GERMINATION STUDIES IN<i>TETRAPLEURA TETRAPTERA</i>

Onyekwelu, S. S. C.

doi:10.1080/01435698.1990.9752871

Cited by 7 publications

(7 citation statements)

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“…The effects of pre-treatment and media showed that higher percentages of seed germination were obtained when the variously pretreated seed were sown in the mixed than in the single media. The results agreed with those of earlier authors on pre-treatment of seeds (Onyekwelu, 1990) and on pre-treatment of seed and media (Mbakwe and Nzekwe, 2005;Baiyeri and Mbah, 2006;Nzekwe and Uju, 2008). In this study, seed pretreatment removed seed dormancy factor, while mixed media, by the virtue of their high water holding capacity created water vapour saturated atmosphere around the seeds, thus ensuring for regular water imbibitions by the seeds.…”

Section: Discussionsupporting

confidence: 92%

Effects of seed pre-treatment and media on seed germination and seedling growth of Iroko, Milicia excelsa (We/w.) C.C. Berg moraceae, Syn. Chlorophora excelsa

Nzekwe¹,

U²,

Ubani³

et al. 2013

Afr. J. Agric. Res.

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The effects of seeds pre-treatment and media, on germination of the seeds and seedling development of Iroko, Milicia excelsa, an important but threatened timber yielding species, were assessed. M. excelsa seeds extracted from the fruits that dropped from the trees were subjected to various pretreatments [(washing in tap water, (SB 1), washing in water and soaking for 15 min in hot water, 50° and 60°C, respectively (SB 3 and SB 4), washing in water, soaking in hot water 50 and 60°C, respectively, then left till hot water cooled (SB 4 and SB 6) and SB 1 , is the control,] before sowing in 6 different media; (garden soil (GS), sawdust (SD), 1:1 mixtute of GS + SD, GS + PD (Poultry droppings), SD + PD and 1:2:1 mixture of GS + PD + SD). Pre-treated seeds; SB 2 , SB 3 , SB 5 germinated within 2 weeks after sowing, the control, SB 1 germinated within 3weeks while SB 4 and SB 6 failed to germinate. GS + PD + SD medium consistently influenced the highest percentage germination responses. Within the pre-treated seeds SB 3 gave the highest percentage germination (92%) and the control, the least 63%, while SB 4 and SB 6 failed to germinate. Variations shown by mean values of some seedling aerial growth parameters showed that the best values were consistently obtained with seedling grown in GS + PD + SD medium. The study has shown that M. excelsa can be propagated by the seeds.

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Section: Discussionsupporting

confidence: 92%

Effects of seed pre-treatment and media on seed germination and seedling growth of Iroko, Milicia excelsa (We/w.) C.C. Berg moraceae, Syn. Chlorophora excelsa

Nzekwe¹,

U²,

Ubani³

et al. 2013

Afr. J. Agric. Res.

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“…This study indicated that mechanical and chemical scarification methods are effective in rendering seeds of Tetrapleura tetraptera permeable, leading to germination up to 90% after 6 days. This confirms the earlier reports of Onyekwelu [18] . A previous study by Lemos-Filho et al [19] showed that mechanical and chemical scarifications are more effective in breaking the hard seed coat of Senna multijuga.…”

Section: Discussionsupporting

confidence: 93%

“…The positive response to scarification observed in Tetrapleura tetraptera in this study, is typical of seeds with hard seed coat dormancy [17]. This kind of dormancy has been reported for many legumes [21] [22], including Tetrapleura tetraptera [18] [9].…”

Section: Discussionsupporting

confidence: 70%

Effect of different pretreatment protocols on seed germination of Tetrapleura tetraptera (Schum and Thonn)

Y.B¹

2012

IOSRJESTFT

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Tetrapleura tetraptera (Schum and Thonn) is a valued forest species in Nigeria for its medicinal and culinary uses. But the plant is uncultivated, and its seeds are dormant. This poses an obvious challenge in efforts aimed at its conservation. Different pretreatment protocols (scarification) were tested for their efficiency to break the hard seed coat of T. tetraptera. Mature fruits of T. tetraptera were collected from Oban west forest in Cross River State, and the seeds extracted and scarified before germination. Mechanical scarification was done by rubbing the seeds against a rough cement wall; chemical scarification by soaking the seeds in concentrated sulphuric acid, concentrated hydrochloric acid and concentrated nitric acid for 15 minutes; while heat scarification was done by soaking the seeds in hot water. Seed dormancy was successfully broken either by mechanical or chemical scarification. Significant difference (p<0.001) was observed in germination and imbibition percentage within the non-scarified and scarified seeds. While the non-scarified seeds had the least germination (18.3%), seed scarified with sulphuric acid had the highest (90%) followed by mechanically scarified seeds (85%) and nitric acid scarified seeds (81.7%). Imbibition percentage increased up to 100% in the scarified seeds in contrast to 66.6% in the non-scarified seeds. This study shows that sulphuric acid scarification is an effective method for breaking seed coat-imposed dormancy in Tetrapleura tetraptera.

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“…This study indicated that chemical scarification methods are effective in rendering seeds of S. stenocarpa permeable, leading to germination up to 90% after 6 days. This confirms the earlier reports of Onyekwelu (1990). A previous study by Lemos-Filho et al (1997) showed that mechanical and chemical scarifications are more effective in breaking the hard seed coat of Senna multijuga.…”

Section: Discussionsupporting

confidence: 91%

Germination Studies and Early Seedling Growth of Sphenostylis stenocarpa (Hochst. Ex A. Rich.) Harms Following Some Pretreatment Protocol for Enhanced Germination

2019

Aust. J. Basic & Appl. Sci

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Germination and early seedling growth of Sphenostylis stenocarpa were studied to determine the most effective method of breaking the seed coat-dormancy. Sphenostylis stenocarpa seeds were treated with concentrated sulphuric acid (H2SO4), nitric acid (HNO3), hydrochloric acid (HCl), nicking and hot water for 5, 10, 15 and 20 minutes. Chemical scarification with concentrated sulphuric acid at 5 seconds significantly (P<0.05) enhanced the germination and growth of Sphenostylis stenocarpa. The ratio of occurrence of small size (SS) to large size (LS) seeds Sphenostylis stenocarpa was 1:4. The small size seed has an average weight of 0.24 ± 0.05g while the large size seed has an average weight of 0.36 ± 0.08g. This study shows that sulphuric acid scarification is an effective method for breaking seed coat-imposed dormancy in Sphenostylis stenocarpa

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GERMINATION STUDIES INTETRAPLEURA TETRAPTERA

Cited by 7 publications

References 1 publication

Effects of seed pre-treatment and media on seed germination and seedling growth of Iroko, Milicia excelsa (We/w.) C.C. Berg moraceae, Syn. Chlorophora excelsa

Effects of seed pre-treatment and media on seed germination and seedling growth of Iroko, Milicia excelsa (We/w.) C.C. Berg moraceae, Syn. Chlorophora excelsa

Effect of different pretreatment protocols on seed germination of Tetrapleura tetraptera (Schum and Thonn)

Germination Studies and Early Seedling Growth of Sphenostylis stenocarpa (Hochst. Ex A. Rich.) Harms Following Some Pretreatment Protocol for Enhanced Germination

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