Effet de l’intensité d’ensoleillement sur la croissance initiale en pépinière de Guibourtia ehie (A. Chev.) Leonard (Caesalpiniaceae), espèce couramment exploitée et menacée d’extinction, dans l’Unité de Gestion Forestière de Bossematié (Côte d’Ivoire)

Kouadio, K; Dibi, Hyppolite N’da; Bomisso, L; Ettien, Rbk

doi:10.4314/ijbcs.v7i6.10

Int. J. Bio. Chem. Sci

2014

DOI: 10.4314/ijbcs.v7i6.10

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Effet de l’intensité d’ensoleillement sur la croissance initiale en pépinière de Guibourtia ehie (A. Chev.) Leonard (Caesalpiniaceae), espèce couramment exploitée et menacée d’extinction, dans l’Unité de Gestion Forestière de Bossematié (Côte d’Ivoire)

K Kouadio¹,

Hyppolite N’da Dibi²,

L Bomisso³

et al.

Abstract: RESUMEUne étude sur la croissance en pépinière de Guibourtia ehie (Caesalpiniaceae), en fonction de l'intensité de l'ensoleillement, a été réalisée dans l'Unité de Gestion Forestière de Bossematié. Le principal objectif est de contribuer à accroître les connaissances sur la croissance initiale de Guibourtia ehie (Caesalpiniaceae), espèce surexploitée et menacée d'extinction, afin de l'utiliser dans les programmes de reboisement des forêts ivoiriennes. L'étude est basée sur l'observation de la dynamique de croi… Show more

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Ecophysiology of <i>Lophira lanceolata</i> Seeds Germination and Conservation Perspectives

Dicko¹,

Fandohan²,

Natta³

2022

AJPS

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Lophira lanceolata is a multi-purpose woody plant species used by local populations in Benin. Its seeds are used for the manufacture of edible vegetable oil and also for medicinal care. However, reproduction by seed of this plant species is compromised not only by the multiple uses made of the seeds, but also by the difficulties of germination in the natural environment. Several ecological factors could explain this difficulty of germination. In this study, we investigated the species seeds ecophysiology in order to develop seedlings production techniques for its reintroduction. Beta regression was performed to test the effect of water, light and provenance on seeds germination rate. The germination speed was expressed as the median germination time. The results showed that the germination rate was better under light conditions (β = 0.77674 ± 0.14954, Z = 5.194, p < 0.0000). The germination rate decreased as the frequency of watering increased (β = −0.28222 ± 0.14809, Z = −1.906, p = 0.0567). The best provenance was the phytodistrict of Atacora chain. The cumulative germination rate reached 50% after 54 days for seeds collected from Atacora chain and after 57 days under light conditions. Regarding the level of watering, the germination rate remained below 50% regardless the treatment. The germination speed was higher for seeds collected from Atacora chain and that have germinated under light conditions and watered twice a week. For the sustainable management of L. lanceolata, domestication by establishment of plantations by rural communities is recommended based on seeds from Atacora chain.

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Ecophysiology of <i>Lophira lanceolata</i> Seeds Germination and Conservation Perspectives

Dicko¹,

Fandohan²,

Natta³

2022

AJPS

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Qualités germinatives des graines et croissance des plantules de Isoberlinia spp. en milieu contrôlé (pépinière)

Silue¹,

Kouassi²,

Koffi³

et al. 2017

Int. J. Bio. Chem. Sci

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; Tél : (+225) 07 79 14 31. RESUME Le genre Isoberlinia appartient à la famille des Caesalpiniaceae et comprend deux espèces forestières bien représentées dans les formations végétales du Nord de la Côte d'Ivoire. La présente étude vise à renforcer les informations de bases sur la domestication de ce genre. Deux milieux (milieu ombragé, milieu ouvert) abritant chacun des graines mises à germer suivant un dispositif en bloc randomisé à 100 unités expérimentales et des plantules issues de graines et de stumps ont été installés. Les observations de germination et des mesures sur la croissance des plantules y ont été régulièrement effectuées. Au terme des essais, le milieu ombragé a enregistré les meilleurs paramètres de germination avec un taux de germination de 96,80% et un temps de latence relativement court de 7 jours. En outre, la conservation des graines au réfrigérateur à 7 °C durant 5 semaines a permis de maintenir leur pouvoir germinatif alors que leur conservation à la température ambiante a entrainé une baisse d'au moins 60% de leur teneur en eau et une perte significative de leur pouvoir germinatif. Le sol à texture sableuse a permis d'obtenir les meilleurs paramètres de germination de même que les semis effectués à une profondeur inférieure à 3 cm. La croissance des jeunes plants issus de Germinating qualities of seeds and seedlings growth of Isoberlinia spp. in a controlled environment (seedbed) ABSTRACT Isoberlinia spp. is a species of the family Caesalpiniaceae and a forest essence well represented in the plant formations of the North of Cote d'Ivoire. The target of this study is to evaluate the effect of abiotic factors on seed germination and the initial growth of seedlings of the genus Isoberlinia. Two environments (shaded P. A. SILUE et al. / Int. J. Biol. Chem. Sci. 11(1): 93-106, 2017 94 environment, open environment) sheltering each seed germinated according to a randomized block device with 100 experimental units and seedlings from seeds and stumps were installed. The germination observations were regularly carried out as well as growth measurements on the seedlings. The results show that the intensity of the light has a significant influence on the germination parameters with a higher germination rate (96.80%) and a relatively short latency (7 days) in a shaded environment. When the seeds are stored at ambient temperature, their water content decreases by at least 60% after 3 weeks, leading to a significant loss of germinative power. Such seeds, called recalcitrant seeds, retain about 70% of their water content and present values of germination parameters close to those of freshly harvested seeds when stored in the refrigerator at 7 °C during 5 weeks. A soil with a sandy texture makes it possible to obtain the best germination results but the seedlings must be done at a depth of less than 3 cm at the risk of influencing the germination rate significantly. In addition, the study showed that the growth of young plants of Isoberlinia spp of the two types of experimentation is slow compar...

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Effet de l’intensité d’ensoleillement sur la croissance initiale en pépinière de Guibourtia ehie (A. Chev.) Leonard (Caesalpiniaceae), espèce couramment exploitée et menacée d’extinction, dans l’Unité de Gestion Forestière de Bossematié (Côte d’Ivoire)

Cited by 2 publications

References 3 publications

Ecophysiology of <i>Lophira lanceolata</i> Seeds Germination and Conservation Perspectives

Ecophysiology of <i>Lophira lanceolata</i> Seeds Germination and Conservation Perspectives

Qualités germinatives des graines et croissance des plantules de Isoberlinia spp. en milieu contrôlé (pépinière)

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Effet de l’intensité d’ensoleillement sur la croissance initiale en pépinière de Guibourtia ehie (A. Chev.) Leonard (Caesalpiniaceae), espèce couramment exploitée et menacée d’extinction, dans l’Unité de Gestion Forestière de Bossematié (Côte d’Ivoire)

Cited by 2 publications

References 3 publications

Ecophysiology of &lt;i&gt;Lophira lanceolata&lt;/i&gt; Seeds Germination and Conservation Perspectives

Ecophysiology of &lt;i&gt;Lophira lanceolata&lt;/i&gt; Seeds Germination and Conservation Perspectives

Qualités germinatives des graines et croissance des plantules de Isoberlinia spp. en milieu contrôlé (pépinière)

Contact Info

Product

Resources

About

Ecophysiology of <i>Lophira lanceolata</i> Seeds Germination and Conservation Perspectives

Ecophysiology of <i>Lophira lanceolata</i> Seeds Germination and Conservation Perspectives