highly significantp < 0.001
Photosynthetic Response to Chloroplast CO 2 The fitting of the C3 photosynthesis model to the photosynthetic response to chloroplast CO 2 concentration of the control and treated Shiraz and Chardonnay vines ( Figure 3 ) was highly significant ( p < 0.001; r 2 = 0.95 − 0.98).