Seaweed extract to enhance marigold seed germination and seedling establishment

Tavares, Armando Reis; Santos, Patrick Luan Ferreira dos; Zabotto, Alessandro Reinaldo; Nascimento, Matheus Vinícios Leal do; Jordão, Half Weinberg Corrêa; Bôas, Roberto Lyra Villas; Broetto, Fernando

doi:10.1007/s42452-020-03603-3

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…We also found improved moisture content in the upper soil layers at four of our sites. Biostimulants enhance early root growth, leading to increased aeration and moisture content in soil, which further support microbial growth and activity (Angers & Caron 2018; Hartman & Tringe, 2019; Tavares et al, 2020). These findings suggest biostimulants have the potential to improve WHC through improved structure and water retention.…”

Section: Discussionmentioning

confidence: 99%

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Wadduwage,

Liu,

Egidi

et al. 2023

J of Sust Agri & Env

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IntroductionDespite their potential benefits, it is not well understood how the application of biostimulants influences soil biological properties and their microbial communities in field conditions. In this study, we aimed to evaluate the impacts of biostimulants on soil biological and physicochemical properties relevant to soil health.Materials and MethodsTo achieve this, we conducted a field study to investigate the effects of two types of commercially available biostimulants, Universal Natural Plant food (UNP) and Converte Seed Primer (CSP), on microbial activity, bacterial and fungal abundance, community structure and diversity, and soil chemical and physical properties across two depths (0–10 and 10–20 cm) from five sites under either wheat or pasture cultivation.ResultsOur findings suggest that application of UNP stimulated microbial activity by 40.1% in surface (0–10 cm) and 36.4% in deeper (10–20 cm) soil, but was dependant on site. Effects were generally greater in grasslands compared with arable soils. At sites where UNP stimulated microbial respiration, substrate‐induced respiration was also stimulated in surface soils and was associated with increased soil moisture content and higher total carbon and nitrogen. At the one site where UNP was combined with CSP, soil enzymes associated with carbon and nitrogen cycling were stimulated in UNP and UNP + CSP treatments. Total bacterial and fungal abundance and their alpha diversity did not respond to biostimulant treatment. However, microbial indicator communities were identified that responded positively to UNP and CSP addition across the two depths. Bacterial indicator species included Elsterales, Propionibacteriales, Solibacterales, Candatus, Reyranellales and Sphingomonadales, but differed between depths. For the fungal indicator species Filobasidiales (Basidiomycota) and Pleosporales (Ascomycota) were strong responders and common across both depths.ConclusionOverall, our results suggest some positive effects of biostimulants on soil biological and physicochemical properties. Further long‐term studies should be conducted to evaluate the effects of biostimulants on crop yield and farm resilience.

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Section: Discussionmentioning

confidence: 99%

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Wadduwage,

Liu,

Egidi

et al. 2023

J of Sust Agri & Env

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“…In the present study, irrespective of water condition, biostimulant associated treatments significantly enhanced seed germination compared to the untreated control. Biostimulants consist of diverse bioactive components such as cytokines, auxins, abscisic acid, gibberellins and betaine‐like compounds that can enhance seed germination and improve seedling establishment (Demir et al, 2006; Tavares et al, 2020). Moreover, biostimulants are reported to reverse seed dormancy due to germination stimulating gibberellins and enhance early seedling growth by supplying macro and micro‐nutrients (Demir et al, 2006; Tavares et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Biostimulants consist of diverse bioactive components such as cytokines, auxins, abscisic acid, gibberellins and betaine‐like compounds that can enhance seed germination and improve seedling establishment (Demir et al, 2006; Tavares et al, 2020). Moreover, biostimulants are reported to reverse seed dormancy due to germination stimulating gibberellins and enhance early seedling growth by supplying macro and micro‐nutrients (Demir et al, 2006; Tavares et al, 2020). In contrast, application of inorganic fertiliser reduced seed germination under both drought stress and well‐watered condition.…”

Section: Discussionmentioning

confidence: 99%

Impacts of biostimulants on crop yield and biological activity under drought conditions

Wadduwage,

Egidi,

Singh

et al. 2024

J of Sust Agri & Env

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IntroductionBiostimulants are proposed to have a role in sustainable food production and are being increasingly used strategies to limit the negative effects of drought stress on crop yield and soil health. However, how different biostimulants used alone, or in combination with conventional management approaches affect soil health and crop yield under drought in different soils is not well understood. Here we conducted a glasshouse experiment to investigate this.Materials and MethodsTwo soil types from fields maintained under intensive (IM) and extensive (EM) management practices were used with two commercial biostimulants [Universal Natural Plant food (UNP) and Converte Seed Primer (CSP)] on soil microbial populations and crop yield (lettuce) under well‐watered and drought stressed conditions. We examined the activity and biomass of soil microorganisms as well as seed germination and root and shoot biomass to examine the effect of application of biostimulants on parameters of soil health and crop yield.ResultsBiostimulants generally increased crop yield, basal soil respiration and microbial biomass, with effects stronger in EM soils than in IM soils, but effects on soil enzyme activities were variable. The combined use of biostimulant and inorganic fertiliser negated the benefits of the biostimulant on soil biological properties in some cases. Nevertheless, effects of biostimulants had a positive impact on crop yield with the combined use of soil‐applied and seed applied biostimulants have the greatest impact on plant biomass and also conferring some resistance in both soil microbial communities and plant growth to drought.ConclusionsWhile biomass and activity of the microbial community and plant growth responses to biostimulant additions are both soil and biostimulant dependent, their combined use has potential to aid both plants and maintain promote microbial activity under of drought, compared to conventional fertiliser treatments in extensively managed soils.

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“…Germination: 15 ml/l of alkaline seaweed extract of Ascophyllum nodosum Acadian Seaplants TM has found to increase the germination by two-fold in African marigold (Tavares et al, 2020). This may be is due to the presence of cytokinin, auxin, gibberellins, betaines and alginates in nodosum (MacKinnon, 2010) that supports germination (Santos, 2019).…”

Section: Plant Growth Regulatorsmentioning

confidence: 99%

“…Triacontanol (TRIA), CCC and NAA @ 20, 4000 and 10 ppm were found effective than 30, 5000 and 20 ppm respectively in increasing plant height in African marigold variety Calcutta Marigold. Seed treated with 15 ml/L of commercial seaweed extract Acadian Seaplants™ (70 ml) induce seedling height to be increased by 84% (Tavares et al, 2020).…”

Section: Plant Heightmentioning

confidence: 99%

Effect of Plant Growth Regulators in African Marigold: A Review

Regmi¹,

Acharya

2022

Nep. Hort.

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African marigold, being tall enough and producing large flowers suitable for preparing garlands, is the most cultivated cultivar of marigold in Nepal. Besides, pinching and other improved cultural techniques, a number of chemicals, hormones and phyto-hormones are being tested and found to impart a varying response in African marigold. This review has its importance for standardizing the type and concentration of plant growth regulators in African marigold. Online journals, scientific papers, proceedings, books, thesis and lecture notes are the key reference site for this review. Gibberellins or gibberellic acids (GA3), ethrel, paclobutrazol, salicylic acid, Indole 3 Acetic Acid, Naphthalene Acetic Acid (NAA), Chlormequat Chloride and sea weed extract are the most widely used and proven biochemical with pronounced effect on growth, development and differentiation in marigold. Among these, 300 ppm, 350 ppm and 450 ppm of GA3 results higher plant height, minimum days for flower initiation and higher basal diameter respectively. Similarly, 450 ppm for higher number of branches and leaves per plant and 400 ppm of GA3 or 600 ppm of CCC has been found to impart higher number and weight of flowers per plants. Besides, 1000 ppm of CCC has been found more effective to impart higher productivity (yield/ ha) in African marigold. Hence, plant growth regulators have been a valuable agent for optimizing yield and yield potential in African marigold.

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Seaweed extract to enhance marigold seed germination and seedling establishment

Cited by 6 publications

References 19 publications

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Effects of biostimulant application on soil biological and physicochemical properties: A field study

Impacts of biostimulants on crop yield and biological activity under drought conditions

Effect of Plant Growth Regulators in African Marigold: A Review

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