Day length

Pierre Lejeune plejeune at
Wed Sep 20 01:48:28 EST 1995

In article <43k1rt$k9f at> RATCLIFF <FRANK.RATCLIFF at> writes:
>Newsgroups: bionet.genome.arabidopsis
>Subject: Day length
>Date: 18 Sep 1995 16:05:33 +0100
>Lines: 9
>Sender: lpddist at
>Distribution: bionet
>Message-ID: <43k1rt$k9f at>
>Sensitivity: Company-Confidential
>Original-To: arab-gen at (Non Receipt Notification Requested)

>I am trying to grow Columbia without them flowering, at least with 
>delayed flowering. Can anybody tell me the daylength at which 
>flowering is inducded?

>Thank you 

>Frank Ratcliff

>Ratcliff at

dear frank,

Arabidopsis is a quantitative long day plant, which means that flowering is 
only DELAYED in short days. If you want to grow your plants vegetative for a 
long period (2-3 months) try short days (8 h) at low irradiance (100 
microEinstein or less). But remember, the plant WILL flower in the end.

Pierre Lejeune - Université de Liège - Belgium

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