Genetic Variability in Phosphorus Responses of Rice Root Phenotypes

Rice

Table 4 The effects of genotype and phosphorus treatment on shoot and root morphological traits

	d.f.	Shoot biomass (g · plant⁻¹)		Plant height (cm)		Number of tillers (plant⁻¹)		Root dry weight (g · plant⁻¹)
		F	P	F	P	F	P	F	P
Genotype (G)	14	3.807	<0.001	25.907	<0.001	5.285	<0.001	5.684	<0.001
Treatment (P)	1	82.269	<0.001	9.979	0.002	33.657	<0.001	1.874	0.175
G * P	14	4.808	<0.001	0.910	0.553	7.660	<0.001	1.630	0.097
Treatments		Mean	SE	Mean	SE	Mean	SE	Mean	SE
HP		6.21	0.232	100.44	2.013	5.69	0.361	1.581	0.109
LP		3.61	0.169	91.47	2.006	3.37	0.169	1.343	0.135
Mean		4.91	0.199	95.96	1.491	4.53	0.233	1.462	0.087
	d.f	Root hair length (mm)		Root hair density (hairs · mm⁻²)		Nodal root number (plant⁻¹)		Root:shoot ratio
		F	P	F	P	F	P	F	P
Genotype (G)	14	7.202	<0.001	1.849	0.047	2.239	0.013	2.272	0.012
Treatment (P)	1	26.228	<0.001	47.354	<0.001	110.074	<0.001	14.060	<0.001
G * P	14	0.341	0.985	0.542	0.898	2.696	0.004	1.293	0.239
Treatments		Mean	SE	Mean	SE	Mean	SE	Mean	SE
HP		0.214	0.005	213.958	2.875	88.67	2.32	0.251	0.012
LP		0.251	0.005	238.051	1.998	58.71	1.66	0.355	0.025
Mean		0.232	0.004	226.005	2.159	73.69	2.13	0.303	0.015
	d.f	Small lateral root length (cm)		Large lateral root length (cm)		Lateral root density		Shoot P content (mg · plant⁻¹)
		F	P	F	P	F	P	F	P
Genotype (G)	14	4.491	<0.001	2.596	0.004	1.70	0.073	0.848	0.616
Treatment (P)	1	37.796	<0.001	67.354	<0.001	85.971	<0.001	142.801	<0.001
G * P	14	2.655	0.004	1.291	0.240	1.35	0.207	2.198	0.018
Treatments		Mean	SE	Mean	SE	Mean	SE	Mean	SE
HP		94.098	5.708	236.289	8.876	48.98	1.12	14.45	0.752
LP		48.537	4.727	140.640	7.553	36.49	0.75	4.59	0.341
Mean		71.318	4.405	188.465	7.699	42.73	0.94	9.52	0.664

Analysis of variance (ANOVA), means and standard error (SE) values are shown for 15 genotypes grown with high (100 μM; HP) or low phosphorus (2 μM; LP) treatments