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Valorização de resíduos vegetais no contexto da economia circular: Endófitos de Cannabis sativa L. com aplicação bioestimulante em Solanum lycopersicum L.
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Abstract(s)
A presente dissertação teve como objetivo a valorização de resíduos vegetais da
indústria de Cannabis medicinal, identificando bactérias endófitas com potencial
bioestimulante em Solanum lycopersicum L. Foram isoladas doze bactérias a partir de
resíduos de Cannabis sativa L. e avaliadas quanto à produção de biofilme, síntese de
auxinas e fixação de azoto. Destacaram-se os seguintes géneros: B4 (Pseudomonas sp.),
B8 (Stenotrophomonas sp.) e B16 (Bacillus sp.). O isolado B16 evidenciou maior produção
de biofilme e auxinas, enquanto B8 se destacou na fixação de azoto. Nos ensaios em
estufa o isolado B4 revelou melhor desempenho na promoção do crescimento de
tomateiros, ao contrário do isolado B8, associado a uma menor produção de frutos. O
isolado B4 apresentou melhor desempenho global, constituíndo o isolado mais
promissor. Conclui-se assim que os resíduos de Cannabis sativa são fonte viável de
microrganismos endófitos com aplicação bioestimulante, podendo contribuir para
práticas agrícolas mais sustentáveis.
This dissertation aimed to valorise plant residues from the medicinal Cannabis industry by identifying endophytic bacteria with biostimulant potential in Solanum lycopersicum L. Twelve bacterial isolates were obtained from Cannabis sativa L. residues and evaluated for their ability to produce biofilm, synthesize auxins, and fix nitrogen. The following genera stood out: B4 (Pseudomonas sp.), B8 (Stenotrophomonas sp.), and B16 (Bacillus sp.). Isolate B16 exhibited the highest biofilm formation and auxin synthesis, while B8 showed the greatest nitrogen-fixing capacity. Greenhouse trials revealed that isolate B4 promoted the growth of tomato plants, in contrast to isolate B8, which produced a lower fruit production. Isolate B4 displayed the most promising overall performance. It is concluded that Cannabis sativa residues are viable sources of endophytic microorganisms with biostimulant application, contributing to more sustainable agricultural practices.
This dissertation aimed to valorise plant residues from the medicinal Cannabis industry by identifying endophytic bacteria with biostimulant potential in Solanum lycopersicum L. Twelve bacterial isolates were obtained from Cannabis sativa L. residues and evaluated for their ability to produce biofilm, synthesize auxins, and fix nitrogen. The following genera stood out: B4 (Pseudomonas sp.), B8 (Stenotrophomonas sp.), and B16 (Bacillus sp.). Isolate B16 exhibited the highest biofilm formation and auxin synthesis, while B8 showed the greatest nitrogen-fixing capacity. Greenhouse trials revealed that isolate B4 promoted the growth of tomato plants, in contrast to isolate B8, which produced a lower fruit production. Isolate B4 displayed the most promising overall performance. It is concluded that Cannabis sativa residues are viable sources of endophytic microorganisms with biostimulant application, contributing to more sustainable agricultural practices.
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Keywords
biotecnologia Microbioma vegetal Solanum lycopersicum L. Bactérias PGP Plant microbiome biotechnology PGP bacteria