FACTORS THAT INFLUENCE VOLATILE ESTER BIOSYNTHESIS IN €˜DELICIOUS’ APPLES

Effect of the use of anti‐hail nets on codling moth (Cydia pomonella) and organoleptic quality of apple (cv. Braeburn) grown in Alto Adige Region (northern Italy)

“…Shading treatments on fruits of a red pigmented apple cultivar significantly affected acetate esters and anthocyanin accumulation: at the lowest levels of light exposure, increasing amount of intercepted light was associated with enhanced accumulation of acetate esters and anthocyanins; whether at the highest levels of light exposure, and lowest levels of shading, increased amount of light corresponded to increased formation of anthocyanins, but to decreased ester formation. Conversely, the same shading treatments on fruits of another red‐pigmented cultivar little affected acetate ester formation . These findings, along with results from the present field experiment, suggested that the response of apple volatile formation to varying extent of shading of fruits on the tree or of whole trees is not straightforward and may significantly depend on the cultivar.…”

“…Results from previous field experiments, where reduction of exposure to sunlight was accomplished by shading fruit on the tree with shade cloth, did not show a clear relationship between the extent of fruit sunlight shading and acetate formation …”

“…Bosco et al reported a limited effect on sensory characteristics of ‘Royal Gala’ and ‘Suprema Fuji’ apple cultivars, but sensory analysis was carried out by non‐trained assessors and on a limited number of attributes. Shading apple fruits during maturation on the tree by shade cloth was reported to significantly affect volatile ester emissions in ripe fruit . Manipulation of sunlight availability during fruit development resulted in altered postharvest volatile production .…”

Study of the Early Events Leading to Cassava Root Postharvest Deterioration

“…POX Activity: Qualitative determination of peroxidase isozymes was performed using a method adapted from that of Miller et al (1998). 2 g (FW) of tissue sampled as described below was extracted with 4 mL 50 mM Tris buffer(pH 8.0) containing 2 mM sodium bisulfate and 2 mM dithiothreitol(DTT).…”

“…The procedures of Miller et al (1998), andWarren et al (2003) were used to purify and quantify cassava flavonoids and related phenolics. The extraction, purification, HPLC separation, and quantitation were modified from methods described by Macheix et al (1990).…”