|
|
|
| Registros recuperados: 14 | |
|
|
| Kolb,Rosana Marta; Pilon,Natashi Aparecida Lima; Durigan,Giselda. |
| Few studies address the ecology of herbs of Cerrado grasslands, which are ecosystems where the long dry season, high temperatures, insolation, fire and invasive grasses greatly influencing germination and the establishment of plants. We assessed germination of 13 species of Poaceae from Cerrado grasslands under nursery conditions or in germination chambers, the latter with i) recently collected seeds and seeds after six months storage, ii) under constant and alternating temperatures, and iii) in the presence and absence of light. Germinability, mean germination time (MGT) and required light were quantified to elucidate factors involved in successful germination. Germinability was low for most grasses, probably because of low seed viability. For most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Grasslands; Poaceae; Savanna; Seed storage; Seed viability. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100087 |
| |
|
| |
|
|
| Papú,Sofía; Lagos Silnik,Susana; Campos,Claudia M. |
| Ramorinoa girolae Speg. is a “vulnerable” tree endemic to Argentina. During the pre-dispersal stage, the seeds are predated by Anypsipyla univitella. The objectives of this study were to describe some reproductive parameters (size and number of fruits and seeds) of R. girolae, to quantify pre-dispersal seed loss by abortion and predation, and to test the effect on pre-dispersal seed predation of fruit production (per tree, of co-specific neighbors, and the sum of both), size of fruits, number of seeds per fruit, and number of predators per fruit. As seeds can be partially consumed by the predator, the viability of partially damaged seeds was assessed as well. At Ischigualasto Park, we sampled 17 adult trees from 3 stands spaced 4 km... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anypsipyla univitella; Fruit production; Fruit size; Seed abortion; Seeds per fruit; Seed viability. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722015000400010 |
| |
|
| |
|
| |
|
|
| Alves,Edna Ursulino; Santos-Moura,Sueli da Silva; Moura,Mácio Farias de; Silva,Rosemere dos Santos; Galindo,Evio Alves. |
| ABSTRACT: Crataeva tapia L. is a fruit native to the Brazilian savanna, the Caatinga, and is used in the production of soft drinks and other beverages. Given the importance of this species and the lack of knowledge about its seeds, this research aimed to evaluate the physiological quality of C. tapia L. seeds subjected to different environments and drying periods. Seeds were dried for the following time periods: 0 (no drying), 24, 48, 72, 96, and 120 hours, in the laboratory environment (25°C and 90% RH) and in a greenhouse (30°C and 80% RH). After the drying period, seeds from each of the treatments were used for determining the water content, germination, and vigor (using tests for emergence, first count of germination and emergence, rate of germination... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trapiá; Native fruit; Seed viability. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900202 |
| |
|
|
| Lima,Cristina B; Boaventura,Ana C; Villela,Tamiris T. |
| ABSTRACT The tetrazolium (TZ) test is one of the main methods to estimate vitality or viability and seed vigor. The aim of this study was to improve the methodology and reduce the execution time of tetrazolium test on carrot seeds, considering two existing references on this subject. Eight lots of ‘Brasilia’ carrot seeds were used. The hydration, during the pre-conditioning of the seeds, was done in two ways: directly in water during 18 hours and in rolls of filter paper during 2 hours. Seed color was analyzed through combinations between cutting types, concentration, period and temperature used during contact with the TZ solution. Three types of longitudinal cutting were used, before immersion in the tetrazolium solution: a) lateral and as distant as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Daucus carota; Vegetables; Seed viability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200240 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Mira,Sara; Veiga-Barbosa,Luciana; González-Benito,María Elena; Pérez-García,Félix. |
| The objective of this work was to evaluate the use of the conductivity test as a means of predicting seed viability in seven Passiflora species: P. alata, P. cincinnata, P. edulis f. edulis, P. edulis f. flavicarpa, P. morifolia, P. mucronata, and P. nitida. Conductivity of non-desiccated (control), desiccated, and non-desiccated cryopreserved seeds was determined and related to their germination percentage. The obtained results suggest that the electrical conductivity test has potential as a germination predictor for P. edulis f. flavicarpa seed lots, but not for the other tested species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passiflora; Seed cryopreservation; Seed desiccation; Seed viability. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000600510 |
| |
|
|
| Alcântara,Aline S.; Prado,Jéssica P. do; Corrêa,Rafael de G.; Silva,Rouverson P. da; Voltarelli,Murilo A.; Vieira,Roberval D.. |
| ABSTRACT The success of soybean cultivation depends on several factors, one which is the use of high-quality seeds, which can guarantee growth of the desired plant population. The objective of this study was to monitor possible failures during the seed production process, and to determine the association between germination and tetrazolium tests through tools of Statistical Process Control (CEP). The experimental design was based on premises of the CEP, using percentage of germination, seed viability, mechanical damage, bed bug, and moisture as indicators of quality. It is possible to detect flaws in the soybean production process through control charts, as well as through germination and tetrazolium tests; results indicated that germination failures are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max L.; Control charts; Quality indicators; Seed viability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000689 |
| |
| Registros recuperados: 14 | |
|
|
|
