Convergent evolution of effector protease recognition by Arabidopsis and barley (bioRxiv)
Plant Science Research WeeklyPathogenic bacteria Pseudomonas syringae produce an effector protein, AvrPphB. The indirect interaction between this bacterial effector and the Arabidopsis resistance (R) protein RPS5 has been characterized previously; AvrPphB is a cysteine protease that targets another plant protein, PBS1, causing it…
Arabidopsis thaliana-associated Pseudomonas diversity and evolution
Plant Science Research WeeklyThere is not much available information regarding the evolutionary aspects of one of the most studied pathosystem in plant biology: Arabidopsis thaliana and Pseudomonas. Karazov et al. performed various surveys in Arabidopsis wild populations, for the detection and characterization of their associated…
Singlet Oxygen and Osmotic Stress
Blog, Plant Physiology, Plant Physiology: On The InsideSome experimental systems aimed at understanding the effects of drought on plants have incorporated cell-impermeable high molecular weight polyethylene glycol (PEG) to mimic the osmotic component of drought stress. The use of PEG showed that drought stress response could be separated into components…
The role of the seventh subfamily of cytoplasmic receptor kinases in plant immunity revealed by genetics
Blog, Plant Physiology, Plant Physiology: EditorialsSource: Institute of Genetics and Developmental Biology Published: 2018-07-09 http://www.cas.cn/syky/201807/t20180704_4657120.shtml Translation by Google
Pattern recognition receptors (PRRs) on plant cell membranes recognize some of the conserved molecular patterns derived from pathogens that…
A new mechanism for plant immune pathways discovered by genetics
Blog, The Plant Cell: NewsSource: Institute of Genetics and Developmental Biology Published: 2018-07-05 http://www.cas.cn/syky/201807/t20180704_4657121.shtml (Translation by Google Translate)
Plants sense the presence of pathogens through pattern recognition receptors (PRRs ) located on the surface of the cell membrane to…
The Phytophthora RXLR effector AVR3a12 suppresses ER-mediated plant immunity (Mol. Plant)
Plant Science Research WeeklyThe pathogenic oomycete Phytophthora capsici secretes RXLR effector proteins into plant cells to subvert host cell machinery and facilitate disease. Several RXLR effector proteins have been characterized to date, however, Phytophthora species encode a vast array of effector molecules that likely target…
Phylogenomics reveals multiple losses of nitrogen-fixing root nodule symbiosis (Science)
Plant Science Research WeeklyThe ability to participate in nitrogen-fixing root nodule symbiosis shows an interesting phylogenetic pattern, with some families showing a large number of nodulating species interspersed with non-nodulating ones, and some families showing only a few nodulating species. A current model suggests that…
Pathogenic Bacteria Use A “Self-Eating” Process to Trick Plants
Research, The Plant Cell, The Plant Cell: In a NutshellÜstün et al. show that pathogenic Pseudomonas enhances the autophagic turnover of proteins in Arabidopsis https://doi.org/10.1105/tpc.17.00815.
By Suayib Üstün and Daniel Hofius
Background: Autophagy and the proteasome are the major pathways for protein degradation in eukaryotes. While the…
Plant exosomes mediate cross-kingdom RNA interference ($) (Science)
Plant Science Research WeeklySmall RNAs (sRNAs) trafficking between host plant and pathogens can occur in a wide range on interactions. Pathogen-produced sRNAs have been shown to suppress host plant immunity, and conversely host plant-derived sRNAs can reduce pathogen virulence by targeting pathogenic genes of the pest. Nevertheless,…