Diversidad y composición florística del Bosque Los Búhos ubicado la Escuela Superior Politécnica de Chimborazo, Ecuador

Patricio Xavier Lozano Rodríguez; Aracely Armas; Martha Gualán; Miguel Guallpa

doi:10.29019/enfoqueute.v9n3.211

Diversidad y composición florística del Bosque Los Búhos ubicado la Escuela Superior Politécnica de Chimborazo, Ecuador

Enfoque UTE ◽

10.29019/enfoqueute.v9n3.211 ◽

2018 ◽

Vol 9 (3) ◽

pp. 12-28

Author(s):

Patricio Xavier Lozano Rodríguez ◽

Aracely Armas ◽

Martha Gualán ◽

Miguel Guallpa

Keyword(s):

Retama Sphaerocarpa ◽

Carpobrotus Edulis ◽

Agave Americana

Para promover procesos de conservación es fundamental conocer la biodiversidad objeto de análisis. En este sentido el objetivo del presente trabajo fue determinar la composición, diversidad e importancia florística del Bosque Los Búhos para generar una línea base que permita el manejo del recurso con propósitos académicos. Por tal motivo en la presente investigación se realizó una descripción de la composición florística, se determinó los índices de biodiversidad alfa (α) y beta (β), finalmente se calculó la importancia ecológica de las especies (IVI´s). Los datos indican que la composición florística del bosque se encuentra conformada en tres estratos por 56 especies, 18 órdenes y 27 familias. El estrato arbóreo presenta una biodiversidad media (2,534-Margalef) y dominancia alta (0,8367-Simpson), el estrato arbustivo tiene baja biodiversidad (1,811-Margalef) y baja dominancia (0,4441-Simpson), y el estrato herbáceo presenta biodiversidad media (3,882-Margalef) y dominancia alta (0,7101-Simpson). Las especies con el mayor IVI´s para el estrato arbóreo son Mimosa quitensis Benth., Acacia retinodes Schltdl., y Tecoma stans (L.) Juss. ex Kunth. Para el estrato arbustivo son Agave americana L., Lantana megapotamica (Spreng.) Tronc., Retama sphaerocarpa y Opuntia cylindrica. Finalmente para el estrato herbáceo es Carpobrotus edulis.

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Preliminary Cytotoxic Activity of Sutherlandia frutescens and Carpobrotus edulis on Malignant glioblastoma Cells

10.26538/tjnpr/v3i5.5 ◽

2019 ◽

Vol 3 (5) ◽

pp. 175-179 ◽

Cited By ~ 1

Author(s):

Sylvester Omoruyi ◽

◽

Adaze Enogieru ◽

Okobi Ekpo ◽

◽

...

Keyword(s):

Cytotoxic Activity ◽

Glioblastoma Cells ◽

Carpobrotus Edulis ◽

Sutherlandia Frutescens

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Phytochemical profile and insecticidal activity of Agave americana leaf extract towards Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Environmental Science and Pollution Research ◽

10.1007/s11356-019-05316-6 ◽

2019 ◽

Vol 26 (19) ◽

pp. 19468-19480 ◽

Cited By ~ 3

Author(s):

Asma Mami Maazoun ◽

Soumaya Haouel Hamdi ◽

Feten Belhadj ◽

Jouda Mediouni Ben Jemâa ◽

Chokri Messaoud ◽

...

Keyword(s):

Insecticidal Activity ◽

Leaf Extract ◽

Sitophilus Oryzae ◽

Agave Americana ◽

Phytochemical Profile

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Increasing the Adsorption Efficiency of Methylene Blue by Acid Treatment of the Plant Carpobrotus edulis

Chemistry Africa ◽

10.1007/s42250-021-00233-z ◽

2021 ◽

Author(s):

Abdelkader Dabagh ◽

Abdellah Bagui ◽

M’hamed Abali ◽

Rachid Aziam ◽

Mohamed Chiban ◽

...

Keyword(s):

Methylene Blue ◽

Acid Treatment ◽

Adsorption Efficiency ◽

Carpobrotus Edulis

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Dye removal by activated carbon produced from Agave americana fibers: stochastic isotherm and fractal kinetic studies

Environmental Science and Pollution Research ◽

10.1007/s11356-020-10768-2 ◽

2020 ◽

Author(s):

Taher Selmi ◽

Ghizlane Enaime ◽

Aïda Kesraoui ◽

Abdelaziz Baçaoui ◽

Mongi Seffen

Keyword(s):

Activated Carbon ◽

Dye Removal ◽

Kinetic Studies ◽

Agave Americana

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Nodulation and performance of exotic and native legumes in Australian soils

Australian Journal of Botany ◽

10.1071/bt03053 ◽

2003 ◽

Vol 51 (5) ◽

pp. 543 ◽

Cited By ~ 17

Author(s):

María A. Pérez-Fernández ◽

Byron B. Lamont

Keyword(s):

Native Species ◽

Treated Soil ◽

Retama Sphaerocarpa ◽

Australian Species ◽

And Performance ◽

Natural Stands ◽

High Degree ◽

Western Australian ◽

Cytisus Balansae ◽

New Habitats

Six Spanish legumes, Cytisus balansae, C. multiflorus, C. scoparius, C. striatus, Genista hystrix and Retama sphaerocarpa, were able to form effective nodules when grown in six south-western Australian soils. Soils and nodules were collected from beneath natural stands of six native Australian legumes, Jacksonia floribunda, Gompholobium tomentosum, Bossiaea aquifolium, Daviesia horrida, Gastrolobium spinosum and Templetonia retusa. Four combinations of soils and bacterial treatments were used as the soil treatments: sterile soil (S), sterile inoculated soils (SI), non-treated soil (N) and non-treated inoculated soils (NI). Seedlings of the Australian species were inoculated with rhizobia cultured from nodules of the same species, while seedlings of the Spanish species were inoculated with cultures from each of the Australian species. All Australian rhizobia infected all the Spanish species, suggesting a high degree of 'promiscuity' among the bacteria and plant species. The results from comparing six Spanish and six Australian species according to their biomass and total nitrogen in the presence (NI) or absence (S) of rhizobia showed that all species benefitted from nodulation (1.02–12.94 times), with R.�sphaerocarpa and C. striatus benefiting more than the native species. Inoculation (SI and NI) was just as effective as, or more effective than the non-treated soil (i.e. non-sterile) in inducing nodules. Nodules formed on the Spanish legumes were just as efficient at fixing N2 as were those formed on the Australian legumes. Inoculation was less effective than non-treated soil at increasing biomass but just as effective as the soil at increasing nitrogen content. Promiscuity in the legume–bacteria symbiosis should increase the ability of legumes to spread into new habitats throughout the world.

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Extracts of Agave americana inhibit aflatoxin production in Aspergillus parasiticus

World Mycotoxin Journal ◽

10.3920/wmj2010.1219 ◽

2011 ◽

Vol 4 (1) ◽

pp. 37-42 ◽

Cited By ~ 3

Author(s):

A. Rosas-Taraco ◽

E. Sanchez ◽

S. García ◽

N. Heredia ◽

D. Bhatnagar

Keyword(s):

Aspergillus Parasiticus ◽

Public Awareness ◽

Aflatoxin Production ◽

Aflatoxin Contamination ◽

Aqueous Extracts ◽

Total Aflatoxin ◽

Toxigenic Fungi ◽

Agave Americana ◽

Acid Accumulation ◽

Norsolorinic Acid

Toxigenic fungi invade crops prior to harvest as well as during storage and produce harmful, even carcinogenic toxins such as aflatoxins. Since consumers demand safe commodities, and due to enhanced public awareness of the dangers of many synthetic fungicides, the importance of investigating alternative, natural products to control these toxigenic fungi is clear. This study investigated the effect of aqueous extracts of Agave americana on growth, conidia and aflatoxin production. Aspergillus parasiticus strains SRRC 148, SRRC 143 (Su-1), and A. parasiticus SRRC 162, a mutant (nor-) that accumulates norsolorinic acid (NOR, an orange-coloured intermediate of the aflatoxin pathway), were first inoculated into Adye and Mateles liquid medium, then plant extracts were added, and incubated at 28 °C for 7 days. Aflatoxin and norsolorinic acid were assayed by HPLC and spectrophotometry, respectively. While the extract of A. americana stimulated growth of the studied fungi, conidiogenesis, norsolorinic acid accumulation (in the nor- mutant), and aflatoxin production were significantly affected. The reduction was produced by the extracts at concentrations higher than 5-10 mg/ml, where all types of total aflatoxin analysed (aflatoxins B1, B2, G1 and G2) were reduced from 64% to >99% in the whole culture, and a reduction of 75% of norsolorinic acid. The results of the present work indicate that extracts of A. americana may be promising safe alternatives to harmful fungicides for controlling aflatoxin contamination.

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