PHOSPHATE SOLUBILIZATION CAPACITY AND INDOLE ACETIC ACID PRODUCTION BY Trichoderma STRAINS FOR BIOMASS INCREASE ON BASIL AND MINT PLANTS

Abstract

The use of microorganisms in medicinal plants may provide an increase in biomass. The objective of this work was to evaluate the efficiency and capacity of Trichoderma strains to solubilize phosphate and to synthesize indole acetic acid (IAA) in vitro in the biomass production of two medicinal plants, basil and mint. Cultures were inoculated with two species of Trichoderma. The crop biomass as well as the relative efficiency were determined. Trichoderma species that solubilized phosphate and produced IAA, provided significant results in the accumulation of biomass of the crops, with relative efficiency of 276% for mint and 141% for basil, in relation to the control. The Trichoderma isolates showed phosphate solubilization capacity and IAA synthesis. Therefore, the studied crops presented biomass increase. These strains verified their capacity as plant growth promoters.

Soybean productivity with Trichoderma asperellum seed treatment in different regions of the Brazilian Cerrado

“…Trichoderma inoculation in soybean, like Chagas et al (2017a), Gonçalves et al (2018) and Chagas Junior et al (2019a, b) who concluded that Trichoderma acts as a promoter of vegetable growth positively affecting biomass and soybean productivity.…”

“…They are usually studied as biocontrol agents (Monte et al, 2019;Ramada et al, 2019;Pascholati et al, 2019) and present plant growth promoting activities (Das et al, 2017;Woo & Pepe, 2018;Mendoza-Mendoza et al, 2018). In plants, some Trichoderma strains produce secondary metabolites such as 3-indoleacetic acid (IAA), which acts in promoting the growth of vegetative parts (Chagas et al, 2017a).…”

“…The promotion of plant growth by the action of Trichoderma is complex and involves biochemical processes, enzyme production (Monte et al, 2019;Ramada et al, 2019), production of hormones and growth factors, besides the provision of nutrients, mainly phosphates. The ability of such microorganisms to perform phosphate solubilization has been adopted to replace or reduce the use of soluble phosphate fertilizers (Chagas et al, 2017a;Bononi et al, 2020).…”

Microrganismos potenciais e incremento de biomassa em grama esmeralda (Zoysia japonica Steud.)

“…Fungos do gênero Trichoderma são uns dos principais microrganismos de importância para o aumento do crescimento vegetal. Chagas et al (2017), ao testar a ação de Trichoderma spp. inoculadas em solo fertilizado com fosfato natural, afirma efeitos favoráveis na promoção do crescimento e eficiência no uso do fósforo em plantas de arroz em ambiente controlado.…”

Selección y caracterización de microorganismos con capacidad antifúngica y fertilizante aislados de la rizosfera de plantas de yerba mate de la provincia de Misiones para su aplicación como promotores del crecimiento vegetal

“…Para poder ejercer cualquiera de los efectos de promoción del crecimiento vegetal, este microorganismo debe colonizar las raíces de las plantas ya sea superficial o endofíticamente y para ello muchas de las especies de Trichoderma, entre otras herramientas, expresan diversas enzimas degradadoras de la pared celular, tal como celulasas, lipasas, pectinasas, amilasas, entre otras. Posteriormente a una eficiente colonización, los PGPM pertenecientes a este género, frecuentemente incrementan la absorción de nutrientes, la resistencia al estrés abiótico y biótico, el crecimiento de las raíces, las plantas se desarrollan mejor, y consecuentemente aumentan la productividad del cultivo (Chagas et al, 2017;Stewart & Hill, 2014). En la Figura 4.1, se muestran en forma gráfica las acciones benéficas que las especies del género Trichoderma pueden realizar al interaccionar con las plantas, que incluyen casi todas las estrategias posibles de los PGPM tal como, competencia, antibiosis, parasitismo y resistencia sistémica inducida.…”