Meristematic cell proliferation and ribosome biogenesis are decoupled in diamagnetically levitated Arabidopsis seedlings

Table 1 Summary of the changes observed in CYCB1:GUS seedlings exposed to levitation (0 g ) and hypergravity (2 g ) with respect to controls external (1 g ) and internal to the magnet (1 g *)

Parameter	No. days post germination	0 g*with respect to :		1 g* w.r.t. :	2 g*w.r.t. :
Parameter	No. days post germination	1 gctrl.	1 g* ctrl.	1 gctrl.	1 gctrl.	1 g* ctrl.
Seedling length	2 days	-	-	=	+ +	+ +
Cell proliferation rate		+ +	+	+	+	=
Ribosome biogenesis (Nucleolar size)		- -	- -	=	=	=
Ribosome biogenesis (Nucleolin level)		- -	- -	=	- -	-
Cyclin B1 expression		- -	-	-	=	+ +
Seedling length	4 days	+ +	+	+	+	=
Cell proliferation rate		+ +	+ +	=	=	=
Ribosome biogenesis (Nucleolar size)		- -	- -	=	-	=
Ribosome biogenesis (Nucleolin level)		- -	- -	=	-	=
Cyclin B1 expression		- -	-	-	- -	-

Statistically significant differences with respect to controls are indicated with ‘+’ (increase) or ‘–‘(decrease) when p < 0.05, and with ‘+ +’/’- -‘when p < 0.01. ‘=’ indicates an insignificant difference.