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P. Agarwal, R. Arora, S. Ray, A. K. Singh, V. P. Singh, H. Takatsuji, S. Kapoor and A. K. Tyagi, “Genomewide Identification of C2H2 Zinc-Finger Gene Family in Rice and Their Phylogeny and Expression Analysis,” Plant Molecular Biology, Vol. 65, No. 4, 2007, pp. 467-485. doi:10.1007/s11103-007-9199-y

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• TITLE: A Flower Specific Calcineurin B-Like Molecule (CBL)-Interacting Protein Kinase (CIPK) Homolog in Tomato Cultivar Micro-Tom (Solanum lycopersicum L.)

  AUTHORS: Takashi Yuasa, Yushi Ishibashi, Mari Iwaya-Inoue

  KEYWORDS: Calcium; CBL; CIPK; Flower; SnRK; Tomato

  JOURNAL NAME: American Journal of Plant Sciences, Vol.3 No.6, June 21, 2012

  ABSTRACT: Floral and reproductive organs of higher plants are relatively sensitive to biotic and abiotic stresses compared with the vegetative organs. Calcineurin B-like molecule (CBL) interacting protein kinase (CIPK) has appeared to be involved in acquired tolerance and acclimation under environmental stresses such as salinity, drought and chilling. Semi-quantitative RT-PCR using the vegetative and reproductive organs of tomato Micro-Tom (Solanum lycopersicum L.) at the various developmental stages indicated that SlCIPK2 was expressed specifically in the floral organ. An anti-CIPK specific antibody recognized the recombinant SlCIPK2 specifically and cross-reacted to a CIPK-related polypeptide at a significant level in flower, particularly in stamen. The flower specific CIPK was tightly associated with the microsomes. In vitro pull-down assay of the recombinant SlCIPK2 showed that SlCIPK2 interacts with SlCBLs and stress-responsive transcription factors, SlERF7, SlCBF1 and SlAREB1. The present data suggested that the flower-specific CIPK, SlCIPK2, was involved in calcium signaling in tomato via CBLs and stress tolerance possibly mediated by the stress-responsive transcription factors in stamen.