scholarly journals The jasmonoyl‐isoleucine receptor CORONATINE INSENSITIVE1 suppresses defence gene expression in Arabidopsis roots independently of its ligand

2021 ◽  
Author(s):  
Louisa Ulrich ◽  
Johanna Schmitz ◽  
Corinna Thurow ◽  
Christiane Gatz
Keyword(s):  
Gene Expression ◽  
Defence Gene Expression

scholarly journals Proteomic analyses of defence gene expression in a model tomato‐Verticillium pathosystem

2009 ◽  
Vol 23 (S1) ◽  
Author(s):  
Jane Robb ◽  
Barbara Lee ◽  
Alex Kurosky ◽  
Ross N. Nazar
Keyword(s):  
Gene Expression ◽  
Defence Gene Expression ◽  
Proteomic Analyses

scholarly journals Defence gene expression and phloem quality contribute to mesophyll and phloem resistance to aphids in wild barley

2019 ◽  
Vol 70 (15) ◽  
pp. 4011-4026 ◽  
Author(s):  
Daniel J Leybourne ◽  
Tracy A Valentine ◽  
Jean A H Robertson ◽  
Estefania Pérez-Fernández ◽  
Angela M Main ◽  
...  
Keyword(s):  
Gene Expression ◽  
Partial Resistance ◽  
Plant Traits ◽  
Rhopalosiphum Padi ◽  
Glandular Trichome ◽  
Hordeum Spontaneum ◽  
Barley Cultivar ◽  
Agricultural Pests ◽  
Electrical Penetration Graph ◽  
Defence Gene Expression

Abstract Aphids, including the bird cherry-oat aphid (Rhopalosiphum padi), are significant agricultural pests. The wild relative of barley, Hordeum spontaneum 5 (Hsp5), has been described to be partially resistant to R. padi, with this resistance proposed to involve higher thionin and lipoxygenase gene expression. However, the specificity of this resistance to aphids and its underlying mechanistic processes are unknown. In this study, we assessed the specificity of Hsp5 resistance to aphids and analysed differences in aphid probing and feeding behaviour on Hsp5 and a susceptible barley cultivar (Concerto). We found that partial resistance in Hsp5 to R. padi extends to two other aphid pests of grasses. Using the electrical penetration graph technique, we show that partial resistance is mediated by phloem- and mesophyll-based resistance factors that limit aphid phloem ingestion. To gain insight into plant traits responsible for partial resistance, we compared non-glandular trichome density, defence gene expression, and phloem composition of Hsp5 with those of the susceptible barley cultivar Concerto. We show that Hsp5 partial resistance involves elevated basal expression of thionin and phytohormone signalling genes, and a reduction in phloem quality. This study highlights plant traits that may contribute to broad-spectrum partial resistance to aphids in barley.

scholarly journals An aphid effector promotes barley susceptibility through suppression of defence gene expression

2020 ◽  
Vol 71 (9) ◽  
pp. 2796-2807 ◽  
Author(s):  
Carmen Escudero-Martinez ◽  
Patricia A Rodriguez ◽  
Shan Liu ◽  
Pablo A Santos ◽  
Jennifer Stephens ◽  
...  
Keyword(s):  
Gene Expression ◽  
Sequence Similarity ◽  
Rhopalosiphum Padi ◽  
Functional Characterization ◽  
Aphid Species ◽  
Transgenic Barley ◽  
Defence Gene Expression ◽  
Hormone Signalling ◽  
Plant Susceptibility

Abstract Aphids secrete diverse repertoires of effectors into their hosts to promote the infestation process. While ‘omics’ approaches facilitated the identification and comparison of effector repertoires from a number of aphid species, the functional characterization of these proteins has been limited to dicot (model) plants. The bird cherry-oat aphid Rhopalosiphum padi is a pest of cereal crops, including barley. Here, we extend efforts to characterize aphid effectors with regard to their role in promoting susceptibility to the R. padi–barley interaction. We selected three R. padi effectors based on sequence similarity to previously characterized Myzus persicae effectors and assessed their subcellular localization, expression, and role in promoting plant susceptibility. Expression of R. padi effectors RpC002 and Rp1 in transgenic barley lines enhanced plant susceptibility to R. padi but not M. persicae, for which barley is a poor host. Characterization of Rp1 transgenic barley lines revealed reduced gene expression of plant hormone signalling genes relevant to plant–aphid interactions, indicating that this effector enhances susceptibility by suppressing plant defences in barley. Our data suggest that some aphid effectors specifically function when expressed in host species, and feature activities that benefit their corresponding aphid species.

Cladosporium fulvum CfHNNI1 induces hypersensitive necrosis, defence gene expression and disease resistance in both host and nonhost plants

2007 ◽  
Vol 64 (1-2) ◽  
pp. 89-101 ◽  
Author(s):  
Xin-Zhong Cai ◽  
Xin Zhou ◽  
You-Ping Xu ◽  
Matthieu H. A. J. Joosten ◽  
Pierre J. G. M. de Wit
Keyword(s):  
Gene Expression ◽  
Disease Resistance ◽  
Cladosporium Fulvum ◽  
Defence Gene Expression

scholarly journals An aphid effector promotes barley susceptibility through suppression of defence gene expression

2019 ◽  
Author(s):  
Carmen Escudero-Martinez ◽  
Patricia A. Rodriguez ◽  
Pablo A. Santos ◽  
Jennifer Stephens ◽  
Jorunn I.B. Bos
Keyword(s):  
Gene Expression ◽  
Rhopalosiphum Padi ◽  
Functional Characterization ◽  
Aphid Species ◽  
Subcellular Localisation ◽  
Transgenic Barley ◽  
Defence Gene Expression ◽  
Hormone Signalling ◽  
Plant Susceptibility

AbstractAphids secrete diverse repertoires of effectors into their hosts to promote the infestation process. While “omics”-approaches facilitated the identification and comparison of effector repertoires from a number of aphid species, the functional characterization of these proteins has been limited to dicot (model) plants. The bird cherry-oat aphid Rhopalosiphum padi is a pest of cereal crops, including barley. Here, we extended efforts to characterize aphid effectors with regards to their role in promoting susceptibility to the R. padi-barley interaction. We selected 3 R. padi effectors based on sequences similarity to previously characterized M. persicae effectors and assessed their subcellular localisation, expression, and role in promoting plant susceptibility. Expression of R. padi effectors RpC002 and Rp1 in transgenic barley lines enhanced plant susceptibility to R. padi but not M. persicae, for which barley is a poor host. Characterization of Rp1 transgenic barley lines revealed reduced gene expression of plant hormone signalling genes relevant to plant-aphid interactions, indicating this effector enhances susceptibility by suppressing plant defences in barley. Our data suggests that some aphid effectors specifically function when expressed in host species, and feature activities that benefit their corresponding aphid species.

Microspore embryogenesis in barley: anther pre-treatment stimulates plant defence gene expression

Planta ◽  
2008 ◽  
Vol 229 (2) ◽  
pp. 393-402 ◽  
Author(s):  
Cédric Jacquard ◽  
Florence Mazeyrat-Gourbeyre ◽  
Pierre Devaux ◽  
Kim Boutilier ◽  
Fabienne Baillieul ◽  
...  
Keyword(s):  
Gene Expression ◽  
Plant Defence ◽  
Microspore Embryogenesis ◽  
Defence Gene Expression ◽  
Pre Treatment

scholarly journals A highly efficient transient protoplast system for analyzing defence gene expression and protein?protein interactions in rice

2006 ◽  
Vol 7 (5) ◽  
pp. 417-427 ◽  
Author(s):  
SONGBIAO CHEN ◽  
LIZEN TAO ◽  
LIRONG ZENG ◽  
MIGUEL E. VEGA-SANCHEZ ◽  
KENJI UMEMURA ◽  
...  
Keyword(s):  
Gene Expression ◽  
Protein Interactions ◽  
Protein Protein Interactions ◽  
Highly Efficient ◽  
Defence Gene Expression

The Mediator subunit SFR6/MED16 controls defence gene expression mediated by salicylic acid and jasmonate responsive pathways

2012 ◽  
Vol 195 (1) ◽  
pp. 217-230 ◽  
Author(s):  
Deepthi L. Wathugala ◽  
Piers A. Hemsley ◽  
Caroline S. Moffat ◽  
Pieter Cremelie ◽  
Marc R. Knight ◽  
...  
Keyword(s):  
Gene Expression ◽  
Salicylic Acid ◽  
Defence Gene Expression
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