Effet des durées de conservation et du traitement à l’eau sur la germination des graines de Tieghemella heckelii Pierre ex A. Chev. (Sapotaceae) en Côte d’Ivoire

Le Makoré est une espèce de bois d’oeuvre de grande valeur commerciale, en danger de disparition dans les forêts tropicales. Cependant, la germination des graines fraiches et celles séchées et conservées est peu connue par l’homme. C’est pourquoi, cette étude vise à maitriser les paramètres de germination des graines de Makoré, afin de l’utiliser dans les reboisements des forêts classées en Côte d’Ivoire, en vue de sa pérennisation. Spécifiquement, il a été question de déterminer le délai de germination, la durée de germination et le taux de germination des graines. Pour ce faire, 5 lots de graines ont été constitués en fonction des durées de conservation sur lesquels 4 traitements à l’eau de robinet ont été appliqués. Les résultats ont montré que le lot 1 ou témoin (graines fraiches), le lot 2 (graines conservées pendant 14 jours) et le lot 3 (graines conservées pendant 21 jours) ont présenté des taux de germination, respectivement, de l’ordre de 72, 22, 55,56 et 41,67%. Le trempage des graines dans l’eau de robinet a réduit considérablement le délai de germination des graines du lot 1 à 25 jours et a relevé le taux de germination du prétraitement 4 du lot 1 (graines ayant séjourné dans l’eau pendant 6 jours) à 100%. Il ressort de cette étude que pour produire des plants de Makoré, les graines fraiches et celles séchées et conservées pendant deux et trois semaines peuvent être utilisées.Mots clés: Makoré, espèce menacée, conservation des graines, prétraitement, paramètres de germination, Côte d’Ivoire. English Title: Effect of storage times and water treatment on germination of the seeds of Tieghemella heckelii Pierre ex A. Chev. (Sapotaceae) in Côte d’Ivoire Makoré is a timber species of great commercial value, in danger of disappearing in tropical forests. However, the germination of fresh seeds and those dried and preserved is little known by man. That is why, this study aims to control the seeds germination parameters of Makoré, in order to use it in the reforestation of the classified forests in Côte d’Ivoire, with a view to its perpetuation. Specifically, there has been talk of determining germination time limit, germination duration and seed germination rate. To do this, 5 lots of seeds were constituted according to the storage periods on which 4 treatments with tap water were applied. The results showed that the lot 1 or control (fresh seeds), lot 2 (seeds stored for 14 days) and lot 3 (seeds stored for 21 days) showed germination rates, respectively, of the order of 72.22, 55.56 and 41.67%. Soaking of the seeds in the tap water significantly reduced the germination time limit of seeds from lot 1 to 25 days and increased the germination rate of pretreatment 4 of lot 1 (seeds having remained in water for 6 days) 100%. This study shows to produce seedlings, fresh seeds and those dried and stored for two and three weeks can be used.Keywords: Tieghemella heckelii, threatened species, storage seeds, pretreatment, germination parameters, Côte d’Ivoire.

Download Full-text

Effets de cinq prétraitements sur la germination du vène (Pterocarpus erinaceus Poir., Fabaceae) dans la Réserve du Haut Bandama (Côte d'Ivoire)

European Scientific Journal ESJ ◽

10.19044/esj.2018.v14n30p438 ◽

2018 ◽

Vol 14 (30) ◽

pp. 438 ◽

Cited By ~ 1

Author(s):

N’golo Bamba ◽

Noufou Doudjo Ouattara ◽

Djézou Konan ◽

Adama Bakayoko ◽

Fezan Honora Tra Bi

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Germination Rate ◽

Natural Populations ◽

Cote D’Ivoire ◽

Germination Time ◽

The North ◽

Côte D'ivoire ◽

Germination Ability ◽

Pterocarpus Erinaceus

Pterocarpus erinaceus Poir (Fabaceae) is a sudanese multipurpose species ranging in Côte d'Ivoire, at the north of the 8 th parallel. This species is object of illegal exploitation and the survival of its natural populations is strongly threatened. The sustainable management of this resource requires an improvement of its germinative capacities. To achieve this goal, five pretreatments were applied to seeds collected from a population of Pterocarpus erinaceus in the “Réserve du Haut Bandama”. These treatments include flowing water soaking during three days or 72 hours (STE 3), water soaking at 60 ° C (STE 60), and at 100° C (STE 100), removal of the shell of the fruit (SD) and light fire burning (SF) as well as a control (no pretreatment applied, SND). Germination rate (TG), germination time (DG) and mean germination time (GMT) were evaluated. The results showed that the husked seeds have good germination ability with a rate of 68.5% and a germination time of a week. It also appears that the seeds of the species are very sensitive to heat. Indeed no germination was observed under the pretreatments of light fire burning and soaking in boiling water (100 °C). In addition to this, the shell of the fruit is a factor of dormancy (seed coat / pericarp dormancy). This dormancy can be removed with soaking inflowing water.

Download Full-text

Germination Test of Shea Seeds (Vitellaria paradoxa C.F. Gaertn) in Nursery on Substrates of Northern Côte d’Ivoire

Asian Plant Research Journal ◽

10.9734/aprj/2019/v3i230064 ◽

2020 ◽

pp. 1-13

Author(s):

Alui Konan Alphonse ◽

Diarrassouba Nafan ◽

Yao Saraka Didier Martial

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Abiotic Factors ◽

Germination Rate ◽

Organic Fertilization ◽

Cote D’Ivoire ◽

Côte D'ivoire ◽

Two Factors ◽

Shea Tree

Aims: The present study aims to evaluate the effect of some abiotic factors on the quality of seed germination of shea tree, a plant of great economic interest for the rural populations in Northern Côte d'Ivoire. Study Design: The trials were conducted in a nursery where two factors were considered. These were the substrate, with six modalities and shelter with two modalities. Six small pits, each of size 60 x 60 cm, surface 3600 cm2 and 15 cm of depth were dug and then filled with different substrates. Place and Duration of Study: The work was carried out in 2018 in the district of Korhogo in Northern Côte d'Ivoire. Methodology: Each treatment received 36 seeds of shea tree giving a total of 216 seeds per test. The seeds used were all dark brown, ellipsoid in shape with masses ranging from 10 to 11 g. The experiment was carried out with a total of 12 treatments, six under a greenhouse hermetically covered with transparent polyethylene plastic and six under a shade made up of a rack covered with maximum Panicum leaves. Results: The first germination was observed at the level of the organic manure treatment at 6 months of degradation installed under the greenhouse (ManB_G = 28 days). The lowest final germination rate was obtained with the organic fertilization at 3 months of degradation installed under the shade (FGP ManA_S = 2.95%) while the highest was observed in the sawdust installed under the greenhouse (FGP S_G = 64.18%). Conclusion: It is concluded that for each substrate, soil or biowaste, the seeds of shea tree have a better ability to germinate under a greenhouse than under a shelter covered with straw.

Download Full-text

Essais de germination et suivi des performances de croissance des plants de Khaya senegalensis (Desv.) A. Juss., en zone soudanienne (Côte d’Ivoire)

Journal of Animal & Plant Sciences ◽

10.35759/janmplsci.v48-2.4 ◽

2021 ◽

Vol 48 (2) ◽

pp. 8673-8685

Author(s):

Pagadjovongo Adama SILUE ◽

Kouadio Arsène Dieudonné KOFFI KOFFI ◽

Adjoua Bénédicte KOFFI ◽

Konan Edouard KOUASSI

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Abiotic Factors ◽

Cultural Value ◽

Timber Species ◽

Cote D’Ivoire ◽

Sowing Depth ◽

Côte D'ivoire ◽

Khaya Senegalensis ◽

Propagation Material

Khaya senegalensis (Acajou de savane) est une espèce de bois d’œuvre couramment exploitée abusivement dans les zones soudaniennes de la Côte d’Ivoire. Cette étude, visant à améliorer la domestication de l’espèce, a testé deux modes de multiplication, l’une utilisant directement les graines et l’autre des portions de tiges pourvues de système racinaire appelées « stumps ». Le matériel de propagation a été collecté sur des sujets de l’espèce puis soumis à l’influence de facteurs abiotiques (intensité de l’ensoleillement, profondeur de semis, types de sols). Les résultats ont montré que les graines traitées à l’eau présentent de bonnes qualités germinatives avec des taux de germination de l’ordre de 80 %, une énergie germinative d’au moins 50 % et une valeur culturale pouvant atteindre 80 %, que cela soit en milieu ombragé ou milieu ensoleillé. Concernant la variation de la profondeur de semis sur les paramètres de germination, les graines de K. senegalensis produisent les meilleurs résultats de germination pour des profondeurs de semis de 1 à 3 cm. La croissance des plants issus de stumps atteint une hauteur de 35 cm contre 28 cm pour les plants issus de graines, en milieu ombragé. Ainsi, la reproduction par voie de stumps présente une technique supplémentaire à la production de plants en pépinière pour le reboisement de l’espèce. ABSTRACT Khaya senegalensis (Savannah mahogany) is a timber species commonly exploited nowadays in the Sudanese areas of Côte d’Ivoire. This study aimed at improving the domestication of the species tested two modes of propagation, one using the seeds directly and the other portions of stems provided with a root system called "stumps". Propagation material was collected from subjects of the species and then exposed to the influence of abiotic factors (intensity of sunshine, depth of sowing, types of soil). The results have shown that the seeds treated with water have good germination qualities with germination rates of the order of 80 %, a germination energy of at least 50 % and a cultural value of up to 80 %, than either in shaded or sunny surroundings. Regarding the variation of the sowing depth on the germination parameters, the seeds of Khaya senegalensis produce the best germination results for sowing depths of 1 to 3 cm. The growth of the plants resulting from stumps reaches a height of 35 cm against 28 cm for the plants resulting from seeds, in shaded environment. So, reproduction by means of stumps presents an additional technique to the production of seedlings in the nursery for the reforestation of the species.

Download Full-text

Effect of the seeds provenance and treatment on the germination rate and plants growth of four forest trees species of Côte d’Ivoire

Journal of Forestry Research ◽

10.1007/s11676-019-01064-y ◽

2019 ◽

Vol 32 (1) ◽

pp. 161-169

Author(s):

Sélastique Doffou Akaffou ◽

Aimé Kouassi Kouame ◽

Nestor Bi Boh Gore ◽

Georges Yao Abessika ◽

Henri Kouadio Kouassi ◽

...

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Germination Rate ◽

Forest Trees ◽

Cote D’Ivoire ◽

Côte D'ivoire

Download Full-text

Qualités morpho-physiologiques et évaluation du comportement germinatif des graines du théier des savanes (Lippia multiflora Moldenke)

International Journal of Biological and Chemical Sciences ◽

10.4314/ijbcs.v14i6.5 ◽

2020 ◽

Vol 14 (6) ◽

pp. 1988-1998

Author(s):

Hervé Cédessia Kéassemon Kone ◽

Nicaise Tetchi Akedrin ◽

Vama Etienne Tia ◽

Fatou Bayoko ◽

Lacina Fanlégué Coulibaly

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Germination Rate ◽

Average Diameter ◽

Cote D’Ivoire ◽

Lippia Multiflora ◽

Physical Measurements ◽

Côte D'ivoire ◽

Teneur En Eau ◽

The Impact

La domestication de Lippia multiflora, plantes aux multiples vertus en pharmacopée et médecine est un enjeu de taille en Côte d’Ivoire. Cependant, l’insuffisance de semences, due au faible taux de germination des graines, limite l’extension de sa culture. La présente étude avait pour objectif l’extraction, la purification et la caractérisation morpho-physiologique des graines de Lippia multiflora Moldenke (Verbenaceae). Il s’agissait plus spécifiquement de déterminer la pureté spécifique, le nombre de graines par unité de masse, le diamètre moyen et le taux d’humidité ; le taux de germination des graines de L. multiflora. Aussi, il s’est agi d’étudier l’impact du milieu sur le pouvoir germinatif des graines et de faire un suivi post-germination des plants en milieu réel. Après extraction des graines, des mesures physiques et des tests de germination ont permis de déterminer les caractéristiques morpho-physiologiques de celles-ci. L’étude a montré que le lot de graine étudié a une pureté spécifique de 70%, les graines ont un diamètre moyen de 0,34± 0.1 mm, une teneur en eau de 14±5.4 % et un taux de germination de 42,25%. Les tests de germination après un séjour prolongé dans divers milieux, révèlent qu’un milieu réfrigéré (7° C) confère une plus longue viabilité aux graines. Le suivi post-germination au champ montre une évolution régulière de la hauteur des plants, passant en moyenne de 2,58 cm à 8,8 cm au bout de 3 mois. Sur la même période, le nombre moyen de feuille varie de 4,03 à 21.Mots clés : Lippia multiflora, graine, caractérisation, germination, suivi post-germination. English Title: Morpho-physiological qualities and evaluation of the germination behavior of seeds of the savannah tea tree (Lippia multiflora Moldenke)The domestication of Lippia multiflora, plants with multiple virtues in pharmacopoeia and medicine is a major challenge in Côte d'Ivoire. However, the lack of seed, due to the low germination rate, limits the extension of its cultivation. The purpose of this study was the extraction, purification and morpho-physiological characterization of the seeds of Lippia multiflora Moldenke (Verbenaceae). More specifically, it involved determining the specific purity, the number of seeds per unit mass, the average diameter and the humidity rate; the germination rate of L. multiflora seeds. Also, it was a question of studying the impact of the environment on the germination power of seeds and of making a post-germination follow-up of the plants in real environment. After the seeds extraction, physical measurements and germination tests were carried out to determine the morpho-physiological characteristics. Results showed that the seed lot studied has a specific purity of 70%, an average diameter of 0.34 0.1 mm, a water content of 14 5.4% and a germination rate of 42.25%. Germination tests after a prolonged stay in various environments reveal that a refrigerated area (7 °C) confers a longer viability to the seeds. Post-germination monitoring in the field shows a steady increase in plant height from an average of 2.58 cm to 8.8 cm after 3 months. Over the same period, the average number of sheets varies from 4.03 to 21.Keywords: Lippia multiflora, seed, characterization, germination, post-germination monitoring.

Download Full-text

Effect of Tithonia diversifolia, Alchornea cordifolia, and Mezoneuron benthamianum on Tomato (Lycopersicon esculuntum) Nursery in Daloa (Côte d’Ivoire)

Journal of Experimental Agriculture International ◽

10.9734/jeai/2021/v43i830729 ◽

2021 ◽

pp. 81-91

Author(s):

Yah N’ Guettia Marie ◽

Koffi Ahébé Marie Hélène ◽

Zadjei N’goran Anderson ◽

Akaffou Doffou Sélastique ◽

Atta Taky Hortense Diallo

Keyword(s):

Seed Germination ◽

Cote D'ivoire ◽

Côte D’Ivoire ◽

Germination Rate ◽

Tithonia Diversifolia ◽

Cote D’Ivoire ◽

Côte D'ivoire ◽

Number Of Leaves ◽

And Control

Aims: Research of alternative solutions to the use of synthetic pesticides. Study Design : Randomized block. Place and Duration of Study: Jean Lorougnon Guédé University (Daloa, Côte d’Ivoire), January to February 2020. Methodology: Extracts of Alchornea cordifolia, Tithonia diversifolia and Mezoneuron benthamianum were evaluated in vitro and in the nursery at 5 g/l, 15 g/l and 25 g/l. In vitro, the blotting paper method was used on tomato seed germination. In the nursery, the powdery extracts were added to the nursery soil bags with four treatments (5 g/l, 15 g/l, 25 g/l and control) and six bags per treatment with five tomato seeds per bag. Germination rate, number of leaves, height and the health status of the plants as well as the incidence and severity of root galls were evaluated. The results showed that in vitro the control had the highest average germination rate (98.5%) followed by T. diversifolia (43.03 to 98.5%), A. cordifolia (35.33 to 68.67%) and M. benthamianum (37.66 to 67.55%). However, in the nursery, T. diversifolial recorded the highest average treated seed germination (38 to 78.33%) and seedling emergence (12.78 to 38.33%) rates compared to the other treatments. Concerning growth parameters, the number of leaves (5.38 to 13.21) and height (5.71 to 15.64 cm) of tomato plants were influenced by the extracts type and concentration. The incidence of root galls was low for treated plants (0-60%) compared to controls (100%). The severity of the galls was significantly reduced by the extracts, however the extracts of T. diversifolia were the most effective. Extracts were more effective at low concentrations in improving agromorphological parameters of tomato, in contrast to the incidence and severity of galls which were reduced at high concentrations. Results suggest that these locally available plants could be used as biofertilizers and control method against root-knot nematodes.

Download Full-text