Light effects on plants

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• NİHAL TÜRKMEN EROL

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The presence of melatonin in plants is universal. Evidence has confirmed that a major portion of the melatonin is synthesized by plants themselves even though a homologue of the classic arylalkylamine N-acetyltransferase (AANAT) has not been identified as yet in plants. Thus, the serotonin N-acetylating enzyme in plan…

The circadian timing system is composed of molecular clocks, which drive 24-h changes in xenobiotic metabolism and detoxification, cell cycle events, DNA repair, apoptosis, and angiogenesis. The cellular circadian clocks are coordinated by endogenous physiological rhythms, so that they tick in synchrony in the host ti…

Melatonin (N-acetyl-5-methoxytryptamine) has been detected in a number of plant species. Indeed, there exists evidence that this classically-considered animal indole is actually both synthesized in and taken up by plants. Among the actions that melatonin may carry out in plant tissues, its role as an antioxidant or gr…

Mammalian cells possess a cell-autonomous molecular clock which controls the timing of many biochemical reactions and hence the cellular response to environmental stimuli including genotoxic stress. The clock consists of an autoregulatory transcription-translation feedback loop made up of four genes/proteins, BMal1, C…

• NURİ ÖZTÜRK

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• MUSTAFA ERKAN

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• VURAL GÖKMEN

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• HÜLYA TÜRK

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• ÖKKEŞ ATICI

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• MUCİP GENİŞEL

It is commonly thought that disruption of the circadian clock increases the cancer incidence in humans and mice. However, it was found that disruption of the clock by the Cryptochrome (Cry) mutation in mice did not increase cancer rate in the mutant mice even after exposing the animals to ionizing radiation. Therefore…

• NURİ ÖZTÜRK