Hayward kiwifruits and Plant Growth Regulators: Detection and effects in post-harvest studied by Magnetic Resonance Imaging and Scanning Electron Microscopy
| Autor: | S. Cozzolino, Massimiliano Valentini, Mena Ritota, G. Ceredi, Anna Taglienti, Caterina Cafiero, Paolo Sequi |
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| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Pore size Plant growth Controlled atmosphere medicine.diagnostic_test Scanning electron microscope fungi food and beverages Ripening Magnetic resonance imaging General Medicine Analytical Chemistry chemistry.chemical_compound Nuclear magnetic resonance chemistry Auxin Cytokinin Biophysics medicine Food Science |
| Zdroj: | Food Chemistry. 126:731-736 |
| ISSN: | 0308-8146 |
| Popis: | We used Magnetic Resonance Imaging spectroscopy to reveal the use of two Plant Growth Regulators (PGRs), i.e. cytokinin and auxin, on Hayward kiwifruits, at any stage of cultivation, and post-harvest ripening and storage. The internal morphology was non-destructively determined in order to depict structural features related to hormones treatments and we found that T 2 -weighted MRI images showed different internal tissue organisations depending upon the use and the type of PGR. Transverse relaxation times allowed the recognition of cytokinin-treated samples, whilst image analysis was used to identify auxin-treated kiwifruits. We also exploited the post-harvest conditions, i.e. normal refrigeration and controlled atmosphere, on PGRs treated kiwifruits, and found that auxin shortened the shelf-life, with normal refrigeration exerting a stronger effect. The kiwifruit pulp was also investigated by means of Scanning Electron Microscopy, highlighting significant differences at a cellular level amongst treatments, in terms of pore size and vacuoles number, both probably playing a fundamental role in the evaporation activity. |
| Databáze: | OpenAIRE |
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