Table 4.

Score for autofluorescence in the layer of sclerenchymatous fibre cells in rice roots when grown in aerated solution at high P (200 μm) and then transferred to aerated or stagnant nutrient solution at low (1·6 μm) or high P (200 μm) supply for 8 d

Distance of sections from the root apex (mm)	Score of autofluorescence of sclerenchymatous fibre cells in rice roots*
	Low P		High P
	Aerated	Stagnant	Aerated	Stagnant
10	1·00 ± 0·00	2·00 ± 0·00	1·00 ± 0·00	1·67 ± 0·33
20	1·33 ± 0·33	1·50 ± 0·41	1·33 ± 0·33	1·67 ± 0·33
70	2·00 ± 0·00	2·00 ± 0·00	1·33 ± 0·33	2·00 ± 0·00

Values are means of three replicates ± standard errors.

^*The relative intensity of autofluorescence of cell walls in the layer of sclerenchymatous fibres on the outer side of the root cortex was scored on a three-point scale: 0, when intensity of autofluorescence of the walls in the sclerenchymatous layers was equal to that of the cell layers on either side of it; 1, when intensity of autofluorescence was greater than that in cell walls of cell layers on either side of it and the thickness of the walls was equal to the walls of cell layers on either side of it; 2, when the intensity of autofluorescence was greater than those in cell walls of the cell layers on either side of it and had thicker walls than those of cell layers on either side of it.