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Pregled bibliografske jedinice broj: 966408

Organ-specific differences in endogenous phytohormone and antioxidative responses in potato upon PSTVd infection


Milanović, Jasna; Oklestkova, Jana; Majdandžić, Anamari; Novák, Ondřej; Mihaljević, Snježana
Organ-specific differences in endogenous phytohormone and antioxidative responses in potato upon PSTVd infection // Journal of plant physiology (2018) (znanstveni, poslan)


Naslov
Organ-specific differences in endogenous phytohormone and antioxidative responses in potato upon PSTVd infection

Autori
Milanović, Jasna ; Oklestkova, Jana ; Majdandžić, Anamari ; Novák, Ondřej ; Mihaljević, Snježana

Vrsta, podvrsta
Radovi u časopisima, -, znanstveni

Izvornik
Journal of plant physiology (2018)

Status rada
Poslan

Ključne riječi
Ascorbate ; brassinosteroids ; IAA ; JA ; peroxidases ; PSTVd

Sažetak
Although structurally simple, viroids can trigger numerous changes in host plants and cause loss of yield in agronomically important crops. This study investigated changes in the endogenous status of phytohormones and antioxidant enzyme activity in Solanum tuberosum cv. Désirée in response to Potato spindle tuber viroid (PSTVd) infection. Phytohormone analysis showed that the content of endogenous jasmonic acid (JA) and its precursor cis-OPDA significantly increased in leaves, while the content of castasterone (CS) increased in both leaves and tubers of systemically infected plants compared to mock- inoculated control plants at 8 weeks post- inoculation. The indole-3-acetic acid content moderately increased only in tubers, while no differences in salicylic acid and abscisic acid content were observed between infected and control plants. Changes in endogenous phytohormone content were associated with upregulated expression of genes involved in the biosynthesis of JA and brassinosteroids, and the metabolism of auxins. Additionally, PSTVd infection provoked overproduction of hydrogen peroxide, which coincided with increased activity of guaiacol peroxidase in leaves and ascorbate peroxidase in potato tubers. The activity of catalase decreased in leaves, while superoxide dismutase activity remained steady regardless of the treatment and organ type. Total ascorbate and glutathione did not change significantly, although a shift towards oxidized forms was observed. Results suggest the existence of organ-specific differences in phytohormone and antioxidative responses in potato upon PSTVd infection. Possible effects of the observed changes on symptom development are discussed.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE