Study on the molecular mechanism of Laccaria bicolor helping Populus trichocarpa to resist the infection of Botryosphaeria dothidea

2021 ◽  
Author(s):  
Fengxin Dong ◽  
Yihan Wang ◽  
Ming Tang
Keyword(s):  
Molecular Mechanism ◽  
Populus Trichocarpa ◽  
Laccaria Bicolor ◽  
Botryosphaeria Dothidea

scholarly journals Populus trichocarpa and Populus deltoides Exhibit Different Metabolomic Responses to Colonization by the Symbiotic Fungus Laccaria bicolor

2014 ◽  
Vol 27 (6) ◽  
pp. 546-556 ◽  
Author(s):  
Timothy J. Tschaplinski ◽  
Jonathan M. Plett ◽  
Nancy L. Engle ◽  
Aurelie Deveau ◽  
Katherine C. Cushman ◽  
...  
Keyword(s):  
Populus Deltoides ◽  
Populus Trichocarpa ◽  
Metabolic Reprogramming ◽  
Plant Roots ◽  
Root Tip ◽  
Laccaria Bicolor ◽  
Root Tips ◽  
Defensive Compounds ◽  
Host Interactions ◽  
Incompatible Interactions

Within boreal and temperate forest ecosystems, the majority of trees and shrubs form beneficial relationships with mutualistic ectomycorrhizal (ECM) fungi that support plant health through increased access to nutrients as well as aiding in stress and pest tolerance. The intimate interaction between fungal hyphae and plant roots results in a new symbiotic “organ” called the ECM root tip. Little is understood concerning the metabolic reprogramming that favors the formation of this hybrid tissue in compatible interactions and what prevents the formation of ECM root tips in incompatible interactions. We show here that the metabolic changes during favorable colonization between the ECM fungus Laccaria bicolor and its compatible host, Populus trichocarpa, are characterized by shifts in aromatic acid, organic acid, and fatty acid metabolism. We demonstrate that this extensive metabolic reprogramming is repressed in incompatible interactions and that more defensive compounds are produced or retained. We also demonstrate that L. bicolor can metabolize a number of secreted defensive compounds and that the degradation of some of these compounds produces immune response metabolites (e.g., salicylic acid from salicin). Therefore, our results suggest that the metabolic responsiveness of plant roots to L. bicolor is a determinant factor in fungus–host interactions.

scholarly journals The mutualism effector MiSSP7 of Laccaria bicolor alters the interactions between the poplar JAZ6 protein and its associated proteins

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yohann Daguerre ◽  
Veronica Basso ◽  
Sebastian Hartmann-Wittulski ◽  
Romain Schellenberger ◽  
Laura Meyer ◽  
...  
Keyword(s):  
Protein Interaction ◽  
Populus Trichocarpa ◽  
Interaction Network ◽  
Laccaria Bicolor ◽  
Symbiotic Interaction ◽  
Protein Protein Interaction ◽  
Jaz Proteins ◽  
Associated Proteins ◽  
Ja Signaling ◽  
Poplar Root

AbstractDespite the pivotal role of jasmonic acid in the outcome of plant-microorganism interactions, JA-signaling components in roots of perennial trees like western balsam poplar (Populus trichocarpa) are poorly characterized. Here we decipher the poplar-root JA-perception complex centered on PtJAZ6, a co-repressor of JA-signaling targeted by the effector protein MiSSP7 from the ectomycorrhizal basidiomycete Laccaria bicolor during symbiotic development. Through protein–protein interaction studies in yeast we determined the poplar root proteins interacting with PtJAZ6. Moreover, we assessed via yeast triple-hybrid how the mutualistic effector MiSSP7 reshapes the association between PtJAZ6 and its partner proteins. In the absence of the symbiotic effector, PtJAZ6 interacts with the transcription factors PtMYC2s and PtJAM1.1. In addition, PtJAZ6 interacts with it-self and with other Populus JAZ proteins. Finally, MiSSP7 strengthens the binding of PtJAZ6 to PtMYC2.1 and antagonizes PtJAZ6 homo-/heterodimerization. We conclude that a symbiotic effector secreted by a mutualistic fungus may promote the symbiotic interaction through altered dynamics of a JA-signaling-associated protein–protein interaction network, maintaining the repression of PtMYC2.1-regulated genes.

scholarly journals The Mutualist Laccaria bicolor Expresses a Core Gene Regulon During the Colonization of Diverse Host Plants and a Variable Regulon to Counteract Host-Specific Defenses

2015 ◽  
Vol 28 (3) ◽  
pp. 261-273 ◽  
Author(s):  
Jonathan M. Plett ◽  
Emilie Tisserant ◽  
Annick Brun ◽  
Emmanuel Morin ◽  
Igor V. Grigoriev ◽  
...  
Keyword(s):  
Host Plants ◽  
Populus Trichocarpa ◽  
Transcriptional Response ◽  
Core Gene ◽  
Laccaria Bicolor ◽  
Transcriptional Level ◽  
Mutualistic Interaction ◽  
Ecm Fungi ◽  
Transcriptomic Level ◽  
Fresh Insight

The coordinated transcriptomic responses of both mutualistic ectomycorrhizal (ECM) fungi and their hosts during the establishment of symbiosis are not well-understood. This study characterizes the transcriptomic alterations of the ECM fungus Laccaria bicolor during different colonization stages on two hosts (Populus trichocarpa and Pseudotsuga menziesii) and compares this to the transcriptomic variations of P. trichocarpa across the same timepoints. A large number of L. bicolor genes (≥8,000) were significantly regulated at the transcriptional level in at least one stage of colonization. From our data, we identify 1,249 genes that we hypothesize is the ‘core’ gene regulon necessary for the mutualistic interaction between L. bicolor and its host plants. We further identify a group of 1,210 genes that are regulated in a host-specific manner. This variable regulon encodes a number of genes coding for proteases and xenobiotic efflux transporters that we hypothesize act to counter chemical-based defenses simultaneously activated at the transcriptomic level in P. trichocarpa. The transcriptional response of the host plant P. trichocarpa consisted of differential waves of gene regulation related to signaling perception and transduction, defense response, and the induction of nutrient transfer in P. trichocarpa tissues. This study, therefore, gives fresh insight into the shifting transcriptomic landscape in both the colonizing fungus and its host and the different strategies employed by both partners in orchestrating a mutualistic interaction.

Additional evidence for AQP1 vesicle trafficking as a molecular mechanism for ductal bile secretion

2001 ◽  
Vol 120 (5) ◽  
pp. A91-A91
Author(s):  
P TIETZ ◽  
P SPLINTER ◽  
M MCNIVEN ◽  
R HUEBERT ◽  
N LARUSSO
Keyword(s):  
Molecular Mechanism ◽  
Vesicle Trafficking ◽  
Bile Secretion

Hypoxia/Reoxygenation on human myometrial and decidual cells: A molecular mechanism involved in preterra labor

1998 ◽  
Vol 5 (1) ◽  
pp. 187A-187A
Author(s):  
J CARVAJAL ◽  
S KATO ◽  
J SAEZ ◽  
F LEIGHTON ◽  
G VALENZUELA ◽  
...  
Keyword(s):  
Molecular Mechanism ◽  
Decidual Cells ◽  
Hypoxia Reoxygenation

Molecular Mechanism of Apoptosis Induction by Resveratrol, a Natural Cancer Chemopreventive Agent

2008 ◽  
Vol 78 (1) ◽  
pp. 3-8 ◽  
Author(s):  
Fan ◽  
Jiang ◽  
Zhang ◽  
Bai
Keyword(s):  
Cancer Treatment ◽  
Molecular Mechanism ◽  
Apoptosis Induction ◽  
Protective Agents ◽  
Chemopreventive Agent ◽  
Naturally Occurring ◽  
Apoptosis Pathways ◽  
Present Understanding

In efforts to identify naturally occurring compounds that act as protective agents, resveratrol, a phytoalexin existing in wine, has attracted much interest because of its diverse pharmacological characteristics. Considering that apoptosis induction is the most potent defense approach for cancer treatment, we have tried to summarize our present understanding of apoptosis induction by resveratrol based on the two major apoptosis pathways.

Betaines and free amino acids in salt stressed vitroplants and winter resting buds of Populus trichocarpa x deltoides

1991 ◽  
Vol 83 (1) ◽  
pp. 136-143 ◽  
Author(s):  
L. Bray ◽  
D. Chriqui ◽  
K. Gloux ◽  
D. Le Rudulier ◽  
M. Meyer ◽  
...  
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Populus Trichocarpa
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