Ecophysiological and genetic variation in seedling traits and in first-year field performance of eight Acacia senegal provenances in the Blue Nile, Sudan

Raddad, El Amin Yousif

doi:10.1007/s11056-007-9049-4

Cited by 20 publications

(24 citation statements)

References 36 publications

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“…Therefore, tree improvement programs can select genetically more productive provenances for reforestation. Genetic variation in growth among natural populations has also been reported in a few other native hardwood species in Africa (Sniezko and Stewart, 1989;Billand and De Framond, 1993;Wanyancha et al, 1994;Bastide and Diallo, 1996;Dangasuk et al, 1997;Roupsard et al, 1998;Diallo et al, 2000;Wolde-Mieskel and Sinclair, 2000;Appiah, 2003;Loha et al, 2006;Raddad and Luukkanen, 2006;Raddad, 2007).…”

Section: Discussionmentioning

confidence: 76%

“…To our knowledge, these are the first reported clines in growth and survival of a hardwood species from the West African Sahel. Clinal, ecotypic and/or regional variation in growth have been reported among provenances of a few other African hardwood species (Sniezko and Stewart, 1989;Dangasuk et al, 1997;Raddad, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…ex Delile (Diallo et al, 2000;Wolde-Mieskel and Sinclair, 2000); Acacia senegal (L.) Willd. (Diallo et al, 2000;Raddad and Luukkanen, 2006;Raddad, 2007); Anogeissus leiocarpus (DC.) Guill.…”

Section: Discussionmentioning

confidence: 99%

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Growth and survival of Prosopis africana provenances tested in Niger and related to rainfall gradients in the West African Sahel

Weber¹,

Larwanou

Abasse

et al. 2008

Forest Ecology and Management

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

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Growth and survival of Prosopis africana provenances tested in Niger and related to rainfall gradients in the West African Sahel

Weber¹,

Larwanou

Abasse

et al. 2008

Forest Ecology and Management

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“…and Acacia seyal Del. are a very economically important species for the production of gum Arabic, for reforestation and reclamation of marginal lands, for high-protein forage, for fuel wood, timber, shelterbelts and soil fertility improvement thanks to their root symbiotic nitrogen-fixing bacteria (Palmberg 1981, Harrier et al 2000Midgley and Bond 2001;Otieno et al 2005;Raddad et al 2005;Raddad 2007), and they are present in many social and cultural facets of African local communities. In addition, acacias have a reputation for moderate-to-high tolerance to water stress and for biomass production even under extreme drought conditions (Oba et al 2001;Otieno et al 2005) and cold spells (Raddad et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of water stress and substrate fertility on the early growth of Acacia senegal and Acacia seyal from Ethiopian Savanna woodlands

Merine

Rodríguez-García

Alı́a

et al. 2014

Trees

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Key message Acacia senegal and Acacia seyal present different drought stress coping mechanisms that are independent of substrate fertility. Higher substrate fertility increased aboveground plant growth, even with low watering. Abstract The potential of native African tree species for agriculture and forestry have not yet been thoroughly investigated. In this experiment, we studied the early growth of Acacia senegal and Acacia seyal plants in an experiment with two substrates of contrasting fertility (low/ high) and two watering frequency regimes (low = 24.40 l/m 2 per month, high = 48.80 l/m 2 per month). Our objectives were: (1) to study whether the mechanisms by which nutrients affect plant growth at the seedling stage operate differently when water availability varies, and (2) to look for differences in the growth strategies of the two species in early stages. Higher substrate fertility increased aboveground plant growth at the expense of roots in both water regimes. Though water stress significantly limited growth under both soil conditions, substrate fertility effects were relatively higher in plants with low water supply than in those with high water supply. However, even with low resources the root-to-shoot ratio was between 0.7 and 0.9, plants presented adequate nutrition and no mortality was observed. This indicates opportunistic mechanisms for water and nutrient use. A. seyal showed the lowest negative pre-dawn stem water potential value (-0.15 MPa) and shed nearly all leaves in the hottest month of the assay, which suggests a different drought avoidance strategy and adaptation to water stress than A. senegal. Both species can be produced successfully in local nursery conditions and can survive and thrive with low watering. The study also demonstrated that fast growing genotypes can be effectively isolated in nursery conditions.

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“…However, no reports have assessed the variation of seed and seedling traits among endemic H. ammodendron provenances in China. Studies have shown that there are clear differences in growth parameters and biomass gain strategies between provenances when they are grown under similar conditions, and such differences could possibly be observed at an early developmental stage (Raddad 2007). The characteristics of seeds from different provenances vary in accordance with their geographical location (Mantovan 2002).…”

Section: Introductionmentioning

confidence: 99%

Genetic variation in seed and seedling traits of six Haloxylon ammodendron shrub provenances in desert areas of China

et al. 2010

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China is one of the countries most severely affected by desertification. Haloxylon ammodendron is an ecologically important component of the desert ecosystem and is one of the main shrub species used for ecological restoration. We compared the genetic variation in seed and seedling traits among six H. ammodendron provenances arrayed from east to west in China. The experiment was carried out in a greenhouse in well-prepared seedling beds (lines 1.5 m apart and seeds with in lines 1.0 m apart, 2.0 cm deep) with five lines (seven seeds per line) per provenance in a randomized block design with six replicates. The seed traits of fruit wing length, kernel weight, germination rate, and survival rate were compared, as were the seedling traits of internode length, branch number, assimilation shoot diameter, height, collar diameter, new shoot length, main root number, main root length, aboveground fresh weight, and underground fresh weight. Moreover, correlations between each seed and seedling trait and climate and geographical factors were assessed. The results show that the seeds from Dengkou County, Inner Mongolia had the best performance. Germination rate and survival rate were significantly positively correlated with longitude; and fruit wing length, kernel weight, seedling height, and new shoot length were significantly negatively correlated with latitude. Fruit wing length was significantly correlated with altitude. Among the climatic factors, the temperature in January had a strong direct effect on fruit wing length, germination rate, seedling height, and new shoot length. The mean annual rainfall had a strong direct effect on collar diameter. Humidity had a strong direct effect on survival rate. Seedling height, aboveground weight, and collar diameter could be important criteria for early provenance selection in the seedling stage. This study provides a reference for the selection of high-quality H. ammodendron seeds for drylands of northwest China.

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Ecophysiological and genetic variation in seedling traits and in first-year field performance of eight Acacia senegal provenances in the Blue Nile, Sudan

Cited by 20 publications

References 36 publications

Growth and survival of Prosopis africana provenances tested in Niger and related to rainfall gradients in the West African Sahel

Growth and survival of Prosopis africana provenances tested in Niger and related to rainfall gradients in the West African Sahel

Effects of water stress and substrate fertility on the early growth of Acacia senegal and Acacia seyal from Ethiopian Savanna woodlands

Genetic variation in seed and seedling traits of six Haloxylon ammodendron shrub provenances in desert areas of China

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