Trichoderma spp. na Produção de Mudas de Espécies Florestais

Abstract

RESUMOSementes sadias e rápido desenvolvimento de plântulas de espécies florestais nativas são fundamentais para o seu estabelecimento. Este trabalho avaliou o efeito de Trichoderma spp. sobre sementes e o desenvolvimento de plântulas de Parapiptadenia rigida (angico), Cedrela fissilis (cedro) e Pelthophorum dubium (canafistula). O fungo foi aplicado em diferentes momentos da produção de mudas. Sua ação foi diferenciada entre as espécies, bem como, entre as variáveis analisadas. O cedro foi menos responsivo à aplicação de Trichoderma spp. em qualquer momento da produção de mudas. A associação de Trichoderma spp. com angico, via tratamento de sementes, favoreceu a incidência de alguns patógenos, entretanto a aplicação mais tardia do fungo favoreceu o desenvolvimento da parte aérea. Sobretudo, em canafístula, o tratamento de sementes proporcionou controle de patógenos associados à semente e favoreceu a emergência e a produção de folhas nas mudas, apresentando potencial para ser usado tratamento de sementes desta espécie.Palavras-chave: promotor de crescimento, sementes, tratamento de sementes. Trichoderma spp. in the Production of Seedling of Forest Species ABSTRACTSeeds healthy and rapid development of seedlings of native species may be critical to the success of your establishment. This study evaluated the effect of Trichoderma spp. on seed and seedling development of Parapiptadenia rigida (angico), Cedrela fissilis (cedro) and Pelthophorum dubium (canafistula). The fungi was applied at different times of the production of seedlings. The fungi action was different between species and between the variables. Cedro was less responsive to application of Trichoderma spp. at any time of the seedlings production and the association of Trichoderma spp. With angico as the seed treatment favored the incidence of some pathogens, however the application later favored only the leaves development. In canafístula, the seed treatment provided control of pathogens associated and stimulated the emergence and production of leaves in seedlings, have potential to be used for seed treatment of this species.

Trichoderma spp. and its effects on seeds physiological quality and seedlings development of African mahogany

“…it is recommended for maintaining the vigor and germination of J. mimosifolia seeds, after 12 months of storage. Junges et al (2016) verified that Trichoderma isolates colonized all seeds of Pelthophorum dubium (Spreng.) Taub.…”

“…Evaluating C. fissilis (Cedro) seedlings subjected to treatment with Trichoderma, Junges et al (2016) verified the action of treatments only on the aerial part length, where the later application produced seedlings with a larger aerial part. On the other hand, application via substrate was responsible for less developed seedlings; however, the treatments action was compensated by the root growth, since the total length did not differ between treatments.…”

“…Results contrary to those found, regarding germination, were reported by Bernardes et al (2011) when, evaluating the same T. asperelllum isolates used in this study (T09, T12 and T52), they observed an 18% reduction in the germination of Dalbergia spruceana (Amazon rosewood) in relation to the control, by treating the seeds with T. asperellum T09. In addition, Junges et al (2016), when testing Trichoderma spp. at different times in the seedlings production process of native forest species, verified damage to the emergence of Parapiptadenia rigida (Angico) seedlings by the application of 5/7…”

“…These authors reported that inoculation of Trichoderma sp. did not increase this variable; however, Junges et al (2016) pointed out that application of Trichoderma via seed produced greater leafing of the seedlings aerial part in P. dubium (Canafístula), differing among themselves with the later application of the biostimulator.…”

Effect of Trichoderma spp. fungus for production of seedlings in Enterolobium Schomburgkii (Benth.) Benth

“…Results of this interaction could optimize seedlings production for the most diverse interests and, as a consequence, could reduce forest resources extraction (Machado et al, 2015), once the lack of technical guidance and lack of ecological awareness on forest resources exploration in Brazil have resulted in irreparable damage. In many cases, it has caused extinction of native species with huge ecological value (Lorenzi, 2013), Besides, many of these species has importance for their wood and industrial quality, medicinal and landscape use (Arraes et al, 2012;Junges et al, 2016). In this context, the species Enterolobium schomburgkii (Benth.)…”