Interactions between a vesicular-arbuscular mycorrhizal fungus ( Glomus intraradices ) and Streptomyces coelicolor and their effects on sorghum plants grown in soil amended with chitin of brawn scales

2000 ◽  
Vol 32 (5) ◽  
pp. 401-409 ◽  
Author(s):  
G. M. Abdel-Fattah ◽  
A. H. Mohamedin
Keyword(s):  
Glomus Intraradices ◽  
Arbuscular Mycorrhizal Fungus ◽  
Streptomyces Coelicolor ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Vesicular Arbuscular

scholarly journals Micropropagated Banana Infected with Meloidogyne javanica Responds to Glomus intraradices and Phosphorus

HortScience ◽  
1997 ◽  
Vol 32 (1) ◽  
pp. 101-103 ◽  
Author(s):  
Jorge Pinochet ◽  
Carolina Fernández ◽  
María de Carmen Jaizme ◽  
Pedro Tenoury
Keyword(s):  
Glomus Intraradices ◽  
Root Colonization ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Meloidogyne Javanica ◽  
Root Knot Nematode ◽  
Growth And Nutrition ◽  
Vesicular Arbuscular ◽  
Low Potassium

The effects of the interaction between the vesicular-arbuscular mycorrhizal fungus Glomus intraradices Schenk and Smith and the root-knot nematode Meloidogyne javanica (Treub) Chitwood on growth and nutrition of micropropagated `Grand Naine' banana (Musa AAA) were studied under greenhouse conditions. Inoculation with G. intraradices significantly increased growth of plants in relation to nonmycorrhizal plants and was more effective than P fertilization in promoting plant development. Mycorrhizal colonization did not affect nematode buildup in the roots, although plants with the nematode and mycorrhiza were more galled. Meloidogyne javanica had no effect on the percentage of root colonization in mycorrhiza-inoculated plants. No element deficiency was detected by foliar analysis. All elements were within sufficiency levels for banana with exception of N, which was low. Potassium levels were lower in mycorrhizal plants, while Ca and Mg levels were higher with mycorrhiza than without, with or without the nematode. Early inoculation with G. intraradices appears to favor growth of banana plants by enhancing plant nutrition.

Effect of Glomus intraradices on infection by Fusarium oxysporum f.sp. radicis-lycopersici in tomatoes over a 12-week period

1986 ◽  
Vol 64 (3) ◽  
pp. 552-556 ◽  
Author(s):  
M. Caron ◽  
J. A. Fortin ◽  
C. Richard
Keyword(s):  
Fusarium Oxysporum ◽  
Glomus Intraradices ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Observation Time ◽  
Root Pathogen ◽  
Tomato Plants ◽  
Vesicular Arbuscular ◽  
Root Necrosis

The interaction between Glomus intraradices Schenck & Smith, a vesicular–arbuscular mycorrhizal fungus, and Fusarium oxysporum Schlecht f.sp. radicis-lycopersici Jarvis & Shoemaker and its effect on tomato plants were investigated over a 12-week period. The root colonization by Glomus was not affected by the presence of Fusarium. The number of Fusarium propagules was consistently lower when the plants were inoculated with Glomus. The presence of Glomus decreased root necrosis caused by Fusarium in weeks 5, 11, and 12, but no significant effect was observed for the other 9 weeks. The results obtained at any observation time for the endomycorrhizal colonization and the Fusarium population, but not for the percent of root necrosis evaluation, were consistent throughout the 12-week experiment. It is concluded that the parameters used to study the interaction between a vesicular–arbuscular mycorrhizal fungus, a fungal root pathogen, and a host plant must be measured at different times after inoculation with the pathogen to make sure that observations are representative of the interaction under study.

scholarly journals AN APPARENT INCREASE IN SYMPLASTIC WATER CONTRIBUTES TO GREATER TURGOR IN MY CORRHIZAL ROOTS OF DROUGHTED ROSA PLANTS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1096d-1096
Author(s):  
Robert Augé ◽  
Ann Stodola
Keyword(s):  
Osmotic Potential ◽  
Glomus Intraradices ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Vesicular Arbuscular ◽  
Lower Root ◽  
Moisture Treatment ◽  
Mycorrhizal Roots ◽  
Osmotic Potentials

Using psychrometric pressure-volume analysis, root water relations following drought were characterized in Rosa hybrida L. plants colonized by the vesicular-arbuscular mycorrhizal fungus Glomus intraradices Schenck & Smith. Measurements were also made on uncolonized plants of similar size and adequate phosphorus nutrition. Under well-watered conditions mycorrhizal colonization resulted in lower solute concentrations in root symplasm, and hence lower root turgors. Following drought, however, mycorrhizal roots maintained greater turgor across a range of tissue hydration. This effect was apparently not due to increased osmotic adjustment (full turgor osmotic potentials were similar in mycorrhizal and nonmycorrhizal roots after drought) or to altered elasticity but to an increased partitioning of water into the symplast. Symplast osmolality at full turgor was equivalent in mycorrhizal and nonmycorrhizal roots but because of higher symplastic water percentages mycorrhizal roots had greater absolute numbers of osmotic (symplastic) solutes. Drought-induced osmotic potential changes were observed only in mycorrhizal roots, where a 0.4 megapascal decrease (relative to well-watered controls) brought full turgor osmotic potential of mycorrhizae to the same level as nonmycorrhizal roots under either moisture treatment.

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