VIP: Light

Photoperiodism

Summer Conditions (June 21)
16hr8hr
SDP e.g.:_______________
 
LDP e.g.:_______________
 
Winter Conditions (December 21)
8hr16hr
   
Night Interruption (White Light)
8hr8hr10s8hr
   
Daytime Interruption (Darkness)
8hr10s8hr8hr
   

Notice it is the length of the ___________ that is measured!!

What pigment senses the night interruption? _______________________________

Control (No Interruption)
8hr16hr
SDP
 
LDP
 
Red Light (______nm) Interruption (10 sec)
8hr8hr R 8hr
   
Far-Red Light (______nm) Interruption (10 sec)
8hr8hrFR8hr
   
Sequences Ending in Red
8hr8hr R-FR-R 8hr
   
Sequences Ending in Far-Red
8hr8hrFR-R-FR8hr
   

Where to plant Chrysanthemums: _________________________________________________

Best time to plant Lettuce: __________________________________

SDP(LNP?): Tuber formation in Potato, Jerusalem Artichoke, Dahlia

LDP: Onion bulb formation

Onion Variety (critical PP)In CTIn TX
Bermuda (11+ hr/day)  
Spanish (15+ hr/day)  

Artificial Light: Duration______hr/day     Intensity/Color:____________________________

This page © Ross E. Koning 1994.

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