Table 2.

Leaf anatomical features in different rice varieties

Variety	N	LMA	LD	LT	VTmajor	VTminor	%epidermis	%mesophyll	%vascular	IVD	VLA
		(g m–2)	(mg mm–3)	(mm)	(mm)	(mm)				(mm)	(mm mm–2)
Sufficient N (SN)
I90	SN	26·9	0·039	0·234	0·173	0·087	17·4	50·6	32·1	0·178	4·45
I08	SN	39·9	0·115	0·216	0·123	0·094	7·3	66·4	26·3	0·197	4·90
Ruf	SN	33·4	0·069	0·176	0·158	0·111	20·8	53·6	25·6	0·178	4·44
Aus	SN	38·6	0·088	0·200	0·191	0·152	13·0	66·3	20·7	0·188	3·95
Lat	SN	45·3	0·120	0·271	0·255	0·156	5·8	68·2	26·0	0·280	3·50
Nip	SN	40·8	0·136	0·257	0·205	0·080	16·0	62·7	21·3	0·245	2·98
SY	SN	36·1	0·133	0·228	0·223	0·103	24·1	47·2	29·7	0·196	3·91
HHZ	SN	43·8	0·153	0·294	0·251	0·108	13·3	64·0	22·7	0·261	4·23
N22	SN	40·5	0·132	0·265	0·208	0·084	16·7	62·0	21·3	0·234	5·64
GY	SN	43·2	0·144	0·204	0·211	0·086	19·3	58·7	22·0	0·208	4·12
ZS	SN	42·9	0·140	0·205	0·184	0·089	10·7	65·0	24·3	0·210	3·99
Low N (LN)
HHZ	LN	51·4	0·173	0·306	0·265	0·116	11·0	64·0	25·0	0·221	4·48
N22	LN	34·8	0·113	0·191	0·148	0·084	15·3	63·0	21·7	0·212	6·02
GY	LN	41·7	0·137	0·206	0·195	0·092	8·0	65·3	26·7	0·195	4·20
ZS	LN	42·2	0·140	0·213	0·193	0·090	12·1	63·2	24·7	0·196	4·17
ANOVA
	V	***	***	**	**	***	***	*	*	**	***
	N	**	**	*	*	ns	***	*	**	***	***
	V × N	***	**	**	*	ns	*	*	**	**	**

n = 3 plants.

V, variety; N, nitrogen; SN, sufficient N treatment; LN, low N treatment; LMA, leaf mass per area; LT, leaf thickness; VT_major, major vein thickness; VT_minor, minor vein thickness; LD, leaf density; %_epidermis, percentage of epidermis area at leaf cross-section; %_mesophyll, percentage of mesophyll tissue area at leaf cross-section; %_vascular, percentage of vascular tissue area at leaf cross-section; IVD, intervein distance; VLA, leaf vein length per area.

*P < 0·05; **P < 0·01; ***P < 0·001; ns (non-significant), P > 0·05.