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  • Author or Editor: Shanyn Goodnight x
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Pepper (Capsicum sp. L.) seedlings were inoculated with either Glomus sp. AZ 112 (isolated from Wickman, Ariz.), Glomus intraradices Smith and Schneck (isolated from Santa Theresa, N.M.), a mixture of the two isolates, or a nonmycorrhizal control, and were grown for 8 weeks in a moderate (20.7 to 25.4C) or high temperature (32.1 to 38.0C) environment. Plants in moderate temperatures were larger and had lower specific soil respiration (Rspsoil) (μmol CO2/m2/s per gram root tissue dry weight) compared with those in high temperatures. In moderate temperatures, mycorrhizal plants were smaller and had higher Rspsoil than nonmycorrhizal controls. In high temperatures, plants inoculated with the isolate mixture grew nearly twice as large and had lower Rspsoil compared with plants inoculatedwith the individual isolates or the nonmycorrhizal control. Results suggest an improved carbon economy and a synergistic enhancement of pepper growth caused by the mixture of VAM fungal isolates that was not achieved by inoculation with single isolates alone under conditions of high-temperature stress.

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Pepper (Capsicum sp. L.) seedlings were inoculated with either Glomus sp. AZ 112 (isolated from Wickman, Ariz.), Glomus intraradices Smith and Schneck (isolated from Santa Theresa, N.M.), a mixture of the two isolates, or a nonmycorrhizal control, and were grown for 8 weeks in a moderate (20.7 to 25.4C) or high temperature (32.1 to 38.0C) environment. Plants in moderate temperatures were larger and had lower specific soil respiration (Rspsoil) (μmol CO2/m2/s per gram root tissue dry weight) compared with those in high temperatures. In moderate temperatures, mycorrhizal plants were smaller and had higher Rspsoil than nonmycorrhizal controls. In high temperatures, plants inoculated with the isolate mixture grew nearly twice as large and had lower Rspsoil compared with plants inoculatedwith the individual isolates or the nonmycorrhizal control. Results suggest an improved carbon economy and a synergistic enhancement of pepper growth caused by the mixture of VAM fungal isolates that was not achieved by inoculation with single isolates alone under conditions of high-temperature stress.

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