한빛사논문
- 조회547
Youngsung Joo1,2,3*, Hoon Kim4,5*, Moonyoung Kang2, Gisuk Lee1,2, Sungjun Choung2, Harleen Kaur1, Shinyoung Oh6, Jun Weon Choi6, John Ralph4,5, Ian T. Baldwin1 and Sang-Gyu Kim2
1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Kn€oll-Straße 8, Jena 07745, Germany; 2Department of Biological Sciences, Korea Advanced Institute for Science and Technology, Daejeon 34141, Korea; 3Department of Biology, Chungbuk National University, Cheongju 28644, Korea; 4Department of Energy Great Lakes Bioenergy ResearchCenter, Wisconsin Energy Institute, University of Wisconsin-Madison, 1552 University Ave., Madison, WI 53726, USA; 5Department of Biochemistry, University of Wisconsin-Madison,1552 University Ave., Madison, WI 53726, USA; 6Graduate School of International Agricultural Technology, Seoul National University, Pyoeng-Chang 25354, Korea
*These authors equally contributed to this work.
Authors for correspondence: Youngsung Joo, Ian T. Baldwin, Sang-Gyu Kim
Abstract
Plants have developed tissue-specific defense strategies in response to various herbivores with different feeding habits. Although defense responses to leaf-chewing insects have been well studied, little is known about stem-specific responses, particularly in the pith, to stem-boring herbivores. To understand the stem-specific defense, we first conducted a comparative transcriptomic analysis of the wild tobacco Nicotiana attenuata before and after attack by the leaf-chewing herbivore Manduca sexta and the stem borer Trichobaris mucorea. When the stem-boring herbivore attacked, lignin-associated genes were upregulated specifically in the inner parenchymal cells of the stem, the pith; lignin also accumulated highly in the attacked pith. Silencing the lignin biosynthetic gene cinnamyl alcohol dehydrogenase enhanced the performance of the stem-boring herbivore but had no effect on the growth of the leaf-chewing herbivore. Two-dimensional nuclear magnetic resonance results revealed that lignified pith contains feruloyltyramine as an unusual lignin component in the cell wall, as a response against stem-boring herbivore attack. Pith-specific lignification induced by the stem-boring herbivore was modulated by both jasmonate and ethylene signaling. These results suggest that lignin provides a stem-specific inducible barrier, protecting plants against stem-boring insects.
논문정보
- Research article
- 2021년 10월 (BRIC 등록일 2021-11-02)
- 국내(교신)+국외 연구진
- 생명과학 > 식물학
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