Article
Multidisciplinary Sciences
Mari Kurokawa, Masataka Nakano, Nobutaka Kitahata, Kazuyuki Kuchitsu, Toshiki Furuya
Summary: The study used cultured plant cells to screen microorganisms that activate plant immune responses, with evaluation based on ROS production. Eight bacterial strains out of 29 isolated from within Brassica rapa var. perviridis plants were found to enhance cryptogein-induced ROS production in BY-2 cells.
SCIENTIFIC REPORTS
(2021)
Article
Plant Sciences
Charles Agbavor, Babur S. Mirza, Alexander Wait
Summary: Phyllosphere bacteria have the potential to regulate the infection of Pseudomonas syringae and improve soybean growth and physiology. This study demonstrates that a consortium of phyllosphere bacteria can effectively reduce Psg cell density and mitigate the negative effects of Psg on soybean growth and physiology. The application of the bacterial consortium also resulted in increases in plant biomass, nodule numbers, and leaf chlorophyll.
Review
Ecology
Rosaelle Perreault, Isabelle Laforest-Lapointe
Summary: Global change poses imminent threats to ecosystem dynamics and services, and plant-microbe interactions in the phyllosphere play a crucial role in influencing plant survival and adaptation in this context. Microorganisms can enhance plant resistance to biotic and abiotic stresses, improve urban pollution remediation, impact plant species range shifts, and drive plant adaptation to drought and warming.
Article
Environmental Sciences
Hanareia Ehau-Taumaunu, Kevin L. Hockett
Summary: Bacteria use antagonistic strategies, such as producing bacteriocins, to compete for resources in various environments. This study demonstrates that a bacterial plant pathogen expresses a bacteriocin in leaf apoplast when co-inoculated with a bacteriocin-sensitive competitor. While the bacteriocin negatively affects the competitor's population, a benefit is observed for the producing strain only when it is co-infiltrated at a low population frequency. This fitness benefit is dependent on the Type III Secretion System.
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2022)
Article
Ecology
Shifra Steinberg, Maor Grinberg, Michael Beitelman, Julianna Peixoto, Tomer Orevi, Nadav Kashtan
Summary: This study found that interactions between immigrant bacteria and resident microbiota affect the microscale spatial organization of leaf microbiota, especially due to the preferential attachment of microbiota cells near newly formed P. fluorescens aggregates.
Review
Plant Sciences
Jade R. Bleau, Steven H. Spoel
Summary: The review discusses recent progress in understanding how plants establish immunity through selective and reversible redox signaling mechanisms.
Article
Biochemistry & Molecular Biology
Xiaobo Qin, Min Zhang, Qiaohong Li, Dalei Chen, Leiming Sun, Xiujuan Qi, Ke Cao, Jinbao Fang
Summary: By analyzing the transcriptomic profiles of kiwifruit shoots, it was found that different varieties have different defense mechanisms against Pseudomonas syringae pv. actinidiae (Psa). The PTI and cell walls play important roles in Maohua's defense against Psa infection, while the ETI is crucial in Hongyang's defense against the pathogen.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Microbiology
Stephany Angelia Tumewu, Hidenori Matsui, Mikihiro Yamamoto, Yoshiteru Noutoshi, Kazuhiro Toyoda, Yuki Ichinose
Summary: In this study, four dCache_1 type MCPs in Pta6605 were characterized, with PscA, PscB, and PscC2 responsible for sensing amino acids. Mutant strains of PscA, PscB, and PscC2 showed reduced chemotaxis to most amino acids, as well as effects on cellular functions and virulence in the host tobacco plant.
MICROBIOLOGICAL RESEARCH
(2021)
Article
Plant Sciences
Xiaomu Zhang, Philip J. Tubergen, Israel D. K. Agorsor, Pramod Khadka, Connor Tembe, Cynthia Denbow, Eva Collakova, Guillaume Pilot, Cristian H. Danna
Summary: Activation of the FLS2 receptor suppresses both early infection stages' virulence and long-term growth of PstDC3000 by promoting glutamine and serine buildup in the leaf apoplast. MAMP perception in Arabidopsis induces the accumulation of free amino acids in a SA-dependent manner. Glutamine and Serine, when co-infiltrated, suppress virulence gene expression and robust infections in susceptible plants.
Article
Plant Sciences
Aboubakr Moradi, Mohamed El-Shetehy, Jordi Gamir, Tina Austerlitz, Paul Dahlin, Krzysztof Wieczorek, Markus Kunzler, Felix Mauch
Summary: The study showed that expressing Coprinopsis cinerea lectin 2 (CCL2) in Arabidopsis enhanced plant resistance against various nematodes and fungal pathogens, while also improving plant growth and biomass production. The mechanism of CCL2-mediated disease resistance enhancement depended on its fucoside-binding ability, and not on direct growth inhibition. Transcriptional induction of defense genes was significantly increased in CCL2-expressing plants compared to wild type plants, indicating the potential of fungal defense lectins in plant protection.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Aisan Afkhamifar, Cobra Moslemkhani, Nader Hasanzadeh, Javad Razmi
Summary: This study investigates the composition of pathogenic bacterial communities in wheat seeds from different areas of Iran and their effects on the severity of bacterial leaf streak disease caused by X. translucens. The results show that some Pss strains strongly promote disease severity and have different abilities to interact with X. translucens.
JOURNAL OF PLANT PATHOLOGY
(2023)
Article
Plant Sciences
Noel Djitro, Rebecca Roach, Rachel Mann, Brendan Rodoni, Cherie Gambley
Summary: This study reports the first identification of Pseudomonas syringae strains infecting zucchini in Australia, causing significant yield losses. The isolates exhibited variations in pathogenicity across different plant species and some produced fluorescent pigment. Additionally, it was discovered that different zucchini varieties showed varying levels of susceptibility to the isolates.
Article
Biochemistry & Molecular Biology
Anum Bashir, Huafu Yu, Abdul Manan, Lin Li
Summary: In this study, the researchers identified and characterized a nematicidal protein, Peptidase03, from the phytopathogenic bacterium Pseudomonas syringae. They found that Peptidase03 showed significant toxicity against the model nematode Caenorhabditis elegans and an agriculturally important PPN, Meloidogyne incognita. The results suggest that Peptidase03 has potential as an effective control agent for PPNs in agriculture.
MOLECULAR BIOLOGY REPORTS
(2022)
Article
Cell Biology
Barbara N. Kunkel, Joshua M. B. Johnson
Summary: Auxin, a plant hormone, is involved in various aspects of plant growth and development, as well as in plant-microbe interactions, particularly in promoting disease in plant-pathogen interactions. Recent studies have shown that the most well-studied form of auxin, indole-3-acetic acid (IAA), can modulate host signaling and physiology to increase susceptibility, while also impacting the pathogen directly to enhance virulence.
COLD SPRING HARBOR PERSPECTIVES IN BIOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Dimitrios Skliros, Polyxeni Papazoglou, Danai Gkizi, Eleni Paraskevopoulou, Pantelis Katharios, Dimitrios E. Goumas, Sotirios Tjamos, Emmanouil Flemetakis
Summary: In recent years, the biology and biotechnology of bacteriophages have been extensively studied as a means to find environmentally friendly methods to control phytopathogenic bacteria. The use of bacteriophages in biological control of Pseudomonas syringae pv. tomato (Pst) could be an alternative approach to combat bacterial speck disease in tomato plants. The isolated bacteriophage, Medea1, showed promising results in reducing Pst symptoms in tomato plants and upregulating defense-related genes.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)