Resumo -O objetivo deste estudo foi estabelecer Physalis angulata in vitro e identificar o meio de cultura mais adequado para a germinação e crescimento inicial da espécie. Nós avaliamos a germinação, o estabelecimento in vitro e o crescimento inicial de suas plântulas em diferentes meios de cultura (MS, WPM e ½MS). Primeiro, foram avaliados porcentagem, tempo médio e índice de velocidade de germinação 15 dias após a inoculação das sementes. Em seguida, foram avaliados número médio de raízes e folhas, comprimento da parte aérea e da raiz, e massa seca da parte aérea, foliar e da raiz de plântulas após 15, 30 e 45 dias da inoculação das sementes. A germinação iniciou-se quatro dias após a inoculação e não foi afetada pelos meios de cultura. Por outro lado, foram observadas diferenças significativas entre os tipos de meio de cultura para a maioria dos parâmetros de crescimento avaliados. Os meios de cultura WPM e ½MS foram mais adequados para o desenvolvimento inicial das plântulas, sendo recomendados para as demais etapas da micropropagação da espécie. Palavras-chave adicionais: Camapu, micropropagação, meio de cultura, planta medicinal.Abstract (In vitro establishment and initial growth of Physalis angulata (Solanaceae)) -The aim of this study was to establish Physalis angulata in vitro and identify the best culture medium for germination and initial growth of the species. We assessed the germination, in vitro establishment and initial growth of its seedlings in different culture media (MS, WPM and ½MS). First, we evaluated the percentage, average time and speed index of germination 15 days after seed inoculation. Then, we evaluated the average number of roots and leaves, length of shoots and roots, and dry mass of shoots, leaves and roots of seedlings 15, 30 and 45 days after seed inoculation. Germination started four days after inoculation and the choice of culture media did not affect germination. However, significant differences among culture media were found for most growth parameters evaluated. The culture media WPM and ½MS provide better initial growth of seedlings and these are recommended for the other stages of micropropagation of this species.
Eplingiella fruticosa (Salzm. ex Benth.) Harley & J.F.B. Pastore, also known as “alecrim de vaqueiroâ€� or “cowboy rosemaryâ€�, is a woody, perennial, and aromatic shrub that growsin the states of northeast Brazil, with the exception of Alagoas, Maranhão, and PiauÃ. The plant is widely used in this region and has analgesic, vasodilator, anti-inflammatory, and larvicidal properties.The objective of this study was to evaluate the effect of different substrates and indolebutyric acid (IBA) on cuttings of E. fruticosa for identifying effective practices for the vegetative propagation of this species. Apical cuttings with a standardized length of 10cm and two pairs of leaves were harvested from mother plants in the vegetative stage. Two experiments were conducted: the first experiment tested the effect of three substrates (commercial, commercial + vermiculite, and commercial + vermiculite + humus) and the second experiment evaluated five concentrations of IBA (0.0, 1.0, 2.0, 3.0, and 4.0gL−1) and three growth periods (30, 45, and 60 days). The experimental design was randomized blocks with four replications. The analyzed variables were survival of cuttings, number of rooted cuttings, root length per cutting (RLC), number of buds per cutting (NBC), leaf dry mass (LDM), root dry mass (RDM), and total dry mass (TDM). In thefirst experiment,there were significant differences in RLC, NBC, LDM,RDM, and TDM, with a better growth using the commercial substrate. In the second experiment, there was no interaction between the evaluated parameters. However, there was a positive associated effect of IBA addition and the growth period on RLC, NBC, LDM, and RDM. The highest predicted value was attained for a concentration of 1.5g L−1IBA and a growth period of 60 days, for the above-mentioned variables.
O gerânio (Pelargonium graveolens) é uma erva aromática e seu óleo essencial é comumente utilizado na constituição de fármacos e cosméticos no mundo. A planta adapta-se bem às condições climáticas do nordeste brasileiro, mas são escassos os dados sobre seu rendimento quantitativo e qualitativo. O objetivo do trabalho foi avaliar a influência de espaçamento de plantas e intervalos de colheita em gerânio na produção de biomassa e de óleo essencial. Foram testados três espaçamentos de plantio (50x50, 50x60 e 50x80 cm) e três intervalos de colheita (8, 12 e 16 semanas). Os maiores valores totais de massa fresca e seca de folhas e caules (2679,04 g m-2; 424,62 g m-2; 1035,08 g m-2; 136,85 g m-2, respectivamente) e rendimento de óleo essencial (7,56 mL m-2), que são características de interesse direto para o mercado, foram obtidos em intervalo de colheita de oito semanas e no espaçamento de 50x50 cm. Nas demais variáveis analisadas, houve pouca diferenciação entre os tratamentos, contudo, períodos longos de colheita são menos produtivos, pois houve queda nos valores de todas as variáveis nas ultimas colheitas de cada intervalo. Assim, melhores resultados de quantidade e qualidade para o gerânio foram obtidos com intervalo de 8 semanas e no espaçamento 50x50 cm.
Sweet-scented geranium (Pelargonium graveolens L'Hér), a plant belonging to the Geraniaceae family, has medicinal and aromatic properties and is widely used in the cosmetic, soap, perfume, aromatherapy, and food industries. The aim of this study was to evaluate the influence of fertilization and the use of different colors of plastic mulch on sweet-scented geranium biomass and essential oil. Three colors of plastic mulch (black, white, and silver-colored) and a control without plastic mulch were assessed along with three fertilizers (20,000 L·ha−1 of cattle manure; 1,000 kg·ha−1 of NPK 3-12-6; and 20,000 L·ha−1 of cattle manure + 1,000 kg·ha−1 of NPK 3-12-6 fertilizer) and a control without fertilizer. The absence of a soil cover negatively influenced the agronomical variables, while coverage with plastic mulch was associated with increased biomass. The use of fertilizer had no effect on the evaluated agronomic variables. When cattle manure and NPK 3-12-6 were used together, combined with white or black plastic mulch, the highest yields of essential oil were obtained. For the silver-colored plastic mulch, higher amounts of essential oil (6,9-guaiadien) were obtained with mineral fertilizer.
Volatile organic compounds (VOCs) from leaves of geranium (Pelargonium graveolens L’ Herit) were extracted by dynamic headspace using Porapak Q (HSD-P) as adsorbent and peat, a novel adsorbent in the extraction of plant volatiles, analyzed by gas chromatography–mass spectrometry (GC/MS) and gas chromatography–flame ionization (GC/FID), and the results were compared with those obtained by hydrodistillation (HD). The yield volatiles changed with the extraction method. HD was more efficient for extracting linalool (11.19%) and citronellyl formate (9.41%). Citronellol (28.06%), geraniol (38.26%) and 6,9-guaiadiene (9.55%) and geranyl tiglate (8.21%) were the major components identified by dynamic headspace using peat (HSD-T), while citronellol (16.88%), geraniol (13.63%), 6,9-guaiadiene (16.98%) and citronellyl formate (6.95%) were identified by dynamic headspace using Porapak Q (HSD-P). Furthermore, this work showed, for the first time, that in natura peat is useful to extract VOCs from leaves of geranium.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.