scholarly journals Is there an association between root architecture and mycorrhizal growth response?

2014 ◽  
Vol 204 (1) ◽  
pp. 192-200 ◽  
Author(s):  
Hafiz Maherali
Keyword(s):  
Root Architecture ◽  
Growth Response ◽  
Mycorrhizal Growth Response

scholarly journals MYCORRHIZAL GROWTH RESPONSE AND GLOMALIN PRODUCTION EFFECTED BY ARBUSCULAR MYCORRHIZAL FUNGI (AMF) AND NITROGEN OF ORGANIC MATERIALS ON CORN

2017 ◽  
Vol 1 (1) ◽  
pp. 55
Author(s):  
Eddiwal, Amrizal Saidi, Eti Farda Husin and Azwar Rasyidin
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Host Plant ◽  
Mycorrhizal Fungi ◽  
Growth Response ◽  
Organic Materials ◽  
Arbuscular Mycorrhizal ◽  
Growth Effect ◽  
Organic N ◽  
Glomus Versiforme ◽  
Mycorrhizal Growth Response

Symbiotic relationships between arbuscular mycorrhizal fungi (AMF) and plants can increase the capacity of plants to absorb nutrients and water from the soil by exploring micropores not accessible to plant roots. The arbuscular mycorrhizal symbiosis between plants and soil fungi improves phosphorus and nitrogen acquisition under limiting conditions. Recent discoveries indicate that AMF hyphae containing glomalin as glycoproteins and function unitinge the soil particles to form stable soil aggregates. Glomalin acts as an adhesive (glue) produced by AMF symbiosis with the host plant. The AMF is capable of taking nitrogen and other nutrients from a source of organic materials to produce glomalin which is transferred to the host plant. The study was conducted using nitrogen from forage materials of Tithonia (Tithonia difersifolia) which the AMF needs to produce glomalin. This study assess the need for organic N by AMF to the mycorrhizal growth effect and its effects on glomalin. The study use sterile medium sand and zeolite mixture (w/w 1:1) in pot culture experiments with the corn as the host. For treatments using N derived from Tithonia are five doses, namely 0, 10, 20, 30, and 40 mg of N Tithonia each pot. At  the time of planting, the corn roots inoculated with AMF spores of the two species, namely Glomus luteum and Glomus versiforme. We show that a positive mycorrhizal growth response (MGR) was observed only in the dose of range 20 to 30 mg N. This response did not appear to be affected by high nitrogen supply. Our results also show that in Glomus luteum at the dose of 20 mg N produce glomalin highest, namely 2.60 mg.g-1 in the planting medium. Glomus versiforme has produced glomalin is 2.38 mg.g-1 at the dose of 30 mg N. The AMF species did not significantly affect the results of glomalin, while the use of N from forage materials of Tithonia significantly influenced the production of glomalin.

The influence of phosphorus fertilization, drought, fungal species, and nonsterile soil on mycorrhizal growth response in tall grass prairie plants

1986 ◽  
Vol 64 (6) ◽  
pp. 1199-1203 ◽  
Author(s):  
B. A. Daniels Hetrick ◽  
D. Gerschefske Kitt ◽  
G. Thompson Wilson
Keyword(s):  
Plant Growth ◽  
Growth Response ◽  
Phosphorus Fertilization ◽  
Indigenous Species ◽  
Glomus Etunicatum ◽  
Growth Responses ◽  
Tall Grass ◽  
Nonsterile Soil ◽  
Mycorrhizal Growth Response ◽  
Prairie Plants

In a series of experiments, factors effecting mycorrhizal growth response in prairie plants were examined. Two prairie grasses (Andropogon gerardii Vitman and Sorghastrum nutans (L.) Nash) and two forb species (Petalostemum purpureum (Venten) Rydb. and Liatris punctata Hook) benefited significantly from Glomus etunicatum Becker & Gerd. inoculation in fumigated or steamed soil. This benefit from mycorrhizae is probably related to phorphorus availability, since addition of 100 ppm phosphorus overcame the mycorrhizal growth response. No stimulation of growth occurred from additional vesicular–arbuscular, mycorrhizal inoculum to nonsterile soil. Neither was growth in nonsterile soil comparable to that achieved in inoculated, sterilized soil, suggesting a suppression of mycorrhizal growth response in nonsterile soil. In a related experiment addition of 1 or 10% nonsterile soil to sterilized, inoculated soil resulted in significantly reduced plant growth and greatly diminished mycorrhizal root colonization. Thus, soil microorganisms may suppress mycorrhizal growth responses, explaining the lack of mycorrhizal growth response observed in nonsterile soil. Of the four mycorrhizal fungi compared (Gigaspora rosea Nicol. & Schenk, Glomus deserticolum Trappe, Bloss & Menge, Glomus etunicatum Becker & Gerd., and Glomus mosseae (Nicol. & Gerd.) Gerd. & Trappe), the two indigenous species most stimulated plant growth. Under severe moisture stress (−4500 kPa) a significant mycorrhizal growth response was evident for G. etunicatum, but not for G. deserticolum inoculated plants. Growth response does not necessarily suggest drought tolerance, since the magnitude of response was similar in adequately watered and severely draughted plants.

Suppression of Mycorrhizal Growth Response of Big Bluestem by Non-Sterile Soil

Mycologia ◽  
1988 ◽  
Vol 80 (3) ◽  
pp. 338-343 ◽  
Author(s):  
G. W. T. Wilson ◽  
B. A. Daniels Hetrick ◽  
D. Gerschefske Kitt
Keyword(s):  
Growth Response ◽  
Big Bluestem ◽  
Sterile Soil ◽  
Mycorrhizal Growth Response

The effect of added nitrogen and phosphorus on mycorrhizal growth response and infection in Allium schoenoprasum

1989 ◽  
Vol 67 (11) ◽  
pp. 3227-3232 ◽  
Author(s):  
E. Bååth ◽  
J. Spokes
Keyword(s):  
Growth Response ◽  
Soil Phosphorus ◽  
Nitrogen Addition ◽  
Mycorrhizal Infection ◽  
Nitrogen And Phosphorus ◽  
Soil P ◽  
Ammonium N ◽  
Mycorrhizal Growth Response ◽  
Allium Schoenoprasum ◽  
Low Levels

The effect of different levels of phosphorus and nitrogen on mycorrhizal growth response and infection was studied using Allium schoenoprasum and Glomus caledonium. Nitrogen was added as ammonium or nitrate salt. Both the level of soil phosphorus and the level of nitrogen added affected the mycorrhizal growth response, which was greatest at intermediate levels of P and N. The nitrogen source did not affect the mycorrhizal growth response. At low levels of soil P, nitrogen addition did not affect mycorrhizal infection rate. High P and low N also had little influence. However, the combination of high P and high N gave much lower levels of mycorrhizal infection compared with the other treatments. This effect was most pronounced with ammonium N compared with nitrate N.

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