論文

査読有り 国際誌
2018年9月11日

Transcriptional switch for programmed cell death in pith parenchyma of sorghum stems.

Proceedings of the National Academy of Sciences of the United States of America
  • Masaru Fujimoto
  • Takashi Sazuka
  • Yoshihisa Oda
  • Hiroyuki Kawahigashi
  • Jianzhong Wu
  • Hideki Takanashi
  • Takayuki Ohnishi
  • Jun-Ichi Yoneda
  • Motoyuki Ishimori
  • Hiromi Kajiya-Kanegae
  • Ken-Ichiro Hibara
  • Fumiko Ishizuna
  • Kazuo Ebine
  • Takashi Ueda
  • Tsuyoshi Tokunaga
  • Hiroyoshi Iwata
  • Takashi Matsumoto
  • Shigemitsu Kasuga
  • Jun-Ichi Yonemaru
  • Nobuhiro Tsutsumi
  • 全て表示

115
37
開始ページ
E8783-E8792
終了ページ
E8792
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1073/pnas.1807501115

Pith parenchyma cells store water in various plant organs. These cells are especially important for producing sugar and ethanol from the sugar juice of grass stems. In many plants, the death of pith parenchyma cells reduces their stem water content. Previous studies proposed that a hypothetical D gene might be responsible for the death of stem pith parenchyma cells in Sorghum bicolor, a promising energy grass, although its identity and molecular function are unknown. Here, we identify the D gene and note that it is located on chromosome 6 in agreement with previous predictions. Sorghum varieties with a functional D allele had stems enriched with dry, dead pith parenchyma cells, whereas those with each of six independent nonfunctional D alleles had stems enriched with juicy, living pith parenchyma cells. D expression was spatiotemporally coupled with the appearance of dead, air-filled pith parenchyma cells in sorghum stems. Among D homologs that are present in flowering plants, Arabidopsis ANAC074 also is required for the death of stem pith parenchyma cells. D and ANAC074 encode previously uncharacterized NAC transcription factors and are sufficient to ectopically induce programmed death of Arabidopsis culture cells via the activation of autolytic enzymes. Taken together, these results indicate that D and its Arabidopsis ortholog, ANAC074, are master transcriptional switches that induce programmed death of stem pith parenchyma cells. Thus, targeting the D gene will provide an approach to breeding crops for sugar and ethanol production.

リンク情報
DOI
https://doi.org/10.1073/pnas.1807501115
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/30150370
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6140496
ID情報
  • DOI : 10.1073/pnas.1807501115
  • ISSN : 0027-8424
  • PubMed ID : 30150370
  • PubMed Central 記事ID : PMC6140496

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