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Acta Prataculturae Sinica ›› 2014, Vol. 23 ›› Issue (1): 149-157.DOI: 10.11686/cyxb20140118

• Orignal Article • Previous Articles     Next Articles

The effect of defloration on dry matter and sugar accumulation and their distribution profiles in Jerusalem artichoke

LI Hui1,2,XU Huan-huan1,2,ZHAO Geng-mao1,2,LIANG Ming-xiang1,2   

  1. 1.College of Resources and Environmental Science,Nanjing Agriculture University,Nanjing 210095,China;
    2.Jiangsu Province Key Laboratory of Marine Biology,Nanjing 210095,China
  • Received:2013-02-26 Online:2014-02-20 Published:2014-02-20

Abstract: The effects of flower removal on biomass change and distribution profiles of sugar in Jerusalem artichoke (Helianthus tuberosus ‘Qingyu No.2’) were studied to provide theoretical support for the utilization of Jerusalem artichoke and further gene regulation in flowering. Leaves mainly accumulated reducing sugar while tubers and stems mainly accumulated non-reducing sugar. Total biomass of Qingyu No.2 in the flowering period reached a maximum and then the aboveground biomass started to decrease while the underground biomass continued to increase. Production of tubers and sugar content were significantly affected by defloration of Qingyu No.2,especially number and size of tubers,which increased 39.67% and 59.46%,respectively. Defloration resulted in higher yields (22.53% more compared with the control). Defloration was observed to reduce the total soluble sugar content but played less of a role in reducing tuber sugar content. The content of 1-Kestose was raised 32.47% but other sugar ingredients were not changed.

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