Quality of seeds and production seedlings Moquiniastrum polymorphum (Less.) G. Sancho

Autor: Faria, J?lio C?zar Tannure
Přispěvatelé: Melo, Lucas Amaral de, Breier, Tiago B?er, Brondani, Gilvano Ebling, Leles, Paulo S?rgio dos Santos
Jazyk: portugalština
Rok vydání: 2016
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da UFRRJ
Universidade Federal Rural do Rio de Janeiro (UFRRJ)
instacron:UFRRJ
Popis: Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2017-08-11T12:24:12Z No. of bitstreams: 1 2016 - Julio Cezar Tannure Faria.pdf: 965526 bytes, checksum: 6c25bb863a5ca78a68905e9831f1b1a5 (MD5) Made available in DSpace on 2017-08-11T12:24:12Z (GMT). No. of bitstreams: 1 2016 - Julio Cezar Tannure Faria.pdf: 965526 bytes, checksum: 6c25bb863a5ca78a68905e9831f1b1a5 (MD5) Previous issue date: 2016-02-26 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES This chapter analyzes physical and physiological properties of Moquiniastrum polymorphum seeds with mini-SAS, X-ray and seed blower equipments, and to evaluate germination at different temperatures and generating the imbibition curve of the species. The experiments were conducted at the Seed Laboratory of the Department of Forest Sciences and Seed Analysis Laboratory of the Department of Agriculture of the Federal University of Lavras, in Lavras-MG. The seeds were acquired by the company ?Sementes Cai?ara?, which were collected in arrays located in the municipality of Pen?polis-SP, in December 2014. After acquired and processed, the lot of seed was characterized by the purity tests, humidity, germination and thousand seed weight. The three main equipment used in the classification, evaluation and separation of the seeds were the equipment mini-SAS, x-ray and blower seed type General. In the X-ray test the seeds were classified according to the internal morphology displayed in the radiographic images, are classified as full seeds, empty or malformed. The seed samples identified by X-ray analysis were taken to germinate, each rank four replicates of 50 seeds. The full, empty and malformed seeds were evaluated externally by the mini-SAS equipment, through the characteristics: dominant color, area, maximum diameter, minimum diameter ratio maximum/minimum diameter and circumference. Each seed group consisted of four replications of 50 seeds. Other equipment used was the seed blower unit, which separated the seeds for the regulation of six different openings, with each of them a light fraction and one heavy. Evaluations were made by weighing the seeds remaining in the blower (heavy fraction) and the number of full seeds in this same fraction made by ray analysis X. Later germination tests were carried out consisting of four repetitions of 50 seeds. Regarding the germination study, the experiment was conducted in thermogradient table at temperatures of 15?C, 20?C, 25?C, 30?C, 35?C and 40?C with supplying constant light, each treatment consisting of four replications of 50 seeds. They were evaluated root issue, normal and abnormal seedlings, hard seeds and dead, in addition to IVG values, T50 and U75-25 to root issue, normal seedling. In determining the imbibition curve germination were tested under conditions of 30?C with constant light and 20-30?C (12h dark, 12h light). The curves were drawn from two replicates of 0,05g seed, the same being weighed in analytical balance for every three hours. After analyzing the data, it was concluded that the use together of seeds and ray blower devices are effective for evaluation and determination of the physical quality of the seeds M. polymorphum. Seed blower in regulating the opening 5 resulted in the better quality of the lot, with the largest number of full seeds. The external parameters assessed by the mini-SAS equipment were not able to qualitatively evaluate the seeds of M. polymorphum, not recommended its use to characterize them. In the germination of study at different temperatures, the best average values of the evaluated criteria resulted in 30?C temperature. In determining the curve imbibition, the seed germination phase pattern presented, and the root emission resulting in a smaller time interval at a temperature of 30?C with constant light, as evidenced from the imbibition phase III O presente cap?tulo teve por finalidade analisar as propriedades f?sicas e fisiol?gicas das sementes de Moquiniastrum polymorphum por meio dos equipamentos raios X, mini-SAS e soprador de sementes, al?m de avaliar a germina??o em diferentes temperaturas e gerar a curva de embebi??o da esp?cie. Os experimentos foram conduzidos no Laborat?rio de Sementes do Departamento de Ci?ncias Florestais e no Laborat?rio de An?lise de Sementes do Departamento de Agricultura da Universidade Federal de Lavras, na cidade de Lavras- MG. As sementes foram adquiridas pela empresa Sementes Cai?ara, as quais foram coletadas em matrizes localizadas no munic?pio de Pen?polis-SP, em dezembro de 2014. Ap?s adquirido e beneficiado, o lote de semente foi caracterizado por meio dos testes de pureza, umidade, germina??o e peso de mil sementes. Os tr?s principais equipamentos utilizados na classifica??o, avalia??o e separa??o das sementes foram os equipamento de raios X, mini- SAS e soprador de sementes tipo General. No teste de raios X as sementes foram classificadas de acordo com a morfologia interna visualizada nas imagens radiogr?ficas, sendo classificadas como sementes cheias, vazias ou mal formadas. As amostras de sementes identificadas pela an?lise de raios X foram levadas para germinar, sendo cada classifica??o composto por quatro repeti??es de 50 sementes. As sementes cheias, vazias e mal formadas foram avaliadas externamente pelo equipamento mini-SAS, por meio das caracter?sticas cor dominante, ?rea, di?metro m?ximo, di?metro m?nimo, rela??o di?metro m?ximo/m?nimo e per?metro. Cada grupo de sementes foi composto por quatro repeti??es de 50 sementes. Outro equipamento utilizado foi o aparelho de soprador de sementes, o qual separou as sementes pela regulagem de seis aberturas diferentes, apresentando em cada uma delas uma fra??o leve e outra pesada. As avalia??es foram feitas pesando as sementes que permaneceram no soprador (fra??o pesada) e sobre a quantidade de sementes cheias nesta mesma fra??o feita pela an?lises de raios X. Posteriormente foram realizados testes de germina??o compostos por quatro repeti??es de 50 sementes. Em rela??o ao estudo da germina??o, o experimento foi conduzido em mesa termogradiente nas temperaturas de 15?C, 20?C, 25?C, 30?C, 35?C e 40?C com fornecimento de luz constante, sendo cada tratamento composto por quatro repeti??es de 50 sementes. Foram avaliados emiss?o radicular, pl?ntula normal e anormal, sementes mortas e duras, al?m dos valores IVG, T50 e U75-25 para emiss?o radicular, pl?ntula normal. Na determina??o da curva de embebi??o foram testadas germina??es nas condi??es de 30?C com luz constante e 20-30?C (12h ao escuro, 12h em luz). As curvas foram elaboradas a partir de duas repeti??es de 0,05g de sementes, sendo as mesmas pesadas em balan?a anal?tica durante intervalos de tr?s horas. Ap?s a an?lise dos dados, concluiu-se que a utiliza??o em conjunto dos equipamentos de soprador de sementes e raios X s?o eficientes para avalia??o e determina??o da qualidade f?sica das sementes de M. polymorphum. O soprador de sementes na regulagem da abertura 5 resultou a melhor qualidade do lote, apresentando o maior n?mero de sementes cheias. Os par?metros externos avaliados pelo equipamento mini-SAS n?o foram capazes de avaliar qualitativamente as sementes de M. polymorphum, n?o sendo recomendado seu uso para a caracteriza??o das mesmas. No estudo da germina??o em diferentes temperaturas, os melhores valores m?dios dos crit?rios avaliados resultou na temperatura de 30?C. Na determina??o da curva de embebi??o, a germina??o das sementes apresentou padr?o trif?sico, sendo a emiss?o radicular em menor intervalo de tempo resultante na temperatura de 30?C com luz constante, evidenciado a partir da fase III de embebi??o. .
Databáze: OpenAIRE
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