Effect of Secondary Metabolites Present in Brassica nigra Root Exudates on Anthracene and Phenanthrene Degradation by Rhizosphere Microorganism

2018 ◽  
Vol 35 (3) ◽  
pp. 203-209 ◽  
Author(s):  
Any Carolina Garcés Mejía ◽  
Nancy J. Pino ◽  
Gustavo A. Peñuela
Keyword(s):  
Secondary Metabolites ◽  
Root Exudates ◽  
Brassica Nigra ◽  
Phenanthrene Degradation ◽  
Rhizosphere Microorganism

Root exudates modify bacterial diversity of phenanthrene degraders in PAH-polluted soil but not phenanthrene degradation rates

2010 ◽  
Vol 13 (3) ◽  
pp. 722-736 ◽  
Author(s):  
Aurélie Cébron ◽  
Brice Louvel ◽  
Pierre Faure ◽  
Christian France-Lanord ◽  
Yin Chen ◽  
...  
Keyword(s):  
Bacterial Diversity ◽  
Root Exudates ◽  
Polluted Soil ◽  
Phenanthrene Degradation ◽  
Degradation Rates

scholarly journals Decoupling of Plant Growth and Accumulation of Biologically Active Compounds in Leaves, Roots, and Root Exudates of Hypericum perforatum L. by the Combination of Jasmonate and Far-Red Lighting

Biomolecules ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1283 ◽  
Author(s):  
Martina Paponov ◽  
Manya Antonyan ◽  
Rune Slimestad ◽  
Ivan A. Paponov
Keyword(s):  
Secondary Metabolites ◽  
Plant Growth ◽  
Root Exudates ◽  
Hypericum Perforatum ◽  
Secondary Compounds ◽  
Biologically Active ◽  
Starch Accumulation ◽  
Combined Application ◽  
Hypericum Perforatum L ◽  
Spraying Plants

The plant hormone jasmonic acid (JA) fine tunes the growth–defense dilemma by inhibiting plant growth and stimulating the accumulation of secondary compounds. We investigated the interactions between JA and phytochrome B signaling on growth and the accumulation of selected secondary metabolites in Hypericum perforatum L., a medically important plant, by spraying plants with methyl jasmonate (MeJA) and by adding far-red (FR) lighting. MeJA inhibited plant growth, decreased fructose concentration, and enhanced the accumulation of most secondary metabolites. FR enhanced plant growth and starch accumulation and did not decrease the accumulation of most secondary metabolites. MeJA and FR acted mostly independently with no observable interactions on plant growth or secondary metabolite levels. The accumulation of different compounds (e.g., hypericin, flavonols, flavan-3-ols, and phenolic acid) in shoots, roots, and root exudates showed different responses to the two treatments. These findings indicate that the relationship between growth and secondary compound accumulation is specific and depends on the classes of compounds and/or their organ location. The combined application of MeJA and FR enhanced the accumulation of most secondary compounds without compromising plant growth. Thus, the negative correlations between biomass and the content of secondary compounds predicted by the growth-defense dilemma were overcome.

scholarly journals Exogenous Inoculation of Microorganisms Effect on Root Exudates and Rhizosphere Microorganism of Tobaccos

2021 ◽  
Vol 11 (09) ◽  
pp. 510-528
Author(s):  
Qingqing Guo ◽  
Jun Yu ◽  
Jingguo Sun ◽  
Changjun Wang ◽  
Shouwen Chen ◽  
...  
Keyword(s):  
Root Exudates ◽  
Rhizosphere Microorganism

Microorganisms and nematodes increase levels of secondary metabolites in roots and root exudates of Plantago lanceolata

2009 ◽  
Vol 329 (1-2) ◽  
pp. 117-126 ◽  
Author(s):  
Susanne Wurst ◽  
Roel Wagenaar ◽  
Arjen Biere ◽  
Wim H. van der Putten
Keyword(s):  
Secondary Metabolites ◽  
Root Exudates ◽  
Plantago Lanceolata

Profiling of secondary metabolites in root exudates of Arabidopsis thaliana

2014 ◽  
Vol 108 ◽  
pp. 35-46 ◽  
Author(s):  
Nadine Strehmel ◽  
Christoph Böttcher ◽  
Stephan Schmidt ◽  
Dierk Scheel
Keyword(s):  
Arabidopsis Thaliana ◽  
Secondary Metabolites ◽  
Root Exudates

scholarly journals The Sorghum bicolor Root Exudate Sorgoleone Shapes Bacterial Communities and Delays Network Formation

mSystems ◽  
2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Peng Wang ◽  
Yen Ning Chai ◽  
Rebecca Roston ◽  
Franck E. Dayan ◽  
Daniel P. Schachtman
Keyword(s):  
Secondary Metabolites ◽  
Microbial Communities ◽  
Root Exudates ◽  
Soil Microbes ◽  
Structure And Function ◽  
Soil Microbe ◽  
Primary And Secondary Metabolites ◽  
Microbe Interactions ◽  
Key Drivers ◽  
And Function

ABSTRACT Primary and secondary metabolites exuded from roots are key drivers of root-soil microbe interactions that contribute to the structure and function of microbial communities. Studies with model plants have begun to reveal the complex interactions between root exudates and soil microbes, but little is known about the influence of specialized exudates from crop plants. The aims of this work were to understand whether sorgoleone, a unique lipophilic secondary benzoquinone exuded only from the root hairs of sorghum, influences belowground microbial community structure in the field, to assess the effect of purified sorgoleone on the cultured bacteria from field soils, and to determine whether sorgoleone inhibits nitrification under field conditions. Studies were conducted comparing wild-type sorghum and lines with genetically reduced sorgoleone exudation. In the soil near roots and rhizosphere, sorgoleone influenced microbial community structure as measured by β-diversity and network analysis. Under greenhouse conditions, the soil nitrogen content was an important factor in determining the impacts of sorgoleone. Sorgoleone delayed the formation of the bacterial and archaeal networks early in plant development and only inhibited nitrification at specific sampling times under field conditions. Sorgoleone was also shown to both inhibit and promote cultured bacterial isolate growth in laboratory tests. These findings provide new insights into the role of secondary metabolites in shaping the composition and function of the sorghum root-associated bacterial microbiomes. Understanding how root exudates modify soil microbiomes may potentially unlock an important tool for enhancing crop sustainability and yield in our changing environment. IMPORTANCE Plant roots exude a complex mixture of metabolites into the rhizosphere. Primary and secondary metabolites exuded from roots are key drivers of root-soil microbe interactions that contribute to the structure and function of microbial communities in agricultural and natural ecosystems. Previous work on plant root exudates and their influence on soil microbes has mainly been restricted to model plant species. Plant are a diverse group of organisms and produce a wide array of different secondary metabolites. Therefore, it is important to go beyond studies of model plants to fully understand the diverse repertoire of root exudates in crop plant species that feed human populations. Extending studies to a wider array of root exudates will provide a more comprehensive understanding of how the roots of important food crops interact with highly diverse soil microbial communities. This will provide information that could lead to tailoring root exudates for the development of more beneficial plant-soil microbe interactions that will benefit agroecosystem productivity.

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