Systemin‐mediated Long‐distance Systemic Defense Responses

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The Tomato Suppressor of prosystemin-mediated responses2 Gene

that genes required for (pro)systemin-mediated signaling also are essential for wound-induced expression of Pl and other de-fense-related genes (Howe et al., 1996; Howe and Ryan, 1999; Li et al., 2001; Lee and Howe, 2003). The Tomato Suppressor of prr)systemin-mediated responses2 Gene Encodes a Fatty Acid Desaturase Required for the

June 2020 Vol. 226 No. 6 - Wiley Online Library

1573 Systemin-mediated long-distance systemic defense responses H. Zhang, H. Zhang & J. Lin Research Rapid reports 1583 Reduction in lumen area is associated with the δ18O exchange between sugars and source water during cellulose synthesis P. Szejner, T. Clute, E. Anderson, M. N. Evans & J. Hu Full papers

The Tomato Suppressor of prosystemin-mediated responses2 Gene

Biosynthesis of Jasmonic Acid and the Production of a Systemic Wound Signal for Defense Gene Expression Chuanyou Li, a Guanghui Liu, a Changcheng Xu, b Gyu In Lee, a Petra Bauer, c Hong-Qing Ling, d Martin W. Ganal, c,1 and Gregg A. Howe a,b,2 a Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan

Tomato MAPKs LeMPK1, LeMPK2, and LeMPK3 function in the

reduction of defense gene expression as cosilencing of MPK1 and MPK2, indicating that gene dosage effects may be important for MPK signaling. In addition, VIGS of the closely related MPK3 also reduced systemin-induced defense responses. The function of MPK1/2 and orthologs in pathogen-induced defenses is well es-tablished.

Convergence of Signaling Pathways Induced by Systemin

The systemin-mediated wound response in tomato plants is a well-investigated stress response. Syste-min, an 18-amino acid wound-signaling peptide, is produced at wound sites in response to attack by herbivorous insects, and is perceived by the systemin receptor SR160, a Leu-rich repeat receptor kinase (Scheer and Ryan, 2002). Systemin is

The Plant Journal (2003) 33 The tomato mutant spr1 is

estingly, wound-induced local and systemic expression of these early genes was not affected in spr1 plants (Figure2). These results indicate that spr1 specifically affects the expression of late-response genes (i.e. PI genes). spr1 plants are impaired in systemin-mediated signaling To gain additional insight into the wound response phe-