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Citation:

Physiological Response of Pinus thunbergii and Pinus massoniana to Bursaphelenchus xylophilus Infection

  • Received Date: 2010-08-04
  • In order to study the effects of Bursaphelenchus xylophilus infection on the nutritional chemicals and secondary metabolites of the host plants, the total sugars, reducing sugar, soluble sugar, soluble proteins, tannins and total phenol in stem were assayed in two host plants Pinus thunbergii and P. massoniana inoculated with B. xylophilus. The results indicated that the total sugar concentration of both P. thunbergii and P. massoniana increased after inoculating and then decreased gradually with the extending of the attack time. The soluble sugar content of P. thunbergii decreased obviously, while that of P. massoniana changed slightly until 15 days and then decreased. The soluble protein content of both host plants decreased at first, then increased and decreased again. The tannin content of P. thunbergii increased all along with infecting time, whereas that of P. massoniana decreased in the first day and increased until 30 days. The total phenol content of P. thunbergii increased in the first 7 days and then decreased in the following days, but that of P. massoniana continued to increase after inoculating, and showed significant difference from the third day on. The changing tendency of above substances interpreted the physiopathology response of different host plant infected with B. xylophilus.
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Physiological Response of Pinus thunbergii and Pinus massoniana to Bursaphelenchus xylophilus Infection

  • 1. Nanjing Forestry University, Jiangsu Provincial Key Laboratory for Prevention and Management of Invasive Species, Nanjing 210037, Jiangsu, China
  • 2. Nanjing Agricultural University, Nanjing 210095, Jiangsu, China

Abstract: In order to study the effects of Bursaphelenchus xylophilus infection on the nutritional chemicals and secondary metabolites of the host plants, the total sugars, reducing sugar, soluble sugar, soluble proteins, tannins and total phenol in stem were assayed in two host plants Pinus thunbergii and P. massoniana inoculated with B. xylophilus. The results indicated that the total sugar concentration of both P. thunbergii and P. massoniana increased after inoculating and then decreased gradually with the extending of the attack time. The soluble sugar content of P. thunbergii decreased obviously, while that of P. massoniana changed slightly until 15 days and then decreased. The soluble protein content of both host plants decreased at first, then increased and decreased again. The tannin content of P. thunbergii increased all along with infecting time, whereas that of P. massoniana decreased in the first day and increased until 30 days. The total phenol content of P. thunbergii increased in the first 7 days and then decreased in the following days, but that of P. massoniana continued to increase after inoculating, and showed significant difference from the third day on. The changing tendency of above substances interpreted the physiopathology response of different host plant infected with B. xylophilus.

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