The PRD technique was originally conceived as a means of
reducing vine vigour and the reduction in shoot growth and
increase light entering the bunch zone. It was also found that
yield was maintained and fruit quality was either unchanged
or improved in the first work reporting the effects of PRD on
wine grapes in Australia (Dry et al., 1996). Most earlier studies
of APRI on wine grape in Mediterranean region had a positive
effect of APRI on stomatal conductance, water use efficiency