DOES CHRYSANTHEMUM DISPLAY AN ENDOGENOUS CIRCADIAN RHYTHM OF STEM ELONGATION?
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چکیده
منابع مشابه
Circadian rhythm of plasma melatonin in endogenous depression.
The circadian rhythm of plasma melatonin was investigated in normal men 18-30 years (N = 5), normal men 50-70 years (N = 5) and in six patients with endogenous depression. The environmental photoperiod was 11 hours. The subjects and patients were indoors with lights on from 07:00 until 23:00 hours. Blood samples were obtained every 4 hours over a 24 hour period, with additional sampling at 22:0...
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Background—The incidence of syncope exhibits a daily pattern with more occurrences in the morning, possibly as a result of influences from the endogenous circadian system and/or the daily pattern of behavioral/emotional stimuli. This study tested the hypothesis that the circadian system modulates cardiovascular responses to postural stress, leading to increased susceptibility to syncope at spec...
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There exists a robust day/night pattern in the incidence of adverse cardiac events with a peak at approximately 10 a.m. This peak traditionally has been attributed to day/night patterns in behaviors affecting cardiac function in vulnerable individuals. However, influences from the endogenous circadian pacemaker independent from behaviors may also affect cardiac control. Heartbeat dynamics under...
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The light dependence of D1 phosphorylation is unique to higher plants, being constitutive in cyanobacteria and algae. In a photoautotrophic higher plant, Spirodela oligorrhiza, grown in greenhouse conditions under natural diurnal cycles of solar irradiation, the ratio of phosphorylated versus total D1 protein (D1-P index: [D1-P]/[D1] + [D1-P]) of photosystem II is shown to undergo reproducible ...
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ژورنال
عنوان ژورنال: HortScience
سال: 1990
ISSN: 0018-5345
DOI: 10.21273/hortsci.25.9.1077