期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 64, 期 39, 页码 7394-7403出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b02534
关键词
mandarin; ethephon degreening oligochitosan; chitosan; 2,4-dichlorophenoxyacetic acid (2,4-D); calyx abscission
资金
- National Natural Science Foundation of China [31401540]
- Fundamental Research Funds for the Central Universities [SWU113047]
- Chongqing Postdoctoral Science Foundation [Xm2014106]
- Projects in the National Science & Technology Pillar Program [2015BAD16B07]
In the present study, we investigated whether the postharvest application of oligochitosan and chitosan could be used as potential alternatives to 2,4-dichlorophenoxyacetic acid (2,4-D) treatment to prevent calyx senescence of mandarin fruits induced by degreening treatment. The results of scanning electron microscopy indicated that the ethephon degreening treatment could accelerate the formation of pedicel abscission layers. Treatments with 15 g kg(-1) oligochitosan, 5 g chitosan, and 50 mg kg(-1) 2,4-D significantly suppressed the formation of pedicel abscission layers of ethephon degreening fruit and inhibited the browning of the calyx. These two treatments delayed the degradation of protopectin, cellulose, and lignin. Inhibition of the increase in the abscisic acid (ABA) content was also observed in these two treatments. In conclusion, these two treatments, particularly 15 g kg(-1) oligochitosan, could be potentially used as alternatives to 2,4-D to improve calyx alterations induced by the ethephon degreening treatment in mandarin fruits.
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