scholarly journals Investigation on the carbon and nitrogen transfer from a terminal leaf to the root system of rice plant by a double tracer method with 13C and 15N.

1983 ◽  
Vol 52 (3) ◽  
pp. 331-341 ◽  
Author(s):  
Kunio OKANO ◽  
Jiro TATSUMI ◽  
Tadakatsu YONEYAMA ◽  
Yasuhiro KONO ◽  
Tsumugu TOTSUKA
Keyword(s):  
Root System ◽  
Rice Plant ◽  
Nitrogen Transfer ◽  
Tracer Method ◽  
Carbon And Nitrogen

Carbon and nitrogen transfer in leaf litter mixtures

2013 ◽  
Vol 57 ◽  
pp. 341-348 ◽  
Author(s):  
S. Linnea Berglund ◽  
Göran I. Ågren ◽  
Alf Ekblad
Keyword(s):  
Leaf Litter ◽  
Nitrogen Transfer ◽  
Carbon And Nitrogen ◽  
Litter Mixtures

scholarly journals Algal-fungal symbiosis leads to photosynthetic mycelium

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Zhi-Yan Du ◽  
Krzysztof Zienkiewicz ◽  
Natalie Vande Pol ◽  
Nathaniel E Ostrom ◽  
Christoph Benning ◽  
...  
Keyword(s):  
Physical Contact ◽  
Biofuel Production ◽  
Nitrogen Transfer ◽  
Free Living ◽  
Important Species ◽  
Carbon And Nitrogen ◽  
Isotope Tracer ◽  
Fungal Symbiosis ◽  
Mortierella Elongata ◽  
Tracer Experiments

Mutualistic interactions between free-living algae and fungi are widespread in nature and are hypothesized to have facilitated the evolution of land plants and lichens. In all known algal-fungal mutualisms, including lichens, algal cells remain external to fungal cells. Here, we report on an algal–fungal interaction in which Nannochloropsis oceanica algal cells become internalized within the hyphae of the fungus Mortierella elongata. This apparent symbiosis begins with close physical contact and nutrient exchange, including carbon and nitrogen transfer between fungal and algal cells as demonstrated by isotope tracer experiments. This mutualism appears to be stable, as both partners remain physiologically active over months of co-cultivation, leading to the eventual internalization of photosynthetic algal cells, which persist to function, grow and divide within fungal hyphae. Nannochloropsis and Mortierella are biotechnologically important species for lipids and biofuel production, with available genomes and molecular tool kits. Based on the current observations, they provide unique opportunities for studying fungal-algal mutualisms including mechanisms leading to endosymbiosis.

scholarly journals EFFECTS OF VESICULAR-ARBUSCULAR MYCORRHIZA ON 14C AND 15N DISTRIBUTION IN NODULATED FABABEANS

1980 ◽  
Vol 60 (2) ◽  
pp. 241-250 ◽  
Author(s):  
P. C. PANG ◽  
E. A. PAUL
Keyword(s):  
Dry Matter ◽  
Nitrogen Transfer ◽  
Apparent Difference ◽  
Plant Materials ◽  
Carbon And Nitrogen ◽  
Vesicular Arbuscular ◽  
Normal Atmospheric Pressure ◽  
Mycorrhizal Plants ◽  
The Difference ◽  
Microbial Systems

A two-compartment growth chamber in which the aboveground plant materials were exposed to 14CO2 and the belowground portion was exposed to 15N2 under normal atmospheric pressure was designed for carbon and nitrogen transfer studies. Vicia faba infected with vesicular-arbuscular fungus Glomus mossae and non-mycorrhizal plants fixed similar quantities of N2 at an age of 6½ wk. Approximately 0.10 mg N was fixed∙g−1 dry plant materials∙day−1 and 40 mg C∙g−1 dry matter day−1 were synthesized by mycorrhizal and non-mycorrhizal fababeans during 48 h exposure to 14CO2 at 6½ wk with no apparent difference in yield of dry matter. The non-mycorrhizal plants transferred 37% of the fixed 14C beneath ground. The mycorrhizal ones transferred 47% of the fixed 14C beneath ground. Most of the difference could be accounted for in the belowground respiration. The 14CO2 produced by root-microbial systems of the mycorrhizal fababeans was twice as great as that of the nonmycorrhizal; both contained active rhizobium.

scholarly journals Cultivar Difference in the Response of Root System to Nitrogen Application in Rice Plant.

1993 ◽  
Vol 62 (3) ◽  
pp. 447-455 ◽  
Author(s):  
Saneaki TANAKA ◽  
Akira YAMAUCHI ◽  
Yasuhiro KONO
Keyword(s):  
Root System ◽  
Rice Plant ◽  
Nitrogen Application ◽  
Cultivar Difference

scholarly journals Availability of carbon and nitrogen in soil affects Metarhizium robertsii root colonization and transfer of insect-derived nitrogen

2019 ◽  
Vol 95 (10) ◽  
Author(s):  
Larissa Barelli ◽  
Scott W Behie ◽  
Michael J Bidochka
Keyword(s):  
Ammonium Nitrate ◽  
Root Colonization ◽  
Pathogenic Fungus ◽  
Broth Culture ◽  
Nitrogen Transfer ◽  
Symbiotic Association ◽  
Metarhizium Robertsii ◽  
Carbon And Nitrogen ◽  
Ecological Importance ◽  
Fungal Gene Expression

ABSTRACT The endophytic, insect pathogenic fungus, Metarhizium, exchanges insect-derived nitrogen for photosynthate as part of a symbiotic association similar to well-known mycorrhizal relationships. However, little is known about this nitrogen transfer in soils where there is an abundance of nitrogen and/or carbon. Here, we applied D-glucose and ammonium nitrate to soil to examine the effect on root colonization and transfer of labelled nitrogen (15N) from an insect (injected with 15N-ammonium sulfate) to Metarhizium robertsii, into leaves of the common bean, Phaseolus vulgaris, over the course of 28 days. Application of exogenous carbon and/or nitrogen to soils significantly reduced detectable 15N in plant leaves. Metarhizium root colonization, quantified with real-time PCR, revealed colonization persisted under all conditions but was significantly greater on roots in soil supplemented with glucose and significantly lower in soil supplemented with ammonium nitrate. Fungal gene expression analysis revealed differential expression of sugar and nitrogen transporters (mrt, st3, nrr1, nit1, mep2) when Metarhizium was grown in pure broth culture or in co-culture with plant roots under various carbon and nitrogen conditions. The observation that Metarhizium maintained root colonization in the absence of nitrogen transfer, and without evidence of plant harm, is intriguing and indicates additional benefits with ecological importance.

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