Phosphorus Efficiency of Wheat (Triticum aestivum) Genotypes Inoculated with Mycorrhizal Fungi under Calcareous Soil Conditions | ||
| Egyptian Academic Journal of Biological Sciences, G. Microbiology | ||
| Article 2, Volume 10, Issue 1, June 2018, Pages 21-35 PDF (401.34 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eajbsg.2018.16311 | ||
| Authors | ||
| Abou El Seoud I. I.; Hoda A. Mahmoud; ELadly R. M. | ||
| Department of Soil and Agricultural Chemistry, Faculty of Agriculture, Saba Basha, Alexandria University, Egypt | ||
| Abstract | ||
| This research aimed to study P efficiency of six wheat genotypes (Triticum aestivum) inoculated with mycorrhizal fungi under three levels of P under calcareous soil conditions and to quantify the contribution of root growth and hyphae length in P uptake. Plants were grown in pots with three levels of P supply in soil P0 (without P fertilizer), P1 (50% of recommended P fertilizer, 75 mg P/kg soil), and P2 (100% of recommended P fertilizer, 150 mg P/kg soil). Half of the pots were treated with mixed mycorrhizal species (Glomus intraradices and Glomus macrocarpium) in with six replicates in randomized complete block design. The wheat genotypes were harvested 85 days after planting. The results showed that the response of shoot dry weight of wheat genotypes without mycorrhizae to increase of P supply was vigorous except genotype V6. In contrast, all the wheat genotypes inoculated with mycorrhizal fungi were less. All wheat genotypes with mycorrhizal inoculation except V4 with and without mycorrhizal and V6 without mycorrhizal attained more than 80% of its maximum shoot yield already at the lower level available. So all wheat genotypes with mycorrhizal inoculation were considered to be P efficient except V4 and all genotypes without mycorrhizal were regarded as P inefficient except V6. The wheat genotype V6 had extensive roots growth in limited P supply (P0) and the shorter roots observed in wheat genotype V4. The wheat genotype V6 had long hyphae length as compared to other wheat genotypes whereas the shorter hyphae length observed in wheat genotype V4. The adaptation of wheat genotypes to low level of soil P is closely related to better improved root system and the increase in the mycorrhizal hyphae length may be two of the main possible mechanisms of P efficiency in wheat. At low and high P level, the genotype V6 was given the highest values with and without mycorrhizal inoculation followed by V3 and V2, whereas genotype V4 was given the lowest values of the shoot P uptake followed by V5. In contrast, the results of this study suggested that root growth system and mycorrhizal hyphae length would be suitable parameters for selecting P efficient wheat genotypes especially under limited P supply. | ||
| Keywords | ||
| wheat genotypes; P levels; mycorrhizal fungi; calcareous soil | ||
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