Article Addendum

Identification of defense-related genes newly-associated with tomato flower abscission

Volume 6, Issue 4   April 2011
Pages 590 - 593
http://dx.doi.org/10.4161/psb.6.4.15043
Authors: Shimon Meir, Sonia Philosoph-Hadas, Srivignesh Sundaresan, K.S. Vijay Selvaraj, Shaul Burd, Ron Ophir, K.S. Bettina Kochanek, Michael S. Reid, Cai-Zhong Jiang and Amnon Lers

View affiliations

Abstract:
The current abscission model suggests the formation of a post-abscission trans-differentiation of a protective layer as the last step of the process. The present report expands the repertoire of genes activated in the tomato flower abscission zone (AZ), which are likely to be involved in defense responses. We identified four different defense-related genes, including: Cysteine-type endopeptidase, α-Dioxygenase 1 (α-DOX1), HopW-1-1-Interacting protein2 (WIN2), and Stomatal-derived factor-2 (SDF2), that are newly-associated with the late stage of the abscission process. The late expression of these genes, induced at 8-14 h after flower removal when pedicel abscission was already in progress, was AZ-specific, and was inhibited by treatments that prevented pedicel abscission, including 1-methylcyclopropene pretreatment or IAA application. This information supports the activation of different defense responses and strategies at the late abscission stages, which may enable efficient protection of the exposed tissue toward different environmental stresses.

Article Addendum to:
S Meir, S Philosoph-Hadas, S Sundaresan, KS Selvaraj, S Burd, R Ophir, B Kochanek, MS Reid, CZ Jiang, A Lers. Microarray analysis of the abscission-related transcriptome in the tomato flower abscission zone in response to auxin depletion. Plant Physiol 2010; 154: 1929-56
PMID: 20947671 DOI: 10.1104/pp.110.16069

Received: February 2, 2011; Accepted: February 2, 2011

Preview:



Advertisements