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Open AccessArticle

Role of Trichoderma aggressivum f. europaeum as Plant-Growth Promoter in Horticulture

1
Departamento de Agronomía, Escuela Superior de Ingeniería, Universidad de Almería, 04120 Almería, Spain
2
Centro de Investigación, Experimentación y Servicios del Champiñón (CIES), Quintanar del Rey, 16220 Cuenca, Spain
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(7), 1004; https://doi.org/10.3390/agronomy10071004
Received: 4 June 2020 / Revised: 6 July 2020 / Accepted: 8 July 2020 / Published: 13 July 2020
The main objective of this study was to determine the capacity of Trichoderma aggressivum f. europaeum to promote pepper and tomato seedling growth compared to that of T. saturnisporum, a species recently characterised as a biostimulant. Consequently, in vitro seed germination and seedling growth tests were performed under commercial plant nursery conditions. Additionally, the effects of different doses and a mixture of both species on seedling growth under plant nursery and subsequently under greenhouse conditions were determined. Furthermore, mass production of spores was determined in different substrates, and their siderophore and indole acetic acid production and phosphate (P) solubilisation capacity were also determined. Direct application of Trichoderma aggressivum f. europaeum to seeds in vitro neither increases the percentage of pepper and tomato seed germination nor improves their vigour index. However, substrate irrigation using different doses under commercial plant nursery conditions increases the quality of tomato and pepper seedlings. Tomato roots increased by 66.66% at doses of 106 spores per plant. Applying T. aggressivum f. europaeum or T. saturnisporum under plant nursery conditions added value to seedlings because their growth-promoting effect is maintained under greenhouse conditions up to three months after transplantation. The combined application of the two species had no beneficial effect in relation to that of the control. The present study demonstrates the biostimulant capacity of T. aggressivum f. europaeum in pepper and tomato plants under commercial plant nursery and greenhouse conditions. View Full-Text
Keywords: Trichoderma; plant growth promotion; tomato; pepper; biostimulant Trichoderma; plant growth promotion; tomato; pepper; biostimulant
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Sánchez-Montesinos, B.; Diánez, F.; Moreno-Gavíra, A.; Gea, F.J.; Santos, M. Role of Trichoderma aggressivum f. europaeum as Plant-Growth Promoter in Horticulture. Agronomy 2020, 10, 1004.

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