Effect of mechanical damage on vigor, physiological parameters, and susceptibility of oat Avena sativa to Fusarium culmorum infectionReport as inadecuate




Effect of mechanical damage on vigor, physiological parameters, and susceptibility of oat Avena sativa to Fusarium culmorum infection - Download this document for free, or read online. Document in PDF available to download.

Phytoparasitica

, Volume 40, Issue 1, pp 29–36

First Online: 29 September 2011Received: 28 July 2011Accepted: 11 September 2011

Abstract

Vigor and selected physiological parameters content of phenolic compounds, soluble sugars, chlorophyll a and b, and carotenoids of eight naked and two husked oat cultivars harvested at 15% moisture content were determined. Oat seeds were threshed using two rotational speeds of the threshing drum: 1.6 m s LS and 2.4 m s HS. They were then inoculated with a medium pathogenicity strain of Fusarium culmorum, strain IPO 348–01. In naked cultivars, the use of HS resulted in more severe mechanical damage; in consequence, seedling vigor decreased by 16%. In naked cultivars chlorophyll a and b and carotenoids content were significantly reduced—by more than 64%—when the HS was used. The inoculation caused over a 100% increase of carbohydrates in roots at LS but only a slight increase at HS. Phenolic compound content was twice as high in roots than in leaves after inoculation for both LS and HS. Area of microdamage and reduction of root fresh weight f.wt. are significantly correlated with biochemical parameters. Smaller microdamage area and root f.wt. reduction are connected with higher physiological parameters, which confirms lower seedling susceptibility to pathogen infection.

KeywordsFusarium seedling blight Husked oat Naked oat Resistance  Download fulltext PDF



Author: Tomasz Warzecha - Andrzej Zieliński - Edyta Skrzypek - Tomasz Wójtowicz - Maria Moś

Source: https://link.springer.com/article/10.1007/s12600-011-0196-y







Related documents