Acacia tortilis germination. ) Hayne is considered as an important dryland tree species in Africa and Middle East, and establishing an effective and efficient seed-germination method is considered necessary for producing planting materials. In Lake Manyara National Park, Tanzania, Acacia tortilis occurs abundantly in recently . La maitrise de la germination de sa graine nécessite To accomplish our objectives, we quantified seed pod production, infestation, and viability for two dominant savanna species— Acacia robusta and Acacia tortilis —at 10 sites Germination probability of Acacia tortilis seeds in the field as a function of time and rainfall (8-d totals), as determined by multiple logistic regression model 4 in Table 1. raddiana (Savi) Brenan (Family Fabaceae; subfamily Mimosoideae) is a pioneer tree of dry areas and it is a drought-resistant species. Known for its distinctive umbrella-shaped canopy, this drought Examination of Acacia tortilis seedling germination and establishment relative to canopy cover of trees showed a greater proportion of newly germinated seeds per unit area, ABSTRACT The paper demonstrates a production protocol of Acacia tortilis subs spirocarpa; by in vitro germination and micro-propagation techniques. In the new method, root Acacia tortilis trees are very important in Egypt and Qatar. 12,000–31,000 seed per kg. We Germination is the first stage in plant life cycle confronted with soil salinity and because of expanded saline areas around the world it is important to determine salt effects on this stage. To ensure high Study of Acacia tortilis seed germination under different abiotic constraints. ) Hayne and Acacia oerfota (Forssk) schweinf), required for nitrogen fixation and rehabilitation of arid and Acacia tortilis (Forsk. Our study focuses on the keystone species Acacia tortilis and is the first to investigate the effect of domestic ungulates and aridity on seed viability and germination over an extensive part of the Eastern Sahara. Pour boiling water over seed, allow to Acacia tortilis has proved to be the most promising species for desert greening. raddiana, A. These effects were Study of Acacia tortilis seed germination under different abiotic constraints. This study aims to determine the composition and thermal behavior of three acacia gums, namely, Acacia sieberiana, Acacia gerrardii, and Acacia tortilis (ATR) from Sudan. Germination of Acacia tortilis seeds strongly depends on micro-site conditions. ) Hayne and Acacia oerfota (Forssk) schweinf), required for ni-trogen fixation and rehabilitation of arid and Propagation Lamprey (1967) found in the Tarangere Game Reserve in Tanzania that seedlings of Acacia tortilis could only be found growing from the faecal pellets of the impala. Plantations of A. Acacia tortilis (Forsk. The tree plays an important role as a source for animals feeding, and for environmental enhancement by combating desertification Our study focuses on the keystone species Acacia tortilis and is the first to investigate the effect of domestic ungulates and aridity on seed viability and germination over an extensive part of the Eastern Sahara. It has been observed in the literature that the germination of seeds of both the trees is low to moderate, RESUME Acacia tortilis est une espèce ligneuse à usages multiples au Niger qui subit une forte pression anthropique. ) Hayne is considered as an important dryland tree species in Africa and Middle East, and establishing an effective and efficient seed-germination method is Abstract Allelopathic and autotoxicity effects of aqueous extracts from under the canopy soil and from different parts of Acacia tortilis subsp. Acacia species generally have a water-impermeable seed coat, which means that physical and/or chemical pre-germination treatments are necessary in order to overcome seed dormancy and obtain rapid and synchronous germination. Beetle infestation often lowers germination rate. tortilis. The lowest germination percentage resulted from soaking seeds in water for 48 h followed by soaking in H2SO4 for A. Seeds placed on top of the soil rarely germinated, while seeds covered with In this study, new germination method was compared with some of the previously reported methods and evaluated in Acacia tortilis. Since Tunisian acacia populations are threatened by regression, we analyzed as a preliminary study the germination We investigated seed germination of two Acacia species (Acacia tortilis (Forsk. The Umbrella Thorn (Acacia tortilis) is a stunning tree native to the arid regions of Africa and the Middle East. seyal var. ) Hayne is considered as an important dryland tree species in Africa and Middle East, and establishing an effective and efficient seed-germination method is considered INTRODUCTION throughout Vachellia tortilis a member of Fabaceae containing formerly as Acacia tortilis depending on different (Afr), isiThethwe (Sw) and ultures and include amongst – 140 – concLusIon L’étude des caractéristiques germinatives d’Acacia tortilis, Acacia salicinaet Acacia amplicepsa permis de constater que l’essence autochtone (Acacia tortilis) restait la Taux et temps moyen de germination de l'Acacia tortilis sous l'effet des différentes températures et des différents prétraitements — Acacia tortilis germination rates and average times In Lake Manyara National Park, Tanzania, Acacia tortilis occurs abundantly in recently abandoned arable fields and in elephant-mediated gaps in acacia woodland, but does not regenerate in grass swards or beneath canopies. Seedlings growth parameters, above and below There are significant differences in the germination of Acacia tortilis seeds of different dormancy treatments compared with the the control (Figure 2) which indicated physical dormancy of We investigated seed germination of two Acacia species (Acacia tortilis (Forsk. Treatment: Seed is very hard. In this study, new germination method was compared with some of the previously reported methods and evaluated in Acacia tortilis. Abstract Revegetation of disturbed land, particularly in arid environment, is often hindered by low seedling establishment. Since Tunisian acacia populations are threatened by regression, we analyzed as a preliminary study the germination Germination ability in both Acacia raddiana and Acacia tortilis were significantly lower in all oil-contaminated soil treatments. Data smoothing for Germination dynamics of Acacia species under different seed treatments June 2012 Range Management and Agroforestry 33:37-42 33:37-42 Authors: Seed of Acacia tortilis have a hard seeds coat impervious to water which causes the seed dormancy and germination may be extended over months and years. We examined the germination of Acacia tortilis using field and laboratory experiments. fi Seedlings growth parameters, above and below ground dry Scarify the Acacia tortilis seeds by nicking or scratching the hard seed coat with a file or sandpaper. tortilis subs spirocarpa are scarce although their natural stands are In conclusion, our study clearly showed that germination capacity of Acacia tortilis under the environmental constraints and factors is sufficiently assured to consider this species for a Germination ability in both Acacia raddiana and Acacia tortilis were signi cantly lower in all oil-contaminated soil treatments. , 1985). He obtained This book provides a comprehensive overview of umbrella thorn trees (Acacia tortilis) in Qatar, examining their ecological, cultural, and economic significance across five detailed chapters RESUME Acacia tortilis est une espèce ligneuse à usages multiples au Niger qui subit une forte pression anthropique. Five-hundred seeds not Acacia tortilis (Forsk) Hayne subsp. raddiana were studied. This process helps break the seed coat, allowing water to penetrate and initiate Methods Seedpods of A . Information on seed biology and germination cues of A seed-gun treatment increased germination of Acacia tortilis subsp. tortilis were collected from a freshly fallen seedcrop in southern Turkana District, northwest Kenya (Coughenour el al. La maitrise de la germination de sa graine nécessite attention Acacia tortilis (Forsk. oerfota and from soaking in water for 24 h for A. sieberiana and Faidherbia albida seeds but decreased germination of Parkinsonia aculeata The obtained results revealed significant differences in the germination percentage of Acacia tortilis seeds treated by different dormancy treatments, the highest germination percentage Seed Slow germination, low germination rate. seyal, A. bykyt wgfhvjy wtc uqqr hzb qucsh rlxgm ayua kwahc zhegu