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Karre, Shailesh; Kim, Saet-Byul; Kim, Bong-Suk; Khangura, Rajdeep S.; Sermons, Shannon M.; Dilkes, Brian; Johal, Guri; Balint-Kurti, Peter

Maize Plants Chimeric for an Autoactive Resistance Gene Display a Cell-Autonomous Hypersensitive Response but Non–Cell Autonomous Defense Signaling

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  • Medientyp: E-Artikel
  • Titel: Maize Plants Chimeric for an Autoactive Resistance Gene Display a Cell-Autonomous Hypersensitive Response but Non–Cell Autonomous Defense Signaling
  • Beteiligte: Karre, Shailesh; Kim, Saet-Byul; Kim, Bong-Suk; Khangura, Rajdeep S.; Sermons, Shannon M.; Dilkes, Brian; Johal, Guri; Balint-Kurti, Peter
  • Erschienen: Scientific Societies, 2021
  • Erschienen in: Molecular Plant-Microbe Interactions®, 34 (2021) 6, Seite 606-616
  • Sprache: Englisch
  • DOI: 10.1094/mpmi-04-20-0091-r
  • ISSN: 0894-0282; 1943-7706
  • Schlagwörter: Agronomy and Crop Science ; General Medicine ; Physiology
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  • Beschreibung: <jats:p>The maize gene Rp1-D21 is a mutant form of the gene Rp1-D that confers resistance to common rust. Rp1-D21 triggers a spontaneous defense response that occurs in the absence of the pathogen and includes a programed cell death called the hypersensitive response (HR). Eleven plants heterozygous for Rp1-D21, in four different genetic backgrounds, were identified that had chimeric leaves with lesioned sectors showing HR abutting green nonlesioned sectors lacking HR. The Rp1-D21 sequence derived from each of the lesioned portions of leaves was unaltered from the expected sequence whereas the Rp1-D21 sequences from nine of the nonlesioned sectors displayed various mutations, and we were unable to amplify Rp1-D21 from the other two nonlesioned sectors. In every case, the borders between the sectors were sharp, with no transition zone, suggesting that HR and chlorosis associated with Rp1-D21 activity was cell autonomous. Expression of defense response marker genes was assessed in the lesioned and nonlesioned sectors as well as in near-isogenic plants lacking and carrying Rp1-D21. Defense gene expression was somewhat elevated in nonlesioned sectors abutting sectors carrying Rp1-D21 compared with near-isogenic plants lacking Rp1-D21. This suggests that, whereas the HR itself was cell autonomous, other aspects of the defense response initiated by Rp1-D21 were not.</jats:p><jats:p>[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .</jats:p>
  • Zugangsstatus: Freier Zugang