%0 Journal Article
%T Expression of pathogenesis related genes in response to salicylic acid, methyl jasmonate and 1-aminocyclopropane-1-carboxylic acid in Malus hupehensis (Pamp.) Rehd
%A Jiyu Zhang
%A Xiaoli Du
%A Qingju Wang
%A Xiukong Chen
%A Dong Lv
%A Kuanyong Xu
%A Shenchun Qu
%A Zhen Zhang
%J BMC Research Notes
%D 2010
%I BioMed Central
%R 10.1186/1756-0500-3-208
%X In order to analyze the expression pattern, the partial sequence of three PR genes from Malus hupehensis, MhPR1, MhPR5 and MhPR8 was isolated. These three PR genes were induced by SA, MeJA and ACC. However, MhPR1, MhPR5 and MhPR8 performed a distinct pattern of expression in different plant organs. MhPR5 and MhPR8 were basal expression in leaves, stems and roots, and MhPR1 was basal expression only in stems. The expression of MhPR1, MhPR5 and MhPR8 was enhanced during the first 48 h post-induced with SA, MeJA and ACC.The results showed that a distinct pattern of expression of PR genes in Malus hupehensis which differed from the previous reports on model plants arabidopsis, tobacco and rice. MhPR1, MhPR5 and MhPR8 were induced by SA, MeJA and ACC, which were regarded as the marker genes in the SAR response in Malus hupehensis. In contrast with herbal plants, there could be specific signal pathway in response to SA, JA and ET for woody plants.In nature, basal defenses have been evolved by plants against the adverse conditions such as pathogens, insects, and injuries and so on. Plants have been invaded multiple aggressors simultaneously or subsequently, which could affect the principal induced defense response of the host plants [1]. Botanists have acknowledged that the phytohormones salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) play key roles in the signaling network that regulates the induced defense responses in plants [2-6]. Plants have evolved powerful regulatory potential by Cross talk among SA-, JA-, and ET-dependent signaling pathways to effectively and efficiently adapt to the complex hostile situation [6-8]. SA-, JA-, and ET-dependent pathways regulated defense responses and were differentially effective to against specific types of invaders in plants [9,10].Pathogenesis-related (PR) proteins, which are the downstream components of systemic acquired resistance (SAR) in plants, have been used routinely for the defense status of plants with positiv
%U http://www.biomedcentral.com/1756-0500/3/208