Pith–specific lignification in Nicotiana attenuata as a defense against a stem–boring herbivore
- Max Planck Inst. for Chemical Ecology, Jena (Germany); Korea Advanced Inst. for Science and Technology, Daejeon (Korea); Chungbuk National Univ., Cheongju (Korea); Max Planck Institute for Chemical Ecology Department of Molecular Ecology
- Univ. of Wisconsin, Madison, WI (United States)
- Korea Advanced Inst. for Science and Technology, Daejeon (Korea)
- Max Planck Inst. for Chemical Ecology, Jena (Germany); Korea Advanced Inst. for Science and Technology, Daejeon (Korea)
- Max Planck Inst. for Chemical Ecology, Jena (Germany)
- Graduate School of International Agricultural Technology Seoul National University Pyoeng‐Chang 25354 Korea
- Seoul National Univ., Pyoeng‐Chang (Korea)
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. Furthermore, these results suggest that lignin provides a stem-specific inducible barrier, protecting plants against stem-boring insects.
- Research Organization:
- Great Lakes Bioenergy Research Center, Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0018409
- OSTI ID:
- 1827412
- Journal Information:
- New Phytologist, Journal Name: New Phytologist Journal Issue: 1 Vol. 232; ISSN 0028-646X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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