scholarly journals Fire blight disease reactome: RNA-seq transcriptional profile of apple host plant defense responses to Erwinia amylovora pathogen infection

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Tim Kamber ◽  
Jan P. Buchmann ◽  
Joël F. Pothier ◽  
Theo H. M. Smits ◽  
Thomas Wicker ◽  
...  
Keyword(s):  
Plant Defense ◽  
Host Plant ◽  
Fire Blight ◽  
Erwinia Amylovora ◽  
Defense Responses ◽  
Transcriptional Profile ◽  
Rna Seq ◽  
Plant Defense Responses ◽  
Pathogen Infection ◽  
Blight Disease

scholarly journals Disease Interactions in a Shared Host Plant: Effects of Pre-Existing Viral Infection on Cucurbit Plant Defense Responses and Resistance to Bacterial Wilt Disease

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e77393 ◽  
Author(s):  
Lori R. Shapiro ◽  
Lucie Salvaudon ◽  
Kerry E. Mauck ◽  
Hannier Pulido ◽  
Consuelo M. De Moraes ◽  
...  
Keyword(s):  
Viral Infection ◽  
Plant Defense ◽  
Host Plant ◽  
Bacterial Wilt ◽  
Defense Responses ◽  
Wilt Disease ◽  
Plant Defense Responses ◽  
Bacterial Wilt Disease ◽  
Plant Effects

Regulatory mechanisms of host plant defense responses to arbuscular mycorrhiza

2011 ◽  
Vol 31 (6) ◽  
pp. 322-327 ◽  
Author(s):  
Fuqiang Song ◽  
Ge Song ◽  
Airong Dong ◽  
Xiangshi Kong
Keyword(s):  
Plant Defense ◽  
Arbuscular Mycorrhiza ◽  
Host Plant ◽  
Defense Responses ◽  
Regulatory Mechanisms ◽  
Plant Defense Responses

scholarly journals An efficient direct screening system for microorganisms that activate plant immune responses based on plant–microbe interactions using cultured plant cells

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mari Kurokawa ◽  
Masataka Nakano ◽  
Nobutaka Kitahata ◽  
Kazuyuki Kuchitsu ◽  
Toshiki Furuya
Keyword(s):  
Immune Responses ◽  
Plant Defense ◽  
Pseudomonas Syringae ◽  
Large Scale ◽  
Plant Cells ◽  
Defense Responses ◽  
Root Tip ◽  
General Strategy ◽  
Plant Defense Responses ◽  
Microbe Interactions

AbstractMicroorganisms that activate plant immune responses have attracted considerable attention as potential biocontrol agents in agriculture because they could reduce agrochemical use. However, conventional methods to screen for such microorganisms using whole plants and pathogens are generally laborious and time consuming. Here, we describe a general strategy using cultured plant cells to identify microorganisms that activate plant defense responses based on plant–microbe interactions. Microbial cells were incubated with tobacco BY-2 cells, followed by treatment with cryptogein, a proteinaceous elicitor of tobacco immune responses secreted by an oomycete. Cryptogein-induced production of reactive oxygen species (ROS) in BY-2 cells served as a marker to evaluate the potential of microorganisms to activate plant defense responses. Twenty-nine bacterial strains isolated from the interior of Brassica rapa var. perviridis plants were screened, and 8 strains that enhanced cryptogein-induced ROS production in BY-2 cells were selected. Following application of these strains to the root tip of Arabidopsis seedlings, two strains, Delftia sp. BR1R-2 and Arthrobacter sp. BR2S-6, were found to induce whole-plant resistance to bacterial pathogens (Pseudomonas syringae pv. tomato DC3000 and Pectobacterium carotovora subsp. carotovora NBRC 14082). Pathogen-induced expression of plant defense-related genes (PR-1, PR-5, and PDF1.2) was enhanced by the pretreatment with strain BR1R-2. This cell–cell interaction-based platform is readily applicable to large-scale screening for microorganisms that enhance plant defense responses under various environmental conditions.

scholarly journals Method for the Production and Purification of Plant Immuno-Active Xylanase from Trichoderma

2021 ◽  
Vol 22 (8) ◽  
pp. 4214
Author(s):  
Gautam Anand ◽  
Meirav Leibman-Markus ◽  
Dorin Elkabetz ◽  
Maya Bar
Keyword(s):  
Immune System ◽  
Plant Defense ◽  
Plant Immunity ◽  
Xylanase Activity ◽  
Hydrolytic Enzymes ◽  
Adaptive Immune System ◽  
Defense Responses ◽  
Plant Defense Responses ◽  
Xylanase Production ◽  
Ideal System

Plants lack a circulating adaptive immune system to protect themselves against pathogens. Therefore, they have evolved an innate immune system based upon complicated and efficient defense mechanisms, either constitutive or inducible. Plant defense responses are triggered by elicitors such as microbe-associated molecular patterns (MAMPs). These components are recognized by pattern recognition receptors (PRRs) which include plant cell surface receptors. Upon recognition, PRRs trigger pattern-triggered immunity (PTI). Ethylene Inducing Xylanase (EIX) is a fungal MAMP protein from the plant-growth-promoting fungi (PGPF)–Trichoderma. It elicits plant defense responses in tobacco (Nicotiana tabacum) and tomato (Solanum lycopersicum), making it an excellent tool in the studies of plant immunity. Xylanases such as EIX are hydrolytic enzymes that act on xylan in hemicellulose. There are two types of xylanases: the endo-1, 4-β-xylanases that hydrolyze within the xylan structure, and the β-d-xylosidases that hydrolyze the ends of the xylan chain. Xylanases are mainly synthesized by fungi and bacteria. Filamentous fungi produce xylanases in high amounts and secrete them in liquid cultures, making them an ideal system for xylanase purification. Here, we describe a method for cost- and yield-effective xylanase production from Trichoderma using wheat bran as a growth substrate. Xylanase produced by this method possessed xylanase activity and immunogenic activity, effectively inducing a hypersensitive response, ethylene biosynthesis, and ROS burst.

scholarly journals Induction, modification, and transduction of the salicylic acid signal in plant defense responses.

1995 ◽  
Vol 92 (10) ◽  
pp. 4134-4137 ◽  
Author(s):  
Z. Chen ◽  
J. Malamy ◽  
J. Henning ◽  
U. Conrath ◽  
P. Sanchez-Casas ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Plant Defense ◽  
Defense Responses ◽  
Plant Defense Responses
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