Juniperus procera Hocht. ex. Endl. in Ethiopian forestry

Pohjonen, Veli; Pukkala, Timo

doi:10.1016/0378-1127(92)90161-2

Cited by 25 publications

(17 citation statements)

References 2 publications

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“…(Cupressaceae), commercially known as the African pencil cedar, is an evergreen dioecious tree that grows up to a height of 40 m and a diameter at breast height of 3 m (Pohjonen and Pukkala, 1992). Its natural distribution extends from Yemen and southwestern Saudi Arabia to east and southern Africa, with altitudinal range of 1100-3500 m and rainfall range of 300-1200 mm/year (Friis, 1992).…”

Section: Introductionmentioning

confidence: 99%

Variation in seed and germination characteristics among Juniperus procera populations in Ethiopia

Mamo

Mihretu

Fekadu

et al. 2006

Forest Ecology and Management

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Section: Introductionmentioning

confidence: 99%

Variation in seed and germination characteristics among Juniperus procera populations in Ethiopia

Mamo

Mihretu

Fekadu

et al. 2006

Forest Ecology and Management

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“…(Cupressaceae), commercially known as African pencil cedar, is an evergreen dioecious tree that grows up to a height of 40 m and a diameter at breast height of 3 m (Pohjonen and Pukkala 1992). Its natural distribution extends from Yemen and southwestern Saudi Arabia to east and southern Africa, with altitudinal range of 1 100-3 500 m and annual rainfall range of 300-1 200 mm (Friis 1992).…”

Section: Introductionmentioning

confidence: 99%

Longevity of Juniperus procera seed lots under different storage conditions: implications for ex situ conservation in seed banks

Mamo

Nigusie

Tigabu

et al. 2011

Journal of Forestry Research

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Juniperus procera Endl. is economically important timber species, but its populations are extremely small and fragmented in its natural habitat, thus, calling for immediate ex situ conservation. Here we examined the effects of seed sources and storage temperature on the longevity of Juniperus procera seed lots through collection and preservation of seeds in seed banks. Seeds were collected from nine sites across the species natural distribution in Ethiopia and stored in four warehouses: modern cold room (5°C), mud house (15°C), concrete block house (17°C) or corrugated iron house (20°C) for 42 months. Every three months, a random sample of stored seeds were drawn and tested for germination. A highly significant variation (p < 0.01) in germination of stored seeds was observed among different storage environments, seed lots, and duration of storage. Over the storage period, seeds stored in the cold room had the highest mean percentage germination, followed by the mud house, corrugated house and blocket house. The cold room (41%) and the mud house (38%) maintained the same level of germination as the intitial germination of the seedlotds (42%). The variation in longevity of stored seeds was significnatly correlated with the initial germination of seed lots (r > 0.80; p < 0.01). Cold storage also resulted in enhancement of germination through its stratification effect that terminated the non-deep Responsible editor: Chai Ruihai physiological dormancy of juniper seeds. In conclusion, seed lots with good initial germination can be effectively stored in cold room (5°C) up to four years. In the absence of modern cold stores, mud houses can be used as a good alternative to store seeds at local level.

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“…ex Endl. (Cupressaceae), commercially known as the African Pencil Cedar, is an evergreen tree that grows to a height of over 40 m and a diameter above 3 m (Pohjonen and Pukkala 1992;Negash 1995). J. procera is the only species among 67 taxa in the genus Juniperus that naturally grows in Africa.…”

Section: Introductionmentioning

confidence: 99%

Anthropogenic and natural causes influencing population genetic structure of Juniperus procera Hochst. ex Endl. in the Ethiopian highlands

Sertse

Gailing

Eliades

et al. 2010

Genet Resour Crop Evol

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Juniperus procera is economically highly important but threatened tree species. It is the only species among 67 taxa in the genus Juniperus that naturally grows in Africa and south of the equator extending up to 18°S in Zimbabwe. Ethiopia is assumed to host the largest J. procera populations, which are also believed to have high genetic variation owing to their wide ecological amplitude. This study assessed genetic variation at AFLPs of J. procera populations in the Ethiopian highlands. In the study six populations, namely Chilimo, Goba, MenageshaSuba, Wef-Washa, Yabelo and Ziquala were included. A total of 20-24 trees from each population were investigated based on 128 AFLP band positions. AMOVA revealed that most of the variation (94%) resided within populations of J. procera suggesting extensive gene flow among populations which is attributable to the outcrossing mating system and effective gene transport mechanisms of the species. However, genetic differentiation among populations was still significant (P \ 0.05), and the differentiation was significantly (P \ 0.05) correlated with geographic distance. All population pairs were significantly (P \ 0.05) differentiated except for Menagesha-Suba and Wef-Washa. These two populations also showed the highest gene diversity (H j = 0.301 and H j = 0.297, respectively). These results are in accordance with historical records that claim the establishment of the Menagesha-Suba juniper population as plantation of seedlings from Wef-Washa back in fifteenth century.

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Juniperus procera Hocht. ex. Endl. in Ethiopian forestry

Cited by 25 publications

References 2 publications

Variation in seed and germination characteristics among Juniperus procera populations in Ethiopia

Variation in seed and germination characteristics among Juniperus procera populations in Ethiopia

Longevity of Juniperus procera seed lots under different storage conditions: implications for ex situ conservation in seed banks

Anthropogenic and natural causes influencing population genetic structure of Juniperus procera Hochst. ex Endl. in the Ethiopian highlands

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