Dictionary » P » Pfr

Pfr

Pfr

The form of phytochrome that absorbs light in the far red region, 730nm and is thus converted to pr. It slowly and spontaneously converts to Pr in the dark.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Problem understanding result of lighting regime-phytochrome

Sort of get it now- the key was that the flash of 'light' which interrupts the nights, is RED light not DAYLIGHT- therefore the conversion into Pfr is very rapid.In contrast accumulation of Pfr in daylight is much slower as there is far red light too which makes the net accumulation smaller. I ...

See entire post
by ADAS137
Sun Jan 15, 2012 9:42 am
 
Forum: Botany Discussion
Topic: Problem understanding result of lighting regime-phytochrome
Replies: 13
Views: 5883

Re: Re:

... is length of dark ;) I don't get why people keep saying that! I guess because it's true :lol: I don't think it's about the stability of Pr or Pfr, but rather of the florigen, which is accumulated.

See entire post
by JackBean
Thu Dec 15, 2011 3:34 pm
 
Forum: Botany Discussion
Topic: Problem understanding result of lighting regime-phytochrome
Replies: 13
Views: 5883

Problem understanding result of lighting regime-phytochrome

How much faster is the conversion of Pr--->Pfr during the day, than the conversion of Pfr---->Pr during the night? Could you please explain regime 3 and regime 4, step by step in terms of phytochrome and hence flowering?!

See entire post
by ADAS137
Thu Dec 15, 2011 2:49 pm
 
Forum: Botany Discussion
Topic: Problem understanding result of lighting regime-phytochrome
Replies: 13
Views: 5883

The Fiber Disease

... today (back two pages) on the termite..... well,here is some news on that..... Thermo Trilogy Corporation has received a federal registration for PFR-97 20WDG (Paecilomyces fumosoroseus Apopka Strain 97) for use on ornamentals, non-food crops in greenhouses, and interiorscapes to manage whiteflies, ...

See entire post
by London
Sun Jul 16, 2006 12:30 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5428638


This page was last modified 21:16, 3 October 2005. This page has been accessed 2,394 times. 
What links here | Related changes | Permanent link