Caracterização biométrica e respostas fisiológicas de diásporos de murucizeiro a tratamentos para superação da dormência

Carvalho, J. E. U. de; Nascimento, W. M. O. do

doi:10.1590/s0100-29452013000300006

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…It has a fleshy fruit, drupoide type, with a round shape or oblong, from ovarian tricarpellate, with each carpel containing an egg. It is consumed as fresh fruit or used in the preparation of soft drink, ice cream, sweet paste, jam, liqueur and even in savory dishes such as meat stuffing or soups (Carvalho and Nascimento, 2013). The murucizeiro propagation unit is pyrene (core), which contains one to three seeds located in the walls of isolated locules endocarp (Carvalho and Nascimento, 2008).…”

Section: Introductionmentioning

confidence: 99%

Gas exchange and carbon metabolism in young plants of muruci (Byrsonima crassifolia L.) submitted to water deficit

Nogueira¹,

Oliveira²,

Cardoso³

et al. 2016

Afr. J. Agric. Res.

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The Byrsonima genus covers various fruit species known in the Brazilian Amazon as murucizeiro, which is considered as a species with good nutritional quality and features in its composition a variety of volatile compounds. The adaptation of plants to water stress is a complex physiological and biochemical phenomenon. Depending on the intensity and duration of stress, changes ranges from a rapid change in the flow of ions to improve the osmotic pressure, reduction of gas exchange, stabilization of cell structures by osmotic protection to a more drastic change in plant growth pattern. The aim of this work was to study gas exchange and carbon metabolism in young plants of muruci (Byrsonima crassifólia L.) submitted for water suspension. The experimental design was completely randomized with two water conditions: control and drought, with 14 repetitions, totaling 28 experimental units. The parameters analyzed were relative water content, transpiration, stomatal conductance, photosynthetic pigments, concentrations of starch, total soluble carbohydrates and sucrose. The suspension of irrigation for 25 days provided significant differences in all parameters, promoting decreases in the metabolic pathways of plants and reducing the relative water content by 26.92%, transpiration 90%, stomatal conductance 94.79%, photosynthetic pigments (Clrofila (42.1%), Chlorophyll b (50%), Carotenoids (45.1%) and overall (33.3%)) and starch in leaves and roots (73.43 and 63.63%), but increase in the control plants with the total soluble carbohydrates at 63, 87 and 39.5% and sucrose content as 64.73 and 43.99% in the leaves and roots. Therefore, these changes indicated that these plants are susceptible to soils with low water availability.

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Section: Introductionmentioning

confidence: 99%

Gas exchange and carbon metabolism in young plants of muruci (Byrsonima crassifolia L.) submitted to water deficit

Nogueira¹,

Oliveira²,

Cardoso³

et al. 2016

Afr. J. Agric. Res.

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“…is considered a semi-domesticated shrub species native of the Amazon and widely distributed in tropical America (Cavalcante, 2010). It is the most important fruit crop of the genus Byrsonima and the most cultivated, since it produces fleshy fruits used in cooking, as well as for making sweets and liqueurs (Cavalcante, 2010;Carvalho and Nascimento, 2013). This species is rich in polyphenols and flavonoid compounds that provide antioxidants.…”

Section: Introductionmentioning

confidence: 99%

“…The Embrapa Eastern Amazon has assembled an active germplasm bank (BAG) of nanche germplasms and identified promising materials for breeding purposes (Carvalho and Nascimento, 2013). Further experimental evaluations of this germplasm may allow for recommendations of appropriate and stable cultivars for producing regions.…”

Section: Introductionmentioning

confidence: 99%

Genetic variability analysis of Byrsonima crassifolia germplasm collected in Pará State using ISSR markers

Rodrigues¹,

Moura²,

Ramos³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Native of the Amazon, the nanche (Byrsonima crassifolia) is a fruit cultivated by family farmers and used in cooking; as such, it represents an opportunity for regional agribusiness. The Embrapa Eastern Amazon set up an active germplasm bank (BAG) consisting of 22 accessions sampled in 11 municipalities of Pará State. Due to its economic potential, there is an interest to advance the genetic breeding program of this species. The aim of this study was to characterize the BAG nanche collection using inter-simple sequence repeat (ISSR) markers. Accessions were genotyped using 23 preselected ISSR primers resulting in 109 amplified polymorphic and 51 monomorphic bands. With eight polymorphic bands each, the most polymorphic primers were UBC 809 and UBC 848. An unweighted pair-group method with arithmetic average cluster analysis based on Jaccard's coefficient indicated that the individuals clustered into two distinct groups. Accessions Igarapé Açu-2 and Augusto Corrêa-Pl 1 were most similar. The genetic dissimilarity values ranged from 0.10 to 0.59. We conclude that the ISSR markers were efficient in detecting polymorphisms in the nanche accessions, and that it is possible to infer the genetic variability among accessions of the collection. This demonstrate the importance of using molecular markers in poorly studied species and the advantages that this information can bring to the genetic improvement of such species.

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PHYSIOLOGICAL POTENTIAL AND CONSERVATION OF MURUCI (Byrsonima crassifolia) SEEDS

et al. 2017

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-The goal of the present study is to assess the physiological potential of Byrsonima crassifolia seeds and analyze the procedures of the germination and tetrazolium tests, as well as the conservation of such seeds by testing different combinations of packaging and environment. The experiment used pyrenes of the clone Açu, collected from mother plants in the germplasm collection of muruci plants of Embrapa Amazonia Oriental, in Belém, Brazil. Different temperatures were tested in the germination test (25, 30, 35 and 20 -30 °C). The best methodology and assessment dates were determined for the test, and the seedlings of the species were characterized. Viability was assessed with the tetrazolium test, with combinations of hydration methods (by immersion and between paper towels), staining periods (3 and 4 h) and concentrations of tetrazolium solution (0.5, 0.7 and 1.0%). Storage of muruci pyrenes was evaluated at three, six and twelve months, in polyethylene and Kraft paper bags, under dry chamber and refrigerator conditions. The study used a randomized block design with four replicates. The data underwent analysis of variance. In conclusion, the physiological potential of seeds of B. crassifolia can be assessed by the germination test conducted in sand, with alternating temperatures of 20-30 °C, or with the use of the tetrazolium test (with staining for three hours in the tetrazolium solution at 1.0%) as a rapid assessment of viability. Muruci pyrenes can be kept in polythene or paper Kraft bags for up to 12 months, in a dry chamber at 16 °C and with relative air humidity of 50 to 60%. Index terms: Pyrene, germination, tetrazolium test, storage. POTENCIAL FISIOLÓGICO E CONSERVAÇÃO DE SEMENTES DE MURUCI (Byrsonima crassifolia)RESUMO -O objetivo deste trabalho foi avaliar o potencial fisiológico de sementes de Byrsonima crassifolia e estudar procedimentos dos testes de germinação e de tetrazólio, bem como sua conservação, testando combinações de embalagem e ambiente. Foram utilizados pirênios do clone Açu, coletados de plantas matrizes da Coleção de Germoplasma de murucizeiro da Embrapa Amazônia Oriental, em Belém -PA, Brasil. No estudo de germinação foram testadas diferentes temperaturas (25, 30, 35 e 20 -30 °C), procurando-se definir a melhor metodologia e as datas de avaliação do teste, bem como a caracterização das plântulas. Na avaliação da viabilidade pelo teste de tetrazólio, testou-se combinações de formas de hidratação (por imersão e entre papel), períodos de coloração (3 e 4 h) e concentrações da solução de tetrazólio (0,5; 0,7 e 1,0%). O armazenamento dos pirênios de muruci foi avaliado aos três, seis e 12 meses, em embalagens de polietileno e papel tipo Kraft, sob condições de câmara seca e refrigerador. O delineamento experimental foi inteiramente casualizado, com quatro repetições e os dados submetidos à análise de variância. Concluise que o potencial fisiológico das sementes de B. crassifolia pode ser avaliado pelo teste de germinação conduzido entre areia, com temperatura alternada de 20-30...

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Caracterização biométrica e respostas fisiológicas de diásporos de murucizeiro a tratamentos para superação da dormência

Cited by 4 publications

References 8 publications

Gas exchange and carbon metabolism in young plants of muruci (Byrsonima crassifolia L.) submitted to water deficit

Gas exchange and carbon metabolism in young plants of muruci (Byrsonima crassifolia L.) submitted to water deficit

Genetic variability analysis of Byrsonima crassifolia germplasm collected in Pará State using ISSR markers

PHYSIOLOGICAL POTENTIAL AND CONSERVATION OF MURUCI (Byrsonima crassifolia) SEEDS

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