Arid
DOI10.1016/j.cbpa.2013.05.012
Rapid effects of humidity acclimation on stress resistance in Drosophila melanogaster
Aggarwal, Dau Dayal1,2; Ranga, Poonam2; Kalra, Bhawna3; Parkash, Ravi2; Rashkovetsky, Eugenia1; Bantis, Leonidas E.4
通讯作者Aggarwal, Dau Dayal
来源期刊COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
ISSN1095-6433
EISSN1531-4332
出版年2013
卷号166期号:1页码:81-90
英文摘要

We tested the hypothesis whether developmental acclimation at ecologically relevant humidity regimes (40% and 75% RH) affects desiccation resistance of pre-adults (3rd instar larvae) and adults of Drosophila melanogaster Meigen (Diptera: Drosophilidae). Additionally, we untangled whether drought (40% RH) acclimation affects cold-tolerance in the adults of D. melanogaster. We observed that low humidity (40% RH) acclimated individuals survived significantly longer (1.6-fold) under lethal levels of desiccation stress (0-5% RH) than their counter-replicates acclimated at 75% RH. In contrast to a faster duration of development of 1st and 2nd instar larvae, 3rd instar larvae showed a delayed development at 40% RH as compared to their counterparts grown at 75% RH. Rearing to low humidity conferred an increase in bulk water, hemolymph content and dehydration tolerance, consistent with increase in desiccation resistance for replicates grown at 40% as compared to their counterparts at 75% RH. Further, we found a trade-off between the levels of carbohydrates and body lipid reserves at 40% and 75% RH. Higher levels of carbohydrates sustained longer survival under desiccation stress for individuals developed at 40% RH than their congeners at 75% RH. However, the rate of carbohydrate utilization did not differ between the individuals reared at these contrasting humidity regimes. Interestingly, our results of accelerated failure time (AFT) models showed substantial decreased death rates at a series of low temperatures (0, -2, or -4 degrees C) for replicates acclimated at 40% RH as compared to their counter-parts at 75% RH. Therefore, our findings indicate that development to low humidity conditions constrained on multiple physiological mechanisms of water-balance, and conferred cross-tolerance towards desiccation and cold stress in D. melanogaster. Finally, we suggest that the ability of generalist Drosophila species to tolerate fluctuations in humidity might aid in their existence and abundance under expected changes in moisture level in course of global climate change. (C) 2013 Elsevier Inc. All rights reserved.


英文关键词Developmental acclimation at 40% and 75% RH Desiccation resistance Cold tolerance Duration of development Carbohydrate content D. melanogaster
类型Article
语种英语
国家Israel ; India ; Greece
收录类别SCI-E
WOS记录号WOS:000322693200011
WOS关键词DESICCATION-RESISTANCE ; WATER-BALANCE ; COLD-HARDINESS ; DROUGHT ACCLIMATION ; CLIMATIC SELECTION ; STARVATION RESISTANCE ; LARVAL DEVELOPMENT ; ENERGY-METABOLISM ; DESERT DROSOPHILA ; EASTERN AUSTRALIA
WOS类目Biochemistry & Molecular Biology ; Physiology ; Zoology
WOS研究方向Biochemistry & Molecular Biology ; Physiology ; Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176493
作者单位1.Univ Haifa, Inst Evolut, IL-31999 Haifa, Israel;
2.Maharshi Dayanand Univ, Dept Genet, Rohtak 124001, Haryana, India;
3.Univ Haifa, Dept Biol, IL-36006 Tivon, Israel;
4.Univ Aegean, Dept Stat & Actuarial Financial Math, Samos 83200, Greece
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Aggarwal, Dau Dayal,Ranga, Poonam,Kalra, Bhawna,et al. Rapid effects of humidity acclimation on stress resistance in Drosophila melanogaster[J],2013,166(1):81-90.
APA Aggarwal, Dau Dayal,Ranga, Poonam,Kalra, Bhawna,Parkash, Ravi,Rashkovetsky, Eugenia,&Bantis, Leonidas E..(2013).Rapid effects of humidity acclimation on stress resistance in Drosophila melanogaster.COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY,166(1),81-90.
MLA Aggarwal, Dau Dayal,et al."Rapid effects of humidity acclimation on stress resistance in Drosophila melanogaster".COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY 166.1(2013):81-90.
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