Stomatal conductance is mainly influenced by abiotic stress, in
particular water stress; gs also depends on the water status in
the plant and, therefore, could influence water use efficiency. In
our study, the average WUE (mol CO2mmol H2O−1
) (Table 5) was
lower in the organic than the conventional system in each year of
cultivation (3.30 vs. 4.05 and 4.24 vs. 5.11) and, considering the
average of 2 years data, it was 17.8% lower. The effects of year and
cropping system had a significant influence on WUE. Most cultivars did not differ for WUE in terms of management system, in
both years, apart from Regent and Augurio, that showed higher
values in conventional system in 2010. When the six cultivars were analyzed per system, Alican and Regent had the highest value in the
conventional system in 2011
Stomatal conductance is mainly influenced by abiotic stress, inparticular water stress; gs also depends on the water status inthe plant and, therefore, could influence water use efficiency. Inour study, the average WUE (mol CO2mmol H2O−1) (Table 5) waslower in the organic than the conventional system in each year ofcultivation (3.30 vs. 4.05 and 4.24 vs. 5.11) and, considering theaverage of 2 years data, it was 17.8% lower. The effects of year andcropping system had a significant influence on WUE. Most cultivars did not differ for WUE in terms of management system, inboth years, apart from Regent and Augurio, that showed highervalues in conventional system in 2010. When the six cultivars were analyzed per system, Alican and Regent had the highest value in theconventional system in 2011
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