Abstract
Five tropical soils were either not inoculated or inoculated with the vesicular-arbuscular mycorrhizal (VAM) fungus Glomus aggregatum. The degree to which VAM effectiveness was expressed in the soils was evaluated prior and after solution P status was adjusted for optimal VAM activity. VAM effectiveness determined by monitoring P concentrations of pinnules of Leucaena leucocephala leaves as a function of time and as dry matter yield determined at the time of harvest, indicated that in three of the soils VAM effectiveness was either very restricted or altogether unexpressed irrespective of vesicular-arbuscular mycorrhizal fungal (VAMF) inoculation if soil solution P was not optimized for VAM effectiveness. After P optimization, effectiveness was significantly increased by VAMF inoculation although in four of the soils, densities of indigenous VAMF propagules greatly exceeded that attained by the inoculum after it was mixed with soil. Mycorrhizal fungal inoculation effects varied from soil to soil, depending on the extent to which the effectiveness of indigenous and introduced endophytes was enhanced by P optimization and the similarity of inherent soil solution P concentrations to the range known to be optimum for VAM effectiveness. Of the indicator variables monitored, VAMF colonization was least sensitive to treatment effects followed by shoot P concentration measured at the time of harvest.
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References
Allen M F 1991 The Ecology of Mycorrhizae. Cambridge University Press, New York. 168 p.
Bolan N E 1991 A critical review of the role of mycorrhizal fungi in the uptake of phosphorus by plants. Plant and Soil 134, 189–207.
Fox R L and Kamprath E J 1970 Phosphate sorption isotherms for evaluating P requirements of soils. Soil Sci. Soc. Am. Proc. 34, 902–907.
Gianinazzi-Pearson V and Diem H G 1982 Endomycorrizae in the tropics. In Microbiology of Tropical Soils and Plant Productivity. Eds. Y R Dommergues and H G Diem. pp 209–251. Martinus Nijhoff Publishers BV, Dordrecht.
Giovannetti M and Mosse B 1980 An evaluation of techniques for measuring vesicular-arbuscular mycorrhizal infection in roots. New Phytol. 84, 489–500.
Habte M 1989 Impact of simulated erosion on the abundance and activity of indigenous vesicular-arbuscular mycorrhizal endophytes in an oxisol Biol. Fertil. Soils 7, 164–167.
Habte M and Aziz T 1991 Relative importance of Ca, N, and P in enhancing mycorrhiza activity in Leucaena leucocephala grown in an oxisol subjected to simulated erosion. J. Plant. Nutr. 14, 429–442.
Habte M and R IFox 1988 Leucaena leucocephala seedling response to vesicular-arbuscular mycorrhizal inoculation in soils with varying levels of inherent mycorrhizal activity. Biol. Fertil. Soils. 8, 111–115.
Habte M and Manjunath A 1991 Categories of vesicular-arbuscular mycorrhizal dependency of host species. Mycorrhiza 1, 3–12.
Habte M and Manjunath A 1987 Soil solution phosphorus status and mycorrhizal dependency in Leucaena leucocephala. Appl. Environ. Microbiol. 53, 791–801.
Habte M, Fox R L and Huang R S 1987 Determining vesicular-arbuscular mycorrhizal effectiveness by monitoring P status of subleaflets of an indicator plant. Commun. Soil Sci. Plant Anal. 18, 1403–1420.
Habte M, Fox R L, Aziz T and El-Swaify S A 1988 Interaction of vesicular-arbuscular mycorrhizal fungi with erosion in an oxisol. Applied Environ. Microbiol. 54, 945–950.
Hayman D S 1987 VA mycorrhizas in field crop systems. In Ecophysiology of VA Mycorrhizal Plants. Ed. G R Safir. pp 171–192. CRC Press, Inc. Boca Raton, FL.
Ikawa H, Sato H H, Chang A K S, Nakamura S, RobelloJr E and Periaswarmy S P 1985 Soils of the Hawaii Agricultural Experiment Station. Research Extension Series 022, College of Tropical Agriculture and Human Resources, University of Hawaii, Honolulu, HI.
Kormanik P P, Schultz R C and Bryan W C 1982 The influence of vesicular-arbuscular mycorrhizae on the growth and development of eight hardwood tree species. Forest Sci. 28, 531–539.
Lambert D H, HCole and D EBaker 1980. Adaptation of vesicular-arbuscular mycorrhizae to edaphic factors. New Phytol. 85, 513–520.
Manjunath A and Habte M 1990 Establishment of soil solution P levels for studies involving vesicular-arbuscular mycorrhizal symbiosis. Commun. Soil Sci. Plant Anal. 21, 557–566.
Miller J CJr., Rajapakse S and Gerber R K 1986 Vesicular-arbuscular mycorrhizae in vegetable crops. Hortic. Sci. 21, 974–984.
Mosse B 1981 Vesicular-arbuscular mycorrhizal research for tropical agriculture. Res. Bull. 194, 5–82 HITAHR, Univ. of Hawaii, Honolulu, HI.
Mosse B, Stribley D P and Letacon F 1981 Ecology of mycorrhizae. Adv. Microbial. Ecol. 5, 137–210.
Murphy J and Riley J P 1962 A modified single solution method for the determination of phosphate in natural waters. Anal. Chim. Acta 27, 31–36.
Powell C Ll 1980 Mycorrhizal infectivity of eroded soils. Soil Biol. Biochem. 12, 247–250.
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Contribution from Hawaii Institute of Tropical Agriculture and Human Resources Journal series No. 3781.
Contribution from Hawaii Institute of Tropical Agriculture and Human Resources Journal series No. 3781.
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Habte, M., Fox, R.L. Effectiveness of VAM fungi in nonsterile soils before and after optimization of P in soil solution. Plant Soil 151, 219–226 (1993). https://doi.org/10.1007/BF00016287
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DOI: https://doi.org/10.1007/BF00016287