The stand establishment and growth rate of grafted cucumber seedlings depends on the rootstock and the post-transplant temperature conditions
The objective of this study was to assess the influence of different rootstocks (Cucurbita maxima × Cucurbita moschata and Cucurbita ficifolia) on plant stand establishment and post transplanting growth rate of grafted cucumber seedlings. Young seedlings of a commercial cucumber variety (Cucumis sativus L. 'Centaur F1') were grafted onto each of rootstocks by the common root intact, splice grafting (SG) method. Later, an equal number of 20 DAG (day after grafting) seedlings of each rootstock were randomly selected, transplanted into plastic pots filled with peat and transferred at two different growth chambers, where different, respectively; non optimum (18°C) and optimum (24°C) post-transplant temperature regimes were applied for two weeks. The results of this study indicated that dry weight, length, surface and volume of root system are influenced by post transplanting temperature; the increase of temperature has significantly reduced all these parameters by favoring the growth of above ground biomass. Overall, (Cucurbita maxima × Cucurbita moschata) was characterized by a higher dry weight, and higher length, surface and volume of the root system. However, Cucurbita ficifolia has been able to provide a higher plant relative growth rate under non optimum post-transplant temperature conditions, which seems to be promoted by a significantly higher stomata conductance the cucumber plants grafted onto it did have. Therefore, using Cucurbita ficifolia as a rootstock might be an opportunity to attain a faster stand establishment of cucumber seedlings and hence improved early greenhouse production and expanded cucumber growing season.
Balliu, A., Sallaku, G., Kabashi, B. and Babaj, I. (2021). The stand establishment and growth rate of grafted cucumber seedlings depends on the rootstock and the post-transplant temperature conditions. Acta Hortic. 1320, 327-334
cucumber, rootstock, stand establishment, growth rate, stomata conductance