A Biostimulant Preparation of Brown Seaweed Ascophyllum nodosum Suppresses Powdery Mildew of Strawberry

Bajpai, Sruti; Shukla, Pushp Sheel; Asiedu, Samuel K.; Pruski, Kris; Prithiviraj, Balakrishnan

doi:10.5423/ppj.oa.03.2019.0066

Cited by 55 publications

(35 citation statements)

References 35 publications

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“…The application of seaweed Ascophyllum nodosum extract on detached strawberry leaves against spore germination of Podosphaera aphanis, the causal agent of powdery mildew, can be found in the literature [43]. To the best of our knowledge, no studies of cinnamon and clove extract antifungal activity have been previously performed on detached strawberry leaves.…”

Section: Discussionmentioning

confidence: 99%

“…Various alternative ways for the control of Botrytis cinerea and other fungal pathogens in greenhouse and field conditions have been investigated [3,[38][39][40]. The effectiveness of microbial biocontrol agents and seaweed extract was previously studied on strawberry leaves [41][42][43]. However, in reviewing the available literature, it was observed that there is a lack of studies on the antifungal activity of plant extracts against B. cinerea on detached strawberry leaves.…”

Section: Introductionmentioning

confidence: 99%

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The Extracts of Cinnamon and Clove as Potential Biofungicides against Strawberry Grey Mould

Šernaitė

Rasiukevičiūtė

Valiuškaitė

2020

Plants

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Biofungicides from plants are a possibility for the biocontrol of fungal diseases, as chemical products may be harmful to the environment and humans. Strawberry is one of the many plants infected by grey mould (Botrytis cinerea), and innovative methods of biocontrol against B. cinerea are under investigation. Clove (Syzygium aromaticum L.) and cinnamon (Cinnamomum cassia L.) accumulate natural compounds, such as eugenol and cinnamaldehyde, which provide antimicrobial and antifungal properties; thus, extracts of these plants could be possibly used as biofungicides. During this study, the inhibition of B. cinerea by clove and cinnamon extracts was evaluated in vitro on Petri plates and detached strawberry leaves; additionally, the chemical composition of volatiles was identified. Clove extract consisted of 52.88% eugenol, and cinnamon consisted of 74.67% cinnamaldehyde. The efficacy of the extracts on detached strawberry leaves showed that 12 mL L−1 concentration of clove extract was effective in suppressing the grey mould infection. Clove and cinnamon extracts showed an equal ability to inhibit B. cinerea on Petri plates. However, the results of the detached strawberry leaves assay showed that clove extract was more effective as a biocontrol product. Overall, clove extract expressed a high potential for application in biofungicides formulations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Extracts of Cinnamon and Clove as Potential Biofungicides against Strawberry Grey Mould

Šernaitė

Rasiukevičiūtė

Valiuškaitė

2020

Plants

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“…Aerial applications of extracts from Ulva lactuca were effective against the late blight incited by Phytophthora infestans ( Ahmed et al, 2016 ). A biostimulant preparation of brown seaweeds significantly reduced powdery mildew on strawberry plants ( Bajpai et al, 2019 ). Conversely, the effectiveness of natural products based on plant derivatives, such as pomegranate peel extracts, has been tested to control both preharvest and postharvest plant diseases, and the use of plant extracts as inducers of resistance to protect plants from disease is very promising ( Pangallo et al, 2017a , b ; Belgacem et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…Although several studies investigated the potentiality of extracts from plants and algae in the pre-harvest plant protection ( Jayaraj et al, 2008 ; Ertani et al, 2013 ; Ahmed et al, 2016 ; Esserti et al, 2017 ; Ann Suji et al, 2019 ; Bajpai et al, 2019 ), there is a relatively little attention to their potential effectiveness in the managing of postharvest diseases.…”

Section: Introductionmentioning

confidence: 99%

Natural Biostimulants Elicit Plant Immune System in an Integrated Management Strategy of the Postharvest Green Mold of Orange Fruits Incited by Penicillium digitatum

Spada

Aloi

Coniglione³

et al. 2021

Front. Plant Sci.

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This study was aimed at testing the integrated use of a natural biostimulant based on seaweed (Ascophyllum nodosum) and plant (alfalfa and sugarcane) extracts and reduced dosages of the conventional synthetic fungicide Imazalil (IMZ) to manage postharvest rots of orange fruits. The following aspects were investigated: (i) the effectiveness of postharvest treatment with natural biostimulant alone or in mixture with IMZ at a reduced dose against green mold caused by Penicillium digitatum; (ii) the differential expression of defense genes in orange fruits treated with the natural biostimulant both alone and in combination with a reduced dose of IMZ; (iii) the persistence of the inhibitory activity of both biostimulant and the mixture biostimulant/IMZ against green mold; and (iv) the residue level of fungicide in citrus peel when applied alone or in combination with the biostimulant. Treatments with the chemical plant resistance-inducer potassium phosphite, alone or with a reduced dose of IMZ, were included for comparison. The mixture of natural biostimulant and IMZ at a low dose consistently reduced the incidence and severity of fruit green mold and induced a significant increase of the expression level of β-1,3-glucanase-, peroxidase (PEROX)-, and phenylalanine ammonia-lyase (PAL)-encoding genes in fruit peel, suggesting that the natural biostimulant elicits a long-lasting resistance of citrus fruits to infections by P. digitatum. Interestingly, the residual concentration of IMZ in fruits treated with the biostimulant/fungicide mixture was significantly lower than that of IMZ in fruits treated only with the fungicide at the same dose and by far below the threshold values set by the European Union. This study laid the foundations for (i) conceiving a practical and more eco-friendly alternative to the conventional postharvest management of green mold of citrus fruits, based almost exclusively on the use of synthetic fungicide IMZ, alone or mixed with potassium phosphite and (ii) providing a better insight into the mechanisms of disease resistance induction by biostimulants.

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“…A foliar spray of 0.2% ANE improved resistance against Podosphaera aphanis , which is the causative agent of powdery mildew in strawberries by enhancing the biosynthesis of secondary metabolites and defense-related enzymes [ 131 ]. Similarly, a foliar spray of 0.2% of Stimplex ® controlled the progression of fungal pathogens, i.e., Alternaria radicina and B. cinerea in carrot by inducing the activity of several defense-related enzymes, such as PO, PPO, PAL, chitinase and β-1,3-glucanase [ 133 ].…”

Section: Seaweeds: Sources Of Extracts Used As Biostimulantsmentioning

confidence: 99%

Seaweed-Based Compounds and Products for Sustainable Protection against Plant Pathogens

et al. 2021

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Sustainable agricultural practices increasingly demand novel, environmentally friendly compounds which induce plant immunity against pathogens. Stimulating plant immunity using seaweed extracts is a highly viable strategy, as these formulations contain many bio-elicitors (phyco-elicitors) which can significantly boost natural plant immunity. Certain bioactive elicitors present in a multitude of extracts of seaweeds (both commercially available and bench-scale laboratory formulations) activate pathogen-associated molecular patterns (PAMPs) due to their structural similarity (i.e., analogous structure) with pathogen-derived molecules. This is achieved via the priming and/or elicitation of the defense responses of the induced systemic resistance (ISR) and systemic acquired resistance (SAR) pathways. Knowledge accumulated over the past few decades is reviewed here, aiming to explain why certain seaweed-derived bioactives have such tremendous potential to elicit plant defense responses with considerable economic significance, particularly with increasing biotic stress impacts due to climate change and the concomitant move to sustainable agriculture and away from synthetic chemistry and environmental damage. Various extracts of seaweeds display remarkably different modes of action(s) which can manipulate the plant defense responses when applied. This review focuses on both the similarities and differences amongst the modes of actions of several different seaweed extracts, as well as their individual components. Novel biotechnological approaches for the development of new commercial products for crop protection, in a sustainable manner, are also suggested.

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A Biostimulant Preparation of Brown Seaweed Ascophyllum nodosum Suppresses Powdery Mildew of Strawberry

Cited by 55 publications

References 35 publications

The Extracts of Cinnamon and Clove as Potential Biofungicides against Strawberry Grey Mould

The Extracts of Cinnamon and Clove as Potential Biofungicides against Strawberry Grey Mould

Natural Biostimulants Elicit Plant Immune System in an Integrated Management Strategy of the Postharvest Green Mold of Orange Fruits Incited by Penicillium digitatum

Seaweed-Based Compounds and Products for Sustainable Protection against Plant Pathogens

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