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Resistance mechanisms of Prunus rootstocks to root-knot nematode, Meloidogyne incognita

Published online by Cambridge University Press:  23 October 2009

Hang Ye ,
Wen-jun Wang ,
Guo-jie Liu ,
Li-xin Zhu  and
Ke-gong Jia
Hang Ye
Affiliation:
Coll. Agron. Biotechnol., China Agric. Univ., Beijing 100094, China
Wen-jun Wang
Affiliation:
Coll. Agron. Biotechnol., China Agric. Univ., Beijing 100094, China
Guo-jie Liu
Affiliation:
Coll. Agron. Biotechnol., China Agric. Univ., Beijing 100094, China
Li-xin Zhu
Affiliation:
Coll. Agron. Biotechnol., China Agric. Univ., Beijing 100094, China
Ke-gong Jia
Affiliation:
Coll. Agron. Biotechnol., China Agric. Univ., Beijing 100094, China
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Abstract

Introduction. Root-knot nematodes (Meloidogyne sp.) cause significant economic damage to Prunus species in China. One of the most economical and environmentally sustainable methods to reduce the impact of root-knot nematodes is the use of resistant rootstock cultivars. Our aim was to examine resistance to M. incognita and its mechanisms. Materials and methods. Four rootstocks were assessed: Tsukuba-4 (P. persica), Tsukuba-5 (P. persica), Nanking cherry (P. tomentosa) and wild peach (P. persica). The susceptible tomato (Lycopersicon esculentum Mill.) cultivar ‘Baiguoqiangfeng’ was used as a positive control. Results. Nematodes did not penetrate roots of Tsukuba-4 and Tsukuba-5, which were considered to be immune varieties. Nanking cherry was highly resistant to M. incognita, whereas wild peach was susceptible. Conclusion. The differences in resistance among the rootstocks were not attributed to differences in effects of root diffusates, but were related to the different structural organizations of the root tips. The epidermal structure of Tsukuba-4 and Tsukuba-5 completely prevented the penetration of second-stage juveniles of M. incognita (J2). In Nanking cherry, penetration of J2 juveniles was reduced, and the development of nematodes from the J2 to female stage was delayed.

Keywords

ChinaPrunuspest resistanceMeloidogyne incognitarootstocksvariety trialsplant tissuesChinePrunusrésistance aux organismes nuisiblesMeloidogyne incognitaporte greffeessai de variététissu végétal
Type
Research Article
Information
Fruits , Volume 64 , Issue 5 , September 2009 , pp. 295 - 303
Copyright
© CIRAD, EDP Sciences, 2009

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