Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis.

Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Research Abstract Details 

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Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Abstract Text:

Qingzhe Zhai,Chang-Bao Li,Wenguang Zheng,Xiaoyan Wu,Jiuhai Zhao,Guoxin Zhou,Hongling Jiang,Jiaqiang Sun,Yonggen Lou,Chuanyou Li,

An Arabidopsis mutant line named hy1-101 was isolated because it shows stunted root growth on medium containing low concentrations of jasmonic acid (JA). Subsequent investigation indicated that even in the absence of JA, hy1-101 plants exhibit shorter roots and express higher levels of a group of JA-inducible defense genes. Here, we show that the hy1-101 mutant has increased production of JA and its jasmonate-related phenotype is suppressed by the coi1-1 mutation that interrupts JA signaling. Gene cloning and genetic complementation analyses revealed that the hy1-101 mutant contains a mutation in the HY1 gene, which encodes a heme oxygenase essential for phytochrome chromophore biosynthesis. These results support a hypothesis that phytochrome chromophore deficiency leads to overproduction of JA and activates COI1-dependent JA responses. Indeed, we show that, like hy1-101, independent alleles of the phytochrome chromophore-deficient mutants, including hy1-100 and hy2 (CS68), also show elevated JA levels and constant expression of JA-inducible defense genes. We further provide evidence showing that, on the other hand, JA inhibits the expression of a group of light-inducible and photosynthesis-related genes. Together, these data imply that the JA-signaled defense pathway and phytochrome chromophore-mediated light signaling might have antagonistic effects on each other.

Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Publishing Authors By Initials

Q Zhai,CB Li,W Zheng,X Wu,J Zhao,G Zhou,H Jiang,J Sun,Y Lou,C Li,

For similar plants: plant components: plant roots research abstracts see: plants: plant components: plant roots research

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Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Plant & cell physiology

VOLUME: 48

Page Numbers: 1061-71

Journal Abbreviation: Plant Cell Physiol.

ISSN: 0032-0781

DAY: 13

MONTH: 06

YEAR: 2007

Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Information

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LANGUAGE: eng

NlmUniqueID: 9430925

Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Keywords Mesh Terms:

KEYWORDS: Plant Roots

MESH TERMS: growth & development

Chemical & Substance for Abstract: Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis. Information

Substance Name: HY2 protein, Arabidopsis

Registry Number: EC 1.3.7.4

Grant and Affiliation Information for Phytochrome chromophore deficiency leads to overproduction of jasmonic acid and elevated expression of jasmonate-responsive genes in Arabidopsis.

AFFILIATION: State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, PR China.

Country: Japan

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MEDLINETA: Plant Cell Physiol

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