Table 2

Effect of shoot light exposure level on potential (P) and observed (O) bud fruitfulness.^a

	Thompson Seedless^b			Flame Seedless			Cabernet Sauvignon			Chardonnay
Exposure	P***^c	O***	O/P	P***	O**	O/P	P**	O^ns	O/P	P**	O^ns	O/P
^aInflorescence primordia per node for P and inflorescences per node for O.
^bMeans for nodes 5 to 15 in Thompson Seedless and nodes 1 to 3 in the other cultivars.
^cLight exposure treatment effects: , , **, and ns indicate significance at p > 0.05, 0.01, 0.001, and not significant, respectively.
High	1.79	1.59	0.89	2.61	1.97	0.76	3.56	1.40	0.39	3.22	2.03	0.63
Medium-high	1.42	1.27	0.89	1.44	1.42	0.98	3.20	1.62	0.51	3.03	1.84	0.61
Medium-low				1.14	1.12	0.98	2.14	1.4	0.65	2.54	2.00	0.79
Low	0.77	0.83	1.07	0.95	0.78	0.82	1.89	1.32	0.70	2.40	1.71	0.71