Comparative studies of compatible and incompatible pepper–Tobamovirus interactions and the evaluation of effects of 24-epibrassinolide

A. Janeczko, M. Dziurka, G. Gullner, M. Kocurek, M. Rys, D. Saja, A. Skoczowski, I. Tóbiás, A. Kornas, B. Barna

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2 Citations (Scopus)

Abstract

The aim of study was to gain a deeper knowledge about local and systemic changes in photosynthetic processes and sugar production of pepper infected by Obuda pepper virus (ObPV) and Pepper mild mottle virus (PMMoV). PSII efficiency, reflectance, and gas exchange were measured 48 and/or 72 h after inoculation (hpi). Sugar accumulation was checked 72 hpi and 20 d after inoculation (as a systemic response). Inoculation of leaves with ObPV led to appearance of hypersensitive necrotic lesions (incompatible interaction), while PMMoV caused no visible symptoms (compatible interaction). ObPV (but not PMMoV) lowered Fv/Fm (from 0.827 to 0.148 at 72 hpi). Net photosynthesis decreased in ObPV-infected leaves. In ObPV-inoculated leaves, the accumulation of glucose, fructose, and glucose-6-phosphate was accompanied with lowered sucrose, maltoheptose, nystose, and trehalose contents. PMMoV inoculation increased the contents of glucose, maltose, and raffinose in the inoculated leaves, while glucose-6-phosphate accummulated in upper leaves.

Original languageEnglish
Pages (from-to)763-775
Number of pages13
JournalPhotosynthetica
Volume56
Issue number3
DOIs
Publication statusPublished - Sep 1 2018

Keywords

  • CO assimilation
  • brassinosteroids
  • systemic virus response
  • water band index
  • xanthophyll cycle

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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