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Expression profiling of the mannuronan C5-epimerase multigenic family in the brown alga Laminaria digitata Phaeophyceae under biotic stress conditions 1.

Nucleic Acids Res Several genes related to the biosynthesis of terpenes were also upregulated in L. Vibrio is a genus of Gram-negative bacteria associated with ice-ice disease in several red seaweeds, such as Kappaphycus alvarezii and Eucheuma denticulatum 5and also with hole-rotten disease in the brown seaweed Laminaria japonica The microbiome associated with healthy individuals of the red seaweed Laurencia dendroidea can fix nitrogen and provide relevant amino acids and vitamins to the seaweed 3.

The concentration of V. MAPK cascades in plant disease resistance signaling. Phosphoinositide-signaling is one component of a robust plant defense response. Signaling cascades that modulate the innate immune response have been well described in plants but are still unknown in seaweeds.

Laurencia is a red seaweed genus widely distributed around the world, recognized for the biosynthesis of diverse halogenated secondary metabolites, especially terpenes, with relevant ecological 2324 and pharmacological 25— 29 activities.

Stress resistance and disease resistance in seaweeds: Effects of ethylene on tetrasporogenesis in Pterocladiella capillacea Rhodophyta 1. The microbial community associated with seaweeds tends to be species specific and different from that associated with seawater 2.

We detected in both the control uninoculated samples and the samples of L. J Nat Prod Mutation of rpoS gene decreased resistance to environmental stresses, synthesis of extracellular products and virulence of Vibrio anguillarum. Although a large array of genes responsible for the biosynthesis of terpenes was recently characterized in L.


There is evidence that JA, or a structurally similar compound sis also involved in defense signals in macroalgae, as this substance induced the expression of stress-related genes in C. Primary metabolism and plant defense—fuel for the fire.

Oligoalginate recognition and oxidative burst play a key role in natural and induced resistance of sporophytes of Laminariales.

Inhibition of photosynthesis and bleaching of zooxanthellae by the coral pathogen Vibrio shiloi. Identification of Arabidopsis ethylene-responsive element binding factors with distinct induction kinetics after pathogen infection. In contrast, the downregulation of genes involved in energy conversion was detected, through a microarray, after the exposure of Chondrus crispus to methyl jasmonate Vibrio madracius was isolated from the coral Madracis decactis sampled in Saint Peter and Saint Paul archipelago This content is distributed under the terms of the Creative Commons Attribution 4.

Role of secondary metabolites as defense chemicals against ice-ice disease bacteria in biofouler at carrageenophyte farms. Genes related to the biosynthesis of terpenes characterized for the first time in Laurencia dendroidea with their EC number, Blast E value, identity, and similarity and the metabolic pathway in which they participate.

Genes involved in PI signaling were also upregulated in L. Trends Plant Sci Oligoguluronates elicit an oxidative burst in the brown algal kelp Laminaria digitata. The present report contributes to evidence indicating the presence of a mechanism in seaweeds similar to plant hormone-regulated defense against microbes.

National Center for Biotechnology InformationU.

Free fatty acids and methyl jasmonate trigger defense reactions in Laminaria digitata. The functional identifications were manually confirmed. Diverse evidence suggests that fighting against microbes is energetically demanding in vascular plants Another important transcriptional regulatory element upregulated in L.

Preliminary study on flginduced defense responses in female gametophytes of Saccharina japonica Phaeophyta. New insights on the terpenome of the red seaweed Laurencia dendroidea Florideophyceae, Rhodophyta. The biloogia RNA was sequenced, providing an unprecedentedly high coverage pedeira the transcriptome of Laurenciaand the gene expression levels were compared between control and inoculated samples after 24, 48, and 72 h.


Molecular Mechanisms for Microbe Recognition and Defense by the Red Seaweed Laurencia dendroidea

Biochim Biophys Acta Although the role of ET signaling in seaweeds was not demonstrated, the ability to synthesize and respond to this plant hormone was previously detected in Enteromorpha intestinalis 73 and Pterocladiella crezpo Pereirq dynamic exon marinja in candidate pathogen receptors … what if brown algae were capable of adaptive immunity? After 24, 48, and 72 h, control and inoculated Eenato. Concentration of Vibrio madracius in the culture medium in the presence 2 replicates [T1 and T2] and absence 2 replicates [CV1 and CV2] of Laurencia dendroidea.

Some of these halogenated compounds are able to prevent the growth of marine bacteria 30— Functional categories associated with energy conversion, such as the glycolytic process, including glucosephosphate isomerase G6PIfructose-bisphosphate aldolase FBAglyceraldehydephosphate dehydrogenase GAPDHand phosphopyruvate hydratase PPHwere overrepresented in the transcriptome of L. Current knowledge about seaweed-microbe interactions at the molecular level is limited, because studies evaluating seaweed resistance to pathogens have been based on the use of indirect stimulus through the application of MAMPs 16PIMPS 15194546and signaling molecules e.

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Characteristics of the cDNA sequences creapo Laurencia dendroidea after preprocessing and assembly a. The upregulation of genes coding for NADPH oxidase and antioxidant enzymes suggests the occurrence of an oxidative burst. Effects of coral reef benthic primary producers on dissolved organic carbon and microbial activity.

Phylogenetic analysis of epiphytic marine bacteria on hole-rotten diseased sporophytes of Laminaria japonica. The expression level of several genes involved in the biosynthesis of terpenes in L.