Vesicular-arbuscular mycorrhizal inoculation of kiwifruit (Actinidia deliciosa) micropropagated plants

A greenhouse experiment was conducted to monitor the development of symbiotic interaction between the vesicular–arbuscular mycorrhizal (VAM) fungus Glomus aggregatum and Vigna unguiculata grown in a typical Oxisol before and after the soil was subjected to simulated erosion and at various levels of phosphorus in the soil solution. VAM development monitored in terms of P status of cowpea leaf disks revealed that VAM activity was not detected in the eroded soil unless the soil was amended with P. When P was not limiting, VAM activity (effectiveness) was detected as early as 17 days from planting, the activity peaking 5–10 days thereafter. Peak VAM activity was observed at a soil solution P level of 0.026 μg/mL and the peak values were similar in the eroded and uneroded soil samples. Maximum mycorrhizal inoculation effect was also observed at this level of soil solution P. Our results illustrate the usefulness of the leaf-disk technique for monitoring the development of the VAM symbiosis and the significance of soil solution P in regulating host response to VAM inoculation.

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Effects of vesicular-arbuscular mycorrhizal inoculation at different soil P availabilities on growth and nutrient uptake of in vitro propagated coffee ( Coffea arabica L. ) plants

Mycorrhiza ◽

10.1007/s005720050153 ◽

1997 ◽

Vol 6 (6) ◽

pp. 493-497 ◽

Cited By ~ 23

Author(s):

P. Vaast ◽

R. J. Zasoski ◽

C. S. Bledsoe

Keyword(s):

Nutrient Uptake ◽

Coffea Arabica ◽

Arbuscular Mycorrhizal ◽

Soil P ◽

Vesicular Arbuscular ◽

Mycorrhizal Inoculation ◽

Coffea Arabica L

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Mycorrhizal Inoculation Enhances Growth and Development of Micropropagated Plants of Avocado

HortScience ◽

10.21273/hortsci.27.7.785 ◽

1992 ◽

Vol 27 (7) ◽

pp. 785-787 ◽

Cited By ~ 28

Author(s):

M.T. Vidal ◽

C. Azcón-Aguilar ◽

J.M. Barea ◽

F. Pliego-Alfaro

Keyword(s):

Growth And Development ◽

Mycorrhizal Fungus ◽

Arbuscular Mycorrhizal ◽

Persea Americana ◽

Potting Medium ◽

Mycorrhiza Formation ◽

Key Factor ◽

Micropropagated Plants ◽

Mycorrhizal Inoculation ◽

Axenic Conditions

Micropropagated plantlets of avocado (Persea americana Mill.) exhibit a very slow rate of growth during the acclimatization phase, possibly because mycorrhizae are absent. Inoculation of plantlets with the vesicular-arbuscular mycorrhizal fungus Glomus fasciculatum (Thaxter sensu Gerd) Gerd and Trappe improved formation of a well-developed root system that was converted into a mycorrhizal system. Introduction of the mycorrhizal fungus at the time plantlets were transferred from axenic conditions to ex vitro conditions improved shoot and root growth; enhanced the shoot: root ratio; increased the concentration and/or content of N, P, and K in plant tissues; and helped plants to tolerate environmental stress at transplanting. Inclusion of soil as a component of the potting medium appeared to favor mycorrhiza formation and effectiveness. Thus, mycorrhiza formation seems to be the key factor for subsequent growth and development of micropropagated plants of avocado.

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The effect of vesicular-arbuscular mycorrhizal inoculation on the growth and root colonization of ten strawberry cultivars

Agricultural and Food Science ◽

10.23986/afsci.72457 ◽

1992 ◽

Vol 1 (5) ◽

pp. 527-535 ◽

Cited By ~ 2

Author(s):

Mauritz Vestberg

Keyword(s):

Root Colonization ◽

Arbuscular Mycorrhizal ◽

Dry Weight ◽

Mycorrhizal Dependency ◽

Vam Fungi ◽

Shoot Dry Weight ◽

Vesicular Arbuscular ◽

Mycorrhizal Inoculation ◽

Dependency Index ◽

Strawberry Cultivars

Ten strawberry cultivars, four early maturing, three late maturing and three “special” cultivars, were inoculated with six strains of vesicular-arbuscular mycorrhizal (VAM) fungi in a pot experiment. Growth effects and colonization of the VAM fungi were studied. Three strains, Glomus macrocarpum V3, G. mosseae Rothamsted and G. sp. V4, were highly efficient, causing significant growth increases in most cultivars. ’Jonsok’ showed the highest mycorrhizal dependency index, 648, and ’Ostara’ the lowest, 269, for the mean response of all six fungi. The fungal strains which increased shoot growth the most also increased the runner plant formation the most. Early cultivars showed higher colonization percentages than late maturing cultivars. Sporulation of the introduced VAM fungi was on average more abundant in early and special cultivars than in late cultivars. Root colonization and strawberry shoot dry weight correlated significantly in most cultivars, but the correlation between colonization and runner formation was generally poor.

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