Quoted by @saswathy679
13 December 2020 [CUBE Chatshaala.]
Discussed about model system FRUIT FLIES feeding habit of Drosophila.
Peoples from Cochin college 7/12/2020 - 10/12/2020 started to observing flies which are present in the banana (Activity pattern of fruit flies)
They made a setup 3 bottles same hight and added banana in to the 3 bottles (Kept in same area - Kitchen ). And observing the flies which are present in the bottles at 2 hour interval. Their graph shows 2 different time they got peak of flies 11:00am: 30 flies, 3:00pm: 20 flies shows in graph.This study was done in December.The same study earlier done in August month. Also get same peak at 1:00pm & 8:00pm. So there is difference coming from time period. This study was done in August.
Why the Peak difference came August/December graph same study ?
•December have short day length & long night period.
•August have long Day length & short night period.
May be it will effect flies number variation at different time. But the pattern is almost same in both same study done in Fruit Flies.
Hypothetical graph made based on expectations. If we keep the same
3 banana bottles different area of house like
kitchen Garbage Bin, Garden, Window side expecting number flies will varies in each 3 bottles but
pattern will same.
•Graph of Fruit Flies Activity Pattern .
•Graph of Phyllanthus Sleep Wake Cycle.
Discussed about model system
PHYLLANTHUS plants photos from different parts of country, People are working in this simple model system, studies
sleep & wake time of plant. There is a photo came from
@KiranyadavR mam Moradabad(UP) observed something interesting that phyllanthus plant are still not completely closed their leafs after the sunset.
Why ?
Is there any internal clock controlling their body mechanisms ?
1.What do we mean by internal clock?
2.Negative Feedback: what does it do?
"…It is less obvious that most organisms have the innate ability to measure time. Indeed, most organisms do not simply respond to sunrise but, rather, anticipate the dawn and adjust their biology accordingly. When deprived of exogenous time cues, many of these diurnal rhythms persist, indicating their generation by an endogenous biological circadian clock.
"http://www.plantcell.org/content/18/4/792
When deprived of exogenous time cues, many of these diurnal rhythms persist, indicating their generation by an endogenous biological circadian clock. Plant Circadian Rhythms
C. Robertson McClung
Published April 2006http://www.plantcell.org/content/18/4/792