scholarly journals Effect of pretreatments on germination of seeds of the timber plant, Terminalia ivorensis and Mansonnia altissima (A. Chev.)

2020 ◽  
Vol 12 (2) ◽  
pp. 334-340
Author(s):  
Peter J. CHIKA ◽  
Ayobola M. SAKPERE ◽  
Michael S. AKINROPO
Keyword(s):  
Treatment Group ◽  
Analysis Of Variance ◽  
Hot Water ◽  
High Humidity ◽  
Percentage Germination ◽  
River Sand ◽  
Forest Reserve ◽  
Tropical Timber ◽  
Timber Tree

Terminalia ivorensis and Mansonnia altissima is an important tropical timber tree plant, but poor germination is an important factor militating its regeneration. Effects of pretreatments on germination of seeds of Terminalia ivorensis and Mansonia altissima were studied. Four hundered and eighty matured seeds of Terminalia ivorensis and three hundred and sixty seeds of Mansonia altissima were obtained from Forest Reserve Institute of Nigeria (FRIN), Ibadan. The seeds were divided into twenty-one equal portions of 10 seeds each. Twelve pretreatments were investigated on Terminalia ivorensis and nine pretreatments on Mansonia altissima. The seeds were sown inside plastic basket containing sterilized river sand under high humidity propagator with four replicates each. Germination counts were taken daily for eighty days. Percentage germination was computed for each treatment and the data were subjected to analysis of variance. Germination was first observed among the scarified Terminalia ivorensis seeds at 14 days after sowing (DAS) and this treatment group had the highest percentage germination of 82.5%, while seeds soaked in hot water recorded the least germination. Germination was first observed in decoated Mansonia altissima and this treatment group had the highest percentage germination of 45%, whereas the least was observed among the treatments with H­2SO4. The effect of pretreatment was highly significant (p≤0.05) on the germination of both species. It is therefore recommended that mechanical scarification of Terminalia ivorensis and decoating seed of Mansonia altissima will enhance the germination of the two species.

Pattern in a derived savanna in Nigeria

1991 ◽  
Vol 7 (4) ◽  
pp. 491-502 ◽  
Author(s):  
P. Greig-Smith
Keyword(s):  
Analysis Of Variance ◽  
Block Size ◽  
Basal Area ◽  
Species Density ◽  
Forest Reserve ◽  
South West ◽  
Derived Savanna ◽  
Woody Growth

ABSTRACTAll woody growth was enumerated in three transects, each 960 m x 20 m, in derived savanna in the Olokemeji Forest Reserve in south-west Nigeria. The data for species density, species basal area and stem girth classes were analysed by nested-block analysis of variance and covariance. The use of ‘total covariance’, the sum of all covariances at a block size, contributes to understanding of the pattern present.Three scales of pattern were evident. Patchiness at 160–320 m is interpreted as a response to soil differences or to the pattern of previous farming, which may itself have been determined by soil differences. Patchiness at 20–40 m is attributable to varying intensity of burning. At the smallest scale, of 10 m, there is evidence of regularity of distribution resulting from interference between individuals, possibly due to competition for water.

scholarly journals Speciation slowing down in widespread and long-living tree taxa: insights from the tropical timber tree genus Milicia (Moraceae)

Heredity ◽  
2014 ◽  
Vol 113 (1) ◽  
pp. 74-85 ◽  
Author(s):  
K Daïnou ◽  
G Mahy ◽  
J Duminil ◽  
C W Dick ◽  
J-L Doucet ◽  
...  
Keyword(s):  
Living Tree ◽  
Tropical Timber ◽  
Slowing Down ◽  
Timber Tree

scholarly journals Identifying dormancy class and storage behaviour of champak (Magnolia champaca) seeds, an important tropical timber tree

2013 ◽  
Vol 41 (2) ◽  
pp. 141 ◽  
Author(s):  
M Thilina R Fernando ◽  
KMG Gehan Jayasuriya ◽  
Jeffrey L Walck ◽  
ASTB Wijetunga
Keyword(s):  
Tropical Timber ◽  
Timber Tree ◽  
And Storage

STUDIES OF THE AGING OF CONIDIA OF MONILINIA FRUCTICOLA (WINT.) HONEY: I.GERMINATION RATES AND LONGEVITY

1957 ◽  
Vol 35 (5) ◽  
pp. 635-645 ◽  
Author(s):  
S. H. Z. Naqvi ◽  
H. M. Good
Keyword(s):  
Relative Humidity ◽  
Storage Temperature ◽  
Potato Dextrose Agar ◽  
Monilinia Fructicola ◽  
High Humidity ◽  
Percentage Germination ◽  
Low Humidity ◽  
Nutrient Solutions

Conidia of Monilinia fructicola (Wint.) Honey were stored 1–10 months at temperatures of 5°, 25°, and 35 °C. and at constant relative humidities approximating 0, 15, 45, 75, and 90%. The germination of these spores was tested on potato dextrose agar containing 6% glucose, and curves of the percentage germination against time are given for representative samples.A pronounced delay in germination developed under all conditions of storage. The rate at which this delay developed was virtually independent of the storage temperature. All spore samples gave 100% germination after 3 months but only those at 5 °C. gave; any germination after 10 months. Storage in a relative humidity of 75% gave the best preservation of spore vigor, there being evidence in other conditions of either high humidity or low humidity injury. Of the nutrient solutions tested, glucose was the only one which gave substantially better germination than water, the effect being most marked on spores stored for some months at high humidity. With glucose, such spores sometimes germinated faster than those stored at intermediate humidities.

scholarly journals Draft genome of a high value tropical timber tree, Teak (Tectona grandis L. f): insights into SSR diversity, phylogeny and conservation

DNA Research ◽  
2018 ◽  
Vol 25 (4) ◽  
pp. 409-419 ◽  
Author(s):  
Ramasamy Yasodha ◽  
Ramesh Vasudeva ◽  
Swathi Balakrishnan ◽  
Ambothi Rathnasamy Sakthi ◽  
Nicodemus Abel ◽  
...  
Keyword(s):  
Draft Genome ◽  
Tectona Grandis ◽  
Tropical Timber ◽  
Timber Tree

scholarly journals Effects of pretreatment and drying temperature on antioxidants and antinutrients of Justicia insularis and Jatropha tanjorensis leaves

2021 ◽  
Vol 46 (3) ◽  
pp. 74-88
Author(s):  
Mfrekemfon Akpan ◽  
Ubong Assian ◽  
Elijah Ikrang
Keyword(s):  
Antioxidant Activity ◽  
Analysis Of Variance ◽  
Hydrogen Cyanide ◽  
Salt Water ◽  
Hot Water ◽  
Leafy Vegetables ◽  
Interactive Effects ◽  
Probability Level ◽  
Fresh Sample ◽  
Hot Air

Antioxidants and antinutrient contents of leafy vegetables may be influenced by post-harvest processing. The present study was carried out to assess the effect of pretreatments (P) and drying temperatures (T) on antioxidants and antinutrients of Justicia insularis and Jatropha tanjorensis leaves. Four groups of samples were prepared, namely: fresh sample (FR), UN-blanched and dried sample (UB), sample blanched in hot water and dried (BHW) and sample blanched in salt water and dried (BSW). Drying was conducted at 40 0C, 50 0C and 60 0C using hot air oven. Antioxidants and antinutrients of the samples were determined. The data collected were subjected to a two-way Analysis of Variance (ANOVA) as well as Dunnett t-test at 5% probability level. Based on the results, BHW between 500 C and 600 C increased the antioxidant activity in both vegetables. BHW 60 0C was able to reduce oxalate and phytate contents to reasonable level while BSW50 0C drastically decreased hydrogen cyanide and tannin contents. However, the overall, individualistic, and interactive effects of P and T had significant ( < 0.05) influence on majority of antioxidant activity and antinutrient contents in both vegetables.

scholarly journals Potensi Infusa Kemiri (Aleurites moluccana) sebagai Analgesik dan Stimulator Stamina

2021 ◽  
Vol 9 (1) ◽  
pp. 14-20
Author(s):  
Fajar Anaba ◽  
Andriyanto ◽  
Ni Luh Putu Ika Mayasari
Keyword(s):  
Analysis Of Variance ◽  
Water Immersion ◽  
Hot Water ◽  
Tail Flick ◽  
Tail Flick Test ◽  
Aleurites Moluccana ◽  
Hot Water Immersion

Kesehatan merupakan hal penting untuk menjalankan aktivitas sehari-hari. Penurunan kesehatan dan daya tahan tubuh mengakibatkan timbul rasa nyeri serta mudah terserang penyakit. Pengobatan herbal digunakan sebagai pengobatan alternatif yang lebih aman dan terjangkau dibandingkan pengobatan nonherbal dari bahan-bahan kimia. Kemiri merupakan salah satu tanaman herbal yang memiliki banyak khasiat dan sering digunakan sebagai pengobatan oleh masyarakat. Penelitian ini bertujuan mempelajari efektivitas infusa kemiri sebagai analgesik dan stimulator stamina dalam berbagai dosis pada mencit. Uji efektivitas analgesik ditinjau menggunakan metode hot water immersion tail-flick test dan uji efektivitas stamina menggunakan metode natatory enhausen. Penelitian ini menggunakan 20 ekor mencit jantan yang dikelompokkan menjadi kelompok kontrol dan kelompok perlakuan yang diberi infusa kemiri dengan dosis 1, 2, dan 4 g/kg BB. Setiap kelompok terdiri atas 5 ekor. Data dianalisis menggunakan analysis of variance (ANOVA) kemudian dilanjutkan dengan uji Tukey. Hasil penelitian didapatkan dosis efektif pada uji analgesik adalah 4 g/kg BB dengan waktu respons nyeri ekor terlama yaitu 7.840±0.477 detik dan pada uji stamina adalah 1 g/kg BB yang ditunjukkan dengan durasi berenang terlama yaitu 145.00±20.65 detik. Kemiri memiliki efektivitas terhadap analgesik dan stimulator stamina.

scholarly journals Propuesta de evaluación para asignar tentativamente riesgo de extinción (ETRE): el caso de Peltogyne mexicana (Leguminosae)

2018 ◽  
Vol 96 (4) ◽  
pp. 609
Author(s):  
Juan Carlos Montero-Castro ◽  
José Antonio Zuñiga-Zuñiga ◽  
Cuauhtémoc Sáenz-Romero ◽  
Nahum Modesto Sánchez-Vargas
Keyword(s):  
Extinction Risk ◽  
Distribution Area ◽  
Risk Category ◽  
Species At Risk ◽  
Tropical Timber ◽  
Risk Of Extinction ◽  
Timber Tree ◽  
Speed Up ◽  
Risk Situation ◽  
Method Of Evaluation

<p><strong>Background</strong>: The rates of extinction evaluations are slow in relation to the magnitude of the problem. In the case of plants, just about 6 % of the species have been evaluated. On the other hand, it has been determined that the extension of the distribution area is a good predictor of the extinction risk.</p><p><strong>Questions</strong>: Is it possible to speed up the estimate of extinction risk of plant species? Can risk estimates that consider only the area of distribution converge with estimates from already established methods?</p><p><strong>Taxon</strong>: <em>Peltogyne mexicana</em></p><p><strong>Study</strong> <strong>site</strong>: Guerrero, Mexico</p><p><strong>Methods</strong>: The Evaluation to Assign Tentatively Risk of Extinction (ETRE) was implemented comparing the area of occurrence (AOO), calculated with the GeoCat program, of the tropical timber tree <em>Peltogyne mexicana</em> against the AOO of other tropical trees (all Leguminosae) that are recognized with risk of extinction. The Method of Evaluation of Species at Risk (MER) was implemented and the results were compared.</p><p><strong>Results</strong>: With the implementation of the ETRE it was determined that <em>Peltogyne mexicana</em> has a high extinction risk, category that is confirmed with the MER implementation.</p><strong>Discussion</strong>: The suitability of the ETRE is based on the fact that several predictors of the risk of extinction are dependent on the size of the distribution area and that the estimate of the distribution area is amply accepted through the AOO. The ETRE is impartial, easily replicable, which can be implemented previously to evaluations more scrupulous, such as the MER. Actions are suggested to alleviate the risk situation of <em>Peltogyne mexicana</em>.

scholarly journals Multiple Shoot Production In Vitro of the Tropical Timber Tree, Sentang (Azadirachta excelsa Linn.)

HortScience ◽  
1998 ◽  
Vol 33 (6) ◽  
pp. 1073-1075 ◽  
Author(s):  
T.K. Liew ◽  
C.K.H. Teo
Keyword(s):  
Sodium Hypochlorite ◽  
Multiple Shoot ◽  
Axillary Buds ◽  
Naphthaleneacetic Acid ◽  
Ms Medium ◽  
Tropical Timber ◽  
Shoot Production ◽  
Timber Tree

Axillary buds from 5-month-old seedlings of Azadirachta excelsa Linn. were surface-sterilized twice with 1.35% (m/v) and 1.05% (m/v) of sodium hypochlorite for 25 and 15 minutes, respectively, before culturing on Murashige and Skoog (MS) medium containing combinations of BA and NAA. A combination of 4.4 μM BA + 0.5 μM NAA induced the most axillary buds to grow (eight per explant). Subsequent proliferation of the micropropagated shoots on this medium yielded abnormal shoots. The best medium for maximum proliferation of these micropropagated shoots contained 3.3 μM BA and 0.27 μM NAA. On this medium about four normal shoots were produced per explant. These findings indicate that two different media are needed for successful micropropagation of sentang. Chemical names used: N6-benzylaminopurine (BA); 1-naphthaleneacetic acid (NAA).

Effect of Seed Treatments on Germination in Acacia

1977 ◽  
Vol 25 (3) ◽  
pp. 269 ◽  
Author(s):  
J Clemens ◽  
PG Jones ◽  
NH Gilbert
Keyword(s):  
Water Treatment ◽  
Germination Rate ◽  
Hot Water ◽  
Practical Significance ◽  
Hot Water Treatment ◽  
Percentage Germination ◽  
Single Treatment ◽  
Seed Mortality ◽  
Different Temperatures ◽  
Time Periods

The germination of seed of five Acacia spp. was studied following a manual chipping treatment or exposure to water held at different temperatures for discrete time periods. Response was evaluated on the basis of the final percentage germination, and estimates of rate of germination and time taken for germination to commence. There were differences in response of the species to hot water sufficiently large to be of practical significance. No single treatment gave optimum germination in all species. Increasing severity of treatment improved germination rate and percentage germination up to a point where seed mortality became apparent. Manual chipping of the seed gave larger improvements in germination rate, and the seeds began to germinate faster than those given any hot water treatment. However, in some species germination percentages were lower in chipped seeds than in those treated with hot water.

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