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Journal of Integrative Agriculture  2019, Vol. 18 Issue (5): 982-991    DOI: 10.1016/S2095-3119(18)61994-X
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Mulching with plastic film improved the root quality of summer-sown sweet potato (Ipomoea batatas (L). Lam.) in northern China
HOU Fu-yun*, DONG Shun-xu*, XIE Bei-tao, ZHANG Hai-yan, LI Ai-xian, WANG Qing-mei
Crop Research Institute, Shandong Academy of Agricultural Sciences/Scientific Observation and Experimental Station of Tuber and Root Crops in Huang-Huai-Hai Region, Ministry of Agriculture and Rural Affairs, Jinan 250100, P.R.China
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Abstract  
The root quality of sweet potato cultivated during the summer season is poor in northern China; thus, this study was conducted to determine whether root quality could be improved through mulching with plastic film (MPF).  The effect of MPF on root starch and its composition, the activity of starch synthesis enzymes, and other quality-related parameters were investigated in two purple flesh sweet potato cultivars, Jishu 18 and Ayamurasaki (Aya).  The results indicated that root dry matter, anthocyanin content, adenosine triphosphate (ATP), and starch content were higher in both cultivars under the MPF treatment than those under the control treatment.  The root adenosine diphosphate glucose pyrophosphorylase/uridine diphosphate glucose pyrophosphorylase (ADPGPPase/UDPGPPase) activity and adenosine triphosphatease (ATPase) activity were increased using MPF.  However, under the MPF treatment, the amylose content, soluble sugar content, and granule-bound synthase (GBSS) activity increased in Jishu 18 but decreased in Aya, and the amylopectin content, protein content, and soluble starch synthase (SSS) activity decreased in Jishu 18 but increased in Aya.  Therefore, MPF seems benifit to improve the quality of sweet potato, but the effects of this treatment condition may be dependent on the cultivar.
Keywords:  mulching with plastic film        summer-sown sweet potato        root quality        starch  
Received: 12 February 2018   Accepted:
Fund: This research was supported by the Natural Science Foundation of Shandong Province, China (ZR2014YL015), the Agricultural Seed of Shandong Province, China (2016LZGC005), the earmarked fund for China Agriculture Research System (CARS-10-B7 and CARS-10-B8), and the Youth Foundation of Shandong Academy of Agricultural Sciences, China (2014QNM31).
Corresponding Authors:  Correspondence WANG Qing-mei, Tel: +86-531-66655510, Fax: +86-531-66659088, E-mail: wang-qm@163.com    
About author:  HOU Fu-yun, E-mail: haier-fuyun@163.com;* These authors contributed equally to this study.

Cite this article: 

HOU Fu-yun, DONG Shun-xu, XIE Bei-tao, ZHANG Hai-yan, LI Ai-xian, WANG Qing-mei. 2019. Mulching with plastic film improved the root quality of summer-sown sweet potato (Ipomoea batatas (L). Lam.) in northern China. Journal of Integrative Agriculture, 18(5): 982-991.

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