Factors Affecting Arbuscular Mycorrhizal Dependency of Wheat Genotypes With Different Phosphorus Efficiencies

Yao, Qing; Li, Xin; Christie, Peter

doi:10.1081/pln-100106991

Cited by 27 publications

(8 citation statements)

References 30 publications

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“…The higher P utilization efficiency in the shoots of hybrid maize plants requiring high rates of fertilizers (Table 1) might be a cause of the lower response to AM fungi. The present result supports those of Yao et al 23 , Zhu et al 24 and Baon et al 21 , who also found that the host plants with high P utilization efficiency gave lower mycorrhizal responses than those with lower P efficiency. …”

Section: Scienceasia Scienceasia Scienceasiasupporting

confidence: 82%

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Pitakdantham¹,

Suwanarit²,

Nopamornbodi³

et al. 2007

ScienceAsia

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A pot experiment was carried out with a sterilized soil to compare the enhancement of growth due to arbuscular mycorrhizal (AM) fungal inoculation in maize cultivars that differ in downy mildew resistance (DMR) and in their fertilizer requirements to attain maximum yields. A 4 x 3 factorial in complete randomized block design with 3 replications was employed. The first factor comprised two open-pollinated maize cultivars and two maize hybrids. The former two were Suwan-1 selection cycle 0 (SW1C0), a non-DMR cultivar and Suwan-1 selection cycle 11 (SW1C11), a cultivar with high yield at high soil fertility and DMR. The latter two were Suwan 2301 (SW2301), a cultivar requiring low rates of N and P fertilizers, and Suwan 3851 (SW3851), a cultivar requiring high rates of N and P fertilizers, both of which were downy mildew resistant. The second factor comprised three AM fungal inoculation practices, namely, non-inoculated with AM fungi, inoculated with Scutellospora fulgida and inoculated with Glomus aggregatum. The DMR and non-DMR maize cultivars gave comparable responses to AM fungi. The cultivar requiring high rate of fertilizers was lower in its response to AM fungi in P and K uptake than the cultivar requiring low rate of fertilizers. The lower response in P uptake was explained by higher P utilization efficiency of the cultivar whereas the lower response in K uptake was not related to K utilization efficiency of the cultivar. The maize cultivars lower in nutrient (N, P and K) efficiencies or in shoot dry weight gave greater responses to AM fungi in shoot dry weight.

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Section: Scienceasia Scienceasia Scienceasiasupporting

confidence: 82%

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Pitakdantham¹,

Suwanarit²,

Nopamornbodi³

et al. 2007

ScienceAsia

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“…Despite huge amount of available studies there is, however, no general mechanism that can explain the nature of high P efficiency. Phosphorus efficiency mechanisms, either at level of P acquisition from soil or efficient use of P in tissue, are often studied by using a limited number of genotypes as in the case of wheat (Horst et al, 1993;Gahoonia et al, 1999;Fageria and Baligar, 1999;Manske et al, 2002;Yao et al, 2001). To achieve a sufficient and useful genetic variation for P efficiency, a large number of genotypes is needed for screening.…”

Section: Introductionmentioning

confidence: 99%

Variation in phosphorus efficiency among 73 bread and durum wheat genotypes grown in a phosphorus-deficient calcareous soil

et al. 2005

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A greenhouse experiment was carried out to study the severity of phosphorus (P) deficiency symptoms on leaves, shoot dry matter production, and shoot concentration and content (the total amount per shoot) of P in 39 bread wheat (Triticum aestivum L.) and 34 durum wheat (Triticum durum L.) genotypes grown in a severely P-deficient calcareous soil with low (20 mg P kg −1 soil) and adequate (80 mg P kg −1 soil) P supply for 39 days. As the seed P concentration or content can affect plant performance under P-deficient conditions, the seeds of the genotypes used in the present study were also analyzed for P concentration. Phosphorus efficiency (relative shoot growth) of genotypes, calculated by the ratio of shoot dry matter production under low P to that under adequate P supply, significantly differed among the genotypes, and varied between 46.7% and 78.6%. Phosphorus efficiency ranged from 51% to 71% with an average of 61% for bread and from 47% to 79% with an average of 66% for durum wheat genotypes. There was no correlation between P efficiency ratio and P concentration of plants (R 2 = 0.0001), but P efficiency of all bread and durum wheat genotypes showed a very significant correlation with the P content (the total amount of P per shoot) (R 2 = 0.333 * * * ). The relationship between the P efficiency and total amount of P per shoot was much more significant in bread (R 2 = 0.341 * * * ) than in durum wheat (R 2 = 0.135 * ). Like shoot P concentrations, also severity of visible leaf symptoms of P deficiency on older leaves, including leaf chlorosis and necrosis, did not correlate with P efficiency. In most cases, genotypes showing higher P efficiency had higher absolute shoot dry weight under P deficient conditions. Under P deficient conditions, the absolute shoot dry weight very significantly correlated with shoot P content (R 2 = 0.665 * * * ), but the correlation between the absolute shoot dry weight and shoot P concentration tended to be negative. There was also variation in native seed P reserve of the genotypes, but this variation had no influence on the P efficiency. The results indicate that the total amount of P per shoot and shoot dry matter production at low P supply are most reliable parameters in ranking genotypes for P efficiency at early growth stage. In wheat germplasm tested in the present study, several wheat genotypes are available showing both very high P efficiency and very high shoot content and concentration of P suggesting that P acquisition ability should be most important mechanism for high P efficiency in such genotypes. On the other hand, there are also genotypes in the germplasm having more or less same P concentration or P content in shoot but differing substantially in P efficiency, indicating importance of P utilization at cellular level in P efficiency. All these results suggest that P efficiency mechanisms can be different from one genotype to other within a given plant species.

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“…In the present experiment, the calculated mycorrhizal dependency of sweet orange was only 3.5%, much lower than the value suggested by Tawaraya (2003). Many factors can influence mycorrhizal dependency, including plant P uptake efficiency (Yao et al, 2001a), P utilization efficiency (Baon et al, 1993), the P status of the soil (Plenchette and Morel, 1996), and carbohydrate allocation to roots (Yao et al, 2001b). Graham and Syvertsen (1985) demonstrated that plant growth rate could affect mycorrhizal dependency with citrus as host, and species with lower growth rates benefited less from AM inoculation.…”

Section: Discussionmentioning

confidence: 45%

Influence of an Arbuscular Mycorrhizal Fungus on Competition for Phosphorus Between Sweet Orange and a Leguminous Herb

Yao

Zhu

Chen

et al. 2005

Journal of Plant Nutrition

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(2005). Influence of an arbuscular mycorrhizal fungus on competition for phosphorus between sweet orange and a leguminous herb. Journal of Plant Nutrition, 28 (12) ABSTRACTGrass or herb intercropping with trees is widely practiced as an orchard-floor management strategy, but nutrient competition from grass species can inhibit the growth of intercropped fruit trees. Two experiments were conducted to investigate whether inoculation with the arbuscular mycorrhizal (AM) fungus Glomus versiforme can alleviate such competition and thus promote the growth of intercropped fruit trees by increasing soil nutrient exploitation. In the first experiment, intercropping was established in rhizoboxes containing sweet orange (Citrus sinensis) and the leguminous herb Stylosanthes gracilis inoculated with the AM fungus. Mycorrhizal inoculation did not appear to decrease competition, but increased the biomass of the herb much more than that of sweet orange. Inoculation had little effect on phosphorus (P) content of sweet orange, but significantly increased that of the legume roots. The AM fungal contribution to P uptake of the herb was twice that of sweet orange. Lateral roots of the herb tended to branch horizontally, with a large proportion entering the soil volume occupied by sweet orange; AM inoculation enhanced this effect. In Experiment 2, growth of the plants in monoculture revealed that the mycorrhizal dependency of the legume was much higher than that of sweet orange. It is suggested that mycorrhizal dependency can have a large influence on the role of the AM fungus in mediating competition in an intercropping system, and that fruit trees with high mycorrhizal dependency, together with a grass or herb with low mycorrhizal dependency, may be the optimum intercrop combination in orchards.

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Factors Affecting Arbuscular Mycorrhizal Dependency of Wheat Genotypes With Different Phosphorus Efficiencies

Cited by 27 publications

References 30 publications

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Variation in phosphorus efficiency among 73 bread and durum wheat genotypes grown in a phosphorus-deficient calcareous soil

Influence of an Arbuscular Mycorrhizal Fungus on Competition for Phosphorus Between Sweet Orange and a Leguminous Herb

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