Seed germination of seven Sahelian legume species

Sy, Abou; Grouzis, Michel; Danthu, Pascal

doi:10.1006/jare.2001.0818

Cited by 59 publications

(38 citation statements)

References 10 publications

(10 reference statements)

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“…Hard seed coats of Acacia species cause physical seed dormancy which may delay and reduce seed germination [15,16,3] . The presence of hard seed coat in Acacia species interfere with water imbibition causing a reduction in seed germination [17] .…”

Section: Resultsmentioning

confidence: 99%

Effect of Bruchid Beetles (Burchidius Arabicus Decelle) Infestation on the Germination of Acacia tortilis (Forssk.) Hayne) Seeds

Ahmed¹

2008

American J. of Environmental Sciences

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Abstract:The role of bruchid beetle infestation on seed germination of Acacia tortilis (Forssk.) Hayne) Mimosaceae under different incubation temperatures and degrees of scarification was studied under controlled conditions. Results indicate that seed germination was highest (96%) in scarified seeds at 25-35ºC incubation temperature, whereas, it was only 28% in intact seeds. Seeds infected by bruchid beetles with one or two holes did not germinate regardless of different incubation temperatures. X-ray results of A. tortilis seeds showed substantial consumption of endosperm and embryonic portions by the bruchid beetles resulting in one or two holes in the infected seeds curtailing seed germination. A unique method of identifying seed viability of A. tortilis by X-ray studies is reported.

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Section: Resultsmentioning

confidence: 99%

Effect of Bruchid Beetles (Burchidius Arabicus Decelle) Infestation on the Germination of Acacia tortilis (Forssk.) Hayne) Seeds

Ahmed¹

2008

American J. of Environmental Sciences

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“…He added that prolonged exposures to SA may be detrimental to seeds as the acid may damage vital parts of the embryo. All species (other than Cassia obtusifolia), including T. purpurea, had strong integumental inhibition which was easily eliminated by mechanical scarification or immersion in concentrated Sulfuric acid (Sy et al, 2001). Crotalaria ochroleuca had emergence rates above 15% compared with <10% for T. radicans (Tauro et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

A Quantitative Assessment of Germination Parameters: the Case of and

Al-Ansari¹,

Ksiksi²

2016

Open Ecol. J.

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Abstract:The present investigation attempted to assess the impact of seed pre-treatments on the germination of Crotalaria persica (Burm. f.) Merr and Tephrosia apollinea (L) Pers. Equally important was our investigation to quantitatively compare different germination parameters used for seed germination studies. The results showed that the final germination was highest for both species under chipping (CHIP), sand paper (SP) and 20 to 90 minutes in concentrated sulfuric acid (SA20 to SA90). Rubbing in sand (SAND) and water-soaking (SOAK) showed lower germination percentages. Mean germination time (MGT) was highest after 50 minutes in sulfuric acid (SA50) for both C. persica and T. apollinea. The coefficient of velocity of germination (CVG) was highest when seeds were treated with sulfuric acid during 30 minutes (SA30) for C. persica (56.1%) and during 60 minutes (SA60) for T. apollinea (66.8%). For the germination index (GI), chipping and all SA exposures (except 90 minutes) revealed high means for both C. persica and T. apollinea, while SP also resulted in high germination index for C. persica. The mean rate of seed germination was highest under sand rubbing and distilled water (0.9 and 0.8, respectively) for C. persica and under SA20 (1.3), for T. apollinea. The germination rate index (GRI) for C. persica was highest under CHIP, SP, and SA20 to SA60. Timson Germination Index (TGI) showed high values for most pre-treatments.The highest TGI recorded was 45.6% for SA30. As for the correlation between the germination parameters, it is recommended that final germination percent coupled with germination index are used as germination parameters. They do not require complex calculations, while they complement each other in giving a representative evaluation of seed germination.

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“…Conformément à nos observations et à celles faites par Werker (1980Werker ( -1981, Hanna (1984), Cavanagh (1987), Sy et al (2001), Le Floc'h & Grouzis (2003 sur certaines légu-mineuses, cette absence de germination peut s'expliquer par la dureté des téguments des graines empêchant ainsi le développement de l'embryon et l'émergence de la radicule. En effet, le recours dans notre travail à la scarification chimique a permis le ramollissement des téguments des graines de R. monosperma en favorisant la germination.…”

Section: B Discussionunclassified

“…Des prétraitements d'une durée supé-rieure à 8 h se sont révélés destructifs. L'efficacité de ce prétraitement sur la levée de l'inhibition tégumentaire de certaines légumineuses du sahel est vérifiée dans les travaux de Sy et al (2001).…”

Section: B Discussionunclassified

Effets de quelques prétraitements physico—chimiques sur la levée de l'inhibition tégumentaire des graines deRetama monospermaBoiss. et recherches des conditions thermiques optimales de germination

Bouredja¹,

Mehdadi²,

Bendimered³

et al. 2011

Acta Botanica Gallica

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Résumé.-Les graines de Retama monosperma sont affectées d'une inhibition tégumentaire qui empêche leur germination dans les conditions naturelles. Au laboratoire, cette germination est déclenchée après scarification chimique des graines par l'acide sulfurique pur, dans une gamme de températures se situant entre 10 °C et 30 °C. L'analyse en composantes principales des données relatives aux capacités de germination, aux coefficients de vélocité et aux temps de latence obtenus, après prétraitement à l'acide sulfurique pendant 4, 6 et 8 heures, aux différentes températures testées, montrent que l'optimum thermique de germination se situe entre 20 °C et 25 °C. En effet, à ces deux températures, nous avons enregistré les meilleurs coefficients de vélocité (23.25% à 31.81%), les capacités de germination (72% à 92%) et les temps de latence les plus courts (1 à 2 jours).Mots clés : germination -scarification chimique -Retama monosperma -inhibition tégumentaire.Abstract.-Seeds of Retama monosperma are affected by integumentary inhibition preventing their germination in the natural conditions. In the laboratory, the germination is triggered after chemical scarification of seeds by undiluted sulfuric acid, in a range of temperatures, between 10 °C and 30 °C. The principal component analysis of data relating to the capacity of germination, coefficients of velocity and latency time obtained after pretreatment with sulfuric acid for 4, 6 and 8 hours, tested at different temperatures, show that the optimum thermal germination is between 20 °C and 25 °C. Indeed, at these two temperatures, we recorded the best coefficients of velocity (23.25% to 31.81%), germination capacity (72% to 92%) and the shortest latency time (1 to 2 days).

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Seed germination of seven Sahelian legume species

Cited by 59 publications

References 10 publications

Effect of Bruchid Beetles (Burchidius Arabicus Decelle) Infestation on the Germination of Acacia tortilis (Forssk.) Hayne) Seeds

Effect of Bruchid Beetles (Burchidius Arabicus Decelle) Infestation on the Germination of Acacia tortilis (Forssk.) Hayne) Seeds

A Quantitative Assessment of Germination Parameters: the Case of and

Effets de quelques prétraitements physico—chimiques sur la levée de l'inhibition tégumentaire des graines deRetama monospermaBoiss. et recherches des conditions thermiques optimales de germination

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