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

作　　者：Sélastique Doff ou Akaff ou AiméKouassi Kouame Nestor Bi Boh Gore Georges Yao Abessika Henri Kouadio Kouassi Perla Hamon Sylvie Sabatier Jerome Duminil 

机构地区：[1]Department for Seeds and Seedlings Production,Jean Lorougnon GuédéUniversity,BP 150,Daloa,Cote d’Ivoire [2]IRD,UMR DIADE,B.P.64501,34394 Montpellier Cedex 5,France [3]CIRAD,UMR AMAP,34398 Montpellier,France

出　　处：《Journal of Forestry Research》2021年第1期161-169,共9页林业研究（英文版）

摘　　要：The rapid rate of deforestation in Cote d’Ivoire has led to loss of plant species diversity and also threatens some commercial tree species with extinction.Some reforestation and aff orestation has been completed.However,for some species,the numbers of surviving transplants has declined.Hence,it is necessary to develop properly adapted and resilient genotypes that can eff ectively support the programs of forest restoration.In this context we evaluated the eff ects of the provenances of seeds and of various treatments on the germination rates and on plant growth of four commercial trees species(Pycnanthus angolensis,Terminalia superba,Mansonia altissima and Pterygota macrocarpa).We analyzed these parameters for seeds of three provenances(Daloa,Akoupéand Daoukro)of four species and for thirty plants aged 6 months per provenance.Time to begin germination and time to reach maximum germination were similar among species,and were not infl uenced by either treatment or provenance.Untreated seeds and those soaked for 24 and 48 h in water at room temperature yielded the highest germination rates,irrespective of species or provenance.The one exception was P.angolensis,for which no germination was recorded.Within species,some provenances produced higher germination percentages than did others.No clear relationship was computed between the germination rate and the morphometric characteristics of the seeds which varied signifi cantly between provenances.Plant growth and morphological variability also depended greatly on provenance.Genetic factors might be implicated,therefore provenance trials should be undertaken and evaluated.Furthermore,molecular analysis should be undertaken to confi rm the implications of genetic factors and allow for genetic selection.

关 键 词：Forest trees Seed germination Plant growth PROVENANCE Cote d’Ivoire 

分 类 号：S718.43[农业科学—林学]