A whole canopy gas exchange system for the targeted manipulation of grapevine source-sink relations using sub-ambient CO2

Table 1 Summary of reproductive and vegetative growth characteristics of three grapevines in each CO₂ supply treatment

	Harvest^a yield	Leaf area^b	Leaf area to fruit ratio	Pruning weight	Pruning weight ratio
	(kg vine⁻¹)	(m² vine^− 1)	(cm² g^− 1)	(kg vine^− 1)	Pruning weight ratio
Ambient	3.76	4.49	11.5	0.66	6.0
Sub-ambient	3.70	4.26	9.8	0.61	6.2
	ns	ns	ns	ns	ns

^aFebruary 2 ^b∑Leaf area (cm²) = 2.434 × L + 0.855 × L2, where L = leaf length (cm) measured January 9

ISSN: 1471-2229