Table 3.

Estimated quantile slopes (Coef.), their standard errors (s.e.) and P-values for genome size (1C value) and guanine–cytosine (GC) content regressed against plant (A) nitrogen (N), (B) phosphorus (P) and (C) N : P ratio.

Element	1C value (pg) [ln]			GC content (%)
	Coef.	s.e.	P-value	Coef.	s.e.	P-value
(a) N
q0.10	−0.41	0.080	0.001	−0.64	0.308	0.038
q0.25	−0.52	0.196	0.009			n.s.
q0.50			n.s.			n.s.
q0.75			n.s.			n.s.
q0.90			n.s.	−1.59	0.682	0.021
(B) P
q0.10			n.s.	−5.69	2.330	0.016
q0.25			n.s.			n.s.
q0.50			n.s.	−7.71	3.374	0.024
q0.75			n.s.			n.s.
q0.90			n.s.	−15.2	7.60	0.047
(C) N : P
q0.10	−0.05	0.022	0.039			n.s.
q0.25			n.s.			n.s.
q0.50			n.s.			n.s.
q0.75			n.s.			n.s.
q0.90			n.s.	0.65	0.299	0.032