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Effects of Scarification and Substrates on Seed Germination Quality for Domestication of Stereospermum kunthianum(Bignoniaceae)

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Journal of Environmental Science and Engineering(B) 2023年第6期12卷 280-288页

作者： Beunon Tchimbi aziber hamza ousman Sabre Idriss Absakine Anjah Gâce Mendi BéréNangndi Department of Plant Biology Faculty of SciencesUniversity of DschangBP 67DschangCameroon Department of Life and Earth Sciences Ecole Normale Supérieure de N'DjamenaBP 460N’DjamenaChad Department of Life and Earth Science Faculty of ScienceUniversity of DobaBP 03DobaChad

The demand for medicinal plants at the origin of phyto-drugs,like all ethnobotanical plants,threatens their existence *** aim of this work was to determine suitable methods for optimizing the possibilities of regenerating Stereospermum *** achieve this objective,3 levels of mechanical scarification(light scarification,medium scarification and deep scarification)were applied to the seeds of this species using a rough instrument,and 5 days after germination,the seedlings were transplanted into 5 types of substrate to study their effects on seedling *** length of the seedlings was measured using a graduated *** results obtained showed that the best latency time was 2 days for average seed *** highest germination half-time was 4.00±0.06 days observed for average seed scarification,the highest germination speed was 22.50±1.00 and the highest germination rate was 100.00%±0.00%for average *** homogeneous substrate mixes black earth/woodsilk and Fine sand/woodsilk were more effective for seedling growth(1.9 cm/day in the juvenile state)and *** seed scarification is the most effective method for regenerating Stereospermum kunthianum,and the black earth/wood shavings substrate mix is the best for its cultivation.

关键词： Scarification substrate germination domestication Stereospermum kunthianum

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Impact of Pretreatment on the Germinative Characters of Seeds of Stereospermum kunthianum Cham. (Bignonaceae) for Its Domestication in Chad

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Open Journal of Ecology 2023年第2期13卷 49-60页

作者： Beunon Tchimbi Sabre Idriss Absakine Anjha Grâce Mendi hamza ousmane aziber Department of Life and Earth Sciences Higher Teachers’ Training College of N’Djamena N’Djamena Chad Department of Plant Biology Faculty of Sciences University of Dschang Dschang Cameroon

The objective of this research is to lift the dormancy of seeds of S. kunthianum in with a view to domesticating them. In this experiment, we used the soaking of seeds in sulfuric acid for different durations (10 min, 30 min and 1 h). The treated seeds were sown in transparent germinators. The explants obtained were then transplanted into pots containing five types of substrate (black earth, fine sand, sawdust, mixtures 1/1 of sawdust/black earth and 1/1 of sawdust/fine sand). This second test made it possible to determine the rate of germination on the substrate. The results obtained compared to those of the control showed a clear reduction in the latency time or germination time (62 hours) instead of 6 days (control), in the germination time 3 days/7 days (control) and a very high germination rate (100%). At the 5% threshold, soaking for 10 min and 30 min (100%) is the best result on the germination of S. kunthianum seeds. Soaking for 1 hour gives (7%) very low. After transplantation of the explants, the percentages obtained independently of the treatments show that the 1/1 mixtures of sawdust/black earth (75.19%), black earth (73.33%) and sawdust/fine sand (66.30%) have a higher performance than the others. The type of germination is epigeal. This work makes it possible to domesticate S. kunthianum in Chad.

关键词： Stereospermum kunthianum Treatment Substrate Germination Medicinal Plant and Chad

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