Jasmonate-related mutants of Arabidopsis as tools for studying stress signaling

Berger, Susanne

doi:10.1007/s00425-001-0688-y

Cited by 121 publications

(74 citation statements)

References 59 publications

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“…This hormonal network has been progressively dissected using reporter genes for specific pathways as well as hormone signaling mutants and transcriptomic approaches (Berger, 2002;Van Zhong and Burns, 2003). ET production is unlikely to occur during long-term K 1 starvation since ETbiosynthesis and ET-responsive genes such as ACO2 and ERS1 (Gomez-Lim et al, 1993;Hua et al, 1998) were not changed in our treatments.…”

Section: Discussionmentioning

confidence: 99%

The Potassium-Dependent Transcriptome of Arabidopsis Reveals a Prominent Role of Jasmonic Acid in Nutrient Signaling

2004

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Full genome microarrays were used to assess transcriptional responses of Arabidopsis seedlings to changing external supply of the essential macronutrient potassium (K+). Rank product statistics and iterative group analysis were employed to identify differentially regulated genes and statistically significant coregulated sets of functionally related genes. The most prominent response was found for genes linked to the phytohormone jasmonic acid (JA). Transcript levels for the JA biosynthetic enzymes lipoxygenase, allene oxide synthase, and allene oxide cyclase were strongly increased during K+ starvation and quickly decreased after K+ resupply. A large number of well-known JA responsive genes showed the same expression profile, including genes involved in storage of amino acids (VSP), glucosinolate production (CYP79), polyamine biosynthesis (ADC2), and defense (PDF1.2). Our findings highlight a novel role of JA in nutrient signaling and stress management through a variety of physiological processes such as nutrient storage, recycling, and reallocation. Other highly significant K+-responsive genes discovered in our study encoded cell wall proteins (e.g. extensins and arabinogalactans) and ion transporters (e.g. the high-affinity K+ transporter HAK5 and the nitrate transporter NRT2.1) as well as proteins with a putative role in Ca2+ signaling (e.g. calmodulins). On the basis of our results, we propose candidate genes involved in K+ perception and signaling as well as a network of molecular processes underlying plant adaptation to K+ deficiency.

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Section: Discussionmentioning

confidence: 99%

The Potassium-Dependent Transcriptome of Arabidopsis Reveals a Prominent Role of Jasmonic Acid in Nutrient Signaling

2004

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“…Further processing by allene oxide synthase and allene oxide cyclase results in 12-oxophytodienoic acid and further reduction to 12-oxophytoenoic acid. Subsequent carboxyl chain shortening by β-oxidation results in the formation of JA (Berger, 2002).…”

Section: Jasmonic Acid-and Ethylene-dependent Resistance Pathwaymentioning

confidence: 99%

Engineering disease resistance in plants

Stuiver

Custers

2001

Nature

118

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“…Jasmonic acid (JA) is an important regulator in response to environmental stresses such as ozone exposure, wounding, water deficit, and pathogen and pest attack (Berger, 2002;Devoto and Turner, 2003). In Arabidopsis, mechanical and biotic wounding activates independent signaling pathways regulating different sets of target genes either at the injury or the systemic site (Leon et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis

et al. 2007

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The plant hormone jasmonic acid (JA) plays a key role in the environmental stress responses and developmental processes of plants. Although ATMYC2/JASMONATE-INSENSITIVE1 (JIN1) is a major positive regulator of JA-inducible gene expression and essential for JA-dependent developmental processes in Arabidopsis thaliana, molecular mechanisms underlying the control of ATMYC2/JIN1 expression remain largely unknown. Here, we identify a mitogen-activated protein kinase (MAPK) cascade, MAPK KINASE 3 (MKK3)-MAPK 6 (MPK6), which is activated by JA in Arabidopsis. We also show that JA negatively controls ATMYC2/JIN1 expression, based on quantitative RT-PCR and genetic analyses using gain-of-function and loss-offunction mutants of the MKK3-MPK6 cascade. These results indicate that this kinase unit plays a key role in JA-dependent negative regulation of ATMYC2/JIN1 expression. Both positive and negative regulation by JA may be used to fine-tune ATMYC2/JIN1 expression to control JA signaling. Moreover, JA-regulated root growth inhibition is affected by mutations in the MKK3-MPK6 cascade, which indicates important roles in JA signaling. We provide a model explaining how MPK6 can convert three distinct signals-JA, pathogen, and cold/salt stress-into three different sets of responses in Arabidopsis.

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Jasmonate-related mutants of Arabidopsis as tools for studying stress signaling

Cited by 121 publications

References 59 publications

The Potassium-Dependent Transcriptome of Arabidopsis Reveals a Prominent Role of Jasmonic Acid in Nutrient Signaling

The Potassium-Dependent Transcriptome of Arabidopsis Reveals a Prominent Role of Jasmonic Acid in Nutrient Signaling

Engineering disease resistance in plants

The Mitogen-Activated Protein Kinase Cascade MKK3–MPK6 Is an Important Part of the Jasmonate Signal Transduction Pathway in Arabidopsis

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