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Glomus iranicum var. tenuihypharum var. nov. strain and use thereof as biostimulant

a technology of tenuihypharum and glomus iranicum, which is applied in the field of glomus iranicum var. tenuihypharum var. nov. strain, can solve the problems that the mycorrhiza-forming fungi described in the state of the art do not provide a consistently positive effect on crop yield

Inactive Publication Date: 2017-07-06
SYMBORG SL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a new strain of the fungus Glomus iranicum, designated as BCCM deposit number 54871, which was isolated from a saline soil in Murcia, Spain. The strain has been deposited at the international depositary authority Belccm. The strain has been identified by the depositor as a new strain based on its unique genetic sequence. The strain has small, hyaline to very light ocher spores that are similar in size and color to other strains of Glomus iranicum. The strain has been found to have a wide host range and a unique distribution pattern. The patent text also describes the soil properties and the phylogeny of the strain. The technical effect of the invention is the new strain of Glomus iranicum, which has been deposited at the international depositary authority.

Problems solved by technology

Said limit is mainly due to the strain used and the method for obtaining the mycorrhizal compositions.
Mycorrhiza-forming fungi described in the state of the art do not provide a consistently positive impact on crop yield due to a lack of efficiency in mycorrhizal colonization under all soil conditions and fertility levels.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Genetic Identification of the Strain of the Invention

DNA Extraction

[0050]Isolated hyphae and spores were transferred to 1.5 ml Eppendorf tubes with 0.2 g of glass beads (2 mm diameter) and 100 μL of CTAB buffer (2% CTAB=Cetyl trimethyl ammonium bromide, 1.4 M NaCl, 0.1 M Tris-HCl pH 7.5, 0.2 M Na-EDTA).

[0051]This mixture was homogenized using a ball mill type Retsch MM301 at full speed for 30 seconds. Another 400 μL of CTAB buffer were added and the mixture was incubated at 65° C. for one hour. Subsequently 400 μL of Cholroformo-isoamyl alcohol (24:1) were added and it is mixed by inverting the reaction tubes and then it was centrifuged for 5 min at 10,000×g, and the upper layer was recovered in a clean Eppendorf tube. This step was repeated twice. 200 μL of 5 M ammonium acetate were added to this suspension, the mixture was incubated at 4° C. for 30 minutes, followed by 20 minutes of spinning at 4° C. and 13,000 rpm. The DNA was precipitated with 700 μL of isopropanol at −20° C. ov...

example 2

[0056]Effectiveness of the Composition of the Invention on Lettuce Crop

[0057]The plant species studied was “Roman” type Lactuca sativa L, annual plant with a growing cycle of 90 days. The seeding was performed by transplant in the January-March period, in pots of 75 cm×15 cm×15 cm in size, placing three seedlings / pot. The data of the chemical analysis of the soil used in the test are shown below (Table 2).

TABLE 2Main features of the soil used in the test.ElementsContentsOrganic Matter (%)1.3Total Nitrogen (%)0.2C:N Ratio6.4Total Carbonates (%)10.2Active Limestone (%)2.6Assimilable phosphates231.2(ppm)Chlorides (meq / 100 g)0.09Sulfates (meq / 100 g)0.3Assimilable iron (ppm)25.2Assimilable copper (ppm)2.3Assimilable Manganese32.0Assimilable Zinc (ppm)1.2

[0058]Three species of mycorrhiza-forming fungi we used in this study: Glomus mosseae (Nicholson & Gerdeman) Gerdeman & Trappe, Glomus intraradices (NC Schenck & GS Sm. 1982) and Glomus iranicum var. tenuihypharum var. nov.

[0059]The metho...

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PUM

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Abstract

Glomus iranicum var. tenuihypharum var. nov. strain deposited under BCCM deposit number 54871, comprising the sequence identified by SEQ ID NO: 1; composition comprising said strain and 2:1 smectite clays and use thereof as bio-stimulant. The invention also discloses a composition comprising said strain, fungicides, bio-fungicides, insecticides, bio-insecticides, nematicides and bio-nematicides.

Description

FIELD OF THE INVENTION[0001]The invention relates to the agronomic field. Specifically, the present invention relates to a composition comprising a Glomus iranicum var. tenuihypharum var. nov. strain and other components, which is used as bio-stimulant.BACKGROUND OF THE INVENTION[0002]Mycorrhizal compositions made so far have a natural limit of mycorrhizal propagules. Said limit is mainly due to the strain used and the method for obtaining the mycorrhizal compositions. Not all species of mycorrhizal fungi found in the literature have a constant and positive mycorrhizal activity in crops.[0003]Mycorrhiza-forming fungi described in the state of the art do not provide a consistently positive impact on crop yield due to a lack of efficiency in mycorrhizal colonization under all soil conditions and fertility levels. The high level of mycorrhizal colonization and growth of mycelium demonstrated by the strain described in the present application under a wide range of soil saline conditions...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A01N63/04C12R1/645C12N1/14A01N63/30
CPCA01N63/04C12R1/645C12N1/14A01H17/00A01N63/30C12R2001/645C12N1/145A01N63/28A01N25/00A01N25/08A01N25/12A01N63/38A01N63/22A01N65/00
Inventor JUAREZ, JESUSFELIX, FERNAN-DEZ
Owner SYMBORG SL
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