Increased hyphal branching and growth of ectomycorrhizal fungus Lactarius rufus by the helper bacterium Paenibacillus sp

Mycorrhiza ◽  
2013 ◽  
Vol 23 (5) ◽  
pp. 403-410 ◽  
Author(s):  
T. J. Aspray ◽  
E. E. Jones ◽  
M. W. Davies ◽  
M. Shipman ◽  
G. D. Bending
Keyword(s):  
Ectomycorrhizal Fungus ◽  
Hyphal Branching ◽  
Paenibacillus Sp ◽  
Lactarius Rufus

The effect of infection by Lactarius rufus or Scleroderma flavidum on the uptake of 63Ni by paper birch

1988 ◽  
Vol 66 (5) ◽  
pp. 934-940 ◽  
Author(s):  
Melanie D. Jones ◽  
Jack Dainty ◽  
Thomas C. Hutchinson
Keyword(s):  
Ectomycorrhizal Fungus ◽  
The Other ◽  
Metabolic Energy ◽  
Metabolic Inhibitor ◽  
Nickel Tolerance ◽  
Mycorrhizal Association ◽  
Paper Birch ◽  
Ni Uptake ◽  
Inoculation Treatment ◽  
Lactarius Rufus

Nickel tolerance of birch seedlings is increased by infection with one ectomycorrhizal fungus, Scleroderma flavidum, but not by another, Lactarius rufus. The possibility that this difference is related to differences in uptake and (or) translocation of Ni was investigated using 63Ni. Mycorrhizal and nonmycorrhizal seedlings were grown either with or without Ni for 22 weeks before the presentation of 63Ni to roots. Both control and pretreated seedlings were exposed to 63Ni, in 85 μM Ni, for periods of 2 min to 48 h. After Ni uptake, the roots were desorbed with 50 mM Ca at 5 °C for 30 min. Total nonexchangeable 63Ni uptake into roots was unaffected by inoculation treatment, either in the presence or absence of dinitrophenol, a general metabolic inhibitor. However, the amount of Ca-exchangeable Ni was significantly affected by infection, and was lowest in S. flavidum infected seedlings. Additionally, infection influenced the effect of dinitrophenol on Ni uptake into shoots. Application of dinitrophenol increased Ni uptake into the shoots of L. rufus infected and uninfected plants, but this increase did not occur in S. flavidum infected plants. All shoots absorbed similar amounts of Ni in the absence of dinitrophenol. Thus, the S. flavidum birch mycorrhizae do not require metabolic energy to reduce Ni translocation from roots to shoots, while the other seedlings do. This may contribute to the increased Ni tolerance of this mycorrhizal association.

scholarly journals Role of Suillus placidus in Improving the Drought Tolerance of Masson Pine (Pinus massoniana Lamb.) Seedlings

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 332
Author(s):  
Min Li ◽  
Haoyun Wang ◽  
Xizhou Zhao ◽  
Zhongke Lu ◽  
Xueguang Sun ◽  
...  
Keyword(s):  
Drought Stress ◽  
Defense Mechanism ◽  
Southern China ◽  
Dry Weight ◽  
Pinus Massoniana ◽  
Photosynthetic Performance ◽  
Ectomycorrhizal Fungus ◽  
Severe Drought ◽  
Masson Pine ◽  
Pine Seedlings

Masson pine is an important afforestation species in southern China, where seasonal drought is common. The present study focused on the effects of Suillus placidus, an ectomycorrhizal fungus, inoculation on the growth and physiological and biochemical performance of masson pine seedlings under four different watering treatments (well-watered, mild drought, moderate drought, and severe drought) to evaluate the symbiotic relationship between S. placidus and masson pine seedlings. Ectomycorrhizal-inoculated (ECM) and non-inoculated (NM) seedlings were grown in pots and maintained for 60 days using the weighing method. Results showed that seedlings’ growth, dry weight, RWC, chlorophyll content, PSII efficiency, and photosynthesis decreased as drought stress intensified in both ECM and NM plants. This suggests that drought stress significantly limits the growth and photosynthetic performance of masson pine seedlings. Nevertheless, increased An/gs and proline contents in both NM and ECM prevented oxidative damage caused by drought stress. In addition, increased peroxidase (POD) activity is an essential defense mechanism of ECM seedling under drought stress. Compared with NM, ECM seedlings showed faster growth, higher RWC, and photosynthetic performance, and lower lipid peroxidation in cell membranes under drought stress, as indicated by higher POD activity and lower proline and malondialdehyde (MDA). Our experiment found that S. placidus inoculation can enhance the drought resistance of masson pine seedlings by increasing antioxidant enzyme activity, water use efficiency, and proline content, thereby enhancing growth under water-deficiency conditions. S. placidus can be used to cultivate high-quality seedlings and improve their survival in regions that experience seasonal droughts.

Understanding introduction history: Genetic structure and diversity of the edible ectomycorrhizal fungus, Suillus luteus, in Patagonia (Argentina)

Mycologia ◽  
2021 ◽  
pp. 1-10
Author(s):  
María Belén Pildain ◽  
Paula Marchelli ◽  
María Marta Azpilicueta ◽  
Cristian Starik ◽  
Carolina Barroetaveña
Keyword(s):  
Genetic Structure ◽  
Ectomycorrhizal Fungus ◽  
Suillus Luteus ◽  
Introduction History ◽  
Genetic Structure And Diversity

scholarly journals Svalbamides A and B, Pyrrolidinone-Bearing Lipodipeptides from Arctic Paenibacillus sp.

Marine Drugs ◽  
2021 ◽  
Vol 19 (4) ◽  
pp. 229
Author(s):  
Young Eun Du ◽  
Eun Seo Bae ◽  
Yeonjung Lim ◽  
Jang-Cheon Cho ◽  
Sang-Jip Nam ◽  
...  
Keyword(s):  
Reductase Activity ◽  
Quinone Reductase ◽  
The Arctic ◽  
Amino Acid Residues ◽  
Chemopreventive Agents ◽  
Svalbard Archipelago ◽  
Paenibacillus Sp ◽  
Combinational Analysis ◽  
Culture Extract ◽  
The Absolute

Two new secondary metabolites, svalbamides A (1) and B (2), were isolated from a culture extract of Paenibacillus sp. SVB7 that was isolated from surface sediment from a core (HH17-1085) taken in the Svalbard archipelago in the Arctic Ocean. The combinational analysis of HR-MS and NMR spectroscopic data revealed the structures of 1 and 2 as being lipopeptides bearing 3-amino-2-pyrrolidinone, d-valine, and 3-hydroxy-8-methyldecanoic acid. The absolute configurations of the amino acid residues in svalbamides A and B were determined using the advanced Marfey’s method, in which the hydrolysates of 1 and 2 were derivatized with l- and d- forms of 1-fluoro-2,4-dinitrophenyl-5-alanine amide (FDAA). The absolute configurations of 1 and 2 were completely assigned by deducing the stereochemistry of 3-hydroxy-8-methyldecanoic acid based on DP4 calculations. Svalbamides A and B induced quinone reductase activity in Hepa1c1c7 murine hepatoma cells, indicating that they represent chemotypes with a potential for functioning as chemopreventive agents.

scholarly journals Draft genome sequence data of the facultative, thermophilic, xylanolytic bacterium Paenibacillus sp. strain DA-C8

Data in Brief ◽  
2021 ◽  
Vol 35 ◽  
pp. 106784
Author(s):  
Chinda Chhe ◽  
Ayaka Uke ◽  
Sirilak Baramee ◽  
Umbhorn Ungkulpasvich ◽  
Chakrit Tachaapaikoon ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Sequence Data ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Genome Sequence Data ◽  
Paenibacillus Sp

scholarly journals Inocybe brijunica sp. nov., a New Ectomycorrhizal Fungus from Mediterranean Croatia Revealed by Morphology and Multilocus Phylogenetic Analysis

2021 ◽  
Vol 7 (3) ◽  
pp. 199
Author(s):  
Armin Mešić ◽  
Danny Haelewaters ◽  
Zdenko Tkalčec ◽  
Jingyu Liu ◽  
Ivana Kušan ◽  
...  
Keyword(s):  
Rna Polymerase Ii ◽  
National Park ◽  
Hot Spot ◽  
Phylogenetic Reconstruction ◽  
Ectomycorrhizal Fungus ◽  
Alkaline Solutions ◽  
Rrna Gene ◽  
28S Rrna ◽  
Internal Transcribed Spacer Region ◽  
Biogeographical Region

A new ectomycorrhizal species was discovered during the first survey of fungal diversity at Brijuni National Park (Croatia), which consists of 14 islands and islets. The National Park is located in the Mediterranean Biogeographical Region, a prominent climate change hot-spot. Inocybe brijunica sp. nov., from sect. Hysterices (Agaricales, Inocybaceae), is described based on morphology and multilocus phylogenetic data. The holotype collection was found at the edge between grassland and Quercus ilex forest with a few planted Pinus pinea trees, on Veli Brijun Island, the largest island of the archipelago. It is easily recognized by a conspicuous orange to orange–red–brown membranaceous surface layer located at or just above the basal part of the stipe. Other distinctive features of I. brijunica are the medium brown, radially fibrillose to rimose pileus; pale to medium brown stipe with fugacious cortina; relatively small, amygdaliform to phaseoliform, and smooth basidiospores, measuring ca. 6.5–9 × 4–5.5 µm; thick-walled, utriform, lageniform or fusiform pleurocystidia (lamprocystidia) with crystals and mostly not yellowing in alkaline solutions; cheilocystidia of two types (lamprocystidia and leptocystidia); and the presence of abundant caulocystidia only in the upper 2–3 mm of the stipe. Phylogenetic reconstruction of a concatenated dataset of the internal transcribed spacer region (ITS), the nuclear 28S rRNA gene (nrLSU), and the second largest subunit of RNA polymerase II (rpb2) resolved I. brijunica and I. glabripes as sister species.

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