Physiological and Agronomical Responses of ‘Vairo’ Almond and ‘Big Top’ Nectarine Cultivars Grafted onto Different Prunus Rootstocks and Grown under Semiarid Mediterranean Conditions

Two trials were conducted under Mediterranean conditions to monitor several physiological indicators before harvest (leaf chlorophyll concentration, quantum yield of photosystem II electron transport, stem water potential, and stomatal conductance) some agronomic performance parameters at (vigor, fruit growth, size, weight, yield), ‘Vairo’ almond ‘Big Top’ nectarine cultivars grafted onto eight Prunus rootstocks, six which are common in both cultivars. For cultivars, factors including rootstock, date, the interaction between rootstock from set evaluated. Significantly affected certain agronomical traits evaluated harvest, with potential being parameter by In fact, presented low levels Rootpac-20 high Rootpac-40 for With regard other during growing period, changes conductance observed ‘Vairo’, but not Top’. Comparing rootstocks throughout season, IRTA-1 exhibited highest values, whereas lowest was Rootpac-R; Ishtara also values. Regarding GF-677 produced yields cultivar, performed better cultivar.