The Impact of Growth-Promoting Streptomycetes Isolated from Rhizosphere and Bulk Soil on Oilseed Rape (Brassica napus L.) Growth Parameters

Cinkocki, Renata; Lipková, Nikola; Javoreková, Soňa; Petrová, Jana; Maková, Jana; Medo, Juraj; Ducsay, Ladislav

doi:10.3390/su13105704

Cited by 5 publications

(1 citation statement)

References 82 publications

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“…Colonization of plant roots by PGPR can induce a systemic resistance in plants [25]. Growth Promoting Streptomyces from the rhizosphere of oilseed rape is a promising strategy to improve the growth of oilseed rape [26].…”

Section: Streptomyces As Plant Growth-promoting Bacteriamentioning

confidence: 99%

Challenges to Explore Genus Streptomyces in Ethiopia-A Mini Review

Abatneh¹

2021

J Biomed Res Environ Sci

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Genus Streptomyces is gram-positive bacteria that grow in various environments. It has plentiful biotechnological attributes on the area of agricultural, bioremediation, biofuel, clinical, food, industrial, medical, pharmaceutical, and veterinary. The aim of the review is to frontward challenges to explore potent Streptomyces species in the case of Ethiopia. There is lack of the extent and quality of the genetic research regarding to genome sequence, bioactive compound discovery, and genetic manipulation. Their functional and structural diversity is not full studied. To find a new Streptomyces species: Culture media formulation and optimization as wells culture-independent method like Next Generation Sequencing approach should incorporate at national level.

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Section: Streptomyces As Plant Growth-promoting Bacteriamentioning

confidence: 99%

Challenges to Explore Genus Streptomyces in Ethiopia-A Mini Review

Abatneh¹

2021

J Biomed Res Environ Sci

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Comparative analysis of two neighboring conducive and suppressive soils towards plant parasitism caused by Phelipanche ramosa L. Pomel on Brassica napus L.

Martinez

Pouvreau

Jestin

et al. 2023

Preprint

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Background In western France, rapeseed farmers face significant yield losses due to root parasitism caused by Phelipanche ramosa, a holoparasite plant of the Orobanchaceae family. Recently, a reduction of parasitic plant development has been observed in fields with history of severe infestation. In a same given pedoclimatic environment, this so-called soil-suppression of parasitism might presumably result from microbial mechanisms targeting P. ramosa. We tested this hypothesis on two soils from neighboring rapeseed fields, with similar physicochemical properties but contrasted parasitism, characterized as suppressive and conducive. We assessed these soils in a hydroponic co-cultivation system of P. ramosa and B. napus, and simultaneously sampled rhizosphere exudates weekly, as well as rhizosphere and rapeseed roots at three time points along parasite development. Comparisons were thus drawn between conducive and suppressive soils, both in untreated or gamma-sterilized conditions, regarding the effects of soil derived signaling metabolites on broomrape key early parasitic stages (i.e. germination and pre-haustorium development), late parasite development as well as soil bacterial and fungal structures. Results We demonstrate that the suppressive soil mitigates broomrape parasitism by reducing both parasite attachments and development, while causing tubercle necrosis. Activity assays on initial soils as well as co-cultivation rhizosphere exudates reveal that pre-attachment stages of broomrape are not affected by suppression. Root exudates, either they were collected from plants cultivated on suppressive or conducive soils, exerted similar contribution on the induction of broomrape seed germination and on haustoria formation. Thus, attachment and post-attachment stages are more likely to be suppressed by soil microbiota. Given the observed dissimilarities in microbial composition between the soils, we suggest that rather than bacteria, fungi play a greater part in parasitism suppression. Because suppression is not correlated with fungal diversity during co-cultivation, we suspect that in addition to general microbial interactions, specific groups of fungi participate in parasitism reduction. Further correlation network analyses (WGCNA) propose that three clusters of ASVs are indeed correlated with suppressive parasitic traits by their abundance. In these clusters, 7 ASVs are inversely correlated with parasitic attachment and one is positively correlated with the occurrence of necrotic tubercles, while being more abundant in the suppressive soil (DEseq2). These 7 ASVs are from Nectriaceae, Niessliaceae, Bartaliniaceae, Holtermanniaceae families as well as from Helotiales and Pleosporales orders, while the last ASV is identified as a Berkeleyomyces sp., a necrotrophic fungal genus known as a causal agent of black root rot. Conclusion This study explains the observed contrasted parasite development on two physiochemically similar soils by linking parasitic infestation to fungal dynamics in the rhizosphere. This finding extends our knowledge of disease suppressive soils to plant parasitism and proposes biological leads for potential biocontrol of broomrape.

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The Recent Use of Plant-Growth-Promoting Bacteria to Promote the Growth of Agricultural Food Crops

Reed

Glick

2023

Agriculture

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In the past 15–20 years, the employment of Plant-Growth-Promoting Bacteria (PGPB) to facilitate the growth of agricultural food crops has increased dramatically. These beneficial soil bacteria, whose use and demonstrations of efficacy have previously been largely limited to the laboratory, have now been shown to be effective under field conditions. In addition, the mechanisms that these bacteria utilize to facilitate plant growth are now mostly well characterized. Moreover, several companies across the globe have commercialized a number of PGPB and there is every indication that this trend will continue to grow. As a consequence of these developments, in this review article, a large number of recent reports on the successful testing of many different types of PGPB and their effects on various food crops is discussed.

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The Impact of Growth-Promoting Streptomycetes Isolated from Rhizosphere and Bulk Soil on Oilseed Rape (Brassica napus L.) Growth Parameters

Cited by 5 publications

References 82 publications

Challenges to Explore Genus Streptomyces in Ethiopia-A Mini Review

Challenges to Explore Genus Streptomyces in Ethiopia-A Mini Review

Comparative analysis of two neighboring conducive and suppressive soils towards plant parasitism caused by Phelipanche ramosa L. Pomel on Brassica napus L.

The Recent Use of Plant-Growth-Promoting Bacteria to Promote the Growth of Agricultural Food Crops

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