Selecting alternative sterile and non-sterile substrates for mycorrhizal inoculant production

Barroso, Laura Mathias; Lisboa, Roberta Dias da Silva; Silveira, Silvaldo Felipe da; Samarão, Solange Silva; Rodrigues, Luciana Aparecida

doi:10.1590/0034-737x202269050014

Rev. Ceres

2022

DOI: 10.1590/0034-737x202269050014

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Selecting alternative sterile and non-sterile substrates for mycorrhizal inoculant production

Laura Mathias Barroso

Roberta Dias da Silva Lisboa

Silvaldo Felipe da Silveira

et al.

Abstract: Alternative substrates were evaluated for mycorrhizal inoculants production considering the beneficial effects of arbuscular mycorrhizal fungi (AMF) for plants and environment. The first step of the experiment aimed at evaluating the potential of substrates produced from sugarcane bagasse (SB), coconut fibre (CF) and urban waste compost (UWC) to produce AMF inoculants, by using Brachiaria decumbens as multiplier plant. The experiment has followed a randomized block design, at 7x3 factorial arrangement (seven s… Show more

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2024

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Cold storage promotes germination and colonization of arbuscular mycorrhizal fungal hyphae as propagules

Liu,

Ye,

Feng

et al. 2024

Front. Plant Sci.

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The inoculants of arbuscular mycorrhizal fungi (AMF) propagated by the in vitro culture system is important in scientific research; however, the long-term storage reduces the spore germination rate. The propagules of AMF consist of three components, including spores, hyphae and colonized root fragments. It is well known that cold storage can improve the germination rate of AMF spores, with limited investigations on the germination of other propagules. In this study, AMF inoculants were stored at 25°C or at 4°C (cold storage) to investigate the effect of cold storage on the propagule viability of the AMF Rhizophagus irregularis DAOM197198. The germination rate of propagules (spores, hyphae, root fragments) and their colonization ability were determined at 3 and 6 months after storage. The results showed that the spore germination rate remained unchanged after storage for 0 and 1 month at 25°C, but decreased rapidly after storage for 3 months. Furthermore, we investigated the hyphal germination rate for the first time. The germination rates of spores, hyphae and root fragments were significantly higher under cold storage compared to those at 25°C. Additionally, we classified the germ tubes of hypha into two types: long-type (L-type) and short type (S-type). The germination rate and the proportion of L-type germ tubes of hyphae significantly increased with cold storage time, which was conducive to colonization. The results of mycorrhizal colonization confirmed that cold storage significantly increased the colonization of hypha compared with 25°C treatment. Cold storage may break the dormancy of AMF propagules and activate related enzymes to promote the germination and colonization of propagules, which needs further investigation.

show abstract

Cold storage promotes germination and colonization of arbuscular mycorrhizal fungal hyphae as propagules

Liu,

Ye,

Feng

et al. 2024

Front. Plant Sci.

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show abstract

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Selecting alternative sterile and non-sterile substrates for mycorrhizal inoculant production

Cited by 1 publication

References 22 publications

Cold storage promotes germination and colonization of arbuscular mycorrhizal fungal hyphae as propagules

Cold storage promotes germination and colonization of arbuscular mycorrhizal fungal hyphae as propagules

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