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Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (8): 1795-1804.doi: 10.16420/j.issn.0513-353x.2021-0379

• Research Notes • Previous Articles     Next Articles

Effects of Silicon Nutrition and Grafting Rootstocks on Chilling Tolerance of Cucumber Seedlings

NIE Xinmiao1, LUAN Heng1, FENG Gaili1, WANG Chao1,2, LI Yan1,2,3, WEI Min1,2,3,*()   

  1. 1. College of Horticultural Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China
    2. Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region,Ministry of Agriculture and Rural Affairs,Tai’an,Shandong 271018,China
    3. State Key Laboratory of Crop Biology,Tai’an,Shandong 271018,China
  • Received:2022-02-21 Revised:2022-04-06 Online:2022-08-25 Published:2022-09-05
  • Contact: WEI Min E-mail:minwei@sdau.edu.cn

Abstract:

In this study,effects of silicon nutrition and grafting rootstocks on chilling tolerance of‘Xintaimici’cucumber(Cucumis sativus L.)were investigated by using hydroponic non-grafted seedlings and grafted seedlings on both strong de-blooming rootstock‘Huangchenggen 2’(Cucurbita moschata Duch)and weak de-blooming rootstock‘Yunnan Figleaf Gourd’(Cucurbita ficifolia Bouché). The results showed that,under low temperature stress,chilling injury index(CII)of non-grafted cucumber seedlings treated with silicon was significantly lower than that without silicon. The lowest CII was observed in grafted cucumber seedlings on‘Yunnan Figleaf Gourd’followed by the grafted ones on ‘Huangchenggen 2’and finally the non-grafted ones,regardless of silicon supplementation. The significant reduction in electrolyte leakage rate and malondialdehyde content,and the significant enhancement in proline content and antioxidant enzyme(SOD,POD and CAT)activities were observed in the leaves of seedlings supplemented with silicon relative to those without silicon,and in the leaves of grafted seedlings relative to the non-grafted ones,and the alterations in these tolerance-related parameters were greater for grafting treatment,in particular‘Yunnan Figleaf Gourd’used as rootstock,than silicon supplementation. Altogether,our study revealed that both rootstocks and silicon nutrition can improve the chilling tolerance of cucumber seedlings,while grafting treatment displays better performance than silicon supplementation,and for grafting treatment,‘Yunnan Figleaf Gourd’is superior to‘Huangchenggen 2’in alleviating the detrimental effects of chilling stress on cucumber seedlings.

Key words: cucumber, silicon, rootstock, low temperature, chilling tolerance

CLC Number: