How far can climate changes help to conserve and restore Garcinia kola Heckel, an extinct species in the wild in Benin (West Africa)

2018 ◽  
Vol 10 (5) ◽  
pp. 203-213 ◽  
Author(s):  
Kévin G. DJOTAN Akotchiffor ◽  
Kossi N. AOUDJI Augustin ◽  
Akouavi F. CODJIA Sylvie ◽  
J. GBÈTOHO Alain ◽  
KOURA Kourouma ◽  
...  
2020 ◽  
Vol 74 (2) ◽  
pp. 115-125 ◽  
Author(s):  
Colombe Dadjo ◽  
Aggrey Bernard Nyende ◽  
Kolawolé Valère Salako ◽  
Achille Hounkpèvi ◽  
Achille Ephrem Assogbadjo

2015 ◽  
Vol 11 (2) ◽  
pp. 223-231
Author(s):  
FB Yakubu ◽  
JO Ogunade ◽  
OT Bolanle-Ojo ◽  
DK Yahaya

Garcinia kola plays an important socioeconomic role in the Africa culture. Inspite of this, the plant only exists in the wild or as part of left over in the Agroforestry farms. Therefore, this research examined the phenology in seed germination for possible plantation establishment. G. kola seed dormancy and growth was investigated using hormone Napthalene Acetic Acid (NAA) and Benzene Amino Purine (BAP) application to induce quick germination and early growth The experiment was laid in a Completely Randomized Design (CRD) with seven treatments (0.5mg/ml BAP, 0.5mg/ml NAA, 1mg/ml BAP, 1mg/ml NAA, 2mg/ml BAP, 2mg/ml NAA and Control) in twenty replications. The results showed that Garcinia kola seeds germinated in seven weeks in IBA. Growth were assessed for 19wks and the result showed that Length of Radicle (LR) and Number of Radicle (NR) were significantly affected by the treatments, while 0.5mg/ml IBA gave the best result among the treatments. Length of Plumule, Number of Leaves and Collar diameter were not significantly affected by the treatments.Keywords: Garcinia kola, seed, hormone, dormancy, germination


2018 ◽  
Vol 14 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Rony R. Kuechler ◽  
Lydie M. Dupont ◽  
Enno Schefuß

Abstract. The Pliocene is regarded as a potential analogue for future climate with conditions generally warmer-than-today and higher-than-preindustrial atmospheric CO2 levels. Here we present the first orbitally resolved records of continental hydrology and vegetation changes from West Africa for two Pliocene time intervals (5.0–4.6 Ma, 3.6–3.0 Ma), which we compare with records from the last glacial cycle (Kuechler et al., 2013). Our results indicate that changes in local insolation alone are insufficient to explain the full degree of hydrologic variations. Generally two modes of interacting insolation forcings are observed: during eccentricity maxima, when precession was strong, the West African monsoon was driven by summer insolation; during eccentricity minima, when precession-driven variations in local insolation were minimal, obliquity-driven changes in the summer latitudinal insolation gradient became dominant. This hybrid monsoonal forcing concept explains orbitally controlled tropical climate changes, incorporating the forcing mechanism of latitudinal gradients for the Pliocene, which probably increased in importance during subsequent Northern Hemisphere glaciations.


2018 ◽  
Vol 34 (2) ◽  
pp. 241-250 ◽  
Author(s):  
Seide M. Akoro ◽  
Olapeju O. Aiyelaagbe ◽  
Patricia A. Onocha ◽  
James B. Gloer

2017 ◽  
Vol 16 (17) ◽  
pp. 995-1006
Author(s):  
Olakunle Idowu Sunday ◽  
Ayodele Adeyemo Morenikeji ◽  
Abidemi Aderibigbe Segun ◽  
Idowu Omotayo Oluwabukola

2011 ◽  
Vol 4 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Joseph M. Asomaning ◽  
Nana S. Olympio ◽  
Moctar Sacande

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