The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform

Susheng Song - One of the best experts on this subject based on the ideXlab platform.

  • new perspective of the bhlh myb complex in jasmonate regulated Plant Fertility in arabidopsis
    Plant Signaling & Behavior, 2016
    Co-Authors: Xi Chen, Huang Huang, Tiancong Qi, Susheng Song
    Abstract:

    Jasmonates (JAs) are a class of Plant hormones, essential in Plant development and defense. JA induces the interaction of the JA receptor Coronatine Insensitive 1 with jasmonate ZIM-domain (JAZ) proteins, and promotes subsequent JAZs degradation, leading to the release of downstream factors and activation of diverse Plant development and defense processes. We recently revealed that the IIIe bHLH transcription factors MYC2, MYC3, MYC4 and MYC5 interact with the MYB transcription factors MYB21 and MYB24 to form the bHLH-MYB complex, and JAZs repress the bHLH-MYB complex to regulate JA-mediated stamen development. Here, we further discuss the different properties of the components of the bHLH-MYB complex in expression pattern and stamen regulation.

  • Regulation of Jasmonate-Mediated Stamen Development and Seed Production by a bHLH-MYB Complex in Arabidopsis
    The Plant Cell, 2015
    Co-Authors: Tiancong Qi, Huang Huang, Susheng Song
    Abstract:

    Stamens are the Plant male reproductive organs essential for Plant Fertility. Proper development of stamens is modulated by environmental cues and endogenous hormone signals. Deficiencies in biosynthesis or perception of the phytohormone jasmonate (JA) attenuate stamen development, disrupt male Fertility, and abolish seed production in Arabidopsis thaliana . This study revealed that JA-mediated stamen development and seed production are regulated by a bHLH-MYB complex. The IIIe basic helix-loop-helix (bHLH) transcription factor MYC5 acts as a target of JAZ repressors to function redundantly with other IIIe bHLH factors such as MYC2, MYC3, and MYC4 in the regulation of stamen development and seed production. The myc2 myc3 myc4 myc5 quadruple mutant exhibits obvious defects in stamen development and significant reduction in seed production. Moreover, these IIIe bHLH factors interact with the MYB transcription factors MYB21 and MYB24 to form a bHLH-MYB transcription complex and cooperatively regulate stamen development. We speculate that the JAZ proteins repress the bHLH-MYB complex to suppress stamen development and seed production, while JA induces JAZ degradation and releases the bHLH-MYB complex to subsequently activate the expression of downstream genes essential for stamen development and seed production.

John Browse - One of the best experts on this subject based on the ideXlab platform.

  • Jasmonate Passes Muster: A Receptor and Targets for the Defense Hormone
    Annual Review of Plant Biology, 2009
    Co-Authors: John Browse
    Abstract:

    The oxylipin jasmonate (JA) regulates many aspects of growth, development, and environmental responses in Plants, particularly defense responses against herbivores and necrotrophic pathogens. Mutants of Arabidopsis helped researchers define the biochemical pathway for synthesis of jasmonoyl-isoleucine (JA-Ile), the active form of JA hormone, and demonstrated that JA is required for Plant survival of insect and pathogen attacks and for Plant Fertility. Transcriptional profiling led to the discovery of the JASMONATE ZIM-DOMAIN (JAZ) proteins, which are repressors of JA signaling. JA-Ile relieves repression by promoting binding of the JAZ proteins to the F-box protein CORONATINE INSENSITIVE1 (COI1) and their subsequent degradation by the ubiquitination/26S-proteasome pathway. Although we now have a much better understanding of the molecular mechanism of JA action, many questions remain. Experimental answers to these questions will expand our knowledge of oxylipin signaling in Plants and animals and will also...

  • Jasmonate Passes Muster: A Receptor and Targets for the Defense Hormone
    Annual Review of Plant Biology, 2009
    Co-Authors: John Browse
    Abstract:

    The oxylipin jasmonate (JA) regulates many aspects of growth, development, and environmental responses in Plants, particularly defense responses against herbivores and necrotrophic pathogens. Mutants of Arabidopsis helped researchers define the biochemical pathway for synthesis of jasmonoyl-isoleucine (JA-Ile), the active form of JA hormone, and demonstrated that JA is required for Plant survival of insect and pathogen attacks and for Plant Fertility. Transcriptional profiling led to the discovery of the JASMONATE ZIM-DOMAIN (JAZ) proteins, which are repressors of JA signaling. JA-Ile relieves repression by promoting binding of the JAZ proteins to the F-box protein CORONATINE INSENSITIVE1 (COI1) and their subsequent degradation by the ubiquitination/26S-proteasome pathway. Although we now have a much better understanding of the molecular mechanism of JA action, many questions remain. Experimental answers to these questions will expand our knowledge of oxylipin signaling in Plants and animals and will also provide new tools for efforts to improve crop protection and reproductive performance.

Ghansham B. Dixit - One of the best experts on this subject based on the ideXlab platform.

  • EMS, sodium azide and gamma rays induced meiotic anomalies in Delphinium malabaricum
    2014
    Co-Authors: Firdose R. Kolar, Ghansham B. Dixit
    Abstract:

    Meiotic cell division is a dynamic cellular process controlled by a large number of genes that act from premeiotic to postmeiotic mitosis. Mutation in these genes may cause anomalies that impair Plant Fertility. In this study, an attempt has therefore been made to understand the effects of ethyl methane sulfonate (EMS), sodium azide (SA) and gamma rays on the meiotic configuration of Delphinium malabaricum. The results demonstrated that the mutagens cause various types of cytological aberrations, such as univalents, chromatin bridges, laggards, fragments, stickiness and multinucleated cells. The maximum aberrations were found at higher doses/concentrations of the mutagens. The highest percentage of pollen mother cells showing abnormalities was induced by EMS followed by gamma rays and SA. The mutagen impact on chromosomal anomalies increased the frequency of pollen sterility.

  • EMS, sodium azide and gamma rays induced meiotic anomalies in Delphinium malabaricum (Huth) Munz
    Israel Journal of Plant Sciences, 2013
    Co-Authors: Firdose R. Kolar, Ghansham B. Dixit
    Abstract:

    Meiotic cell division is a dynamic cellular process controlled by a large number of genes that act from premeiotic to postmeiotic mitosis. Mutation in these genes may cause anomalies that impair Plant Fertility. In this study, an attempt has therefore been made to understand the effects of ethyl methane sulfonate (EMS), sodium azide (SA) and gamma rays on the meiotic configuration of Delphinium malabaricum. The results demonstrated that the mutagens cause various types of cytological aberrations, such as univalents, chromatin bridges, laggards, fragments, stickiness and multinucleated cells. The maximum aberrations were found at higher doses/concentrations of the mutagens. The highest percentage of pollen mother cells showing abnormalities was induced by EMS followed by gamma rays and SA. The mutagen impact on chromosomal anomalies increased the frequency of pollen sterility.

Xi Chen - One of the best experts on this subject based on the ideXlab platform.

  • new perspective of the bhlh myb complex in jasmonate regulated Plant Fertility in arabidopsis
    Plant Signaling & Behavior, 2016
    Co-Authors: Xi Chen, Huang Huang, Tiancong Qi, Susheng Song
    Abstract:

    Jasmonates (JAs) are a class of Plant hormones, essential in Plant development and defense. JA induces the interaction of the JA receptor Coronatine Insensitive 1 with jasmonate ZIM-domain (JAZ) proteins, and promotes subsequent JAZs degradation, leading to the release of downstream factors and activation of diverse Plant development and defense processes. We recently revealed that the IIIe bHLH transcription factors MYC2, MYC3, MYC4 and MYC5 interact with the MYB transcription factors MYB21 and MYB24 to form the bHLH-MYB complex, and JAZs repress the bHLH-MYB complex to regulate JA-mediated stamen development. Here, we further discuss the different properties of the components of the bHLH-MYB complex in expression pattern and stamen regulation.

Tiancong Qi - One of the best experts on this subject based on the ideXlab platform.

  • new perspective of the bhlh myb complex in jasmonate regulated Plant Fertility in arabidopsis
    Plant Signaling & Behavior, 2016
    Co-Authors: Xi Chen, Huang Huang, Tiancong Qi, Susheng Song
    Abstract:

    Jasmonates (JAs) are a class of Plant hormones, essential in Plant development and defense. JA induces the interaction of the JA receptor Coronatine Insensitive 1 with jasmonate ZIM-domain (JAZ) proteins, and promotes subsequent JAZs degradation, leading to the release of downstream factors and activation of diverse Plant development and defense processes. We recently revealed that the IIIe bHLH transcription factors MYC2, MYC3, MYC4 and MYC5 interact with the MYB transcription factors MYB21 and MYB24 to form the bHLH-MYB complex, and JAZs repress the bHLH-MYB complex to regulate JA-mediated stamen development. Here, we further discuss the different properties of the components of the bHLH-MYB complex in expression pattern and stamen regulation.

  • Regulation of Jasmonate-Mediated Stamen Development and Seed Production by a bHLH-MYB Complex in Arabidopsis
    The Plant Cell, 2015
    Co-Authors: Tiancong Qi, Huang Huang, Susheng Song
    Abstract:

    Stamens are the Plant male reproductive organs essential for Plant Fertility. Proper development of stamens is modulated by environmental cues and endogenous hormone signals. Deficiencies in biosynthesis or perception of the phytohormone jasmonate (JA) attenuate stamen development, disrupt male Fertility, and abolish seed production in Arabidopsis thaliana . This study revealed that JA-mediated stamen development and seed production are regulated by a bHLH-MYB complex. The IIIe basic helix-loop-helix (bHLH) transcription factor MYC5 acts as a target of JAZ repressors to function redundantly with other IIIe bHLH factors such as MYC2, MYC3, and MYC4 in the regulation of stamen development and seed production. The myc2 myc3 myc4 myc5 quadruple mutant exhibits obvious defects in stamen development and significant reduction in seed production. Moreover, these IIIe bHLH factors interact with the MYB transcription factors MYB21 and MYB24 to form a bHLH-MYB transcription complex and cooperatively regulate stamen development. We speculate that the JAZ proteins repress the bHLH-MYB complex to suppress stamen development and seed production, while JA induces JAZ degradation and releases the bHLH-MYB complex to subsequently activate the expression of downstream genes essential for stamen development and seed production.