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Okanagan Valley and a location in the Creston Valley of British Columbia to represent a cross section of the British Columbia industry. Construction of temperature logging cherries . Blush sweet cherries (from an advanced stage selection, 13N-10-09, from

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Rain-induced cracking of sweet cherry (Prunus avium L.) fruit is thought to be related to water absorption through the fruit surface. Conductance for water uptake (gtot. uptake) through the fruit surface of `Sam' sweet cherry was studied gravimetrically by monitoring water penetration from a donor solution of deionized water through segments of the outer pericarp into a polyethyleneglycol (PEG) containing receiver solution. Segments consisting of cuticle plus five to eight cell layers of epidermal and hypodermal tissue were mounted in stainless steel diffusion cells. Conductance was calculated from flow rates of water across the segment and the difference in osmotic potential between donor and receiver solution. Flow rates were constant up to 12 hours and decreased thereafter. A log normal distribution of gtot. uptake was observed with a median of 0.97 × 10-7 m·s-1. Further, gtot. uptake was not affected by storage duration (up to 71 days) of fruit used as a source of segments, thickness of segments (range 0.1 to 4.8 mm), or segment area exposed in the diffusion cell. Osmolality of the receiver solution in the range from 1140 to 3400 mmol·kg-1 had no effect on gtot. uptake (1.45 ± 0.42 × 10-7 m·s-1), but gtot. uptake increased by 301% (4.37 ± 0.46 × 10-7 m·s-1) at 300 mmol·kg-1. gtot. uptake was highest in the stylar scar region of the fruit (1.44 ± 0.16 × 10-7 m·s-1) followed by cheek (1.02 ±0.21 × 10-7 m·s-1), suture (0.57 ±0.17 × 10-7 m·s-1) and pedicel cavity regions (0.22 ±0.09 × 10-7 m·s-1). Across regions, gtot. uptake was related positively to stomatal density. Extracting total cuticular wax by dipping fruit in chloroform/methanol increased gtot. uptake from 1.18 ± 0.23 × 10-7 m·s-1 to 2.58 ± 0.41 × 10-7 m·s-1, but removing epicuticular wax by cellulose acetate stripping had no effect (1.59 ± 0.28 × 10-7 m·s-1). Water flux increased with increasing temperature (range 20 to 45 °C). Conductance differed between cultivars with `Hedelfinger' sweet cherry having the highest gtot. uptake (2.81 ± 0.26 × 10-7 m·s-1), followed by `Namare' (2.68 ± 0.26 × 10-7 m·s-1), `Kordia' (0.96 ± 0.14 × 10-7 m·s-1), `Sam' (0.87 ± 0.15 × 10-7 m·s-1), and `Adriana' (0.33 ± 0.02 × 10-7 m·s-1). The diffusion cell system described herein may be useful in analyzing conductance in water uptake through the fruit surface of sweet cherry and its potential relevance for fruit cracking.

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were left to fruit naturally. On reengaging the project, individual logs were assessed to determine if forced fruiting was feasible. In Sept. 2017, logs were soaked in water for 24 h at ambient temperature, then stacked in a low-ground A-stack and left

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Sweet cherry ( Prunus avium ) trees are adapted to temperate climates that experience winters with sufficiently cold temperatures to satisfy plant chilling requirements and sufficiently warm summers to support fruit development ( Fadón et

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, standard sensor for air temperature measurement; Hycal Co., El Monte, CA; ± 0.1 °C for temperature) before they were used in the growth chambers. Readings from the sensors were logged with a CR21X data logger (Campbell Scientific Corporation, Edmonton

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Rain cracking is a problem for sweet cherry production in all countries where this very high-value crop is grown ( Christensen, 1996 ). Despite considerable research effort the mechanistic basis of the phenomenon is still poorly understood. The

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time course of release of biaxial strain ( ; percent) in exocarp segments excised from ‘Bing’ sweet cherry fruit as a function of the logarithm of time (log t; h). Fig. 4. ( A ) Effect of temperature on the release of biaxial elastic strain ( ) in

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linear or polynomial functions with nonzero y intercepts, power functions describing the relationship between denominators and numerators imply that a ratio is dependent on its denominator. The slope of a log–log plot (log 10 Y vs. log 10 M ) is

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Rain cracking severely limits sweet cherry production in all regions of the world where rainfall occurs immediately before and during the harvest period ( Christensen, 1996 ). Rain cracking is thought to be related to an excessively positive water

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photoperiod). On each bench, an enclosed thermocouple recorded air temperature every 30 s, and averages were logged every 15 min by a data logger (WatchDog Model 2475 Plant Growth Station; Spectrum Technologies, Inc., Aurora, IL). Line quantum sensors (SQ-316

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