Examinando por Materia "Seedlings"

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Dataset of de novo assembly and functional annotation of the transcriptome during germination and initial growth of seedlings of Myrciaria Dubia “camu-camu”
(Elsevier, 2020-06-11) Castro Gómez, Juan Carlos; Maddox, J. Dylan; Rodríguez, Hicler N.; Castro, Carlos G.; Imán Correa, Sixto Alfredo; Cobos Ruiz, Marianela; Paredes, Jae D.; Marapara del Aguila, Jorge Luis; Braga, Janeth; Adrianzén Julca, Pedro M.
Myrciaria dubia “camu-camu” is a native shrub of the Amazon that is commonly found in areas that are flooded for three to four months during the annual hydrological cycle. This plant species is exceptional for its capacity to biosynthesize and accumulate important quantities of a variety of health-promoting phytochemicals, especially vitamin C [1], yet few genomic resources are available [2]. Here we provide the dataset of a de novo assembly and functional annotation of the transcriptome from a pool of samples obtained from seeds during the germination process and seedlings during the initial growth (until one month after germination). Total RNA/mRNA was purified from different types of plant materials (i.e., imbibited seeds, germinated seeds, and seedlings of one, two, three, and four weeks old), pooled in equimolar ratio to generate the cDNA library and RNA paired-end sequencing was conducted on an Illumina HiSeq™2500 platform. The transcriptome was de novo assembled using Trinity v2.9.1 and SuperTranscripts v2.9.1. A total of 21,161 transcripts were assembled ranging in size from 500 to 10,001 bp with a N50 value of 1,485 bp. Completeness of the assembly dataset was assessed using the Benchmarking Universal Single-Copy Orthologs (BUSCO) software v2/v3. Finally, the assembled transcripts were functionally annotated using TransDecoder v3.0.1 and the web-based platforms Kyoto Encyclopedia of Genes and Genomes (KEGG) Automatic Annotation Server (KAAS), and FunctionAnnotator.
Determinación de la DL50 de Metanosulfonato de Etilo (EMS) para la inducción de cambios morfológicos y fisiológicos en plántulas de Plukenetia volubilis
(Universidad Nacional de San Martín, 2022-01-20) Corazon Guivin, Mike; Arévalo Rojas, Manuel; Acosta Córdoba, Ronny; Valverde Iparraguirre, Jorge; Ruiz Sánchez, María; Cerna Mendoza, Agustín; Guerrero Abad, Juan Carlos
El uso de mutágenos químicos es una herramienta muy utilizada para la generación de nuevas variantes genéticas en diversos cultivos agrícolas. Se evaluó el uso Ethyl Methanesulphonate (EMS) en semillas de Plukenetia volubilis L. para determinar la concentración óptima de EMS que redujera la germinación y/o emergencia de las semillas hasta un 50.0%, y evaluar las alteraciones morfológicas y fisiológicas en plántulas de P. volubilis durante la primera generación. Se empleó un DCA simple con diferentes dosis (0.0%, 0.5%, 1.0%, 1.5%, 2.0% y 3.0%) de EMS en un solo tiempo de exposición (30 hrs.), más un control absoluto (semillas sin tratamiento), para evaluar la sensibilidad mutagénica de P. volubilis L.., considerando parámetros como porcentaje de emergencia, altura de planta, pérdida de dominancia apical, clorosis y deformación de las hojas. Los resultados mostraron que la dosis de 3.0% de EMS con 30 hrs. de exposición, redujo hasta un 50.0% la emergencia de plántulas, valor considerado como la dosis letal media (DL50) para P. volubilis. Así mismo, se evidenciaron alteraciones fenotípicas como deformación de hojas, clorosis, disminución de la altura y pérdida de dominancia apical con el incremento de dosis de EMS. Estos resultados demuestran el potencial del EMS para ser utilizados en semillas de sacha inchi con el objetivo de generar nuevas variantes genética de esta especie.
Effect of co-inoculation with growth-promoting bacteria and arbuscular Mycorrhizae on growth of Persea americana seedlings infected with Phytophthora cinnamomi
(MDPI, 2024-04-02) Solórzano Acosta, Richard Andi; Toro, Marcia; Zúñiga Dávila, Doris
Avocado is one of the most in-demand fruits worldwide and the trend towards its sustainable production, regulated by international standards, is increasing. One of the most economically important diseases is root rot, caused by Phythopthora cinnamomi. Regarding this problem, antagonistic microorganism use is an interesting alternative due to their phytopathogen control efficiency. Therefore, the interaction of arbuscular mycorrhizal fungi of the phylum Glomeromycota, native to the Peruvian coast (GWI) and jungle (GFI), and avocado rhizospheric bacteria, Bacillus subtilis and Pseudomonas putida, was evaluated in terms of their biocontrol capacity against P. cinnamomi in the “Zutano” variety of avocado plants. The results showed that the GWI and Bacillus subtilis combination increased the root exploration surface by 466.36%. P. putida increased aerial biomass by 360.44% and B. subtilis increased root biomass by 433.85%. Likewise, P. putida rhizobacteria showed the highest nitrogen (24.60 mg ∙ g−1 DM) and sulfur (2.60 mg ∙ g−1 DM) concentrations at a foliar level. The combination of GWI and Bacillus subtilis was the treatment that presented the highest calcium (16.00 mg ∙ g−1 DM) and magnesium (8.80 mg ∙ g−1 DM) concentrations. The microorganisms’ multifunctionality reduced disease severity by 85 to 90% due to the interaction between mycorrhizae and rhizobacteria. In conclusion, the use of growth promoting microorganisms that are antagonistic to P. cinnamomi represents a potential strategy for sustainable management of avocado cultivation.
Massive production of Hemileia vastatrix uredospores for infection of Coffea arabica seedlings
(Universidad Nacional de Trujillo, 2023-07-10) Hernández Amasifuen, Angel David; Rivadeneyra Chisquipama, Lenin; Padilla Dominguez, Amner; Paredes Espinosa, Richard; Guerrero Abad, Juan Carlos; Torres Flores, Elías; Peláez Rivera, Jorge Luis; Carvajal Vallejos, Fernando Marcelo; Gutiérrez Reynoso, Dina Lida; Corazon Guivin, Mike Anderson
Coffee leaf rust (Hemileia vastatrix) is the most important disease in coffee crops around the world. Currently, there is limited knowledge about mass production methodologies and ex-situ infection of H. vastatrix that lead to the development of different health characterization studies of Coffea or disease phenotyping. In this context, the aim of this research was to develop a simple protocol for the mass production of coffee rust uredospores under controlled conditions and to determine their infection in coffee seedlings. Uredospores of H. vastatrix were collected from infected plants in the “Chontal” coffee-growing area in San Martín, Peru. The viability of uredospore germination was evaluated, and a uredospores suspension (2 x 105 uredospores/mL) was prepared to inoculate coffee seedlings. Incidence and sporulation rates were evaluated after 43 days of inoculation. During the multiplication process of H. vastatrix uredospores, using controlled conditions (23±1 °C, ≈ 80% relative humidity and photoperiod of 16 hours of light) under an innovative system, the first symptoms of chlorosis were observed on coffee leaves 20 days after inoculation. Our findings show a 100% incidence of inoculated coffee plants with an average of 54 mg of H. vastatrix uredospores per plant and a 1.38 x 10-1 mg/cm2 sporulation rate. Finally, here we report a protocol that allows mass multiplication of H. vastatrix uredospores under controlled conditions, that would be useful in any time for coffee leaf rust bioassays.