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ACTA HORTICULTURAE SINICA ›› 2018, Vol. 45 ›› Issue (6): 1115-1124.doi: 10.16420/j.issn.0513-353x.2017-0744

• Research Papers • Previous Articles     Next Articles

Effects of Silicon Nutrition and Rootstocks on Silicon Uptake and Distribution and Expression of Silicon Transporter Genes in Grafted Cucumbers

ZHAO Sheng1,LI Zhihong1,*,SHEN Qiong1,WANG Hui1,ZHOU Xin1,and WEI Min1,2,3,**   

  1. 1College of Horticultural Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China;2State Key Laboratory of Crop Biology,Tai’an,Shandong 271018,China;3Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production in Shandong,Tai’an,Shandong 271018,China
  • Online:2018-06-25 Published:2018-06-25

Abstract: In order to investigate the mechanism underlying the effects of rootstocks on fruit bloom formation of grafted cucumbers under different silicon nutrition conditions,the rootstocks‘Yunnan figleaf gourd’and‘Huangchenggen 2’were used to study the absorption and distribution of silicon,expression of silicon transporter genes and bloom formation in the grafted plants of cucumber‘Shannong 5’,which were grown by hydroponics with the nutrient solution with silicon added or without. The results showed that the fruit bloom and silicon contents in organ of the cucumbers grafted on‘Yunnan figleaf gourd’and self-rooted cucumbers were significantly increased by added silicon,and much higher than those in the cucumbers grafted on‘Huangchenggen 2’. The fruit bloom and silicon contents in organs of the cucumbers grafted on‘Huangchenggen 2’by added silicon were similar with those of the cucumbers grafted or self-rooted cucumbers in the condition without silicon added. The expression of CmLsi1,CmLsi2-1,CmLsi2-2 and CmLsi3 in roots of cucumbers grafted on‘Yunnan figleaf gourd’was higher than that in roots of cucumbers grafted on‘Huangchenggen 2’. With the prolongation of silicon treatment,the expression of silicon transporter genes in roots of cucumbers grafted onto‘Yunnan figleaf gourd’was down-regulated,the expression of those genes in roots of cucumbers grafted on‘Huangchenggen 2’also decreased.

Key words: cucumber, grafting, rootstock, bloom, silicon, silicon transporter gene

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