Beech leaf disease (BLD), Litylenchus crenatae and its potential microbial virulence factors

Elsevier eBooks, Journal Year: 2022, Volume and Issue: unknown, P. 183 - 192

Published: Sept. 30, 2022

Language: Английский

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Rhamnogalacturonan-I as a nematode chemoattractant from Lotus corniculatus L. super-growing root culture

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 13

Published: Jan. 26, 2023

Introduction The soil houses a tremendous amount of micro-organisms, many which are plant parasites and pathogens by feeding off roots for sustenance. Such root often rely on plant-secreted signaling molecules in the rhizosphere as host guidance cues. Here we describe isolation characterization chemoattractant plant-parasitic root-knot nematodes ( Meloidogyne incognita , RKN). Methods Super-growing Root (SR) culture, consisting excised from legume species Lotus corniculatus L., was found to strongly attract infective RKN juveniles actively secrete chemoattractants into liquid culture media. chemo-attractant media supernatant purified using hydrophobicity anion exchange chromatography, be enriched carbohydrates. Results Monosaccharide analyses suggest contains wide array sugars, but is arabinose, galactose galacturonic acid. This shown contain pectin, specifically anti-rhamnogalacturonan-I anti-arabinogalactan protein epitopes not anti-homogalacturonan epitopes. More importantly, arabinose sidechain groups were essential RKN-attracting activities. appears specific M. it wasn’t effective attracting other nor Caenorhabditis elegans . Discussion first report identify nematode attractant exudate L L. Our findings re-enforce pectic carbohydrates important chemicals mediating micro-organism chemotaxis soil, also highlight unexpected utilities SR system pathogen research.

Language: Английский

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Battling the biotypes of balsam: the biological control of Impatiens glandulifera using the rust fungus Puccinia komarovii var. glanduliferae in GB

Fungal Biology, Journal Year: 2021, Volume and Issue: 125(8), P. 637 - 645

Published: April 14, 2021

Impatiens glandulifera, or Himalayan balsam, is a prolific invader of riverine habitats. Introduced from the Himalayas for ornamental purposes in 1839, this annual species has naturalised across Great Britain (GB) forming dense monocultures with negative affects whole ecosystems. In 2006 programme exploring biocontrol as an alternative control method was initiated and to date, two strains rust fungus Puccinia komarovii var. glanduliferae have been released. To better understand observed differences susceptibility GB balsam stands strains, inoculation studies were conducted using urediniospores basidiospores. Experiments revealed large variation some resistant both. Furthermore, infectivity basidiospores found differ, fully susceptible urediniospore stage, being immune basidiospore infection. Therefore, before further releases at new sites, it necessary ensure complete compatibility invasive both However, successful essential that plant biotypes are matched most virulent strains. This will involve additional native range tackle those currently

Language: Английский

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The Bacterial Wilt Reservoir Host Solanum dulcamara Shows Resistance to Ralstonia solanacearum Infection

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 12

Published: Nov. 10, 2021

Ralstonia solanacearum causes bacterial wilt, a devastating plant disease, responsible for serious losses on many crop plants. R. phylotype II-B1 strains have caused important outbreaks in temperate regions, where the pathogen has been identified inside asymptomatic bittersweet ( Solanum dulcamara ) plants near rivers and potato fields. S. is perennial species described as reservoir host can overwinter, but their interaction remains uncharacterised. In this study, we systematically analysed infection , dissecting behaviour of compared with susceptible hosts such tomato cv. Marmande, which well described. Compared tomatoes, (i) show delayed symptomatology progression, (ii) restrict movement between xylem vessels, (iii) limit root colonisation, (iv) constitutively higher lignification stem. Taken together, these results demonstrate that behaves partially resistant to property enhanced at lower temperatures. This study proves tolerance (i.e., capacity reduce negative effects infection) not required wild act host. We propose inherent resistance (impediment colonisation) habit enable behave reservoirs .

Language: Английский

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Gall-inducing Psylloidea (Insecta: Hemiptera) – plant interactions

Journal of Plant Interactions, Journal Year: 2022, Volume and Issue: 17(1), P. 580 - 594

Published: May 23, 2022

The Psylloidea, >4000 named species known today, are plant-feeding, sap-sucking insects sleeved under the Sternorrhyncha. Most of Psylloidea confined to tropics. They occur as gall-inducing, free-living, and lerp-forming taxa. Lifecycles generations gall-inducing vary in temperate tropical worlds. Triozidae, Aphalaridae, Calophyidae include several taxa that induce galls diverse morphologies, from simple pits leaf-margin rolls complex pouches two-tier structures. feeding mechanism nutritional physiology differ those free-living species. A majority associated with dicotyledons a small number monocotyledons. specific certain plants. Their host specificity is regulated by lipids sterols. show conservative behavior terms geographical distribution. Although life histories aspects explaining their association plants little known. Details less presently compared better understanding level relationship between necessary.

Language: Английский

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