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Search Results: 1 - 10 of 50661 matches for " Marlove;Silva "
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Influência da assepsia e do substrato na qualidade de sementes e mudas de espécies florestais
Muniz, Marlove Fátima Bri?o;Silva, Lorenzo Melo e;Blume, Elena;
Revista Brasileira de Sementes , 2007, DOI: 10.1590/S0101-31222007000100019
Abstract: the objective of this study was to evaluate the effect of seed treatment and substrate composition on the seed and seedling quality of tree species. the species were "acácia" (cassia multijuga), "angico" (parapiptadenea rigida), "canafístula" (pelptophorum dubium), "maricá" (mimosa bimucronata) and "timbaúva" (entereolobium contortisiliquum). the seeds were treated with a solution of sodium hypochlorite at 1%, for 5 minutes and another seed lot did not receive any type of pre-treatment. for seedling production, two substrate compositions were used: substrate a, consisting of 50% soil and 50% organic substance and substrate b, consisting of 35% pine debris and degraded organic substance, 35% soil and 30% burnt rice husk. seed health, germination, seedling emergence ate seven and 28 days, cool weight, dry weight, length and leaf number were assessed. the main fungi associated with the seeds was aspergillus spp., penicillium spp. and alternaria spp., with higher incidences in the non pre-treated seeds. in the evaluation of the seedling quality, substrate a was shown to the better than substrate b, producing seedlings with high biological performance. the seed asepsis showed positive effect on the seed sanitary quality and in the initial phase of the seedling development. in the final phase, the effect of the substrate was preponderant, where the substrate composition made a difference.
Fungos antagonistas a Sclerotinia sclerotiorum em pepineiro cultivado em estufa
Ethur, Luciana Z.;Blume, Elena;Muniz, Marlove;Silva, Antonio Carlos F. da;Stefanelo, Daniela R.;Rocha, Edileusa K. da;
Fitopatologia Brasileira , 2005, DOI: 10.1590/S0100-41582005000200004
Abstract: white mold caused by sclerotinia sclerotiorum may severely damage vegetables grown in greenhouses. to develop a biological control program for this pathogen proper antagonists are needed. this work aimed to select efficient fungi antagonists for controlling s. sclerotiorum on cucumber (cucumis sativus) grown in greenhouses, and to evaluate the effect of the antagonist on the growth of the vegetable. an isolate of s. sclerotiorum obtained from cucumber and 112 fungi isolates belonging to four genera were used: trichoderma, fusarium, penicillium, and aspergillus. for the in vitro experiment, the cellophane method was used and eight trichoderma virens isolates were selected that had inhibited the pathogen growth by 94 to 100%. greenhouse experiments used sterilized and non-sterilized substrate in plastic cups and non-sterilized substrate in plastic bags. the substrate was inoculated with s. sclerotiorum and the eight isolates of t. virens were used as antagonists. all eight isolates controlled damping-off of plants caused by s. sclerotiorum, but the effect on cucumber growth varied according to the isolate and the substrate treatment.
Aspectos relacionados à qualidade de sementes de coentro
Pereira, Roseane S.;Muniz, Marlove F. B.;Nascimento, Warley M.;
Horticultura Brasileira , 2005, DOI: 10.1590/S0102-05362005000300002
Abstract: coriander is a vegetable crop with large consumption in brazil, of high social and economic importance. problems related to low seed vigor and cultivation are reported in this crop. in the present study, eleven seed lots of coriander cultivars 'verd?o', 'americano gigante', 'tapacurá', 'tabocas', 'palmeira' and 'asteca' were used to determine the purity, germination, vigor and pathological seed quality. in another study, effects on seed germination of the same commercial cultivars and 'verd?o hv' were evaluated at temperatures of 15; 20; 25; 30 and 35oc. little variation in the germination was observed among seed lots. all lots exhibited germination above the national standard, and lot 1 presented purity below the standard for seed trading. purity and germination of coriander seeds in brazil is generally, satisfactory. regarding to pathological seed quality, some important fungi of coriander crop were detected, as alternaria alternata and alternaria radicina. in one lot was detected alternaria dauci. effects of temperature, cultivar and an interaction effect between cultivar and temperature on seed germination was observed. temperatures between 15 and 25oc were favorable to germination whereas higher temperatures reduced the germination. the cultivars 'verd?o hv' and 'palmeira' germinated at 30oc. at 35oc no germination was observed in all tested cultivars, possibly due to thermoinhibition, since the seeds germinated when transferred to 20oc.
Qualidade sanitária e fisiológica de sementes de abóbora variedade Menina Brasileira
Casaroli, Derblai;Garcia, Danton C.;Muniz, Marlove F. B.;Menezes, Nilson L. de;
Fitopatologia Brasileira , 2006, DOI: 10.1590/S0100-41582006000200006
Abstract: the objective of this work was to evaluate and correlate the health and physiological qualities of squash seeds of the variety menina brasileira (cucurbita moschata.). we evaluated two squash seed lots produced in the agroecological system and four seed lots produced in the conventional system with and without chemical treatment. the seed lots were submitted to health tests with freezing, germination and vigour, following blotter test methodology (first count, germination speed, accelerated ageing and seedling emergence tests). the results from the health and physiological tests indicated a difference between seed lots from different origins: the agroecological lots showed the highest incidence of fungi and the conventional lots without chemical treatment showed the highest physiological potential. the fungi fusarium oxysporum, alternaria alternata, cladosporium cucumerinum, aspergillus niger, penicillium digitatum, rhizopus stolonifer and phoma terrestris were found to be associated with seeds. the health quality did not interfere with the physiological quality of the 'menina brasileira' squash seeds.
Sele??o de antagonistas fúngicos a Fusarium solani e Fusarium oxysporum em substrato comercial para mudas
Ethur, Luciana Zago;Blume, Elena;Muniz, Marlove Fátima Bri?o;Flores, Maria Georgina Veiga;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000600047
Abstract: tests in vitro are usually used for the initial selection of biocontrol agents against soil fungi, lacking methodologies using soil and/or substrate. the objective of this research was to accomplish the mass selection of fungi isolates antagonistic to f. solani and f. oxysporum in commercial substrate for seedlings. two experiments were conducted, with the pathogens f. solani and f. oxysporum, and 98 possible antagonistic fungi of the genera penicillium claviforme, penicillium, aspergillus and cladosporium. the suspension of the pathogens was inoculated in the substrate, in plastic cups, and the suspension of the other fungi was added five days later. the number of colony-forming unit of f. solani and f. oxysporum/g of substrate was counted after nine days. of the 98 isolates used against f. solani, 43% did not differ from the control, and 57% reduced its development in the substrate, with the three best isolates belonging to the genus penicillium claviforme. the three isolates of penicillium claviforme selected for f. solani were also efficient against f. oxysporum.
Qualidade fisiológica e sanitária de sementes de mel?o (Cucumis melo)
Muniz, Marlove Fátima Bri?o;Gon?alves, Nilton;Garcia, Danton Camacho;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000300048
Abstract: the objective of this work was to evaluate the efficiency of different vigour tests in the identification of vigour levels and health quality of melon (cucumis melo l.) seeds. four seed lots of gaúcho and carvalho cultivars were evaluated. seeds were submitted to the first germination counting, field emergence, controlled deterioration and aging, cold vigour and health tests. results indicated that controlled deterioration and accelerated aging tests presented enough sensibility for evaluating the physiological potential of melon seeds. tests of seedling evaluation did not show enough sensibility to identify hiht quality seed lots. aspergillus ssp. and fusarium oxysporum were detected associated with seeds.
Compara??o entre métodos para avalia??o da qualidade fisiológica e sanitária de sementes de mel?o
Muniz, Marlove Fátima Bri?o;Gon?alves, Nilton;Garcia, Danton Camacho;Kulczynski, Stela Maris;
Revista Brasileira de Sementes , 2004, DOI: 10.1590/S0101-31222004000200020
Abstract: the objective of this study was to evaluate the efficiency of different vigour tests in the identification of vigour levels and health quality of melon seeds (cucumis melo l.). four seed lots of the gaúcho and carvalho cultivars produced in hulha negra-rs were evaluated. seeds were submitted to the germination tests, first germination counting, field emergency, controlled deterioration, accelerated aging test, seedlings vigour classification, cold vigour test and health test. results indicated that the controlled deterioration and accelerated aging tests presented enough sensitivity for evaluating physiological potential melon seeds but evaluation of seedlings tests did not show enough sensitivity to accomplish a classification of lots. aspergillus ssp. and fusarium oxysporum were detected in seeds and showed height correlation with dead seeds in vigour tests.
Efeitos do extracto aquoso de Nerium Oleander L. na germina??o e na sanidade de sementes de Peltophorum dubium (Sprengel) Taubert
Kanieski,Maria Raquel; Chassot,Tatiane; Muniz,Marlove Fátima Bri?o;
Revista de Ciências Agrárias , 2008,
Abstract: the use of plant extracts in the fungi control can be an alternative to the use of chemicals. this work has the purpose to test the efficiency of the aqueous extract obtained from leaves of nerium oleander (espirradeira) on seed germination of peltophorum dubium (canafístula), as well on seedling vigour and seed sanity. nine treatments were tested, with three concentrations of extract: 0, 50 and 100%, and three assay times: 15, 30 and 45 minutes. it was found that the aqueous extract of n. oleander was not effective for controlling the pathogens associated with p. dubium seeds, and there is an increase of fungi incidence. however, the aqueous extract of n. oleander helped seed germination and vigour of the resulting seedlings and the most infected seeds were the ones showing better germination and development.
Detec??o, transmiss?o, patogenicidade e controle químico de fungos em sementes de paineira (Ceiba speciosa)
Lazarotto, Marília;Muniz, Marlove Fátima Bri?o;Santos, álvaro Figueredo dos;
Summa Phytopathologica , 2010, DOI: 10.1590/S0100-54052010000200005
Abstract: the aim of this work was to evaluate fungus association, transmission and pathogenicity, besides chemical seed treatment in ceiba speciosa seeds from different regions of southern brazil. seven seed samples were used to do the germination test, fungus detection by blotter test and potato-dextrose-agar (pda), fungus transmission and pathogenicity tests; besides, chemical seed treatments were tested. germination ranged from 0 to 59,5%. the following fungi were associated in the seeds: fusarium sp., alternaria sp., colletotrichum sp., curvularia sp. and pestalotia sp.; in addition, fusarium sp. was found in all the samples. alternaria sp. and fusarium sp. were transmitted by seeds. the isolates of alternaria sp., colletotrichum sp. and fusarium sp., were pathogenic to seedlings and seeds. the seed treatment with methyl tiophanate and the combination captan + methyl tiophanate reduced fusarium sp. incidence.
Testes para determina o do potencial fisiológico de sementes de abóbora = Tests to determine the physiological potential of squash seeds
Derblai Casaroli,Danton Camacho Garcia,Nilson Lemos de Menezes,Marlove Fátima Bri?o Muniz
Acta Scientiarum : Agronomy , 2009,
Abstract: O objetivo do trabalho foi comparar a eficiência de testes para determina o do potencial fisiológico de lotes de sementes de abóbora. Avaliaram-se seis lotes de sementes, submetidos a testes de germina o e vigor (primeira contagem; velocidade de germina o;germina o à temperatura subótima; envelhecimento acelerado; emergência de plantulas; crescimento e fitomassa seca de plantulas (radícula, hipocótilo e total) e plantas (raiz, caule, raiz e caule, folhas e total). Utilizou-se o delineamento inteiramente casualizado, com quatro repeti es; as médias foram comparadas pelo teste de Tukey (p ≤ 0,05). Realizou-se também o teste de correla o de Pearson. Os testes de primeira contagem, velocidade de germina o, envelhecimento acelerado, fitomassa seca de raiz e caule e de folhas de plantas,podem ser utilizados para avaliar potencial fisiológico de sementes de abóbora. This work aimed to determine the efficiency of different tests to access the physiological potential of squash seed lots. Six seed lots were submitted to germination and vigor tests (germination first count; speed of germination; cool germination; accelerated aging; seedling emergence; seedlings growth and dry biomass (root, hypocotyl and total) and plants (root, stem and total length, root, stem,root plus stem, leaves and total). A completely randomized design was used with four replicates. The averages were compared by the Tukey test (p ≤ 0.05). Pearson’s correlation test was also performed. The germination first count, speed of germination, accelerated aging, root plus stem and leaves dry biomass from plants evaluated in the 21st day after sowing can be used to determine the physiological potential of squash seeds.
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