Jasmonic Acid Signaling Pathway in Plants

Ruan, Jingjun; Zhou, Yuexia; Zhou, Meiliang; Yan, Jun; Khurshid, Muhammad; Weng, Wenfeng; Cheng, Jianping; Zhang, Kaixuan

doi:10.3390/ijms20102479

Cited by 520 publications

(362 citation statements)

References 100 publications

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“…Phytohormones are important small signaling molecules in plants and play critical roles in various basic processes in plants [59]. MeJA is a key plant hormone and regulates pivotal processes, including seedling emergence, response to wounding, fertility, and growth-defense balance [60,61].…”

Section: Discussionmentioning

confidence: 99%

“…MeJA is a key plant hormone and regulates pivotal processes, including seedling emergence, response to wounding, fertility, and growth-defense balance [60,61]. The biosynthesis, perception, transport, and signal transduction of MeJA have been extensively studied [59]. However, the roles of circRNAs in MeJA-mediated signaling pathways in A. thaliana have not been reported.…”

Section: Discussionmentioning

confidence: 99%

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Identification and Characterization of circRNAs Responsive to Methyl Jasmonate in Arabidopsis thaliana

Zhang

Liu

Zhu

et al. 2020

IJMS

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Circular RNAs (circRNAs) are endogenous noncoding RNAs with covalently closed continuous loop structures that are formed by 3 -5 ligation during splicing. These molecules are involved in diverse physiological and developmental processes in eukaryotic cells. Jasmonic acid (JA) is a critical hormonal regulator of plant growth and defense. However, the roles of circRNAs in the JA regulatory network are unclear. In this study, we performed high-throughput sequencing of Arabidopsis thaliana at 24 h, 48 h, and 96 h after methyl JA (MeJA) treatment. A total of 8588 circRNAs, which were distributed on almost all chromosomes, were identified, and the majority of circRNAs had lengths between 200 and 800 bp. We identified 385 differentially expressed circRNAs (DEcircRNAs) by comparing data between MeJA-treated and untreated samples. Gene Ontology (GO) enrichment analysis of the host genes that produced the DEcircRNAs showed that the DEcircRNAs are mainly involved in response to stimulation and metabolism. Additionally, some DEcircRNAs were predicted to act as miRNA decoys. Eight DEcircRNAs were validated by qRT-PCR with divergent primers, and the junction sites of five DEcircRNAs were validated by PCR analysis and Sanger sequencing. Our results provide insight into the potential roles of circRNAs in the MeJA regulation network.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Identification and Characterization of circRNAs Responsive to Methyl Jasmonate in Arabidopsis thaliana

Zhang

Liu

Zhu

et al. 2020

IJMS

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“…JA, its methyl ester (MeJA) and isoleucine conjugate (JA-Ile) are derivatives of a class of fatty acids collectively known as jasmonates (JAs) which are related with abiotic and biotic plant stress and involved in the regulation of plant growth and development [46] including promotion xylem development [47]. Thus, JAs is associated with plant defense against mechanical damage caused by insects [46,48] which can cause rapid and transient accumulation of JA and JA-Ile at the site of injury, thereby activating the expression of defense genes and producing a local defense response [46]. Also, JAs are precursor of volatile organic compounds (VOCs) which attract insect's herbivore natural enemies [49].…”

Section: Discussionmentioning

confidence: 99%

The Psyllids Triozoida Limbata Supplant the Defenses of Psidium Guajava Plants to Garentee Feeding and Protection

Picanço

Carmo

Azevedo

et al. 2020

Preprint

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Background: Herbivores cause biochemical, physiological, and morphological changes on plants. The ultimate effects of the herbivore activities are damages on the plant's body that can lead from local tissues death to the plant death. The intensity of herbivore attack and the plant's capability to defend itself determine the outcomes of herbivory. When the plant under attack has economic importance, such damages can diminish the productivity of the plantation and compromise the economy of families and the local communities. Although the adverse effects of herbivory on plants and economy are entirely known, some biological mechanisms underlying these damages remain unclear, especially at the anatomical and hormonal levels. The psyllid Triozoida limbata (Hemiptera: Triozidae) is a critical guava (Psidium guajava) pest in the Neotropical region, causing productivity plantation losses up to 55%. Psyllids cause visible morphological changes on guava leaves; however, there is a lack of detailed studied of the cellular, anatomical, and hormonal aspects of the subject. Thus, this work aimed to determine the alterations caused in guava leaves by T. limbata through anatomical and hormonal analyzes. Results: We found that the psyllid's nymphs feeding causes cells hypertrophy and hyperplasia determining the formation of the leaf-roll galls. Although there was no anatomical differentiation of the mesophilic tissues, the cells accumulate starch. Along with the anatomical changes, we observed increasing in the jasmonic acid and reduction of zeatin concentrations in the leaves. Conclusions: The alteration of phytohormone contents and the anatomical changes indicates that the feeding of T. limbata activates plant defenses, but it is not active toward the insects off. The insect nymphs live inside the leaf-roll galls until adults' phase, feeding on the guava leaves xylem and phloem. In commercial guava orchard, the control of T. limbata nymphs have been difficult. Thus, the understanding of the composition of this protective layer can help to find the most effective and efficient control solution for this pest.

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“…JA is conjugated to isoleucine by JAR1 to make the signaling-active JA-Ile that after translocation to the nucleus stimulates SCF COI1 -mediated ubiquitination of the transcription repressor, JAZ. Subsequent degradation of JAZ leads to transcription of JA-response genes [49]. Et is synthesized from S-adenosyl-methionine in a two-step reaction by ACC-synthase and ACC-oxidase [50].…”

Section: Hormones Amplify Immunitymentioning

confidence: 99%

A holistic view on plant effector-triggered immunity presented as an iceberg model

Thordal‐Christensen

2020

Cell. Mol. Life Sci.

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The immune system of plants is highly complex. It involves pattern-triggered immunity (PTI), which is signaled and manifested through branched multi-step pathways. To counteract this, pathogen effectors target and inhibit individual PTI steps. This in turn can cause specific plant cytosolic nucleotide-binding leucine-rich repeat (NLR) receptors to activate effectortriggered immunity (ETI). Plants and pathogens have many genes encoding NLRs and effectors, respectively. Yet, only a few segregate genetically as resistance (R) genes and avirulence (Avr) effector genes in wild-type populations. In an attempt to explain this contradiction, a model is proposed where far most of the NLRs, the effectors and the effector targets keep one another in a silent state. In this so-called "iceberg model", a few NLR-effector combinations are genetically visible above the surface, while the vast majority is hidden below. Besides, addressing the existence of many NLRs and effectors, the model also helps to explain why individual downregulation of many effectors causes reduced virulence and why many lesion-mimic mutants are found. Finally, the iceberg model accommodates genuine plant susceptibility factors as potential effector targets.

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Jasmonic Acid Signaling Pathway in Plants

Cited by 520 publications

References 100 publications

Identification and Characterization of circRNAs Responsive to Methyl Jasmonate in Arabidopsis thaliana

Identification and Characterization of circRNAs Responsive to Methyl Jasmonate in Arabidopsis thaliana

The Psyllids Triozoida Limbata Supplant the Defenses of Psidium Guajava Plants to Garentee Feeding and Protection

A holistic view on plant effector-triggered immunity presented as an iceberg model

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