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| 1 | Chemical pre-treatments improve seed germination and seedling growth in Semecarpus kurzii:an ethnomedicinally important plant显示文摘Semecarpus kurzii Engl.is an important ethnomedicinal plant used for curing tumours,inflammation,fever and pain,and is also a source of iso ricinoleic acid.During the present investigation,effect of chemical pretreatments on germination and seedling growth revealed significant differences.Different pre-treatments could improve germination and treatment with KNO_3 (9.9 mM)was significantly superior(94%) to the untreated control(76%).Mean daily germination varied among the treatments(0.90–4.14 seeds per day),when compared with 2.27 seeds per day in control.Mean germination time was significantly reduced from 22.14 days(control) to 16.40 days(19.8 mM KNO_3) and 17.16 days(1.45 mM GA_3).Treatment with KNO_3(19.8 mM) and GA_3(1.45 and 2.90 mM)significantly reduced the time for 50% germination.Treatment with higher concentrations of GA_3 and KNO_3 exhibited significantly faster germination initiation(11.0 and 12.0 days,respectively) over the control(17.0 days).Seedling vigour index was not improved by pre-treatments.Chemical treatments did not improve shoot growth,collar thickness,or number of seedling leaves; however,root growth was significantly improved over control.Treatment with GA_3(2.90 mM) promoted leaf elongation but reduced leaf width significantly.Treatment with KNO_3 and GA_3 could be recommended to obtain healthy seedlings for establishing new plantations of this important medicinal plant species. | Ajit Arun Waman Pooja Bohra Avinash Norman | 2018 | Journal of Forestry Research2018，29，5： | 1 |
| 2 | Analysis of symbiotic microbial status of Atlantic sand dunes forest and its effects on Acacia gummifera and Retama monosperma(Fabaceae)to be used in reforestation显示文摘Atlantic forest natural soil flora was tested on two leguminous pioneer species Acacia gummifera and Retama monosperma to be used in rehabilitation programs of the coastal sand dunes forest of the Essaouira region.The rhizospheric soil of two endemic plant species:R.nonosperma and Juniperus phoenicea was sampled and split into two categories,one from native rhizospheric soil,the other of the sterilized rhizospheric soil.Investigation was focused on mycorrhizal formations,but other forms of beneficial symbiosis such as rhizobia and viable soil microflora were also studied.Growth and nutrition variables assessed included lengths of roots and shoots,number of branches,ratio of root to shoot dry mass and water,nitrogen and phosphorus levels.Results showed important mycorrhizal associations in roots of both plants,presence of nodules and abundance of viable soil microflora.J.phoenicea had a 100%frequency of mycorrhizal formation and an intensity of 80%compared to a frequency of 80%and intensity of 54%for R.monosperma.Nodules had the same density of CFU regardless of the origin.Abundance of viable microflora in rhisospheric soil of R.monosperma,J.phoenicea and the control differed significantly.Among the studied variables for A.gummifera and R.monosperma,nitrogen and phosphorus uptakes significantly wit the use of the nonsterilized rhizospheric soil.Both species doubled their phosphorus uptake when colonized by mycorrhizal species,R.monosperma doubled its nitrogen uptake and A.gummifera increased it by seven times compared with the control.No significant difference was noted for the other variables. | Abdessamad Fakhech Lahcen Ouahmane Mohamed Hafidi | 2020 | Journal of Forestry Research2020，31，4： | 0 |
| 3 | Pre-sowing treatments for improved germination and growth of two rare native species of Bangladesh显示文摘Pre-sowing treatments are expected to increase seed germination.This evaluates response to pre-sowing treatments and the growth performance of two native and rare tree species,Garuga pinnata Roxb.and Vitex glabrata R.Br.The hard seed coats were treated by rubbing with sand paper,nail clipping,and immersion in water and acid(H_2SO_4).Results indicate that G.pinnata showed a 90% germination rate and 30% germination energy when seed coats were nicked with a nail clipper.Rubbing with sand paper was the best pre-sowing treatment for V.glabrata,resulting a 80% germination rate and 30% germination energy.G.pinnata and V.glabrata seedlings from seeds soaked 24h in water resulted in maximum heights and collar diameters.These were significantly higher(at p<0.05) than those of other treatments.The results indicate that scarification or nicking of seeds may have some negative impacts on seedling growth.Therefore,it is difficult to recommend a pre-sowing treatment of seeds for achieving both maximum germination and good early seedling growth. | M.A.Hossain K.S.Islam N.Rajasree M.K.Hossain M.S.Alam | 2018 | Journal of Forestry Research2018，29，5： | 0 |
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