Rootstock?conferred traits affect the water use efficiency of fruit production in Shiraz

Background and Aims Rootstock type can lead to differences in scion canopy growth fruit yield by conferring specific traits the scion. Conferred may interact alter relationship between vine water use yield, providing a mechanism whereby rootstocks could be used improve efficiency of production. This study aimed determine whether rootstock conferred vigour crop index (yield per unit transpired) were linked. Methods Results Seven genotypes, grafted with Shiraz, trial established over 20 years previously, assessed four seasons for vigour, leaf physiology, three whole transpiration using sapflow sensors. There consistent traits, being affected lesser extent than or use. Conclusions The production was improved Shiraz on low rootstocks, due combination effects gas exchange, yield. Significance Study has demonstrated that mature vineyard. Consequently, accurately matching irrigation application physiology chosen potential as tool optimise vineyard efficiency, even fully irrigated vineyards.