Differential Induction of Phenylalanine Ammonia Lyase and Phenolics in Peppers (Capsicum annuum) in Response to Inoculation with Phytophthora capsici

KOÇ E., Ustun A. S.

INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY, cilt.13, sa.6, ss.881-887, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 6
  • Basım Tarihi: 2011
  • Dergi Adı: INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.881-887
  • Anahtar Kelimeler: PAL, Pepper, Phenylalanine ammonia lyase, Phenolics, Phytophthora capsici, DATE PALM, RESISTANCE, ROOTS, BLIGHT, LIGNIFICATION, LIGNIN, WHEAT, ACID, L.
  • Ankara Üniversitesi Adresli: Evet

Özet

The biochemical response of pepper to P. capsici-22 infection, was investigated by comparing P. capsici -inoculated and non-inoculated roots, stems and leaves of resistant (CM-334) and susceptible (KM-Hot) cultivars. Two pepper cultivars with different resistance to P. capsici-22 were inoculated with 10(4) zoospore/mL to analyze the time course of phenylalanine ammonia-lyase (PAL) activity and total phenolic. Activity of PAL increased in inoculated roots, stems and leaves of two genotypes. PAL activity increased as early as 2 days after inoculation. The highest PAL content in control and infected leaves and stems was recorded in CM-334 cultivar. Induction of phenolic synthesis was found in the inoculated stems and leaves of two genotypes, with the highest rate of phenolic content observed in stems and leaves of the resistant genotypes, compared with controls. These results suggest that induction of PAL and accumulation of phenolics might have contributed to restrict the invasion of P. capsici. (C) 2011 Friends Science Publishers