Please use this identifier to cite or link to this item: https://libjncir.jncasr.ac.in/xmlui/handle/10572/1356
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dc.contributor.advisorSharma, Vijay Kumaren_US
dc.contributor.authorNisha, N.K.en_US
dc.date.accessioned2013-07-28T13:05:32Zen_US
dc.date.available2013-07-28T13:05:32Zen_US
dc.date.issued2012en_US
dc.identifier.citationNisha, N.K. 2012, Evolution of precise circadian rhythms in fruit fly Drosophila melanogaster populations selected for adult emergence in a narrow window of time, Ph.D thesis, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluruen_US
dc.identifier.urihttps://libjncir.jncasr.ac.in/xmlui/10572/1356en_US
dc.descriptionOpen Accessen_US
dc.description.abstractOrganisms ranging from bacteria to mammals exhibit daily rhythms in various behavioural and physiological processes. These 24-hr rhythms are not mere passive responses to environmental cycles because they have been found to persist even under constant laboratory conditions, with near 24-hr period (from „circa‟ - about, „dies‟ - a day; hence circadian), which suggests the presence of endogenous rhythm generating systems (Dunlap et al., 2004). Endogenous, near 24-hr rhythms match their period and maintain a stable phase-relationship with daily environmental cycles through a process known as „entrainment‟, using environmental time-cues (zeitgebers) such as light, temperature, humidity, food availability, and social interaction cycles (Dunlap et al., 2004; Sharma and Chandrashekaran, 2005). The period of these rhythms is largely protected from changes in ambient conditions such as temperature, nutrition and pH, within physiological range, thus giving it a compensatory ability that allows organisms to maintain their rhythmic functions stably in the face of environmental fluctuations. It is thus believed that the ability of circadian timing systems to achieve temporal organization in behaviour and physiology has evolved as an adaptation to daily environmental changes arising due to the rotation of earth about its own axis (Pittendrigh, 1993; Sharma, 2003a; Dunlap et al., 2004). Further, it is believed that circadian clocks confer adaptive benefit to living organisms by timing their behavioural and physiological processes to appropriate time of the day so as to maintain coordination between internal rhythms and cyclic external environment (Pittendrigh, 1993; Sharma and Joshi, 2002; Sharma, 2003a; Dunlap et al., 2004).-
dc.language.isoEnglishen_US
dc.publisherJawaharlal Nehru Centre for Advanced Scientific Researchen_US
dc.rights© 2012 JNCASRen_US
dc.subjectDrosophila melanogasteren_US
dc.subjectCircadian rhythmsen_US
dc.titleEvolution of precise circadian rhythms in fruit fly Drosophila melanogaster populations selected for adult emergence in a narrow window of timeen_US
dc.typeThesisen_US
dc.type.qualificationlevelDoctoralen_US
dc.type.qualificationnamePh.D.en_US
dc.publisher.departmentEvolutionary and Organismal Biology Uniten_US
Appears in Collections:Student Theses (EIBU)

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