ARBUSCULAR MYCORRHIZA FUNGI PROMOTES GROWTH OF TOMATO SEEDLINGS IN THE ABSENCE OF PHOSPHATE IN NUTRIENT SOLUTION
Journal Title: ASIAN JOURNAL OF NATURAL & APPLIED SCIENCES - Year 2018, Vol 7, Issue 1
Abstract
Greenhouse experiments were conducted to investigate the effect of commercial arbuscular mycorrhiza fungi (AMF) inoculation on growth of tomato (Solanum lycopersicum) plants grown in cocopeatsin which phosphate (KH2PO4) was either added or omitted.Non inoculated control plants as well as those inoculated with Glomusintraradices, Glomusmossea or a mixture of both AMF species were grown with and without phosphate. Seven weeks after planting, the plants were analysed for mycorrhiza colonization of the roots, growth enhancement, and phosphate uptake.The percentage root colonization of the inoculated plants ranged from 42.67-76.67% and the highestroot colonization were found in plants that did not receive phosphate. The highest shoot and root dry weights were obtained in plants supplied with phosphates and inoculated with either G. intraradices(5.2 g and 4.7 g respectively) or G. mossea (5.7 g and 4.3 g respectively). Co-inoculationof both AMF resulted in a lower shoot (3.5 g) and root dry weight (2.4 g) when phosphate was omitted, but higher shoots (5.2 g) and root dry weights (3.6 g) when phosphate was added. G. intraradices and G. mossea inoculated plants without phosphate addition produced significantly higher shoot dry weight (5.1 g and 5.0 g respectively) compared to non-inoculated treatments with added phosphate (4.1 g). Analysis of phosphorus concentration in the leaves showed that G. intraradices and G. mossea inoculated plants had the highest phosphorus concentrations (0.69 and 0.63 % respectively), while the non-mycorrhizal plants (0.54 %) and plants that were coinoculatedwith both AMFs (0.54 %)hadthe lowest phosphorus concentration, when phosphate was omitted from the nutrient solution.The results suggest that it may be possible to reduce phosphate application while increasing the growth of tomato plants by inoculating plants with AMFs
Authors and Affiliations
Abdulkareem M. Taoheed, Elijah M. Ateka, Turoop Losenge
Keywords
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