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Valeria Sigal Escalada and Douglas D. Archbold

treatments at H2 (AVG and AVG plus 1-MCP). Fruit were ripened at 21 °C for 7 d after postharvest treatment or were stored in cold storage for 6 or 12 weeks at 4 °C and later ripened at 21 °C for 7 d. Internal ethylene concentration. Internal ethylene

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Gregory M. Peck, Ian A. Merwin, Christopher B. Watkins, Kathryn W. Chapman, and Olga I. Padilla-Zakour

each year. At each harvest, a 10-fruit subsample was selected from each plot for measurements of percent surface blush, internal ethylene concentration (IEC), flesh firmness, SSC, starch index rating, and TA. Comparisons of sensory, mineral

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Jinwook Lee, James P. Mattheis, and David R. Rudell

. Measurements were conducted before and after storage on the same fruit. The difference calculation was based on values at harvest and those after storage. Internal ethylene concentration in a 0.5-mL gas sample taken from the core cavity was analyzed using a

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Kathleen Delate, Andrea McKern, Robert Turnbull, James T.S. Walker, Richard Volz, Allan White, Vincent Bus, Dave Rogers, Lyn Cole, Natalie How, Sarah Guernsey, and Jason Johnston

. Internal ethylene concentration was determined by injecting a 1-mL core cavity sample into a gas chromatograph (Hewlett Packard, 5890 series II) equipped with an injector at 160 °C, an activated alumina F1 column (Alltech; glass, 1.5 m × 6 mm × 2 mm; mesh

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Don C. Elfving, Stephen R. Drake, A. Nathan Reed, and Dwayne B. Visser

before applications and again after each weekly drop count. Parameters of fruit quality [flesh firmness, skin color, flesh color, soluble solids content (SSC), titratable acidity (TA), starch index (SI), and internal ethylene concentration (IEC)] were

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Christopher B. Watkins and Jacqueline F. Nock

Orchard 1 only with no other main effects or interactions being detected, whereas TA was affected by treatment only in Orchard 2. Differences were small, however. The SSC was unaffected by atmosphere or treatment. Table 5. Internal ethylene concentration

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Corina Serban, Lee Kalcsits, Jennifer DeEll, and James P. Mattheis

. Mean fruit firmness, soluble solids content (SSC), titratable acidity (TA), and internal ethylene concentrations (IEC) after 4 mo. of storage for two lots from two production seasons (C, D) of ‘Honeycrisp’ apples from Washington State and one lot (E

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Jennifer R. DeEll, Jennifer T. Ayres, and Dennis P. Murr

evaluated on a scale of 1 to 9 points using starch charts ( Chu and Wilson, 2000a , b ). Internal ethylene concentration (IEC) was determined at harvest, after 14 d at 22 °C, and after each storage treatment combination. A 3-mL gas sample was withdrawn from

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D.R. Rudell, D.S. Mattinson, J.K. Fellman, and J.P. Mattheis

`Fuji' apple (Malus ×domestica Borkh.) fruits were harvested periodically prior to and during fruit ripening. Ethylene evolution and respiration rates of skin, hypanthial, and carpellary tissue was determined in each fruit. Additionally, whole fruits were used for analyses of internal ethylene concentration, volatile evolution, starch content, flesh firmness, and soluble solids content. Ethylene production was greatest in the carpellary tissue at all sampling dates except the one occurring just before the rise in whole fruit internal ethylene concentration, when production in the skin and carpellary tissue was similar. Respiration was always highest in the skin, in which the climacteric rise was most drastic. Higher ethylene production in the carpellary tissue of pre- and postclimacteric fruit and higher respiration in the skin tissue, including a noticeable climacteric rise, is indicative of a ripening initiation signal originating and/or transduced through the carpels to the rest of the fruit.

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Martin J. Bukovac, Paolo Sabbatini, and Philip G. Schwallier

The effect of ethephon on flowering and cropping of strongly alternate bearing spur-type `Delicious' apple (Malus domestica Borkh.) was evaluated in a 6-year study. Ethephon (200 mg·L–1), applied at 3, 3 + 6, and 3 + 6 + 9 weeks after full bloom in “on years,” increased flowering in “off years” by 33% and reduced flowering in “on years” by 17% compared with the control. The mean yield per tree for ethephon-treated trees over three “on years” and three “off years” was almost identical to that of the controls (82 vs. 80 kg/tree). However, the distribution of yield between “on” and “off” years was changed, 24% greater in “off years” and 10% less in “on years.” Ethephon reduced both the variation in yield, particularly in “off years,” and the magnitude of alternation. Ethephon had a direct effect on flower initiation because 1) it did not reduce shoot growth or yield in the “on years” (years of ethephon application) and 2) ethephon-treated trees initiated more flowers per kilogram of fruit produced than did the controls. The additional flowers initiated were functional because the amount of fruit produced per unit bloom density did not differ between control and ethephon-treated trees. Harvest maturity indices, namely internal ethylene concentration, firmness, starch index, soluble solids, and color, were not significantly affected, although internal ethylene concentration and starch index tended to be higher in fruit from treated trees.