Summary
Troyer citrange is an important citrus root-stock but a slow grower. Eighteen different vesicular-arbuscular mycorrhizal (VAM) fungi were screened for their symbiotic response with Troyer citrange in unsterilized soil. Of the 18 fungi,Glomus macrocarpum (Ruakura),G. caledonicum (Nedlands),G. velum (Nedlands),G. monosporum (Nedlands),Gigaspora margarita (Ruakura), gave the greatest improvements in growth and nutrition, resulting in larger leaf area, plant height, stem diameter, and plant biomass, with higher P, Zn and Cu contents. All the five fungi were statistically on a par with each other in improving the growth and nutrition of Troyer citrange. Inoculations with these fungi allowed the rootstock to reach a stem diameter of pencil thickness, i.e., ready for budding, in about 13–14 months in contrast to 18–19 months without mycorrhizal inoculations, thus saving about 5–6 months.
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Vinayak, K., Bagyaraj, D.J. Vesicular-arbuscular mycorrhizae screened for Troyer citrange. Biol Fertil Soils 9, 311–314 (1990). https://doi.org/10.1007/BF00634107
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DOI: https://doi.org/10.1007/BF00634107