Effect of abscisic acid and ontogenic phases of the host alga on the infection process in the pathosystem Scenedesmus acutus - Phlyctidium scenedesmi

• Autorzy: Pouneva I D
• Języki publikacji: EN

Abstrakty

EN

The parasite contamination make difficult laboratory cultivation of green algae and decrease significantly the production of microalgal biomass during industrial cultivation. In the present study the influence of the endogenous abscisic acid content (determinate by gas chromatography) on the host-parasite relationship in different ontogenetic phases of the host Scenedesmus as well as resistance induction after treatment of synchronous algal culture with ABA were studied. Synchronization of algae was carried out by alteration of light and dark periods. The age groups under study were: autospores (at the beginning of the light period), growing cells, mature cells (belonging to in the end of the light period) and mature cells, starting to release autospore at the beginning of dark phases. The higher levels of endogenous ABA during the algal autospore formation as well as exogenous ABA supply of (10-5 M) inhibited the infection process in the pathosystem green microalga Scenedesmus acutus and unicellular fungal parasite Phlyctidium scenedesmi. The treatment with fluridone 10-7 M (an inhibitor ofABA biosynthesis) increased the host susceptibiltty during all ontogenetic phases. The susceptibiltty of S. acutus to the chytridial infection depended on the endogenous ABA level during different ontogenetic stages of the alga.

Słowa kluczowe

EN

infection process; plant physiology; abscisic acid; chytridial parasite; pathosystem; Phlyctidium scenedesmi; resistance; plant hormone; Scenedesmus acutus; biotic stress; green alga; reactive oxygen species; host-parasite relationship; host alga

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2006
• Tom: 28
• Numer: 5
• Opis fizyczny: p.395-400,fig.,ref.

Twórcy

autor

Pouneva I D

• Bulgarian Academy of Sciences, Sofia 1113, Bulgaria

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