Efecto de dos fertilizantes sobre el crecimiento de Vanilla planifolia Jacks. ex Andrews (Orchidaceae) durante la aclimatación

Introduction. Vanilla planifolia Jacks. ex Andrews, an endangered orchid native to Mexico, is cultivated worldwide for its valuable vanilla bean. Despite advances in in vitro propagation, optimizing cultivation protocols remains a challenge. Objective. This study evaluated the effects of two liquid and controlled-release fertilizer doses on the acclimatization of V. planifolia plantlets in a greenhouse. Materials and Methods.Plantlets from a germplasm bank were pre-acclimatized in perlite and then transferred to pots for acclimatization. Treatments included a liquid fertilizer (7-3-7.5 with naphthaleneacetic acid) at doses of 2.5 and 5 ml.L-1, and a controlled-release fertilizer (Plantacote® 6M 14-9-15+Mg+micros) at doses of 3 and 6 g/dm³ of substrate. Results and Discussion. Statistical analysis revealed significant differences between treatments and the control. However, fertilizers did not enhance plant growth parameters compared to the control. The 5 ml.L-1 liquid fertilizer showed the best performance among treatments. Conclusion. Results indicate that, under these conditions, the applied fertilizers, at recommended or doubled doses, did not provide additional benefits for the growth and development of V. planifolia.Introducción. La Vanilla planifolia Jacks. ex Andrews es una orquídea originaria de México en peligro de extinción, que se cultiva en varios países tropicales y subtropicales con la finalidad de comercializar la vainillina, esencia que es utilizada en la industria alimenticia y cosmética. Aunque la biotecnología in vitro ha facilitado su propagación, aún existen desafíos para obtener mejores protocolos de esta técnica y optimizar los cultivos. Objetivos. Evaluar el efecto de dos dosis de un fertilizante líquido y otro de liberación controlada durante la aclimatación en invernáculo de vitroplantas de V. planifolia. Materiales y métodos. Se emplearon plantas provenientes del banco de germoplasma de la Facultad de Ciencias Forestales (Universidad Nacional de Misiones). Las cuales fueron sometidas a una fase de pre- climatación en perlita, seguida de una etapa de aclimatación en macetas. Durante esta última fase, se establecieron los tratamientos con un fertilizante líquido 7-3-7,5 (con ácido naftalenacético) en la dosis de 2,5 y 5 ml.L-1, y un fertilizante de liberación controlada (Plantacote® 6M 14-9-15+Mg+micros) en la dosis de 3 y 6 g/ dm³ de sustrato. Resultados y Discusión. El análisis estadístico mostró diferencias significativas entre los tratamientos y el testigo. Sin embargo, los fertilizantes no mejoraron los parámetros estudiados en las plantas en relación con el testigo. El fertilizante líquido en la dosis 5 ml.L-1 mostró el mejor desempeño entre los tratamientos. Conclusiones. Los resultados obtenidos indicaron que, en este caso, los fertilizantes aplicados en los marbetes a la dosis recomendada o duplicada no proporcionaron un beneficio adicional en términos de crecimiento y desarrollo de la V. planifolia

Resumos em andamento - Saúde Coletiva

Resumos em andamento - Saúde Coletiv

Resumos em andamento - Saúde Coletiva

Resumos em andamento - Saúde Coletiv

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora

Núcleos de Ensino da Unesp: artigos 2008

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq