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Physiological and biochemical changes during desiccation tolerance loss in mill...
Fernandes, Joana Souza; Guimarães, Renato Mendes; Faria, Jose Marcio Rocha; Pereira, Diego de Sousa; Coelho, Stefania Vilas BoasThe aim of this study was to evaluate the physiological and biochemical changes related to desiccation tolerance loss in millet seeds. The studied points of the germination process were determined according to the seed imbibition curve of the millet hybrid ADRF6010: control (0h), 3h of imbibition, 1 and 3 mm radicle. The seeds were dried on silica gel for 72h at 20°C, followed by pre-humidification at 25°C for ...
Fusarium verticillioides inoculum potential and its relation with the physiolog...
Fantazzini, Tatiana Botelho; Guimarães, Renato Mendes; Clemente, Aline da Consolação Sampaio; Carvalho, Everson Reis; Machado, José da CruzThe pathogenic fungi may be associated with the seeds during development, harvest and storage, and it can be disseminated through them. This work evaluated the seeds performance of three hybrid corn cultivars, BM 840 PRO, BM 810 and BM 207, submitted to different inoculum potentials of Fusarium verticillioides. Seeds were uniformly distributed over the medium fungal colony developed on PDA (potato dextrose agar...
Aplicação do teste de raios x no estudo da morfologia interna e da qualidade fi...
Melo, Paulo Régis Bandeira de [UNESP]; Oliveira, João Almir; Carvalho, Maria Laene Moreira de; Guimarães, Renato Mendes; Carvalho, Bruno de OliveiraSubmitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:53:34Z No. of bitstreams: 1 S0101-31222009000200017.pdf: 2018608 bytes, checksum: af7b8c84e1e701b2091b979aeb37c0ed (MD5); Made available in DSpace on 2013-08-22T18:53:34Z (GMT). No. of bitstreams: 1 S0101-31222009000200017.pdf: 2018608 bytes, checksum: af7b8c84e1e701b2091b979aeb37c0ed (MD5) Previous issue date: 2009-01-01; Made availa...
Quality of coffee seeds after retardment of post-harvest processing
Caixeta, Ivan Franco; Guimarães, Renato Mendes; Malta, Marcelo RibeiroThe routine procedure of coffee seed production is based on the pulping of fruits immediately after the harvest of the cherry fruit to prevent fermentation and possible damage to the seed quality. However there are arguments of testers of natural special coffees (with husk during the drying up), that this procedure leads to full-bodied, sweet beverage, withmoderate acidity. The present study was conducted with ...
PLÂNTULAS DE CAFÉ ORIGINADAS DE SEMENTES ARMAZENADAS E SUBMETIDAS AO CONDICIONA...
Carvalho, Carlos Alberto Machado; Almeida, Tanismare Tatiana de; Guimarães, Renato MendesAs sementes de café (Coffea arabica L.) perdem a viabilidade e o vigor com poucos meses de armazenamento, o que restringe a época de semeadura e a produção de mudas. No entanto uma alternativa seria o priming ou condicionamento fisiológico, que é uma técnica que promove melhoria na qualidade das sementes, como rapidez e uniformidade na emergência de plântulas. Assim, objetivou-se avaliar a emergência de plântul...
Luz e KNO3 na germinação de sementes de Ageratum conyzoides L. sob temperaturas...
Ikeda, Fernanda Satie; Carmona, Ricardo; Mitja, Danielle; Guimarães, Renato MendesAgeratum conyzoides é uma planta daninha de origem tropical que apresenta presença expressiva nos bancos de sementes em que ocorre. Considerando-se a importância de conhecer os fatores que afetam a germinação de sementes no manejo das espécies de plantas daninhas, avaliou-se o efeito de luz e KNO3 sob temperatura constante e alternada na germinação de sementes de A. conyzoides. Quatro subamostras de 75 sementes...
Influence of light and gibberellin on the germination velocity of coffee seeds ...
Resende, Maria de Lourdes; Silva, Tanismare Tatiana de Almeida; Guimarães, Renato Mendes; Silva, Edvaldo Aparecido Amaral daThere are various factors that interfere with seed germination. In this research the effect of light, gibberellins and paclobutrazol in coffee seed germination were evaluated. Seeds of coffee (Coffea arabica L.) from cultivar Rubi harvested at the developmental stage known as cherry were dried until 12% of water content. The first trial was performed in factorial design (2x2), the condtions being two (light and...
Pre-imbibition: Effects in the germination, seedling growth and content of caff...
Rosa, Sttela Dellyzete Veiga Franco da; Mazzafera, Paulo; Guimarães, Renato Mendes; Veiga, André Delly; Veiga, Adriano DellyCoffee seeds (Coffea arabica L.) contains from 1% to 2% of caffeine, a highly water-soluble alkaloid, which inhibits germination of several species. This work was undertaken to evaluate the effects of treatments of pre-imbibition and running water washing on physiological performance and caffeine content of coffee seeds, with the following treatments: pre-imbibition in water under stirring for 6, 12 and 24 hour...