Potential of Trichoderma spp. as consistent plant growth stimulators |
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| Authors: | Margaret A Ousley James M Lynch John M Whipps |
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| Institution: | (1) Microbiology and Crop Protection Department, Horticulture Research International, BN17 6LP Littlehampton, West Sussex, UK;(2) Present address: School of Biological Sciences, University of Surrey, GU2 5XH Guildford, Surrey, UK |
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| Abstract: | In a series of repeated trials, six Trichoderma spp. strains, applied as a dried powder from a liquid fermentation in molasses/yeast medium, proved to be consistent at promoting the growth of lettuce (Latuca sativa L.) seedlings grown in a peat-sand potting compost in the glasshouse. Strains WT, 92, 20, and 75 at 0.75% or 1% w:w concentrations increased shoot dry weight by up to 26%, although WT did inhibit germination. For example, after 4 days only 13% of seeds sown in WT 1% w:w treated compost had germinated, whereas in other treatments germination was consistently greater than 32%. WT increased shoot fresh and dry weights by 14.3 g and 0.6 g per pot, respectively, without affecting the root dry weights, to give concomitant increases in shoot: root ratios of fresh and dry weight. The potential use of these Trichoderma spp. strains for plant growth promotion is discussed. |
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| Keywords: | Growth stimulator Inocula Lettuce Trichoderma spp |
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