Related Experiment Video
Updated: May 14, 2026
11:48
A Contrast of Three Inoculation Techniques used to Determine the Race of Unknown Fusarium oxysporum f.sp. niveum Isolates
Published on: October 28, 2021
Differentiating Resistance Levels and Biochemical Responses of Soybean Cultivars Infected by Diverse Diaporthe
Behnoush Hosseini1, Kristina Petrović2,3, Jovana Šućur Elez4
1Department of Phytopathology, Institute of Phytomedicine, Faculty of Agricultural Sciences, University of Hohenheim, Otto-Sander-Str. 5, 70599 Stuttgart, Germany.
Plants (Basel, Switzerland)
|May 13, 2026
Summary
Identifying soybean resistance to Diaporthe pathogens is crucial. The Magnolia cultivar showed the highest resistance to four Diaporthe species, though biochemical markers for this resistance were inconclusive.
Area of Science:
- Plant Pathology
- Agronomy
- Biochemistry
Background:
- Soybean (Glycine max) is significantly impacted by Diaporthe species, a group of destructive pathogens.
- Current soybean resistance breeding primarily targets only two Diaporthe species, leaving a gap in managing other prevalent species.
- Identifying cultivars with broader resistance is vital for effective breeding programs and farmer guidance.
Purpose of the Study:
- To differentiate soybean resistance levels against four different Diaporthe species.
- To evaluate biochemical markers associated with plant defense responses.
- To identify soybean cultivars with enhanced resistance to Diaporthe pathogens.
Main Methods:
- Greenhouse experiments utilizing Stem Cut and Stem Wound inoculation methods for Diaporthe species.
- Visual assessment of symptom severity at five days post-inoculation (dpi).
- Measurement of biochemical parameters including lipid peroxidation (LP), superoxide dismutase (SOD) activity, total phenolics, and total flavonoids.
Main Results:
- Diaporthe caulivora demonstrated the highest aggressiveness, followed by D. longicolla, among the tested species.
- The soybean cultivar Magnolia exhibited the highest level of resistance, with no significant differences noted among other evaluated cultivars.
- While biochemical responses were detected, specific markers correlating with Magnolia's elevated resistance could not be definitively identified.
Conclusions:
- Soybean cultivar Magnolia possesses significant resistance against multiple Diaporthe species.
- Further research is needed to elucidate the specific biochemical mechanisms underlying Diaporthe resistance in soybean.
- Broadening resistance breeding efforts beyond the two currently targeted Diaporthe species is recommended for improved soybean crop management.
