Table 2.

Photosynthetic and respiration rate of stem cross-sections inserted into the IRGA assimilation chamber.

Organ	PPFD (μmol m−2 s−1)	PN
		(μmol m−2 s−1)	(μmol (g Chl)−1 s−1)
Leaf	1500	9.9 ± 1.2	15.1 ± 0.3
Stem	1500	10.0 ± 0.2	9.1 ± 1.9
Leaf	0	−1.5 ± 0.2	−2.3 ± 0.3
Stem	0	0.5 ± 0.2	4.7 ± 1.3

Values are mean ± SE (n = 6). Incident photosynthetic photon flux density is indicated.