Anatomical and histochemical characterization of in vitro haustorium from roots of Castilleja tenuiflora

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Abstract

In vitro induction of haustoria from Castilleja tenuiflora Benth. was achieved by applying 25 μM catechin, 25 μM vanillin, or 25 μM H2O2. Of the treatments tested, 25 μM vanillin was the strongest inducer of haustoria in C. tenuiflora roots in vitro (up to 3 haustoria per root). Haustorium development occurred laterally and was observable 14 d after inducer application. It was characterized by elongation of the epidermal cells and division of the inner cortical cells which also possessed abundant nuclei. Histochemical analysis using 3,3-diaminobenzidine (DAB) and diphenylboric acid 2-aminoethyl ester (DBPA) indicated that the formation of haustoria was associated with the accumulation of H2O2 and flavonoids.

Original languageEnglish
Pages (from-to)164-168
Number of pages5
JournalBiologia Plantarum
Volume58
Issue number1
DOIs
StatePublished - 1 Mar 2014

Keywords

  • catechin
  • flavonoids
  • hemiparasitism
  • hydrogen peroxide
  • vanillin

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