Entries by Tatsuya Nobori

A plant secondary metabolite selectively targets bacterial pathogenicity (Cell Host Microbe)

Plants have a variety of secondary metabolites that are associated with defense against pathogens, but the mode of action of such metabolites is poorly understood. Wang et al. revealed that the Arabidopsis secondary metabolite sulforaphane (SFN), which is derived from aliphatic glucosinolate, suppresses transcript accumulation of genes involved in the type III secretion system (T3SS), an essential […]

How plants keep their microbiota healthy (Nature)

The large apoplastic intercellular space of plant leaves creates nutrient-rich niches for microbial colonization. To date, whether and how plants control the composition of leaf microbiota is poorly understood. Chen et al. reported that the Arabidopsis quadruple mutant (min7fls2efrcerk1 or mfec) defective in pattern-triggered immunity and a vesicle trafficking pathway (MIN7 encodes an ARF-GEF protein) showed tissue damage phenotypes […]

Review: A CRISPR way for accelerating improvement of food crops (Nature Food)

CRISPR technologyhas become indispensable for basic plant biology research and has the potential to profoundly impact future agriculture. Zhang et al. provide an overview of CRISPR technology and discuss how this technology will revolutionize future crop breeding. CRISPR technology can not only introduce DNA breaks for gene knockout, but it can also precisely edit bases. […]

Auxin response factor targeted by viruses (PNAS)

Auxin regulates various aspects of plant growth and development and it also contributes to plant defense. Auxin activates downstream signaling by promoting degradation of the repressor Aux/IAA proteins to liberate the key transcription factors ARFs (auxin response factors). Pathogens have been known to mitigate plant defense by targeting Aux/IAA proteins to manipulate plant auxin signaling […]

Unlocking interspecies grafting (bioRxiv)

Plant grafting is an agricultural technique that joins plant tissues (e.g., the shoot and root) to confer beneficial traits from one plant to another. Although interfamily grafting is difficult in general, Notaguchi et al. found that Nicotiana benthamiana (Nb) has a strong potential to graft with phylogenetically distant plant species. Transcriptome analysis revealed that genes […]

A plant kinase exploited by a bacterial effector (bioRxiv)

Pathogens have evolved a suite of effector proteins that are secreted into plants and aid successful colonization. AvrPtoB is a well-conserved effector of pathogenic Pseudomonas syringae strains that targets multiple plant defense-related proteins and is required for pathogen virulence and bacterial growth in plants. Phosphorylation of AvrPtoB in plants is important for its virulence functions, but the […]

A molecular link between photoreceptors and jasmonates (Nature Plants)

Plants balance their efforts on growth and defense depending on the situation. Competitive conditions signaled by the low ratios of red (R) to far-red (FR) light suppress defense responses mediated by the plant hormone jasmonate (JA), presumably for allocating more resources to promote plant growth. Fernández-Milmanda et al. identified the sulfotransferase ST2a as a missing […]

Heat tolerance regulated by an ancient jasmonate signaling pathway (Curr. Biol)

Jasmonate responses are regulated not only by the well-studied pair of the bioactive hormone jasmonoyl-isoleucine (JA-Ile) and the receptor COI1, but also the cyclopentenone OPDA and the JA-Ile precursor dn-OPDA can activate jasmonate signaling. However, the OPDA/dn-OPDA signaling and their physiological roles are not fully understood. To dissect the COI1-independent OPDA/dn-OPDA responses, Monte, Kneeshaw, et […]

Hybrid autoimmunity and a plant resistosome complex ($) (Cell Host Microbe)

Hybrid necrosis occurs when the progeny of a cross between two different plants show widespread cell death. It can be caused by autoactivation of nucleotide-binding and leucine rich repeat domain (NLR) proteins, intracellular immune receptors that play a central role in plant resistance to diverse pathogens. Li et al. showed that hybrid necrosis in the […]