《Table 2 Effect of rootstocks on the survival rate and vegetative growth of grafted watermelon seedl

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《Effects of Different Rootstocks on Plant Growth and Fruit Quality of Watermelon》

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In most combinations，rootstock type showed a significant correlation with the survival rate，the number of leaves，the number of branches，and the length of main vine of grafted watermelon seedlings（P<0.05，0.01 and 0.001），while watermelon variety and the interaction between watermelon variety and rootstock type showed no significant influences on vegetative growth of grafted watermelon seedlings.The data in Table 2 revealed that there was an extremely significant correlation between rootstock type and the survival rate of grafted watermelon seedlings.Among all treatments，non-grafted watermelon seedlings（the control）had the highest survival rate，up to 95.00%，followed by the seedlings grafted onto rootstock 1（bottle guard，78.30%），and seedlings grafted onto rootstock 2（black-seed pumpkin），rootstock 4（Jingxinzhen No.4）and rootstock 6（Jingxinzhenguan）.The survival rates of seedlings grafted onto rootstock 3（Japanese Xuesong）and rootstock 5（Jingxinzhen No.2）were the lowest（lower than 50%）.The number of leaves per plant is linked to photosynthesis efficiency of plants.In general，more leaves indicate more chlorophylls that can participate in photosynthesis，and the plants can grow better.As shown in Table 2，grafting increased the number of leaves of watermelon seedlings，which was consistent with previous studies[12-13].We also found that the number of leaves per seedling in all rootstock-scion combinations was higher than that of the control group，which was 76.17 on average.The number of leaves of seedlings grafted onto Jingxinzhen No.4 was the highest，up to 106.67.The number of branches and the length of main vine reflect plant vegetative growth.As shown in Table 2，the number of branches of seedlings grafted onto Jingxinzhenguan was the highest，up to 22.00，while there was no significant difference in the number of branches between other rootstock-scion combinations and the control group.The main vine length of watermelon seedlings grafted on Jingxinzhen No.2 was the highest，up to238.83 cm，while there was no significant difference in this index between other rootstock-scion combinations and the control group.