Phytohormone Signaling of the Resistance to Plum pox virus (PPV, Sharka Disease) Induced by Almond (Prunus dulcis (Miller) Webb) Grafting to Peach (P. persica L. Batsch)

Viruses
Azam Nikbakht DehkordiPedro Martínez-Gómez

Abstract

Plum pox virus (PPV, sharka) is a limiting factor for peach production, and no natural sources of resistance have been described. Recent studies, however, have demonstrated that grafting the almond cultivar "Garrigues" onto the "GF305" peach infected with Dideron-type (PPV-D) isolates progressively reduces disease symptoms and virus accumulation. Furthermore, grafting "Garrigues" onto "GF305" prior to PPV-D inoculation has been found to completely prevent virus infection, showing that resistance is constitutive and not induced by the virus. To unravel the phytohormone signaling of this mechanism, we analyzed the following phytohormones belonging to the principal hormone classes: the growth-related phytohormones cytokinin trans-zeatin (tZ) and the gibberellins GA₃ and GA₄; and the stress-related phytohormones ethylene acid precursor 1-aminocyclopropane-1-carboxylic acid (ACC), abscisic acid (ABA), salicylic acid (SA), and jasmonic acid (JA). PPV inoculation produced a significant increase in GA₃ and ABA in peach, and these imbalances were related to the presence of chlorosis symptoms. However, grafting "Garrigues" almond onto the PPV-inoculated "GF305" peach produced the opposite effect, reducing GA₃ and ABA contents in parallel...Continue Reading

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Citations

Aug 28, 2019·Molecular Plant-microbe Interactions : MPMI·Bernardo RodamilansJuan Antonio García
Sep 19, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Rahat SharifYuhong Li
Apr 4, 2021·International Journal of Molecular Sciences·Manuel RubioPedro Martínez-Gómez

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Datasets Mentioned

BETA
KJ849228.1

Methods Mentioned

BETA
electrophoresis
ELISA
transgenic

Software Mentioned

Xcalibur

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