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Article

A New Grafting Method for Watermelon to Inhibit Rootstock Regrowth and Enhance Scion Growth

1
College of Horticulture and Forestry Sciences/Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
2
College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
3
Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518000, China.
*
Author to whom correspondence should be addressed.
Academic Editor: Rosario Paolo Mauro
Agriculture 2021, 11(9), 812; https://doi.org/10.3390/agriculture11090812
Received: 29 July 2021 / Revised: 23 August 2021 / Accepted: 25 August 2021 / Published: 26 August 2021
(This article belongs to the Special Issue Recent Advances in Horticultural Grafting)
Grafting is a widely used technique in watermelon (Citrullus lanatus) production. However, cost of grafted seedlings is generally high as a result of intensive labor inputs for propagation using traditional grafting methods such as the manual removal of rootstock regrowth. This study developed a new grafting tool to physically remove the epidermis of pumpkin (C. maxima × C. moschata) and bottle gourd (Lagenaria siceraria) rootstock cotyledon base during grafting; we called this a new grafting method. Compared with the traditional grafting, the new grafting method significantly decreased the pumpkin rootstock regrowth rate from 100% to 8% in hole insertion and 2% in one cotyledon grafting, respectively. These attenuated rates for bottle gourd rootstock regrowth were 23% and 9% in hole insertion and one cotyledon grafting, respectively. The scion dry weights of new hole insertion and one cotyledon grafting were increased by 78% and 74% when pumpkin was used as rootstock as compared with traditional grafting without regrown rootstock removal, while the respective values were 33% and 17% in bottle gourd rootstock grafted plants. In addition, the time used for the new hole insertion grafting method to physically remove the epidermis of pumpkin rootstock cotyledon base was significantly shorter than the time required to remove the rootstock regrowth manually three times in the traditional grafting (4.2 s/plant vs. 9.3 s/plant). Similar results were also observed in the new one cotyledon grafting (4.2 s/plant vs. 8.8 s/plant). Taken together, this study presents a new method in watermelon grafting to reduce rootstock regrowth, therefore benefiting both scion growth and plant management, thus the development of this new method is clearly useful in watermelon production. View Full-Text
Keywords: Citrullus lanatus; grafting tool; rootstock regrowth; scion growth; vegetable grafting Citrullus lanatus; grafting tool; rootstock regrowth; scion growth; vegetable grafting
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  • Externally hosted supplementary file 1
    Doi: 10.5281/zenodo.5144605
    Link: https://zenodo.org/record/5144605
    Description: Supplementary Video S1: Method to show how the new grafting tool is used, https://www.preprints.org/manuscript/202107.0693/v1/download/supplementary.
MDPI and ACS Style

Liu, C.; Lin, W.; Feng, C.; Wu, X.; Fu, X.; Xiong, M.; Bie, Z.; Huang, Y. A New Grafting Method for Watermelon to Inhibit Rootstock Regrowth and Enhance Scion Growth. Agriculture 2021, 11, 812. https://doi.org/10.3390/agriculture11090812

AMA Style

Liu C, Lin W, Feng C, Wu X, Fu X, Xiong M, Bie Z, Huang Y. A New Grafting Method for Watermelon to Inhibit Rootstock Regrowth and Enhance Scion Growth. Agriculture. 2021; 11(9):812. https://doi.org/10.3390/agriculture11090812

Chicago/Turabian Style

Liu, Changjin, Weiguo Lin, Chongran Feng, Xiangshuai Wu, Xiaohu Fu, Mu Xiong, Zhilong Bie, and Yuan Huang. 2021. "A New Grafting Method for Watermelon to Inhibit Rootstock Regrowth and Enhance Scion Growth" Agriculture 11, no. 9: 812. https://doi.org/10.3390/agriculture11090812

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