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Wang J.,Southwest University | Liu Y.,Chongqing University of Arts and Sciences | Liu Y.,Chongqing Engineering Research Center for Special Plant Seedlings | Zou M.,Southwest University
Chinese Journal of Environmental Engineering | Year: 2013

Some representative greenery species in Yongchuan were chosen to study the dust accumulation of unit area on the leaves of different plants in representative sites by direct measurement, and statistical analysis as well. The results showed that there were great differences in the dust accumulation capability of different test greenery species, L. chindensevar>Ophiopogon Japonicus>F. microcarpa>Photinia. s>Osmanthus fragrans>Camellia japonica>Ligustrum lucidum>Fatsia japonica>m. grandiflora>Pittosporum tobira>Michelia alba>Ilex purpurea Hassk>ginkgo>J. nudiflorum Lindl, from 2.0903 g/m2(J. nudiflorum Lindl) to 12.361 g/m2(L. chindensevar), with the maximum being 6 times more than the minimum. There are great differences in the dust accumulation capability of the same test greenery species in different urban areas, following the trend according to landuse the commercial and transport area microscopic scanning showed that different greenery species which had different leaf epidermal micro-configuration had different dust-retainning capability, the leaves had tomentum or evident>newly developing urban>the residential area>control area. The results of leaf surface electron ridge like rumple, their dust-retaining capability are stonger, the leaves have smooth or ceraceous surfaces, their dust-retaining capability are poor. The dust-retaining capability is bound up with the eare of unit leaf.


Liu Y.,Chongqing University of Arts and Sciences | Liu Y.,Chongqing Engineering Research Center for Special Plant Seedlings | Wisniewski M.,U.S. Department of Agriculture | Kennedy J.F.,Chembiotech Laboratories | And 6 more authors.
Carbohydrate Polymers | Year: 2016

The ability of chitosan and oligochitosan to enhance ginger (Zingiber officinale) resistance to rhizome rot caused by Fusarium oxysporum in storage was investigated. Both chitosan and oligochitosan at 1 and 5 g/L significantly inhibited rhizome rot, with the best control at 5 g/L. Chitosan and oligochitosan applied at 5 g/L also reduced weight loss, measured as a decrease in fresh weight, but did not affect soluble solids content or titratable acidity of rhizomes. The two compounds applied at 5 g/L induced β-1,3-glucanase and phenylalanine ammonia-lyase enzyme activity and the transcript levels of their coding genes, as well as the total phenolic compounds in rhizome tissues. Therefore, the ability of chitosan and oligochitosan to reduce rot in stored rhizomes may be associated with their ability to induce defense responses in ginger. These results have practical implications for the application of chitosan and oligochitosan to harvested ginger rhizomes to reduce postharvest losses. © 2016 Elsevier Ltd. All rights reserved.


Huang K.,Chongqing University of Arts and Sciences | Huang K.,Chongqing Engineering Research Center for Special Plant Seedlings | Zou Y.,Chongqing University of Arts and Sciences | Zou Y.,Chongqing Engineering Research Center for Special Plant Seedlings | And 4 more authors.
Environmental Science and Pollution Research | Year: 2015

Significant losses in harvested melon can be directly attributable to decay fungi. In the present study, the use of UV-C treatment combined with biocontrol yeast, Pichia cecembensis, was evaluated for their ability to control postharvest decay of melon fruits after they were artificially inoculated with Fusarium oxysporum and Alternaria alternata. Natural infection of fruit was also assessed. As a stand-alone treatment, UV-C or P. cecembensis significantly reduced Fusarium rot and Alternaria rot, and also the level of natural infection on melon fruit, relative to the untreated control. The combination of UV-C or P. cecembensis, however, provided a superior level of decay control on artificially inoculated and naturally infected fruit, compared to either treatment alone. None of the treatments impaired fruit quality. Integrating the use of UV-C treatment with biocontrol yeast has potential as an effective method to control postharvest decay of melon. © 2015, Springer-Verlag Berlin Heidelberg.

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