Salt stress response triggers activation of the jasmonate signaling pathway leading to inhibition of cell elongation in Arabidopsis primary root

Valenzuela, Camilo E.; Acevedo-Acevedo, Orlando; Miranda, Giovanna S.; Vergara-Barros, Pablo; Holuigue, Loreto; Figueroa, Carlos R.; Figueroa, Pablo

doi:10.1093/jxb/erw202

Cited by 158 publications

(116 citation statements)

References 58 publications

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“…Nevertheless, the underlying mechanisms by which JA synthesis is controlled by ABA are not well understood. During abiotic stress, rising ABA levels induce JA synthesis, which synergistically optimizes plant abiotic defenses by altering the plant transcriptome, possibly facilitating stomata closure, inhibiting cell division, and epigenetically modifying defense genes during dehydration responses (Murata et al, 2015;Riemann et al, 2015;Liu et al, 2016;Valenzuela et al, 2016). A basic-helix-loop-helix transcription factor MYC2 plays roles in both JA and ABA signaling and has been proposed as one of the factors linking ABA and JA signaling (Kazan and Manners, 2013;Aleman et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Two Abscisic Acid-Responsive Plastid Lipase Genes Involved in Jasmonic Acid Biosynthesis in Arabidopsis thaliana

et al. 2018

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Chloroplast membranes with their unique lipid composition are crucial for photosynthesis. Maintenance of the chloroplast membranes requires finely tuned lipid anabolic and catabolic reactions. Despite the presence of a large number of predicted lipid-degrading enzymes in the chloroplasts, their biological functions remain largely unknown. Recently, we described PLASTID LIPASE1 (PLIP1), a plastid phospholipase A that contributes to seed oil biosynthesis. The genome encodes two putative PLIP1 paralogs, which we designated PLIP2 and PLIP3. PLIP2 and PLIP3 are also present in the chloroplasts, but likely with different subplastid locations. In vitro analysis indicated that both are glycerolipid A lipases. In vivo, PLIP2 prefers monogalactosyldiacylglycerol as substrate and PLIP3 phosphatidylglycerol. Overexpression of or severely reduced plant growth and led to accumulation of the bioactive form of jasmonate and related oxylipins. Genetically blocking jasmonate perception restored the growth of the -overexpressing plants. The expression of and , but not, was induced by abscisic acid (ABA), and triple mutants exhibited compromised oxylipin biosynthesis in response to ABA. The triple mutants also showed hypersensitivity to ABA. We propose that PLIP2 and PLIP3 provide a mechanistic link between ABA-mediated abiotic stress responses and oxylipin signaling.

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Section: Introductionmentioning

confidence: 99%

Two Abscisic Acid-Responsive Plastid Lipase Genes Involved in Jasmonic Acid Biosynthesis in Arabidopsis thaliana

et al. 2018

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“…Phytohormones are the key regulators of plant growth and development and act as mediators of environmental stress responses [5]. Plenty study showed that jasmonic acid (JA) was involved in various processes such as plant growth, reproductive output as well as stress resistance [12,13]. Our study showed that two genes from ZQUA44 encoding lipoxygenase (LOX), an important enzyme catalyzing linolenic acid into [17].…”

Section: Discussionmentioning

confidence: 85%

Comparative transcriptome analysis between high- and low-growth genotypes of Eucalyptus in response to nutrient stress

Yang¹,

Zhang²,

Zhang³

et al. 2020

Preprint

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Background: The role of macro and micro nutrients have been reported in various plant. However, in perennial trees, the function of multiple elements to different genotypes remain to be elucidated. This study aimed at deciphering the genetic architecture of physiological differences under different nutrient levels between the high- and low-growth genotypes. Results: Our results showed that growth traits of both genotypes at nutrient starvation treatment was much lower than that at nutrient abundant treatment, indicating that nutrient is essential for plant growth. However, tree height, crown width, and fresh weight of different tissues of ZQUA44 were much higher than that of ZQUB15 at the three nutrient levels, implicating the genetic basis of different trees is another factor that varied the phenotypic performance. The differentially expressed genes (DEGs) were clustered into 6 subclusters depending on different expression pattern. Functional annotation of DEGs from different subclusters showed that DEGs involved in glutathione metabolism, flavonoid biosynthesis and stilbenoid, diarylheptanoid and gingerol biosynthesis may responsible for nutrient starvation across different genotypes, while DEGs involved in carotenoid biosynthesis and starch and sucrose metabolism may have diverse function in different genotypes. The DEGs encoding MYB_related may responsible for nutrient deficiency of all the genotypes, while B3 may play different functions in different genotypes. Conclusion: Our results demonstrate that different genotypes may form different metabolic pathways to coordinate plant keeping survival when they face abiotic stresses. Furthermore, we elucidate DEGs that may widely responsible for nutrient deficiency in different treatments and DEGs that play different functions in different genotypes. Finally, our funding provide adequate nutrient supply for Eucalyptus.

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“…A recent study also shows that the effect of salt on inhibiting root growth is mediated by JA [16]. Therefore, we wanted to know if OsWRKY42 enhances salt stress tolerance by modulating expression of genes in the JA response pathway.…”

Section: Resultsmentioning

confidence: 99%

Overexpression of a cell wall damage induced transcription factor, OsWRKY42, leads to enhanced callose deposition and tolerance to salt stress but does not enhance tolerance to bacterial infection

et al. 2018

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BackgroundMembers of the WRKY gene family play important roles in regulating plant responses to abiotic and biotic stresses. Treatment with either one of the two different cell wall degrading enzymes (CWDEs), LipaseA and CellulaseA, induces immune responses and enhances the expression of OsWRKY42 in rice. However, the role of OsWRKY42 in CWDE induced immune responses is not known.ResultsExpression of the rice transcription factor OsWRKY42 is induced upon treatment of rice leaves with CWDEs, wounding and salt. Overexpression of OsWRKY42 leads to enhanced callose deposition in rice and Arabidopsis but this does not enhance tolerance to bacterial infection. Upon treatment with NaCl, Arabidopsis transgenic plants expressing OsWRKY42 exhibited high levels of anthocyanin and displayed enhanced tolerance to salt stress. Treatment with either cellulase or salt induced the expression of several genes involved in JA biosynthesis and response in Arabidopsis. Ectopic expression of OsWRKY42 results in reduced expression of cell wall damage and salt stress induced jasmonic acid biosynthesis and response genes. OsWRKY42 expressing Arabidopsis lines exhibited enhanced tolerance to methyl jasmonate mediated growth inhibition.ConclusionThe results presented here suggest that OsWRKY42 regulates plant responses to either cell wall damage or salinity stress by acting as a negative regulator of jasmonic acid mediated responses.Electronic supplementary materialThe online version of this article (10.1186/s12870-018-1391-5) contains supplementary material, which is available to authorized users.

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Salt stress response triggers activation of the jasmonate signaling pathway leading to inhibition of cell elongation in Arabidopsis primary root

Abstract: HighlightThis study identifies that salt-inhibited root growth partially involves the activation of the jasmonate signaling pathway in Arabidopsis.

Cited by 158 publications

References 58 publications

Two Abscisic Acid-Responsive Plastid Lipase Genes Involved in Jasmonic Acid Biosynthesis in Arabidopsis thaliana

Two Abscisic Acid-Responsive Plastid Lipase Genes Involved in Jasmonic Acid Biosynthesis in Arabidopsis thaliana

Comparative transcriptome analysis between high- and low-growth genotypes of Eucalyptus in response to nutrient stress

Overexpression of a cell wall damage induced transcription factor, OsWRKY42, leads to enhanced callose deposition and tolerance to salt stress but does not enhance tolerance to bacterial infection

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