. 2009 May 19;104(2):307–314. doi: 10.1093/aob/mcp121

Table 2.

Leaf biomass, chlorophyll fluorescence, gas exchange, chlorophyll, nitrogen and carbon concentration, and photosynthetic nitrogen use efficiency in old lamina carrying the pitcher

	Lamina		Pitcher
Parameter	Unfed	Fed	Unfed	Fed
Leaf dry weight (mg)	104·7 ± 15·8	120·5 ± 19·6^ns	141·3 ± 5·2^††	199·5 ± 47·8^{ns ††}
R_D (μmol CO₂ m⁻² s⁻¹)	0·97 ± 0·02	1·15 ± 0·06^ns	0·43 ± 0·02^††	0·60 ± 0·1^{ns ††}
R_D (nmol CO₂ g⁻¹ d. wt s⁻¹)	5·8 ± 0·5	7·0 ± 0·21^ns	6·5 ± 0·4^††	9·6 ± 1·7 ^{ns ††}
A_Nmax (μmol CO₂ m⁻² s⁻¹)	3·1 ± 0·3	6·0 ± 0·5**	0·10 ± 0·04^††	0·15 ± 0·03^{ns ††}
A_Nmax (nmol CO₂ g⁻¹ d. wt s⁻¹)	19·4 ± 2·0	37·8 ± 5·4*	2·0 ± 0·9^††	3·5 ± 1·4^{ns ††}
g_s (mmol m⁻² s⁻¹)	57·0 ± 6·4	92·7 ± 4·6**	37·7 ± 4·4^††	31·3 ± 1·6^{ns ††}
F_v/F_m	0·770 ± 0·010	0·823 ± 0·011*	0·715 ± 0·012^†	0·740 ± 0·008^{ns ††}
Φ_PSII	0·41 ± 0·02	0·59 ± 0·02**	0·18 ± 0·01^††	0·16 ± 0·01^{ns ††}
Φ_CO2 (mol CO₂ mol quanta⁻¹)	0·011 ± 0·002	0·021 ± 0·001**	0·001 ± 0·000^††	0·001 ± 0·000^{ns ††}
QP	0·73 ± 0·02	0·82 ± 0·01**	0·34 ± 0·04^††	0·25 ± 0·03^{ns ††}
NPQ	1·64 ± 0·14	0·79 ± 0·03**	1·66 ± 0·14^ns	0·68 ± 0·14** ^ns
C (mg g⁻¹ d. wt)	464·2 ± 1·9	477·5 ± 5·8*	457·1 ± 0·9^††	462·2 ± 1·2* ^††
N (mg g⁻¹ d. wt)	11·3 ± 0·4	20·0 ± 2·8*	7·8 ± 0·2^††	17·0 ± 1·5** ^†
PNUE (μmol CO₂ mol N⁻¹ s⁻¹)	20·7 ± 1·5	24·8 ± 4·1^ns	4·4 ± 1·2^††	2·7 ± 0·8^{ns ††}
Chl a + b (mg g⁻¹ d. wt)	1·30 ± 0·01	2·51 ± 0·34**	0·93 ± 0·09^††	1·02 ± 0·05^{ns ††}
Chl a/b	1·94 ± 0·02	2·15 ± 0·06** ^††	0·96 ± 0·04	1·45 ± 0·07** ^††

See Appendix for definitions. Values shown are means ± s.e., n = 5. Comparisons were made (t-test) between fed and unfed lamina or pitcher at *P < 0·05, **P < 0·01, and between fed pitcher and fed lamina or unfed pitcher and unfed lamina respectively at ^†P < 0·05, ^††P < 0·01 (paired t-test); ns, non-significant differences.