Early leaf responses of cell physiological and sensor‐based signatures reflect susceptibility of wheat seedlings to infection by leaf rust

Spanic, Valentina; Vukovic, Ana; Cseplo, Monika; Vukovic, Rosemary; Buchvaldt Amby, Daniel; Cairo Westergaard, Jesper; Puskas, Katalin; Roitsch, Thomas

doi:10.1111/ppl.13990

Cited by 1 publication

(1 citation statement)

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“…Following fungus detection by different proteins and cell wall components, several defense mechanisms are induced, including activation of non-enzymatic and enzymatic antioxidants [16,44]. The determination of the oxidative status and antioxidative response of wheat spikes following Fusarium inoculations in the present study was conducted by measuring the content of the GSH and GSSG, as well as the activities of the enzymes of the AsA-GSH pathway (APX, MDHAR, DHAR, and GR).…”

Section: Asa-gsh Metabolism Response To Fhb Stressmentioning

confidence: 99%

Fusarium Head Blight Infection Induced Responses of Six Winter Wheat Varieties in Ascorbate–Glutathione Pathway, Photosynthetic Efficiency and Stress Hormones

Sunic,

Brkljacic,

Vukovic

et al. 2023

Plants

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Fusarium head blight (FHB) is one of the most studied fungal diseases of wheat, causing massive grain yield and quality losses. This study aimed to extend previous studies on the physiological and biochemical responses of winter wheat to FHB stress in a controlled environment by focusing on the ascorbate-glutathione pathway (AsA-GSH), photosynthetic efficiency, and stress hormone levels, thus providing insight into the possible interactions of different defense mechanisms during infection. The activity of AsA-GSH metabolism was increased in FHB resistant varieties, maintaining the redox state of spikes, and consequently preserving functional photosystem II. Furthermore, carotenoids (Car) were shown to be the major pigments in the photosystem assembly, as they decreased in FHB-stressed spikes of resistant and moderately resistant varieties, compared to controls. Car are also the substrate for the synthesis of abscisic acid (ABA), which acts as a fungal effector and its elevated content leads to increased FHB susceptibility in inoculated spikes. The results of this study contributed to the knowledge of FHB resistance mechanisms and can be used to improve the breeding of FHB resistant varieties, which is considered to be the most effective control measure.

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Section: Asa-gsh Metabolism Response To Fhb Stressmentioning

confidence: 99%