Effect of Seaweed Extracts on Hyphal Growth of Vesicular-Arbuscular Mycorrhizal Fungi and their Infectivity on Trifoliate Orange Roots.

Kuwada, Kousaku; Ishii, Takaaki; Matsushita, Itaru; Matsumoto, Isao; Kadoya, Kazuomi

doi:10.2503/jjshs.68.321

Cited by 19 publications

(20 citation statements)

References 12 publications

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“…Low AMF colonization rate was observed by [9] when passion fruit plants were treated with seaweed Gracilaria verrucosa extract, while this extract stimulated root colonization in papaya. Seaweed active compounds can stimulate AMF hyphae growth in vitro [8] and enhance plant root colonization when applied into soil [8] [39], but it was shown that some substances present in seaweed can also inhibit AMF hyphae growth [40]. Kahydrin is a derivate of the vitamin K normally present in seaweed extracts; its exogenous application induced the acidification of rhizosphere [41] which can affect root colonization rate by AMF [42] [43].…”

Section: Discussionmentioning

confidence: 99%

The Influence of Bioproducts on Mycorrhizal Occurrence and Diversity in the Rhizosphere of Strawberry Plants under Controlled Conditions

Sas-Paszt¹,

Malusà²,

Sumorok³

et al. 2015

AiM

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The new products obtained from natural resources are an alternative to methods based on traditional mineral fertilizers, which are destructive for soil mycorrhizal communities. Our experiment was carried out to evaluate the effect of organic fertilizers and amendments of very diverse composition on mycorrhizal abundance and diversity, as well as on root growth, in strawberry plants cv. "Honeoye". The plants were grown in rhizoboxes filled with a podsolic soil. The plants were treated with granulated bovine manure, vermicompost extract, humates extract, plant extract, extract from seaweed species reinforced with humic and fulvic acids, a consortium of beneficial soil organisms, a stillage from yeast production and a solution of titanium. Plants treated with products and the microorganisms consortium also received half dose of manure. A standard mineral fertilization (NPK) and an unfertilized control were also included. The bioproducts based on humus-like substances and the yeast stillage had the greatest positive influence on the colonization of roots by arbuscular mycorrhizal fungi (AMF). The different treatments affected the diversity of AMF species present in the rhizospheric soil. All organic products, even though providing a significantly low amount of nutrients, enhanced root growth characteristics in comparison to the mineral fertilization.

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Section: Discussionmentioning

confidence: 99%

The Influence of Bioproducts on Mycorrhizal Occurrence and Diversity in the Rhizosphere of Strawberry Plants under Controlled Conditions

Sas-Paszt¹,

Malusà²,

Sumorok³

et al. 2015

AiM

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“…The filtrate was fractionated with flash chromatography equipped with an octa decyl silane (ODS; Chromatorex ODS DM1020T purchased from Fuji Silysia Chemical Ltd.) column (45 × 400 mm). One hundred mL of the filtrate was applied to the column and 700 mL of 0% (water), 10% (v/v), 25% (v/v), 50% (v/v) and 100% MeOH solutions were eluted successively (Kuwada et al, 1999). The column was rinsed with MeOH and equilibrated by water for further separation.…”

Section: Isolation Of a Stimulant For Am Fungus Hyphal Growthmentioning

confidence: 99%

“…The methanol (MeOH) extracts of two species of brown algae [Laminaria japonica Areschoug and Undaria pinnatifida (Harvey) Suringar] had no effect on hyphal growth of AM fungi. However, when MeOH extracts of these algae were fractionated with flash chromatography using step gradient solutions of MeOH (0, 10, 25, 50 and 100%), it was found that 25% MeOH eluates of these algae greatly stimulated in vitro AM hyphal growth and increased root colonization by AM fungus on trifoliate orange seedlings (Kuwada et al, 1999). When liquid fertilizer containing the 25% MeOH eluate of tangle (L. japonica) stock ground extract was applied by an overhead sprinkler system in a Miyauchi-iyokan (Citrus iyo Tanaka) orchard, root colonization by indigenous AM fungi was promoted by 27% and numbers of indigenous AM spores in the soil were increased by 21% compared to the control (Kuwada et al, 2000).…”

Section: Introductionmentioning

confidence: 98%

Isolation and structural elucidation of a growth stimulant for arbuscular mycorrhizal fungus from Laminaria japonica Areschoug

Kuwada¹,

Kuramoto

Utamura³

et al. 2006

J Appl Phycol

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Arbuscular Mycorrhizal (AM) fungi enhance terrestrial plant growth by forming a symbiotic relationship with the roots of its host plant. A growth stimulant for AM fungi was isolated from a brown alga Laminaria japonica Areschoug. The active substance for in vitro AM hyphal growth was isolated from 75% methanol extracts of L. japonica using a succession of chromatographic procedures, including flash chromatography equipped with an octa decyl silane (ODS) column, gel filtration chromatography and HPLC using an ODS column. Spores of Gigaspora margarita Becker & Hall, an AM fungus, were exposed to the compound in vitro, and hyphal growth of G. margarita was measured after two weeks of incubation. At 40 mg L −1 , the compound significantly stimulated the in vitro hyphal growth of G. margarita, compared to the K. Kuwada ( ) · M. Utamura control. This compound was elucidated as 5 -deoxy-5 -methylamino-adenosine by EIMS and NMR spectrum.

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“…Indirect stimulation of root growth may also occur via enhancement of associated soil microorganisms by seaweed extracts. Root colonization and in vitro hyphal growth of AMF were improved in the presence of extracts of brown algae (Kuwada et al 1999). (Alam et al 2013) showed that seaweed extract increased microbial diversity and activity in the rhizosphere of strawberry, while (Khan et al 2012; reported that seaweed extract stimulated alfalfa growth and root nodulation by improving the attachment of Sinorhizobium meliloti to root hairs.…”

Section: Specific Effects Of Seaweed Extracts On Plantsmentioning

confidence: 99%

Agricultural uses of plant biostimulants

2014

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Background Plant biostimulants are diverse substances and microorganisms used to enhance plant growth. The global market for biostimulants is projected to increase 12 % per year and reach over $2,200 million by 2018. Despite the growing use of biostimulants in agriculture, many in the scientific community consider biostimulants to be lacking peer-reviewed scientific evaluation. Scope This article describes the emerging definitions of biostimulants and reviews the literature on five categories of biostimulants: i. microbial inoculants, ii. humic acids, iii. fulvic acids, iv. protein hydrolysates and amino acids, and v. seaweed extracts.Conclusions The large number of publications cited for each category of biostimulants demonstrates that there is growing scientific evidence supporting the use of biostimulants as agricultural inputs on diverse plant species. The cited literature also reveals some commonalities in plant responses to different biostimulants, such as increased root growth, enhanced nutrient uptake, and stress tolerance.

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Effect of Seaweed Extracts on Hyphal Growth of Vesicular-Arbuscular Mycorrhizal Fungi and their Infectivity on Trifoliate Orange Roots.

Cited by 19 publications

References 12 publications

The Influence of Bioproducts on Mycorrhizal Occurrence and Diversity in the Rhizosphere of Strawberry Plants under Controlled Conditions

The Influence of Bioproducts on Mycorrhizal Occurrence and Diversity in the Rhizosphere of Strawberry Plants under Controlled Conditions

Isolation and structural elucidation of a growth stimulant for arbuscular mycorrhizal fungus from Laminaria japonica Areschoug

Agricultural uses of plant biostimulants

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