Praying Cotyledons on Tomatoes

[333.okh]

Here is the deal I have started two tomatoes that every night the cotyledons raise straight up like they are praying The tomatoes are:

Minskly Rannij from Belarus
Sibirskiy Skorospelyi from Siberia

both seed stocks came from Wintersown.org

Is this common?

[dhrtx]

Very common, they just fold up like they are chasing the disappearing light, then open to greet the morning. It seems that the true leaves sometimes do the same thing for a while as well, maybe only size makes it stop.

[333.okh]

These are the first one I have had do this. I love it.

[333.okh]

oh, also, does anyone have any experience or knowledge of these types? They are early <68 day Determinate?