Plant Physiol. Illumina
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on October 27, 2006; 10.1104/pp.106.089755

This Article
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow Supplemental Data
Right arrow All Versions of this Article:
142/4/1751    most recent
pp.106.089755v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (18)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Schmidt, S.
Right arrow Articles by Baldwin, I. T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Schmidt, S.
Right arrow Articles by Baldwin, I. T.
Agricola
Right arrow Articles by Schmidt, S.
Right arrow Articles by Baldwin, I. T.

Received September 12, 2006
Accepted October 22, 2006

Systemin in black Nightshade (Solanum nigrum). The Tomato-homologous Polypeptide Does not Mediate Direct Defense Responses

Silvia Schmidt and Ian T. Baldwin *

Max Planck Institute for Chemical Ecology, Department of Molecular Ecology, Beutenberg Campus, Hans-Knöll-Str. 8, 07745 Jena, Germany

* Corresponding author; email: Baldwin{at}ice.mpg.de.

We extend Ryan's seminal work on the 18-aa polypeptide, systemin, in tomato's systemic wound response to the closely related solanaceaous species, Solanum nigrum. We compared wild-type (WT) plants to plants transformed with an inverted repeat prosystemin construct (IRSys) to silence the expression of the endogenous S. nigrum prosystemin gene. In WT plants elicited with wounding + oral secretions (OS) from Manduca sexta larvae, trypsin-proteinase inhibitors (TPIs) accumulated even though prosystemin transcripts were down-regulated. Neither reducing the endogenous systemin levels by RNAi nor complementing the plants with systemin by exogenously supplying the polypeptide through excised stems significantly increased TPI activity, indicating that systemin and TPIs are not correlated in S. nigrum. The performance of two herbivore species from two feeding guilds, Manduca sexta larvae and Myzus persicae nicotianae, did not differ between WT and IRSys plants, demonstrating that varying endogenous systemin levels do not alter the direct defenses of S. nigrum. Field experiments with WT and IRSys plants and the flea beetle Epitrix pubescens supported these glasshouse data. That levels of OS-elicited jasmonic acid (JA) did not differ between WT and IRSys plants suggests that systemin is unlikely to mediate jasmonate signaling in S. nigrum as it does in tomato. We conclude that the tomato-homologous polypeptide does not mediate direct defense responses in S. nigrum.




This article has been cited by other articles:


Home page
 Plant Physiol.Home page
G. Pearce, R. Bhattacharya, Y.-C. Chen, G. Barona, Y. Yamaguchi, and C. A. Ryan
Isolation and Characterization of Hydroxyproline-Rich Glycopeptide Signals in Black Nightshade Leaves
Plant Physiology, July 1, 2009; 150(3): 1422 - 1433.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
B. Berger and I. T. Baldwin
Silencing the Hydroxyproline-Rich Glycopeptide Systemin Precursor in Two Accessions of Nicotiana attenuata Alters Flower Morphology and Rates of Self-Pollination
Plant Physiology, April 1, 2009; 149(4): 1690 - 1700.
[Abstract] [Full Text] [PDF]

Home page
 ANN BOT (LOND)Home page
C. Wasternack
Jasmonates: An Update on Biosynthesis, Signal Transduction and Action in Plant Stress Response, Growth and Development
Ann. Bot., October 1, 2007; 100(4): 681 - 697.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 2006 by the American Society of Plant Biologists