Effect of Assessing the Feasibility of Using Physiological and Biochemical Parameters to Assess Thymol for Watermelon Seeds to Improve Germination Characteristic

doi:10.7668/hbnxb.2015.S1.042

Abstract

Abstract: The seeds and seedlings of watermelon were handled by the various concentrations of thymol in order to assess the safety of germination and growth thymol on watermelon seed.There will be provide the theoretical basis for the product used to prevent the watermelon wilt disease.The results showed that the changes of germination energy,germination percentage,germination index and vigor index were no significant difference less than 300 mg/L thymol concentration,whereas it markedly decreased with the rising of the thymol concentration.The effects of thymol on the growth and chlorophyll content were same to the germination.When the thymol concentration was less than 300 mg/L,the growth and chlorophyll content were no significant difference compared with the control (except for the fresh weight).Under the treatment of thymol soaked seeds the root activity gradually reduced with the increase of thymol concentration.The root activity significantly increased compared to the control in 100 mg/L thymol concentration.In 200 mg/L thymol concentration the root activity was higher than the control,whereas there was no significant difference compared to the control.The root activity decreased with the rising of the thymol concentration.The SOD activity significantly increased less than 300 mg/L thymol concentration,whereas it markedly decreased with the rising of the thymol concentration.The POD activity had the same trend as the CAT activity.In 100,200 mg/L thymol concentration the POD and CAT activities were higher than the control,whereas there was no significant difference compared to the control.From the correlations analysis of seed germination parameters and physiological and biochemical indexes with the thymol concentrations knew that it was a negative correlation relationship between seed germination parameters and physiological and biochemical indexes with the higher thymol concentration.All the results showed that the germination and growth were not affected less than 300 mg/L thymol concentration being used to prevent the watermelon wilt disease.

Key words: Thymol, Watermelon wilt disease, Botanical Fungicides, Watermelon

CLC Number:

S651.01

XUE Yan-feng, LI Min, CHEN Jian, ZHANG Meng, SHI Zhi-qi. Effect of Assessing the Feasibility of Using Physiological and Biochemical Parameters to Assess Thymol for Watermelon Seeds to Improve Germination Characteristic[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(S1): 235-240. doi: 10.7668/hbnxb.2015.S1.042.

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