Featured
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Article
| Open Access
Petal abscission is promoted by jasmonic acid-induced autophagy at Arabidopsis petal bases
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.
- Yuki Furuta
- , Haruka Yamamoto
- & Nobutoshi Yamaguchi
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Article
| Open Access
Endocytosis-mediated entry of a caterpillar effector into plants is countered by Jasmonate
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.
- Zi-Wei Yan
- , Fang-Yan Chen
- & Ying-Bo Mao
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Article
| Open Access
Different viral effectors suppress hormone-mediated antiviral immunity of rice coordinated by OsNPR1
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
- Hehong Zhang
- , Fengmin Wang
- & Zongtao Sun
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Article
| Open Access
A bacterial kinase phosphorylates OSK1 to suppress stomatal immunity in rice
XopC2 effectors are present in many plant bacterial pathogens. Here the authors show that XopC2 has kinase activity and enhances disease susceptibility by phosphorylating the OSK1 protein, which increases its interaction with the jasmonate receptor COI1b to promote JA signaling and stomatal opening.
- Shanzhi Wang
- , Shuai Li
- & Wenxian Sun
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Article
| Open Access
Warm temperature triggers JOX and ST2A-mediated jasmonate catabolism to promote plant growth
Plants undergo morphological changes to enhance cooling at warm temperatures. Here Zhu et al. show that JOXs and ST2A enzymes, which mediate jasmonate catabolism, contribute to this process by reducing the level of bioactive jasmonate facilitating growth responses.
- Tingting Zhu
- , Cornelia Herrfurth
- & Ive De Smet
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Article
| Open Access
Cloning of wheat keto-acyl thiolase 2B reveals a role of jasmonic acid in grain weight determination
It has been reported that several phytohormones are involved in the regulation of grain weight, but the role of jasmonic acids (JA) remains elusive. Here, via bulked segregant analysis (BSA)-based cloning, the authors show keto-acyl thiolase 2B involved in β-oxidation during JA synthesis is a positive regulator of wheat grain weight.
- Yun Chen
- , Yan Yan
- & Jin-Ying Gou
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Article
| Open Access
A rationally designed JAZ subtype-selective agonist of jasmonate perception
The phytohormone JA-Ile can promote plant resistance against herbivores and fungal pathogens but also inhibits growth, limiting its potential use in agriculture. Here, the authors design a stereoisomer of JA-Ile analog and demonstrate that it can promote defense while having minimal impact on growth.
- Yousuke Takaoka
- , Mana Iwahashi
- & Minoru Ueda
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Article
| Open Access
MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway
Inflorescence architecture affects crop grain yield. Here, the authors deploy whole-genome sequencing-based bulk segregant analysis to identify the causal gene of a sorghum multi-seeded (msd) mutant and suggest MSD1 regulating the fertility of the pedicellate spikelets through jasmonic acid pathway.
- Yinping Jiao
- , Young Koung Lee
- & Zhanguo Xin
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Article
| Open Access
Jasmonate response decay and defense metabolite accumulation contributes to age-regulated dynamics of plant insect resistance
Immunity deteriorates with age in animals but less is known about how aging affects immunity in plants. Here, Maoet al. show that responsiveness to the major insect defense hormone JA declines as plants age, but insect resistance still increases as plants accumulate secondary metabolites such as glucosinolates.
- Ying-Bo Mao
- , Yao-Qian Liu
- & Xiao-Ya Chen
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Article
| Open Access
Salicylic acid receptors activate jasmonic acid signalling through a non-canonical pathway to promote effector-triggered immunity
Salicylic acid (SA) and jasmonic acid (JA) often act antagonistically in plant defence. Here, Liu et al. show that during effector-triggered immunity (ETI) against Pseudomonas syringae, JA signalling is activated via a non-canonical pathway involving the SA receptors, NPR3 and NPR4, to positively regulate ETI.
- Lijing Liu
- , Fathi-Mohamed Sonbol
- & Xinnian Dong
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Article
| Open Access
Rewiring of jasmonate and phytochrome B signalling uncouples plant growth-defense tradeoffs
Plant immune responses are often associated with reduced growth. Here, the authors show that combining mutations in transcriptional repressors of the defense and light perception pathways can confer both robust growth and strong herbivore defense, demonstrating that growth-defense tradeoffs can be uncoupled.
- Marcelo L. Campos
- , Yuki Yoshida
- & Gregg A. Howe
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Article
| Open Access
A fluorescent hormone biosensor reveals the dynamics of jasmonate signalling in plants
Jasmonate regulates multiple aspects of plant growth, development and stress responses. Here, Larrieu et al. develop a fluorescent biosensor that allows jasmonate perception to be monitored at previously unobtainable levels of spatiotemporal resolution in Arabidopsis.
- Antoine Larrieu
- , Antony Champion
- & Laurent Laplaze
Natural variation in OsMYB8 confers diurnal floret opening time divergence between indica and japonica subspecies