Interação de isolados de Trichoderma spp. e preparados homeopáticos : estudo in vitro e no desenvolvimento inicial do tomateiro-cereja
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Data
2016-05-20Autor
França, Danilo Vieira Cardozo
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The fungi of genus Trichoderma are found inhabiting the rhizosphere of plants
acting as biological control agents and plant growth promoters. The
homeopathic preparations have the potential to assist the vegetative
development, promoting adaptation to climate conditions and absorption of
nutrients. The interaction between techniques that aim the sustainability of the
production system is one of the principles of agroecological view. This study
aimed to evaluate the interaction of Trichoderma spp. and homeopathic
preparations in vitro and initial development of cherry tomato. The isolates of
Trichoderma spp., obtained in the laboratory from soil samples, were subjected
to in vitro assays for evaluating the production of indoleacetic acid and
phosphate solubilization. The selected isolates were analyzed in relation to
mycelial growth, sporulation and germination of spores under the influence of
homeopathic treatments (Carbo vegetabilis 6CH and Phosphorus 6CH). In the
experiment with cherry tomato, were compared the plant height, stem diameter,
fresh and dry shoot, root, leaves and stems, also was determined the leaf area,
chemical composition found in the shoot using homeopathic treatments Carbo
vegetabilis 6CH and Phosphorus 6CH, such as Trichoderma “F”, “R” and
Trichodermil®. The in vitro tests showed that two isolates produced indoleacetic
acid and four isolates were higher in phosphate solubilization. It was also
observed that Phosphorus increased the speed of mycelial growth of
Trichoderma, and positively influenced the sporulation of the isolates. The Carbo vegetabilis treatment provided an increased number of germinated
conidia of Trichoderma “F” isolated. In the experiment with cherry tomato it was
found that the use of treatments did not influenced on plant height, but it was
observed interaction between Trichderma and homeophatic preparations in the
increase of diameter stem. It has been found that the use of Trichoderma
promoted an increased leaf area index, fresh and dry weight of leaves. The
homeopathic treatment Carbo vegetabilis 6CH provided gains on the plant
roots. The homeopathic treatments and Trichoderma isolades had influence on
cherry tomato above the use of soil nutrients.