju Kim ◽  
Akiko Maruyama-Nakashita
Keyword(s):  
Mass Spectrometry Imaging ◽  
Distribution Patterns ◽  
Growth Conditions ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Light Conditions ◽  
Wild Type ◽  
In The Wild ◽  
Unique Distribution ◽  
Dark Conditions

Abstract Glucosinolates (GSLs) are secondary metabolites that play important roles in plant defense and are suggested to act as storage compounds. Despite their important roles, metabolic dynamics of GSLs under various growth conditions remain poorly understood. To determine how light conditions influence the levels of different GSLs and their distribution in Arabidopsis leaves, we visualized the GSLs under different light conditions using matrix-assisted laser desorption/ionization mass spectrometry imaging. We observed the unique distribution patterns of each GSL in the inner regions of leaves and marked decreases under darkness, indicating light conditions influenced GSL metabolism. GSLs are hydrolyzed by a group of ß-glucosidase (BGLU) called myrosinase. Previous transcriptome data for GSL metabolism under light and dark conditions have revealed the highly induced expression of BGLU30, one of the putative myrosinases, which is also annotated as Dark INducible2, under darkness. Impairment of the darkness-induced GSL decrease in the disruption mutants of BGLU30, bglu30, indicated that BGLU30 mediated GSL hydrolysis under darkness. Based on the GSL profiles in the wild-type and bglu30 leaves under both conditions, short-chain GSLs were potentially preferable substrates for BGLU30. Our findings provide an effective way of visualizing GSL distribution in plants and highlighted the carbon storage GSL function.

Evidence for a possible fitness trade-off between insecticide resistance and the low temperature movement that is essential for survival of UK populations of Myzus persicae (Hemiptera: Aphididae)

1997 ◽  
Vol 87 (6) ◽  
pp. 573-579 ◽  
Author(s):  
S. P. Foster ◽  
R. Harrington ◽  
A. L. Devonshire ◽  
I. Denholm ◽  
S. J. Clark ◽  
...  
Keyword(s):  
Low Temperature ◽  
Insecticide Resistance ◽  
Myzus Persicae ◽  
Low Temperatures ◽  
Leaf Fall ◽  
Extreme Resistance ◽  
Resistance Level ◽  
Trade Off ◽  
Maladaptive Behaviour ◽  
Esterase Production

AbstractApterous aphids need to move from ageing to younger leaves in order to survive UK winters. This behaviour was studied at low temperatures in field and laboratory trials using Myzus persicae (Sulzer) clones representing all five recognized categories of esterase-based insecticide resistance found in UK populations. Both studies showed that the tendency of aphids to move from deteriorating leaves was inversely related to their insecticide resistance level. This maladaptive behaviour associated with greater insecticide resistance could lead to increased risks of aphids becoming separated from plants after leaf fall, and subsequent death from starvation when adverse cold and wet conditions prevent return. Revertant clones, that had spontaneously lost extreme resistance to insecticides by ceasing to express their amplified esterase genes, tended to show similar behaviour to aphids that had retained their high resistance phenotypes. This implies that rates of movement were not related directly to esterase production.

Speed and basal resistance level (BRL) in a segmented straight alley

1964 ◽  
Vol 14 (4) ◽  
pp. 499-505 ◽  
Author(s):  
Vincent Di Lollo ◽  
Edward L. Walker
Keyword(s):  
Straight Alley ◽  
Resistance Level ◽  
Basal Resistance

scholarly journals Environmental specificity in Drosophila-bacteria symbiosis affects host developmental plasticity

2019 ◽  
Author(s):  
Robin Guilhot ◽  
Antoine Rombaut ◽  
Anne Xuéreb ◽  
Kate Howell ◽  
Simon Fellous
Keyword(s):  
Developmental Plasticity ◽  
Laboratory Strain ◽  
Joint Analysis ◽  
Adult Size ◽  
Bacterial Strains ◽  
Local Conditions ◽  
Symbiotic Interactions ◽  
In The Wild ◽  
Microbial Symbionts ◽  
Host Evolution

ABSTRACTEnvironmentally acquired microbial symbionts could contribute to host adaptation to local conditions like vertically transmitted symbionts do. This scenario necessitates symbionts to have different effects in different environments. We investigated this idea in Drosophila melanogaster, a species which communities of bacterial symbionts vary greatly among environments. We isolated four bacterial strains isolated from the feces of a D. melanogaster laboratory strain and tested their effects in two conditions: the ancestral environment (i.e. the laboratory medium) and a new environment (i.e. fresh fruit with live yeast). All bacterial effects on larval and adult traits differed among environments, ranging from very beneficial to marginally deleterious. The joint analysis of larval development speed and adult size further shows bacteria affected developmental plasticity more than resource acquisition. This effect was largely driven by the contrasted effects of the bacteria in each environment. Our study illustrates that understanding D. melanogaster symbiotic interactions in the wild will necessitate working in ecologically realistic conditions. Besides, context-dependent effects of symbionts, and their influence on host developmental plasticity, shed light on how environmentally acquired symbionts may contribute to host evolution.

scholarly journals Individual differences in behaviour explain variation in survival: a meta-analysis

2019 ◽  
Author(s):  
Maria Moiron ◽  
Kate L. Laskowski ◽  
Petri Toivo Niemelä
Keyword(s):  
Individual Differences ◽  
Empirical Evidence ◽  
Meta Analysis ◽  
Animal Personality ◽  
Trade Off ◽  
Trade Offs ◽  
In The Wild ◽  
Behavioural Types ◽  
Risky Behaviours ◽  
First Time

Research focusing on among-individual differences in behaviour (“animal personality”) has been blooming for over a decade. One of the central theories explaining the maintenance of behavioural variation posits a trade-off between behaviour and survival with individuals expressing greater “risky” behaviours suffering higher mortality. Here, for the first time, we synthesize the existing empirical evidence for this key prediction. Our results did not support this prediction as there was no directional relationship between riskier behaviour and greater mortality; however there was a significant absolute relationship between behaviour and survival. In total, behaviour explained a significant, but small, portion (4.4%) of the variance in survival. We also found that risky (versus “shy”) behavioural types live longer in the wild, but not in the laboratory. This suggests that individuals expressing risky behaviours might be of overall higher quality but the lack of predation pressure and resource restrictions mask this effect in laboratory environments. Our work implies that individual differences in behaviour explain important differences in survival but not in the direction predicted by theory. Importantly, this suggests that the models predicting survival trade-offs may need revision and/or empiricists may need to reconsider their proxies of risky behaviours when testing such theory.

The Biology of Urban Environments

2018 ◽  
Author(s):  
Philip James
Keyword(s):  
Companion Animals ◽  
Distribution Patterns ◽  
Urban Environments ◽  
First Century ◽  
Temporal And Spatial Distribution ◽  
Early Twenty ◽  
In The Wild ◽  
Faunal Communities ◽  
Water And Soil Pollution ◽  
Micro Organisms

Urban environments are characterized by the density of buildings and elements of a number of infrastructures that support urban residents in their daily life. These built elements and the activities that take place within towns and cities create a distinctive climate and increase air, water, and soil pollution. Within this context the elements of the natural environment that either are residual areas representative of the pre-urbanized area or are created by people contain distinctive floral and faunal communities that do not exist in the wild. The diverse prions, viruses, micro-organisms, plants, and animals that live there for all or part of their life cycle and their relationships with each other and with humans are illustrated with examples of diseases, parasites, and pests. Plants and animals are found inside as well as outside buildings. The roles of plants inside buildings and of domestic and companion animals are evaluated. Temporal and spatial distribution patterns of plants and animals living outside buildings are set out and generalizations are drawn, while exceptions are also discussed. The strategies used and adaptions (genotypic, phenotypic, and behavioural) adopted by plants and animals in face of the challenges presented by urban environments are explained. The final two chapters contain discussions of the impacts of urban environments on human biology and how humans might change these environments in order to address the illnesses that are characteristic of urbanites in the early twenty-first century.

scholarly journals Low incubation temperature retards the development of cold tolerance in a precocial bird

2020 ◽  
pp. jeb.237743
Author(s):  
Andreas Nord ◽  
Jan-Åke Nilsson
Keyword(s):  
Body Temperature ◽  
Cooling Rate ◽  
Cold Tolerance ◽  
Japanese Quail ◽  
Incubation Temperature ◽  
Coturnix Japonica ◽  
Trade Off ◽  
In The Wild ◽  
Incubating Birds ◽  
Feeding Bout

Incubating birds trade off self-maintenance for keeping eggs warm. This causes lower incubation temperature in more challenging conditions, with consequences for a range of offspring traits. It is not yet clear how low developmental temperature affects cold tolerance early in life. This is ecologically important because before full thermoregulatory capacity is attained, precocial chicks must switch between foraging and being brooded when their body temperature declines. Hence, we studied how cold tolerance during conditions similar to a feeding bout in the wild was affected by incubation temperature in Japanese quail (Coturnix japonica). Cold-incubated (35.5°C) chicks took the longest to develop, hatched smaller, and remained smaller during their first week of life compared to chicks incubated at higher temperatures (37.0°C, 38.5°C). This was reflected in increased cooling rate and reduced homeothermy, probably on account of reductions in both heat-producing capacity and insulation. Lower cold tolerance could exacerbate other temperature-linked phenotypic effects and, hence, also the trade-off between future and current reproduction from the perspective of the incubating parent.

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