Jasmonic acid articles from across Nature Portfolio

Florets of indica rice open earlier than japonica rice, hindering utilization of the cross subspecies heterosis. Here, the authors show that an OsMYB8-OsJAR1 module regulates diurnal floret opening time divergences between the two subspecies.

In angiosperms, petal abscission is crucial for reproductive success and seed dispersion. However, the regulation of this abscission remains unclear. Here, the authors identify a process of petal abscission regulated by jasmonic acid via autophagy at the base of Arabidopsis petals.

The authors find that cotton bollworms secrete effectors into plant to weaken JA signaling via host endocytosis system while JA inhibits endocytosis to restrict effector imports. The defense and counter-defense loop between effector and JA reflects a robust arms race between plant and insect.

Plant viruses have evolved various virulence strategies to overcome plant immunity. Here the authors show that distinct viral proteins repress JA-SA crosstalk by targeting rice NPR1 protein to facilitate viral infection

Construction and screening of a library of all stereochemical isomers of coronatine, a mimic of the plant hormone (+)-7-iso-jasmonoyl-L-isoleucine, identify subtype-selective agonists for COI1-JAZ co-receptors in A. thaliana and S. lycopersicum.

Jasmonic acid (JA) is involved in defence against herbivores. Once the plant is attacked, the memory of aggression can linger for weeks, including in newly formed leaves. The authors investigate what the induced changes in the transcriptome and methylome are, and uncouple short- and long-term effects of JA.

Plants adjust the balance between growth and defence using photoreceptors and jasmonates. Levels of active jasmonates are reduced in a phytochrome B-dependent manner by upregulation of a 12-hydroxyjasmonate sulfotransferase, leading to increase in shade avoidance and decrease in defence.

The development of a new jasmonate reporter further extends the tools that add greater detail to the investigation of plant hormones. Such reporters for the various types of plant hormones, exploiting different aspects of their activity, will help us to eventually study hormone signalling, distribution and dynamics in intact tissue.