Topic
Comanthera elegans
About: Comanthera elegans is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 10 citations.
Papers
TL;DR: It is shown that the best period for the plant sexual reproduction surpasses the bestperiod for commercial collection and the reservation of non-harvesting areas; maintaining remnants of inflorescences in collected areas; and encouraging cultivation should be considered.
Abstract: Comanthera elegans (Bong.) L.R. Parra & Giul (“sempre-viva-pe-de-ouro”) is one of the most economically important species among the Eriocaulaceae in Brazil. Its inflorescences are used to make handicrafts and have long been exported to all over the world. The collection period usually begins in the second half of April and extends to May, occasionally until the first half of June. We assessed seed production and germinability throughout the 2006 harvest season: April–November, as well as the variation in morphology and anatomy of inflorescences along this period. In the evaluated flowering, seeds still had not yet been completely formed by early April, the onset month of commercial collection. Instead, germinable seeds were first observed in May, while seed dispersal was already in progress in early June. Collection in June resulted in plant uprooting, due to the tighter attachment of the scape to the rosette. The beginning and peak of germination occurred earlier for seeds from the most delayed collections, and the highest germinability was presented by seeds collected in September. We showed that the best period for the plant sexual reproduction surpasses the best period for commercial collection. Due to the onset of germinable seeds only as late as at the second half of the harvesting period, encouraging the delayed beginning of inflorescence collection may well represent a management strategy. Furthermore, the reservation of non-harvesting areas, which would secure the maintenance of plant populations in the wild and thus guarantee seed production and dispersal; maintaining remnants of inflorescences in collected areas; and encouraging cultivation should be considered.
8 citations
TL;DR: Some Eriocaulaceae species have considerable economic importance as ornamental plants, particularly those of the Syngonanthus Ruhland genus and the recently reestablished Comanthera L.B. genus.
3 citations
TL;DR: This study aimed to assess aspects of the development of C. elegans in three cultivation systems: beds, rows, and whole area, and the highest inflorescence production in terms of weight and number was observed in the cultivation in beds at 1,624 kg.m-2.
Abstract: Marketing the inflorescences of Comanthera elegans (Bong.) L.R. Parra & Giul. represents a source of income to many families from extractives communities in the portion of the Espinhaco Range located in the state of Minas Gerais, Brazil. Cultivating this species stands out by allying income generation with conservation since the species is currently endangered. This study aimed to assess aspects of the development of C. elegans in three cultivation systems: beds, rows, and whole area. Sowing took place in January 2009 and the inflorescences were harvested in May 2010, which characterized the experimental period. Emergence; plant density; rates of flowering, mortality, resprouting, and recruiting of new individuals; and production of inflorescences per plant and per area were assessed. Emergence began approximately 50 days after sowing. Plant density ranged from 130 to 350 plants.m-2 among the three cultivation systems. The highest mortality rate (18%) was observed at the peak of the dry season (August) and the overall mortality rate over one reproductive cycle was 49%. Of the plants that lost the aerial part, 36% resprouted. Sprouting and seed germination accounted for 30 and 3% of the recruiting of new individuals, respectively. C. elegans had two bloom (AprilMay 2009 and April-May 2010): 5.4% of the plants bloomed in the first season and 78%, in the second. Each plant produced between three and 178 inflorescences and the highest inflorescence production in terms of weight (232 g.m-2) and number (2,910 inflorescences.m-2) was observed in the cultivation in beds at 1,624 kg.ha-1.
1 citations
TL;DR: There is variation in the expression of the enzymes SOD, ADH and MDH in seeds of both species during the germination process and the enzyme endo-β-mannanase presents greater activity in seeds with radicle protrusion in the two studied species.
Abstract: The objective of this study was to evaluate the enzymes expression during the seeds germination process of ever-lasting species Comanthera elegans and Comanthera bisulcata. For the evaluation of the seeds physiological potential, the germination test and index of germination speed were performed. The expression of enzymes esterase (EST), malate dehydrogenase (MDH), alcohol dehydrogenase (ADH), superoxide dismutase (SOD), catalase (CAT) and endo-β-mannanase during the germination process were evaluated. The expression of these enzymes was evaluated in dried seeds, in the protrusion, in the emergence of the primal leaf, at the beginning of the formation of normal seedling and dormant seeds at the end of the germination process. To the extent that the germination process occurs in the species C. bisulcata and C. elegans there is greater expression of the enzyme CAT and lower of the enzyme EST. There is variation in the expression of the enzymes SOD, ADH and MDH in seeds of both species during the germination process. The enzyme endo-β-mannanase presents greater activity in seeds with radicle protrusion in the two studied species.
1 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2017 | 1 |
| 2015 | 1 |
| 2014 | 1 |