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Acta Prataculturae Sinica ›› 2015, Vol. 24 ›› Issue (7): 123-130.DOI: 10.11686/cyxb2014333

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The effects of Meloidogyne incognita infection on osmolyte and hydroxyproline levels in tomato rootstock seedlings with different resistance

JIA Shuang-Shuang1, 2, XU Kun2, *   

  1. 1.College of Life Science, Anhui Science and Technology University, Fengyang 233100, China;
    2.College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
  • Received:2014-08-20 Online:2015-07-20 Published:2015-07-20

Abstract: In order to clarify the physiological resistance mechanism of tomato rootstock to Meloidogyne incognita, both a highly susceptible rootstock variety Ls-89 and a highly resistant rootstock variety Banzhen No.2 were planted in pots and inoculated with second instar larvae to study the effects of M. incognita infection on osmolyte levels and cell wall hydroxyproline contents of these differentially resistant tomato rootstock varieties. Without M. incognita inoculation, there was no significant difference (P>0.05) between seedlings of the two varieties in concentrations of osmoregulation substances, including soluble sugar, soluble protein, proline and cell wall hydroxyproline. After inoculation, the concentrations of osmoregulation substances and cell wall hydroxyproline contents were increased in roots and leaves in seedlings of the two varieties, with the responses in Banzhen No.2 being significantly higher (P<0.05) than those of Ls-89. These results indicate that changes in soluble sugar, soluble protein, proline and cell wall hydroxyproline concentrations are closely associated with the resistance of tomato rootstock seedlings to M. incognita, and could be used as general indices of plant resistance elevation.