Plant-Microbe Interactions: Life and Death at the Interface.

Jackson, Andrew O.; Taylor, Crispin B.

doi:10.1105/tpc.8.10.1651

Cited by 116 publications

(22 citation statements)

References 17 publications

(14 reference statements)

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“…Moreover, CS‐20 resulted in a higher expression level of PR3 in comparison with FOC‐BN treatment, so PR3 was considered as a key gene involved in activation of the defence response. Chitinase 1, which is encoded by PR3 and can hydrolyze chitin (one of the components of certain fungal pathogen cell walls), is believed to contribute to the defence of plants (Broglie et al ., ; Jackson & Taylor, ; Roy & Chakraborty, ). In CS‐20‐inoculated roots, the gene expression pattern of PR3 indicated that chitinase 1 activation contributed mainly to the development and transduction of a signal to the plant.…”

Section: Discussionmentioning

confidence: 99%

Analysis of the defence-related mechanism in cucumber seedlings in relation to root colonization by nonpathogenicFusarium oxysporumCS-20

Xie

et al. 2014

FEMS Microbiol Lett

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A defence response can be induced by nonpathogenic Fusarium oxysporum CS-20 in several crops, but the molecular mechanism has not been clearly demonstrated. In the present study, we analysed the defence mechanism of a susceptible cucumber cultivar (Cucumis sativus L. 9930) against a pathogen (F. oxysporum f. sp. cucumerinum) through the root precolonization of CS-20. A challenge inoculation assay indicated that the disease severity index (DSI) was reduced, ranging from 18.83 to 61.67 in comparison with the pathogen control. Root colonization analysis indicated that CS-20 clearly did not appear to influence the growth of cucumber seedlings. Quantitative reverse-transcriptase polymerase chain reaction (qRT-PCR) revealed that CS-20-mediated defence response was activated by PR3, LOX1 and PAL1 and the pathogenmediated resistance response was regulated by PR1 and PR3. Moreover, both nonpathogenic and pathogenic F. oxysporum were able to upregulate NPR1 expression. In contrast to a pathogen, CS-20 can activate the Ca 2+ /CaM signal transduction pathway, and the gene expression of both CsCam7 and CsCam12 increased significantly. The gene expression analysis indicated that CS-20 strongly enhanced the expression of PR3, LOX1, PAL1, NPR1, CsCam7 and CsCam12 after inoculation. Overall, the defence response induced by CS-20 can be controlled by multiple genes in the cucumber plant.

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Section: Discussionmentioning

confidence: 99%

Analysis of the defence-related mechanism in cucumber seedlings in relation to root colonization by nonpathogenicFusarium oxysporumCS-20

Xie

et al. 2014

FEMS Microbiol Lett

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“…The HR in response to pathogen attack is an effective defense mechanism that limits pathogen growth in host tissue (Stintzi et al 1993; Dixon et al 1994; Hammond‐Kosack and Jones 1996; Jackson and Taylor 1996). Likewise, the accumulation of specific PR proteins upon infection is a well‐documented defense‐related phenomenon associated with the HR (Bowles 1990; Stintzi et al 1993) and provided the hypothesis for our study that the structural or chemical defense mechanisms of Lr35 resistance should be reflected in protein composition.…”

Section: Discussionmentioning

confidence: 99%

Intercellular proteins and β‐1,3‐glucanase activity associated with leaf rust resistance in wheat

Anguelova

Westhuizen

Pretorius

1999

Physiologia Plantarum

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To investigate biochemical aspects of resistance conferred by the Lr35 gene for adult‐plant resistance in wheat (Triticum aestivum L.) to leaf rust, pathogen development was related to intercellular protein composition and β‐1,3‐glucanase (EC 3.2.1.39) activities at three growth stages in infected and uninfected resistant (RL6082 [Thatcher/Lr35]) and susceptible (Thatcher) plants. Leaf rust symptoms produced by pathotype UVPrt9 of Puccinia recondita f. sp. tritici showed that resistance conferred by Lr35 was most effective at the flag leaf stage. Furthermore, fluorescence microscopy indicated that resistance was strongly associated with hypersensitive cell death of invaded tissue. According to polypeptide profiles, intercellular proteins with molecular masses of 35, 33, 31 and 26 kDa were constitutively present at higher levels in resistant than in susceptible plants at the flag leaf stage. Four intercellular proteins (35, 33, 32 and 31 kDa) serologically related to β‐1,3‐glucanase were present in resistant and susceptible genotypes during all stages of plant growth. Resistance was associated with high constitutive levels of β‐1,3‐glucanase activity. Susceptibility on the other hand was associated with low constitutive levels of β‐1,3‐glucanase, while high levels were induced by infection during more advanced stages of colonization. Our results suggest that β‐1,3‐glucanase is involved in the defense response controlled by the Lr35 gene.

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“…Initially, this phenomenon was thought to be ubiquitous, and resistance was thought to be equally effective against many different pathogens (Ryals et al . 1994; Jackson & Taylor 1996 and literature cited therein), but more recent studies suggest intra‐and interspecific variability (see later). The systemic reaction involves the production of chitinases, β‐(1,3)‐glucanases, lysozyme, permatins, and at least two more classes of so‐called pathogenesis‐related (PR) proteins (Ryals et al .…”

Section: Sar – a Short Synopsismentioning

confidence: 93%

Systemic acquired resistance: available information and open ecological questions

Heil¹

1999

Journal of Ecology

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Plant-Microbe Interactions: Life and Death at the Interface.

Cited by 116 publications

References 17 publications

Analysis of the defence-related mechanism in cucumber seedlings in relation to root colonization by nonpathogenicFusarium oxysporumCS-20

Analysis of the defence-related mechanism in cucumber seedlings in relation to root colonization by nonpathogenicFusarium oxysporumCS-20

Intercellular proteins and β‐1,3‐glucanase activity associated with leaf rust resistance in wheat

Systemic acquired resistance: available information and open ecological questions

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