Bacterial Ammonia Causes Significant Plant Growth Inhibition

Weise, Teresa; Kai, Marco; Piechulla, Birgit

doi:10.1371/journal.pone.0063538

Cited by 62 publications

(54 citation statements)

References 43 publications

(68 reference statements)

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“…Recently, Weise et al . () revealed that rhizobacteria may emit high levels of ammonia, which during co‐cultivation in compartmented Petri dishes caused alkalization of the neighboring plant medium and subsequently reduced the growth of A. thaliana (Weise et al ., ). However, the observed antifungal effect of volatiles emitted by Collimonas strains in this work was not due to ammonia emission and changes in the pH.…”

Section: Discussionmentioning

confidence: 99%

Volatiles produced by the mycophagous soil bacteriumCollimonas

Garbeva

Hordijk

Gerards

et al. 2013

FEMS Microbiol Ecol

153

147

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It is increasingly recognized that volatile organic compounds play an import role during interactions between soil microorganisms. Here, we examined the possible involvement of volatiles in the interaction of Collimonas bacteria with soil fungi. The genus Collimonas is known for its ability to grow at the expense of living fungi (mycophagy), and antifungal volatiles may contribute to the attack of fungi by these bacteria. We analyzed the composition of volatiles produced by Collimonas on agar under different nutrient conditions and studied the effect on fungal growth. The volatiles had a negative effect on the growth of a broad spectrum of fungal species. Collimonas bacteria did also produce volatiles in sand microcosms supplied with artificial root exudates. The production of volatiles in sand microcosms was enhanced by the presence of fungi. The overall picture that we get from our study is that antifungal volatiles produced by Collimonas could play an important role in realizing its mycophagous lifestyle. The current work is also interesting for understanding the ecological relevance of volatile production by soil bacteria in general as we found strong influences of root exudates composition and incubation conditions on the spectrum of volatiles produced.

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Section: Discussionmentioning

confidence: 99%

Volatiles produced by the mycophagous soil bacteriumCollimonas

Garbeva

Hordijk

Gerards

et al. 2013

FEMS Microbiol Ecol

153

147

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“…Although strong growth promotion – which turned out to be partly due to CO 2 emission (Kai & Piechulla, ) – was confirmed in many cases, these early studies also reported drastic growth inhibition, phytotoxic effects, and even plant killing within a few days (Vespermann et al , ; Blom et al , ). The volatiles responsible were identified mainly as inorganic compounds; for example, hydrogen cyanide (HCN; Blom et al , ) or ammonia (Weise et al , ). Later work demonstrated that some organic volatiles were phytotoxic as well, especially when applied in high (micromolar to millimolar) concentrations.…”

Section: Direct Effects Of Bacterial Volatiles On Plant Healthmentioning

confidence: 99%

Airborne medicine: bacterial volatiles and their influence on plant health

2019

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Summary Like most other eukaryotes, plants do not live alone but in close association with a diverse microflora. These plant‐associated microbes contribute to plant health in many different ways, ranging from modulation of hormonal pathways to direct antibiosis of plant pathogens. Over the last 15 yr, the importance of volatile organic compounds as mediators of mutualistic interactions between plant‐associated bacteria and their hosts has become evident. This review summarizes current knowledge concerning bacterial volatile‐mediated plant protection against abiotic and biotic stresses. It then discusses the translational potential of such metabolites or of their emitters for sustainable crop protection, the possible ways to harness this potential, and the major challenges still preventing us from doing so. Finally, the review concludes with highlighting the most pressing scientific gaps that need to be filled in order to enable a better understanding of: the molecular mechanisms underlying the biosynthesis of bacterial volatiles; the complex regulation of bacterial volatile emission in natural communities; the perception of bacterial volatiles by plants; and the modes of actions of bacterial volatiles on their host.

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“…The role that ammonia might play in bacterial–plant interactions (Table ) is still poorly understood and not often considered or investigated (Table S3). Kai et al () and Weise et al () clearly demonstrated that ammonia as a component of the bacterial volatile mixture led, via alkalization of the growth medium, to drastic phytotoxic effects on A. thaliana . This negative effect was mostly observed when bacterial isolates were grown on peptide‐rich medium suggesting that degradation of amino acids was the source of ammonia formation.…”

Section: Biological Effects Of Microbial Inorganic Volatile Compoundsmentioning

confidence: 99%

Effects of discrete bioactive microbial volatiles on plants and fungi

Piechulla

Lemfack

Kai

2017

Plant Cell & Environment

Self Cite

149

106

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Plants live in association with microorganisms, which are well known as a rich source of specialized metabolites, including volatile compounds. The increasing numbers of described plant microbiomes allowed manifold phylogenetic tree deductions, but less emphasis is presently put on the metabolic capacities of plant-associated microorganisms. With the focus on small volatile metabolites we summarize (i) the knowledge of prominent bacteria of plant microbiomes; (ii) present the state-of-the-art of individual (discrete) microbial organic and inorganic volatiles affecting plants and fungi; and (iii) emphasize the high potential of microbial volatiles in mediating microbe-plant interactions. So far, 94 discrete organic and five inorganic compounds were investigated, most of them trigger alterations of the growth, physiology and defence responses in plants and fungi but little is known about the specific molecular and cellular targets. Large overlaps in emission profiles of the emitters and receivers render specific volatile organic compound-mediated interactions highly unlikely for most bioactive mVOCs identified so far.

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Bacterial Ammonia Causes Significant Plant Growth Inhibition

Cited by 62 publications

References 43 publications

Volatiles produced by the mycophagous soil bacteriumCollimonas

Volatiles produced by the mycophagous soil bacteriumCollimonas

Airborne medicine: bacterial volatiles and their influence on plant health

Effects of discrete bioactive microbial volatiles on plants and fungi

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