Topic
Elephantopus
About: Elephantopus is a research topic. Over the lifetime, 35 publications have been published within this topic receiving 387 citations.
Papers
TL;DR: The results show that germination of seeds of a range of Asteraceae species varies with temperature and light regime; they provide an initial basis on which to test and interpret the effects of seasonal factors on germination and field establishment.
Abstract: Achenes of thirteen native Asteraceae species common to the natural grassland or weeds of the southern region of Brazil were tested for germination over a range of alternating temperatures ( 20/10; 25/15; 30/20 and 35/25°C), and under constant temperatures ( 20; 25 and 30°C) with light or not .Only fresh collected achenes (herein = seeds) were used. The optimum temperature for germination differed among the species, with Elephantopus mobillis; Eupatorium laevigatum; Mikania cordifolia; Senecio oxyphyllus; Trixis praestans germinating the most over all temperatures tested. Eclipta alba seeds germination was promoted at 30°C. Colder treatments promoted germination in Tagetes minuta , and in Senecio heterotrichius; S.selloi; Stenachaenium campestre; Symphyopappus casarettoi and Vernonia nudiflora germination was equivalent at 20 or 25°C. Light promoted germination for all species except in Stenachaenium campestre and Tagetes minuta, the latter being a negative photoblastic species. According to the mean time for germination, the species could be ranked in: fast -less than 5 days- (Baccharis trimera; Eclipta alba; Elephantopus mollis; Stenachaenium campestre and Vernonia nudiflora); intermediate: between 5 and 10 days- (Eupatorium laevigatum; Mikania cordifolia and Tagetes minuta) ; slow: more than 10 days-(Senecio heterotrichius; S.oxyphyllus; S.selloi; Symphyopappus casarettoi; Trixis praestans). The results show that germination of seeds of a range of Asteraceae species varies with temperature and light regime; they provide an initial basis on which to test and interpret the effects of seasonal factors on germination and field establishment. In addition, comments on the agar and sand substrates were made.
109 citations
TL;DR: Ulster provides an effective, safe modality for determining the reproductive status of adult female tortoises and was effective in locating both right and left ovarian structures in 92% of the trials.
Abstract: This study demonstrates the efficacy of using ultrasound to determine the presence of ovarian developing, preovulatory, and atretic follicular structures and oviductal eggs in the Galapagos tortoise, Geochelone elephantopus spp. Ultrasound was effective in locating both right and left ovarian structures in 92% (n = 100 ovaries) of the trials. Developing and preovulatory follicles and oviductal eggs were echogenically visualized and had measurements ranging from 18 to 44 mm (n = 93) and 55 to 68 mm (n = 9), respectively. Atretic follicles ranged in size from 10 to 38 mm (n = 10). In one trial with four G. elephantopus, ultrasound observations were validated with the use of laparoscopy. All procedures were accomplished without general anesthesia on a specifically designed restraining table. Ultrasound provides an effective, safe modality for determining the reproductive status of adult female tortoises.
44 citations
Journal Article•
TL;DR: The antitumour activity of the leaves of Elephantopus scaber has been evaluated against Dalton's ascitic lymphoma in Swiss albino mice and treatment was found to enhance peritoneal cell counts.
Abstract: The antitumour activity of the leaves of Elephantopus scaber has been evaluated against Dalton's ascitic lymphoma (DAL) in Swiss albino mice. A significant enhancement of mean survival time of Elephantopus scaber treated tumour bearing mice was found with respect to control group. Elephantopus scaber treatment was found to enhance peritoneal cell counts. When these Elephantopus scaber treated animals underwent I.p. inoculation with DAL cells, tumour cell growth was found to be inhibited. Fourteen days after transplantation, Elephantopus scabertreated group were able to reverse the changed in the haematological parameters, protein and PCV consequent to tumour inoculation.
28 citations
TL;DR: The ovary is bicarpellary, syncarpous and unilocular, and the integument is distinguishable into three zones, which are more or less similar in all the species except for some minor variations.
24 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 1 |
| 2019 | 1 |
| 2018 | 1 |
| 2016 | 1 |
| 2015 | 1 |