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The influence of agronomic factors on the visual quality of field-grown, minimally-processed lettuce
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Hilton, H. W., Clifford, S. C., Wurr, D. C. E. and Burton, Kerry S. (2009) The influence of agronomic factors on the visual quality of field-grown, minimally-processed lettuce. Journal of Horticultural Science & Biotechnology, Vol.84 (No.2). pp. 193-198. ISSN 1462-0316.
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Official URL: http://www.jhortscib.org/Vol84/84_2/14.htm
Abstract
The effects of nitrogen (N) application, irrigation method, stage of crop maturity, potassium:nitrogen (K:N) ratio, and calcium (Ca) application on post-harvest discolouration of cut Iceberg lettuce (Lactuca sativa cv. Saladin) were investigated in field experiments. Discolouration was scored to provide quantitative measures of both the "pinking" and "browning" of leaf tissue. The majority of the discolouration observed was "pinking" rather than "browning". The degree of "pinking" or "browning" was affected by the time of transplanting, but not by N application or by irrigation method. Effects of the K:N ratio on leaf discolouration were inconsistent, and can probably be discounted, but Ca application did appear to reduce discolouration at low K:N ratios. Increasing head maturity increased "pinking". It seems unlikely that agronomic factors have a major impact on the discolouration of cut lettuce. Parallels are drawn with DNA microarray experiments in Arabidopsis thaliana, where changes in the expression of genes encoding key enzymes involved in oxidative discolouration were induced more by environmental stresses than by agronomic factors.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | S Agriculture > SB Plant culture | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Warwick HRI (2004-2010) | ||||
| Journal or Publication Title: | Journal of Horticultural Science & Biotechnology | ||||
| Publisher: | Headley Bros. Ltd. | ||||
| ISSN: | 1462-0316 | ||||
| Official Date: | March 2009 | ||||
| Dates: |
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| Volume: | Vol.84 | ||||
| Number: | No.2 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | pp. 193-198 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | HortLINK Project HL0232 | ||||
| Grant number: | CSA4965 |
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