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Champignons comestibles et Biofertilisation

Etude des caractéristiques nutritionnelles des champignons comestibles analysés précédemment en tant qu’agents biofertilisants

Developing the plant of the future Agroecosystem Genomics intrant Growth Nitrogen Organic agriculture Rice wheat Tomato
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Abstract

Fungi are particularly valued as subsistence foods in many developing countries, where they make a significant food contribution in central and southern Africa during months of the year when the food supply is inadequate.
Like many soil microorganisms, they have physiological properties that allow them to feed on organic and inorganic soil substrates. As these properties are involved in the maintenance of soil fertility, these fungi could act as plant growth promoters.

Goal

From a collection of fungal strains isolated in Ghana and representing the genera Lentinus, Pleurotus and Ganoderma, the objectives of this study were the following:

To highlight certain physiological properties likely to be involved in the biological mechanisms promoting plant growth

To demonstrate under controlled conditions the effect of inoculation of the culture substrate by these strains on the growth of 2 plant species, tomato and durum wheat

Action

The fungal strains (7) were maintained on a nutrient medium of the "L-Broth" type and were subcultured on selective media in order to demonstrate the enzymatic activities of the esterase, chitinase and phosphatase types as well as their capacity to produce siderophores.

In a second phase, these strains were multiplied on a vermiculite substrate moistened with a nutrient medium of the "L-Broth" type. When the substrate was completely colonised by the fungal isolates, the inoculum produced was mixed with a culture substrate (atapulgite) where young tomato or durum wheat seedlings were planted.

Results

All strains tested have the ability to produce esterase enzymes, whereas only isolates from the genus Lentinus show chitinolytic activity. The production of siderophores was detected in strains belonging to the genera Ganoderma and Lentinus and in one strain of Pleurotus (strain PTR-K).The promoting effects of strain inoculation were also measured to varying degrees depending on the isolate in tomato after 6 weeks in the greenhouse

Fungal inoculation stimulated the growth of young durum wheat seedlings after one month of cultivation in the greenhouse with a maximum effect obtained with the SqW strain (Lentinus sp.) (Figure below).

Perspectives

The perspectives of this work will mainly consist in optimising the production of mushrooms AND their biofertilising properties by
Testing a greater diversity of edible fungi
Manipulating the composition of the culture substrate

The aim of the project will be to identify high-performance strains which, depending on an appropriate multiplication technique, will be able to offer significant production capacity but also proven biofertilising properties.

Project Images

Project Number : 1508-001

Year : 2015

Type of funding : PC

Project type : AWARD

Start date :
07 Feb 2016

End date :
07 May 2016

Flagship project :
Non

Project leader :
Robin Duponnois

Project leader's institution :
UPVD

Project leader's RU :
LGDP

Budget allocated :
10000 €

Total budget allocated ( including co-financing) :
10000 €

Funding :
Labex