Age-related resistance to Pseudomonas syringae pv. tomato is associated with the transition to flowering in Arabidopsis and is effective against Peronospora parasitica

Rustérucci, Christine; Zhao, Zhiying; Haines, Karen; Mellersh, Denny G.; Neumann, Melody; Cameron, Robin K.

doi:10.1016/j.pmpp.2005.08.004

Cited by 44 publications

(42 citation statements)

References 46 publications

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“…This finding is of interest, because previous studies have noted that the development of ARR, defined as the development of resistance in mature tissues, is often associated with transition to flowering (35,78). Within Arabidopsis, ARR has been shown to impact the virulence of P. syringae and the systemic movement of cauliflower mosaic virus (79,80). In both systems, mutations in genes associated with the induction and maintenance of flowering were shown to influence the development of this resistance.…”

Section: Discussionmentioning

confidence: 87%

Tobacco mosaic virus-directed reprogramming of auxin/indole acetic acid protein transcriptional responses enhances virus phloem loading

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Padmanabhan

Hsieh

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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Vascular phloem loading has long been recognized as an essential step in the establishment of a systemic virus infection. In this study, an interaction between the replication protein of tobacco mosaic virus (TMV) and phloem-specific auxin/indole acetic acid (Aux/IAA) transcriptional regulators was found to modulate virus phloem loading in an age-dependent manner. Promoter expression studies show that in mature tissues TMV 126/183-kDa-interacting Aux/IAAs predominantly express and accumulate within the nuclei of phloem companion cells (CCs). Furthermore, CC Aux/IAA nuclear localization is disrupted upon infection with an interacting virus. In situ analysis of virus spread shows that the inability to disrupt Aux/IAA CC nuclear localization correlates with a reduced ability to load into the vascular tissue. Subsequent systemic movement assays also demonstrate that a virus capable of disrupting Aux/IAA localization is significantly more competitive at moving out of older plant tissues than a noninteracting virus. Similarly, CC expression and overaccumulation of a degradation-resistant Aux/IAA-interacting protein was found to inhibit TMV accumulation and phloem loading selectively in flowering plants. Transcriptional expression studies demonstrate a role for Aux/IAAinteracting proteins in the regulation of salicylic and jasmonic acid host defense responses as well as virus-specific movement factors, including pectin methylesterase, that are involved in regulating plasmodesmata size-exclusion limits and promoting virus cell-to-cell movement. Combined, these findings indicate that TMV directs the reprogramming of auxin-regulated gene expression within the vascular phloem of mature tissues as a means to enhance phloem loading and systemic spread.pathogen defense | plant hormone signaling | virus movement | plasmodesmata gating | age-related resistance

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Section: Discussionmentioning

confidence: 87%

Tobacco mosaic virus-directed reprogramming of auxin/indole acetic acid protein transcriptional responses enhances virus phloem loading

Collum

Padmanabhan

Hsieh

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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“…oryzae in rice cultivars at the tillering stage. Besides tillering, other developmental transitions, such as the juvenile-adult transition and the onset of Xoral development, have been reported to be associated with a constant increase in resistance levels (Hunter et al 1977;Lazarovits et al 1981;Leisner et al 1993;Heath 1994;Abedon and Tracy 1996;Coelho et al1998;Century et al 1999;Hugot et al 1999;Rusterucci et al 2005). The coincident switching oV of Rphq2 and switching on of Rphq4 at tillering suggests that the two QTLs are involved in diVerent defense pathways.…”

Section: Discussionmentioning

confidence: 99%

The phenotypic expression of QTLs for partial resistance to barley leaf rust during plant development

Wang

et al. 2010

Theor Appl Genet

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Partial resistance is generally considered to be a durable form of resistance. In barley, Rphq2, Rphq3 and Rphq4 have been identiWed as consistent quantitative trait loci (QTLs) for partial resistance to the barley leaf rust pathogen Puccinia hordei. These QTLs have been incorporated separately into the susceptible L94 and the partially resistant Vada barley genetic backgrounds to obtain two sets of near isogenic lines (NILs). Previous studies have shown that these QTLs are not eVective at conferring disease resistance in all stages of plant development. In the present study, the two sets of QTL-NILs and the two recurrent parents, L94 and Vada, were evaluated for resistance to P. hordei isolate 1.2.1 simultaneously under greenhouse conditions from the Wrst leaf to the Xag leaf stage. EVect of the QTLs on resistance was measured by development rate of the pathogen, expressed as latency period (LP). The data show that Rphq2 prolongs LP at the seedling stage (the Wrst and second leaf stages) but has almost no eVect on disease resistance in adult plants. Rphq4 showed no eVect on LP until the third leaf stage, whereas Rphq3 is consistently eVective at prolonging LP from the Wrst leaf to the Xag leaf. The changes in the eVectiveness of Rphq2 and Rphq4 happen at the barley tillering stage (the third to fourth leaf stages). These results indicate that multiple disease evaluations of a single plant by repeated inoculations of the fourth leaf to the Xag leaf should be conducted to precisely estimate the eVect of Rphq4. The present study conWrms and describes in detail the plant development-dependent eVectiveness of partial resistance genes and, consequently, will enable a more precise evaluation of partial resistance regulation during barley development.

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“…For example, susceptibility to Puccinia sorghi (common rust) in maize is manifested in younger plants but as the plants mature, the level of disease resistance augments (Abedon and Tracy, 1996). In Arabidopsis, transitions from the vegetative to the floral phase correlates with resistance to Pseudomonas syringae (Kus et al, 2002;Rusterucci et al, 2005). While ARR at the molecular level has been studied with respect to leaf pathogens, little discussion has focused on root defense strategies and their role in ARR.…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere microbiome assemblage is affected by plant development

2013

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There is a concerted understanding of the ability of root exudates to influence the structure of rhizosphere microbial communities. However, our knowledge of the connection between plant development, root exudation and microbiome assemblage is limited. Here, we analyzed the structure of the rhizospheric bacterial community associated with Arabidopsis at four time points corresponding to distinct stages of plant development: seedling, vegetative, bolting and flowering. Overall, there were no significant differences in bacterial community structure, but we observed that the microbial community at the seedling stage was distinct from the other developmental time points. At a closer level, phylum such as Acidobacteria, Actinobacteria, Bacteroidetes, Cyanobacteria and specific genera within those phyla followed distinct patterns associated with plant development and root exudation. These results suggested that the plant can select a subset of microbes at different stages of development, presumably for specific functions. Accordingly, metatranscriptomics analysis of the rhizosphere microbiome revealed that 81 unique transcripts were significantly (Po0.05) expressed at different stages of plant development. For instance, genes involved in streptomycin synthesis were significantly induced at bolting and flowering stages, presumably for disease suppression. We surmise that plants secrete blends of compounds and specific phytochemicals in the root exudates that are differentially produced at distinct stages of development to help orchestrate rhizosphere microbiome assemblage.

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Age-related resistance to Pseudomonas syringae pv. tomato is associated with the transition to flowering in Arabidopsis and is effective against Peronospora parasitica

Cited by 44 publications

References 46 publications

Tobacco mosaic virus-directed reprogramming of auxin/indole acetic acid protein transcriptional responses enhances virus phloem loading

Tobacco mosaic virus-directed reprogramming of auxin/indole acetic acid protein transcriptional responses enhances virus phloem loading

The phenotypic expression of QTLs for partial resistance to barley leaf rust during plant development

Rhizosphere microbiome assemblage is affected by plant development

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