Postharvest Quality of Cut Roses Following Electron-beam Irradiation

Cut Rosa ×hybrida L. `Royalty' flowers were used to determine the efficacy of electron-beam irradiation for increasing postharvest quality and decreasing petal infection by Botrytis cinerea Pers. In an experiment for determining the injury threshold, roses received electron-beam irradiation of 0, 0.5, 1, 2, and 4 kGy. Irradiation dosages ≥1 kGy caused necrosis on petal tissue and decreased postharvest life at 20 °C. In a second experiment to evaluate postharvest quality, roses were irradiated at 0, 0.25, 0.5, 0.75, and 1 kGy. Dosages of 0.25 and 0.5 kGy slowed the rate of flower bud opening for 2 days but did not decrease postharvest quality when compared with nonirradiated roses. Roses that received irradiation dosages of 0.75 and 1 kGy showed unacceptable quality. In a third experiment, roses that had or had not been inoculated with B. cinerea were irradiated at 0, 0.25, 0.5, and 0.75 kGy. Irradiation did not control B. cinerea populations, and rose quality decreased as dosage increased. In a fourth experiment to determine the effect of irradiation on B. cinerea, conidia on water-agar plates exposed to dosages ≤1, 2, and 4 kGy germinated at rates of ≈90%, 33%, and 2%, respectively, within 24 h.

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Botryis-induced Postharvest Losses of Cut Roses May be Reduced by Electron-bean Irradiation

HortScience ◽

10.21273/hortsci.30.4.835e ◽

1995 ◽

Vol 30 (4) ◽

pp. 835E-835

Author(s):

Ai-Yu Chang ◽

Mark L. Gleason ◽

Nancy H. Agnew ◽

Dennis G. Olson ◽

Richard T. Gladon

Keyword(s):

Electron Beam ◽

Botrytis Cinerea ◽

Untreated Control ◽

Electron Beam Irradiation ◽

Postharvest Quality ◽

Beam Irradiation ◽

Flower Bud ◽

Postharvest Life ◽

Rose Petal ◽

Bud Opening

Irradiated cut Rosa × hybrida `Royalty' flowers were used to determine the efficacy of electron-beam irradiation for extending flower postharvest life by reducing native and inoculated populations of Botrytis cinerea. In preliminary experiments, roses received irradiation dosages of 0.00, 0.50,1.00, 2.00, and 4.00 kilogray (kGy), along with an untreated control, to establish killing dosages. Irradiation dosages of 1.00 kGy or greater irreversibly damaged rose petal tissue. In subsequent experiments, roses irradiated at dosages of 0.00, 0.25, 0.50, 0.75, and 1.00 kGy, and an untreated control, were used for evaluating postharvest events. We have found that irradiation dosages of 0.25 and 0.50 kGy slowed the rate of flower bud opening slightly and did not decrease postharvest quality or longevity. Inoculated and uninoculated roses irradiated at 0.00, 0.25, 0.50, and 0.75 kGy were used to determine if electron-beam irradiation could reduce Botrytis infection and proliferation during postharvest storage, and these results also will be presented.

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Improvement of Shelf Life and Postharvest Quality of White Button Mushroom by Electron Beam Irradiation

Journal of Food Processing and Preservation ◽

10.1111/jfpp.12129 ◽

2013 ◽

Vol 38 (4) ◽

pp. 1673-1681 ◽

Cited By ~ 6

Author(s):

Yaqvob Mami ◽

Gholamali Peyvast ◽

Farhood Ziaie ◽

Mahmood Ghasemnezhad ◽

Vahid Salmanpour

Keyword(s):

Electron Beam ◽

Shelf Life ◽

Electron Beam Irradiation ◽

Postharvest Quality ◽

Beam Irradiation ◽

Button Mushroom ◽

White Button Mushroom

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Control of Botrytis cinerea and Postharvest Quality of Cut Roses by Electron Beam Irradiation

Korean Journal of Horticultural Science and Technology ◽

10.7235/hort.2014.14021 ◽

2014 ◽

Vol 32 (4) ◽

pp. 507-516

Author(s):

Song Kwon ◽

Gyung Ja Choi ◽

Ki Sun Kim ◽

Hye Jin Kwon

Keyword(s):

Electron Beam ◽

Botrytis Cinerea ◽

Electron Beam Irradiation ◽

Postharvest Quality ◽

Beam Irradiation

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Methods to Monitor and Improve the Performance of Specimen Holders for Transmission Electron Cryomicroscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100164738 ◽

1996 ◽

Vol 54 ◽

pp. 454-455

Author(s):

B. L. Armbruster ◽

B. Kraus ◽

M. Pan

Keyword(s):

Electron Microscopy ◽

Electron Beam ◽

Electron Beam Irradiation ◽

Beam Irradiation ◽

Quality Of Data ◽

Electron Cryomicroscopy ◽

Thermal Equilibration ◽

Transmission Electron ◽

Electron Microscopes

One goal in electron microscopy of biological specimens is to improve the quality of data to equal the resolution capabilities of modem transmission electron microscopes. Radiation damage and beam- induced movement caused by charging of the sample, low image contrast at high resolution, and sensitivity to external vibration and drift in side entry specimen holders limit the effective resolution one can achieve. Several methods have been developed to address these limitations: cryomethods are widely employed to preserve and stabilize specimens against some of the adverse effects of the vacuum and electron beam irradiation, spot-scan imaging reduces charging and associated beam-induced movement, and energy-filtered imaging removes the “fog” caused by inelastic scattering of electrons which is particularly pronounced in thick specimens.Although most cryoholders can easily achieve a 3.4Å resolution specification, information perpendicular to the goniometer axis may be degraded due to vibration. Absolute drift after mechanical and thermal equilibration as well as drift after movement of a holder may cause loss of resolution in any direction.

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Gibberellin4+7, Benzyladenine, and Supplemental Light Improve Postharvest Leaf and Flower Quality of Cold-stored `Stargazer' Hybrid Lilies

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.123.4.563 ◽

1998 ◽

Vol 123 (4) ◽

pp. 563-568 ◽

Cited By ~ 22

Author(s):

Anil P. Ranwala ◽

William B. Miller

Keyword(s):

Cold Storage ◽

Storage Temperature ◽

Postharvest Quality ◽

Flower Longevity ◽

Flower Bud ◽

Leaf Injury ◽

Leaf Chlorosis ◽

Bud Opening ◽

Flower Quality

Experiments were conducted to evaluate storage temperature, storage irradiance and prestorage foliar sprays of gibberellin, cytokinin or both on postharvest quality of Oriental hybrid lilies (Lilium sp. `Stargazer'). Cold storage of puffy bud stage plants at 4, 7, or 10 °C in dark for 2 weeks induced leaf chlorosis within 4 days in a simulated consumer environment, and resulted in 60% leaf chlorosis and 40% leaf abscission by 20 days. Cold storage also reduced the duration to flower bud opening (days from the end of cold storage till the last flower bud opened), inflorescence and flower longevity, and increased flower bud abortion. Storage at 1 °C resulted in severe leaf injury and 100% bud abortion. Providing light up to 40 μmol·m-2·s-1 during cold storage at 4 °C significantly delayed leaf chlorosis and abscission and increased the duration of flower bud opening, inflorescence and flower longevity, and reduced bud abortion. Application of hormone sprays before cold storage affected leaf and flower quality. ProVide (100 mg·L-1 GA4+7) and Promalin (100 mg·L-1 each GA4+7 and benzyladenine (BA)) effectively prevented leaf chlorosis and abscission at 4 °C while ProGibb (100 mg·L-1 GA3) and ABG-3062 (100 mg·L-1 BA) did not. Accel (10 mg·L-1 GA4+7 and 100 mg·L-1 BA) showed intermediate effects on leaf chlorosis. Flower longevity was increased and bud abortion was prevented by all hormone formulations except ProGibb. The combination of light (40 μmol·m-2·s-1) and Promalin (100 mg·L-1 each GA4+7 and BA) completely prevented cold storage induced leaf chlorosis and abscission.

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