Ultraviolet B radiation has been described as a potential elicitor agent of the synthesis secondary metabolites in plants. Thus, present study aimed to investigate production betalains and total flavonoids, well antioxidant activity, Alternanthera sessilis, A. brasiliana, tenella philoxeroides exposed different periods UV-B (280-315 nm). Plants these four species were for 0, 2, 4, 6, 8 hours, which amounts 10, 20, 30, 40 J cm−2 radiation, respectively. Significant increases betacyanin...

O gênero Plectranthus é considerado um dos mais ricos em óleos essenciais dentro da família Lamiaceae, compreendendo muitas espécies com propriedades medicinais. Algumas destas são conhecidas popularmente como boldo, as quais possuem semelhanças taxonômicas e diversas sinonímias, possuindo ações anti-dispépticas, analgésicas digestivas. objetivo deste estudo foi avaliar quantitativa qualitativamente os presentes nas folhas das P. amboinicus, barbatus, grandis neochilus. A extração do óleo...

This research investigates effects of salicylic acid (an abiotic elicitor) on the antioxidant activity and betacyan production from leaves Alternanthera tenella cultured in vitro was evaluated. Plants were grown a liquid MS medium vermiculite substrate. After 35 days added to medium. Content betacyanins, total phenols flavonoids non-enzymatic capacity determined A. after 0, 12, 36 48h treatment. 36h, concentration betacyanins increased. On other hand, increase treatment time caused slight...

Techniques used to induce mutations, such as ionizing radiation, are an effective tool in increasing genetic variability breeding programs of species economic interest. This study aimed evaluate the effect different doses Co60 gamma radiation on previously soaked seeds emergence and early growth seedlings two rice cultivars. To do this, (25% moisture) BRS Querência Fronteira were irradiated with zero (control), 50, 100, 150 200 Gy, then sown trays containing soil kept a greenhouse. The...

This study evaluates the chlorophyll index and fluorescence parameters of a in Alternanthera tenella grown different concentrations copper (Cu). The A. plants were hydroponically complete nutrient solution for 3 days then transferred to same containing [0.041, 0.082 (control), 0.164, 0.246, 0.328 mM]. maintained these solutions 13 days. replaced every days, evaluated at 6 after start treatment. An increase was observed mM on 13. These also affected caused reduction pool final photosystem I...

A utilização de mudas com características desejáveis, tanto genéticas quanto sanitárias, é um fator importante para o sucesso na produção mudas. micropropagação, em comparação às formas tradicionais propagação vegetativa, possibilita aumentar a e qualidade das Nesta técnica, rizogênese uma etapa crucial desenvolvimento plantas propagadas in vitro. Neste contexto, objetivou-se testar condições cultivo, tipos concentrações auxinas enraizamento vitro do porta-enxerto macieira M-9. Como...

Sweet potato (Ipomoea batatas L.) plants were cultivated in vitro Murashige and Skoog (MS) medium with 20 40 g L-1 of sucrose under two different photon flux densities (21 60 µmol m-2 s-1). Leaves developed mostly showed high variable to maximum fluorescence ratio (F V/F M) , indicating good development photosynthetic apparatus. This decreased during leaf aging, especially the on higher concentration flux. ex F M whole experiment. The effective photochemical efficiency V'/F M') was at 15th...

O objetivo deste trabalho foi identificar a relacao entre salinidade e parâmetros de cinetica fluorescencia das clorofilas em duas cultivares feijao: Expedito Carioca. As plantas foram cultivadas vasos com areia solucao nutritiva Hoagland. Aos 30 dias apos germinacao realizou-se aplicacao solucoes NaCl nas concentracoes 0, 25, 50, 75, 100, 150 200 mmol L -1 , repetidas semanalmente. 15 da do sal realizadas coletas material para analise. Avaliou-se F V /F M 0 M,  qP, qN, NPQ Φ2. relacoes v m...

This study aimed to evaluate the mechanisms of flood tolerance root system Erythrina crista-galli L. plants by measuring activity antioxidant enzymes and oxidative stress components in leaves roots. Additionally, fermentation roots was measured. The following two treatments were used: with flooded roots, which maintained at a given water level above soil surface, non-flooded plants, used as control. measurements performed 10, 20, 30, 40, 50 days after treatment. parameters evaluated each...

O objetivo deste trabalho foi caracterizar fisiologicamente a compatibilidade reprodutiva de seis cultivares ameixeira japonesa (Prunus salicina), por meio da avaliação frutificação e do crescimento tubo polínico (CTP). A percentagem determinada 40 dias após cruzamentos controlados, realizados campo, entre cultivares. grau avaliado in vivo, para determinar o CTP. pegamento frutos muito baixo todos os cruzamentos: máximo 8,1%, com autopolinização 'Reubennel'. Nos CTP apresentou variações...

Rooting and acclimatization are limiting steps in plant micropropagation, especially woody species. This study aimed to evaluate the IAA IBA effect on vitro rooting of micropropagated shoots Japanese plum (Prunus salicina Lindl.) cv. América. Shoots from 3 4 cm long were inoculated MS medium with half salt vitamin concentrations (MS/2) added (0, 0.25, 0.5, 0.75 1 mg L-1). After a 20-day period cultivation, evaluated, then transferred greenhouse, evaluated after 30 days. At end cultivation...

The aim of this study was to quantify the expression SalT, LTP-Plant, CDPK and PP1 genes, described as responsive salinity in rice genotypes, describe promoter region these genes identify possible cis-elements that may be involved induction gene under salinity. cultivars BRS Bojuru (tolerant) Agrisul (sensitive) were subjected 0, 12, 24, 36 48 h exposure salt. For analysis qRT-PCR, two detoxification/defense cell signal transduction selected. In identification cis-elements, a spanning 1.000...

Photosynthesis is one of the main plant metabolic processes affected by copper deficiency and toxicity.The objective this study was to evaluate effects different concentrations on transient chlorophyll a fluorescence modulated in sweet potatoes.Sweet potatoes were placed hydroponic system grown for six days with complete nutrient solution.The plants then transferred solutions (0.041, 0.082, 0.123 0.164 mM) nine days.The renewed every three days, evaluated at end experiment.Increased...

A manipulação da concentração dos microelementos no meio de cultura representa uma boa estratégia para aumentar a produção metabólitos secundários em tecidos. Este trabalho teve por objetivo demonstrar influência do sulfato cobre na betacianina e multiplicação plantas Alternanthera philoxeroides (erva-de-jacaré) cultivadas in vitro. Segmentos nodais, obtidos pré-estabelecidas após três subcultivos, foram inoculados MS, com diferentes concentrações CuSO4 (0; 25; 75; 125; 175; 200µM). O...

The aim of the present study was to investigate influence tyrosine on in vitro growth and production betacyanin pigment Alternanthera philoxeroides A. tenella. Nodal segments were inoculated MS medium containing different concentrations (0, 25, 50 75 μM), number sprouts buds, height, root length, fresh matter shoots roots content evaluated. In , highest (51.30 mg 100 g-1 FM) stems with addition approximately 45 μM tyrosine, while increase leaves proportional concentration, best average...

Chlorophyll fluorescence is a useful tool because it allows the interpretation of aspects related to photosynthesis. The aim this study was examine use as an indicator photosynthetic efficiency rootstock ( Malus domestica  -  cv  M9) cultivated  in vitro . explants (nodal sections with two lateral buds) were kept growth chamber 16 hours light and PF 15 µmol m -2 s plants for 55 (T1) 90 (T2) days, days transferred 150  for 2 h before determination (T3). leaves maintained dark minutes...

O presente trabalho foi realizado com objetivo de avaliar o efeito densidades fluxo luminoso na multiplicacao Gypsophila paniculata L. e sua influencia no enraizamento aclimatizacao. Utilizou-se meio MS, 30 g.L-1 sacarose, 100 mg.L-1 mioinositol 10 agar. Como explantes foram utilizados microestacas duas gemas axilares, as quais colocadas em diferentes luminosidades (15,705; 41,88 83,76 W.m-2), fotoperiodo 16 horas temperatura 23 ± 2°C. Avaliaram-se nesta fase, numero comprimento dos brotos,...

The goals of this study were to verify the influence gamma radiation (60Co) and culture medium in regeneration rate potato explants, cultivar Macaca, molecularly characterize regenerated plants using RAPD markers. Therefore, internodes leaves submitted different doses cultivated basic MS with two types cytokinins, benzylaminopurine (BAP) or zeatin (ZEA). It was observed that internodes, when BAP, presented higher compared leaves, although decreasing doses. also verified treatments ZEA, than...