Pesta granule trials with<i>Aspergillus alliaceus</i>for the biocontrol of<i>Orobanche</i>spp.

Aybeke, Mehmet; Şen, Burhan; Ökten, Suzan

doi:10.1080/09583157.2015.1018813

Cited by 9 publications

(9 citation statements)

References 14 publications

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“…A “multiple-pathogen strategy” in which two or more pathogens are combined has been proved successful for the control of broomrape causing a synergistic effect that can lead to 100% broomrape control ( Dor and Hershenhorn, 2003 ; Müller-Stöver et al, 2005 ). Refined formulations and encapsulations of fungal propagules increase efficacy in biocontrol by reducing desiccation or microbial competition ( Amsellem et al, 1999 ; Quimby et al, 1999 ; Kroschel et al, 2000 ; Müller-Stöver, 2001 ; Aybeke et al, 2015 ). Engineering of virulence-enhanced mycoherbicides is another approach of great interest.…”

Section: Control Strategies Targeting Underground Broomrape Stagesmentioning

confidence: 99%

Broomrape Weeds. Underground Mechanisms of Parasitism and Associated Strategies for their Control: A Review

2016

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Broomrapes are plant-parasitic weeds which constitute one of the most difficult-to-control of all biotic constraints that affect crops in Mediterranean, central and eastern Europe, and Asia. Due to their physical and metabolic overlap with the crop, their underground parasitism, their achlorophyllous nature, and hardly destructible seed bank, broomrape weeds are usually not controlled by management strategies designed for non-parasitic weeds. Instead, broomrapes are in current state of intensification and spread due to lack of broomrape-specific control programs, unconscious introduction to new areas and may be decline of herbicide use and global warming to a lesser degree. We reviewed relevant facts about the biology and physiology of broomrape weeds and the major feasible control strategies. The points of vulnerability of some underground events, key for their parasitism such as crop-induced germination or haustorial development are reviewed as inhibition targets of the broomrape-crop association. Among the reviewed strategies are those aimed (1) to reduce broomrape seed bank viability, such as fumigation, herbigation, solarization and use of broomrape-specific pathogens; (2) diversion strategies to reduce the broomrape ability to timely detect the host such as those based on promotion of suicidal germination, on introduction of allelochemical interference, or on down-regulating host exudation of germination-inducing factors; (3) strategies to inhibit the capacity of the broomrape seedling to penetrate the crop and connect with the vascular system, such as biotic or abiotic inhibition of broomrape radicle growth and crop resistance to broomrape penetration either natural, genetically engineered or elicited by biotic- or abiotic-resistance-inducing agents; and (4) strategies acting once broomrape seedling has bridged its vascular system with that of the host, aimed to impede or to endure the parasitic sink such as those based on the delivery of herbicides via haustoria, use of resistant or tolerant varieties and implementation of cultural practices improving crop competitiveness.

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Section: Control Strategies Targeting Underground Broomrape Stagesmentioning

confidence: 99%

Broomrape Weeds. Underground Mechanisms of Parasitism and Associated Strategies for their Control: A Review

2016

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“…f Small Orobanches, healthy (on the left), completely dark and dead (in the middle and right ones) with the accumulation of phenols after the fungal infection followed by preparation of pure cultures. This is because CYA20S was found to be the most efficient formulation for fungi in trials with different agars [14,19,20].…”

Section: Methodsmentioning

confidence: 99%

“…Plants (sunflower and Orabanche) were grown in pots and the method of Muller-Stover et al [25] was applied partially modified by Aybeke et al [19]. The pots (140 × 130 mm, no.…”

Section: Methodsmentioning

confidence: 99%

“…Though, in general, this mycotoxin has several harmful effects such as hepatotoxicity, teratogenicity and immunosuppression, while it was also carcinogenic in the kidney and the liver [18]. In studies carried out, the fungus was effective only on Orobanche due to its very dense starch storage and did not cause any toxic effect on sunflower [14,19,20]. Nevertheless, Ochratoxin A tests should be performed on both Orobanche and sunflower in the future.…”

Section: Introductionmentioning

confidence: 99%

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Aspergillus alliaceus infection fatally shifts Orobanche hormones and phenolic metabolism

Aybeke

2020

Braz J Microbiol

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In this study, the physio pathological effects of Aspergillus alliaceus (Aa, fungi, biocontrol agent) on Orobanche (parasitic plant) were investigated by hormone and phenolic substance tests. In experimental group, Orobanches were treated with the fungi, considering control group was fungus-free. Based on the hormonal tests, in the experimental group, salicylic acid (SA), jasmonic acid (JA), abscisic acid (ABA) and gibberellic acid (GA) levels significantly decreased, and only indole acetic acid (IAA) hormone levels were fairly higher than the control group. According to phenolic substance tests, it was found that only gallic acid, syringic acid and caffeic acid values significantly increased compared with control, and catechin and p-coumaric acid values were significantly lower. Consequently, it was determined that Aa pathogenesis (1) considerably reduces the effects of all defence hormones (JA, ABA, SA), (2) operates an inadequate defence based solely on the IAA hormone and several phenolic substances (gallic acid, syringic acid and caffeic acid), (3) and inevitably the fungi lead the Orobanche to a slow and continuous death. The results were evaluated in detail in the light of similar recent article and current literature in terms of biocontrol and pathology.

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“…The biocontrol efficacy of Aspergillus alliaceus against parasitic weeds (Orobanche spp.) incorporated in Pesta granules was improved by addition of potato broth or sorghum meal [149].…”

Section: "Pesta" Granulesmentioning

confidence: 99%

Production and Stabilization of Mycoherbicides

Berestetskiy¹,

Сокорнова²

2018

Biological Approaches for Controlling Weeds

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Despite the urgent need for alternatives to chemicals in plant protection, biological herbicides are not widely used as biofungicides and bioinsecticides. The review is devoted to connections between fungal biology, biochemistry, their ability to survive in extreme environment and development of effective mycoherbicides. Advanced studies on the production and stabilization of mycofungicides and mycoinsecticides were analyzed too in order to obtain ideas for the improvement of efficacy and technology of mycoherbicides in the future. The analysis of research data published within last 20 years showed following trends. First, more attention is paid for production both effective and stress tolerant propagules especially based on the submerged fungal mycelium and its modifications (blastospores, chlamydospores and microsclerotia). Second, the construction of bioreactors, in particular, for solid-state fermentation is continuously being improved that allows producing highly stress tolerant fungal aerial conidia. Third, based on studies of biochemical mechanisms of viability of fungi in extreme environment, the approaches of stabilization and storage of fungal propagules were developed. However, the positive reply to the question, if biopesticides including mycoherbicides, will become a serious alternative to agrochemicals, will be possible when they demonstrate stable efficacy in the field conditions and safety for both environment and end users.

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Pesta granule trials withAspergillus alliaceusfor the biocontrol ofOrobanchespp.

Cited by 9 publications

References 14 publications

Broomrape Weeds. Underground Mechanisms of Parasitism and Associated Strategies for their Control: A Review

Broomrape Weeds. Underground Mechanisms of Parasitism and Associated Strategies for their Control: A Review

Aspergillus alliaceus infection fatally shifts Orobanche hormones and phenolic metabolism

Production and Stabilization of Mycoherbicides

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