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Photoperiod

photoperiod

(Science: ecology) Recurring cycle of light and dark periods. The natural photoperiod is approximately 24 hours, and the ratio of light to dark hours slowly changes over the course of a year. In controlled experiments, the photoperiod is usually (but not necessarily) retained at 24 hours, and the light:dark ratio is typically constant. The amount of hours in a day where the environment is either light or dark.


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Investigation into aspect of plant physiology

Well turns out the photoperiod thing can’t be done since the school can’t get the equipment needed. So that leaves me back at square one with no ideas. I really just can’t think of anything to do for this silly thing! Any ideas would ...

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by Lysis
Tue Feb 14, 2012 7:47 am
 
Forum: Botany Discussion
Topic: Investigation into aspect of plant physiology
Replies: 6
Views: 3092

Re:

Just take some room, where you're sure nobody's going too often and which has no windows (or you can seal them), put in light with timing. The photoperiodism requires at least 12 hours long periods anyway... Hello, thank you for the reply So if I was doing photoperiodism would my research question ...

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by Lysis
Mon Feb 13, 2012 10:48 am
 
Forum: Botany Discussion
Topic: Investigation into aspect of plant physiology
Replies: 6
Views: 3092

LDP & SDP's graph

it does not have long photoperiod. Imagine, the day (light) could be long e.g. only 5 hours and it would be fine, but longer than 15 hours would be inhibitory. On the other hand - long day plants require at least 12 hours, so it can ...

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by JackBean
Thu Jun 17, 2010 9:45 pm
 
Forum: Botany Discussion
Topic: LDP & SDP's graph
Replies: 5
Views: 4180

Re: LDP & SDP's graph

Apparently now, the short day plant has a photoperiod of less than 15 hours for the plants to flower. So it is that!! :D Apparently, it was confusing that the short day plant actually has a long photoperiod, but is considered a short day plant ...

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by fastsandslash
Wed Jun 16, 2010 8:40 am
 
Forum: Botany Discussion
Topic: LDP & SDP's graph
Replies: 5
Views: 4180

Re: LDP & SDP's graph

I didn't. I would have thought the photoperiod would be less than 15 hrs. The teachers, said it is actually a photoperiod of 9 hours, because it needs less than 9 hrs photoperiod? Ok... so photoperiod is the length of day for LDP, and photoperiod ...

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by fastsandslash
Sun Jun 13, 2010 10:44 pm
 
Forum: Botany Discussion
Topic: LDP & SDP's graph
Replies: 5
Views: 4180
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