Induction of host defences by Rhizobium during ineffective nodulation of pea (Pisum sativum L.) carrying symbiotically defective mutations sym40 (PsEFD), sym33 (PsIPD3/PsCYCLOPS) and sym42

Protoplasma
Kira A IvanovaV E Tsyganov

Abstract

Rhizobia are able to establish a beneficial interaction with legumes by forming a new organ, called the symbiotic root nodule, which is a unique ecological niche for rhizobial nitrogen fixation. Rhizobial infection has many similarities with pathogenic infection and induction of defence responses accompanies both interactions, but defence responses are induced to a lesser extent during rhizobial infection. However, strong defence responses may result from incompatible interactions between legumes and rhizobia due to a mutation in either macro- or microsymbiont. The aim of this research was to analyse different plant defence reactions in response to Rhizobium infection for several pea (Pisum sativum) mutants that result in ineffective symbiosis. Pea mutants were examined by histochemical and immunocytochemical analyses, light, fluorescence and transmission electron microscopy and quantitative real-time PCR gene expression analysis. It was observed that mutations in pea symbiotic genes sym33 (PsIPD3/PsCYCLOPS encoding a transcriptional factor) and sym40 (PsEFD encoding a putative negative regulator of the cytokinin response) led to suberin depositions in ineffective nodules, and in the sym42 there were callose depositions in infe...Continue Reading

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Citations

Dec 22, 2015·International Journal of Genomics·Vladimir A ZhukovIgor A Tikhonovich
Jun 9, 2019·Protoplasma·Peter Nick
Apr 2, 2019·Frontiers in Plant Science·Tatiana A SerovaViktor E Tsyganov
Jan 1, 2018·Functional Plant Biology : FPB·Anna V TsyganovaViktor E Tsyganov
Dec 16, 2020·Plants·Viktor E Tsyganov, Anna V Tsyganova

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