חיפוש מתקדם
IOBC/WPRS Bulletin

Gutierrez, Hellen Angelica Quiñonez

Induced disease resistance in plants is a physiological state of enhanced defensive capacity elicited by specific stimuli, whereby the plant’s innate defences are potentiated against subsequent challenges. This enhanced state of resistance is effective against a broad range of pathogens and parasites, including fungi, bacteria, viruses, and nematodes. The two most clearly defined forms of induced resistance are Systemic Acquired Resistance (SAR) and Induced Systemic Resistance (ISR). The changing environmental conditions may lead to changes in the activity and survival of organisms. Powdery mildew (Podosphaera aphanis) is one of the major fungal diseases of strawberry world-wide and is expected to increase its distribution under changing climatic conditions. In the present research we study induced resistance in strawberry plants under the changing environmental conditions that are expected due to global warming. Inducers that are tested in the present study include Trichoderma harzianum T39, acibenzolar-S-methyl (Bion), a new SCNB2 inducer and isolates of a bacterium and a yeast. These agents not only effectively suppressed powdery mildew on leaves when sprayed on the canopy, but also induced systemic resistance when applied to the root zone while disease was evaluated on the leaves. Similarly lower leaf application resulted in upper leaf disease suppression. Plant growth was enhanced in the presence of the biological inducers in the root zone, especially under limited irrigation conditions. The effect of different temperatures and water stress conditions on induced resistance is further studied. Furthermore, the effect of the climate parameters on the expression of induced resistance genes will be studied.

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הספר "אוצר וולקני"
אודות
תנאי שימוש
Effect of climate parameters on induced resistance in strawberry powdery mildew
78

Gutierrez, Hellen Angelica Quiñonez

Induced disease resistance in plants is a physiological state of enhanced defensive capacity elicited by specific stimuli, whereby the plant’s innate defences are potentiated against subsequent challenges. This enhanced state of resistance is effective against a broad range of pathogens and parasites, including fungi, bacteria, viruses, and nematodes. The two most clearly defined forms of induced resistance are Systemic Acquired Resistance (SAR) and Induced Systemic Resistance (ISR). The changing environmental conditions may lead to changes in the activity and survival of organisms. Powdery mildew (Podosphaera aphanis) is one of the major fungal diseases of strawberry world-wide and is expected to increase its distribution under changing climatic conditions. In the present research we study induced resistance in strawberry plants under the changing environmental conditions that are expected due to global warming. Inducers that are tested in the present study include Trichoderma harzianum T39, acibenzolar-S-methyl (Bion), a new SCNB2 inducer and isolates of a bacterium and a yeast. These agents not only effectively suppressed powdery mildew on leaves when sprayed on the canopy, but also induced systemic resistance when applied to the root zone while disease was evaluated on the leaves. Similarly lower leaf application resulted in upper leaf disease suppression. Plant growth was enhanced in the presence of the biological inducers in the root zone, especially under limited irrigation conditions. The effect of different temperatures and water stress conditions on induced resistance is further studied. Furthermore, the effect of the climate parameters on the expression of induced resistance genes will be studied.

Scientific Publication
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