Interação entre as condições de armazenamento e o desempenho biológico do fungo Trichoderma harzianum no cultivo de Impatiens hybrida
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Data
2026-02-02
Autores
Ribeiro, Layra Cortes da Silva
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Universidade Federal do Espírito Santo
Resumo
Impatiens hybrida hort., known as SunPatiens®, is an ornamental plant of high economic relevance, notable for its heat resistance. The fungus Trichoderma spp. is widely recognized for its potential as a plant biostimulant, although its application in Impatiens hybrida remains largely unexplored. This study evaluated the efficacy of Trichoderma harzianum on the morphoagronomic growth of SunPatiens® and the expression of DGL1, NAC1, and EXP1genes related to root development, as well as its viability in storage environments under two different temperatures. The experiment was conducted with two SunPatiens® varieties in a commercial substrate inoculated with T. harzianum (strain ESALQ 1306) and stored in two distinct environments. Microbiological counts were performed biweekly, and gene expression was analyzed by RT-qPCR using the 2 Ct method. Statistical analysis was performed using ANOVA, with residual normality checks and logarithmic data transformation when necessary. Results demonstrated that although the viability of T. harzianum (strain ESALQ 1306) remained stable in both locations, its efficacy was superior in plants where the substrate was stored in a mild temperature environment, in contrast to the high thermal stress environment. The highest gene expression occurred up to 20 days after inoculation, indicating that both time and temperature influence the functional activity of the fungus. Thus, it can be concluded that T. harzianum (strain ESALQ 1306) promoted the growth of Impatiens hybrida and stimulated the expression of genes related to root development. Despite the maintenance of fungal viability in both environments, its agronomic efficacy was higher when stored in locations with temperatures below 30 °C, highlighting the importance of adequate conditions to preserve its functionality as a bioinput
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Plantas ornamentais , Crescimento vegetal , Expressão gênica , Melhoramento de plantas , Ornamental plants , Plant growth , Gene expression , Plant improvement