Understanding structural roots system of 5-year-old African plum tree (D. edulis) of seed and vegetative origins (G. Don) H. J. Lam

Asaah, E.; Tchoundjeu, Z.; Wanduku, T. N.; Damme, Patrick Van

doi:10.1007/s00468-010-0449-2

Cited by 14 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results of our investigations on D. edulis indicate that trees of seed origin were characterized by a tap root, reaching depths of about 1.20 m, whereas trees of cutting origin showed three strong vertical roots (d > 5 mm) with the longest reaching depths of 1.31 m Similarly, trees of marcot origin were observed to have thick, relatively short prominent vertical roots, reaching depths of 1.15 m (Asaah et al, 2010) (Fig. 3).…”

Section: Summary Of Resultsmentioning

confidence: 66%

“…The decrease in fine root volume of shea tree or karité (Vitellaria paradoxa) and néré (Parkia biglobosa) trees in the 0-20 cm soil stratum following root pruning during the cropping season has been reported to reduce tree x crop competition for below ground resources resulting in yield increase of (mostly annual) companion crops (Bayala et al, 2004). Several authors have examined the distribution of structural primary roots (Akinnifesi et al, 1999;Asaah et al, 2010;Coutts 1983;Toky and Khosla, 1989). Other research efforts have described and compared the fine root distribution of 8 tree species in India (Chaturvedi and Das, 2003); 13 multipurpose trees in Nigeria (Akinnifesi et al, 1999); Grevillea robusta and Gliricidia sepium in Kenya (Odhiambo et al, 2001); and Senna siamea in three regions of Togo (Vanlauwe et al, 2002).…”

Section: Rationalementioning

confidence: 99%

See 1 more Smart Citation

Beyond vegetative propagation of indigenous fruit trees: case of Dacryodes edulis (G. Don) H. J. Lam and Allanblackia floribunda Oliv.

Asaah

Tchoundjeu

Damme

2012

View full text Add to dashboard Cite

Indigenous fruits/nuts of Africa's humid tropics are increasingly being recognized for their contribution to food security, health (nutrition/medicine), income generation, employment and environmental benefits. However, cultivation of the trees yielding these fruits/nuts is constrained by lack of improved planting materials that are true-to-type and have a short enough juvenile phase to fruit production. In addition, information on both above and belowground growth attributes of these species is scarce. This paper presents an overview of the results of a doctoral research focused on two African indigenous fruit tree species, i.e. Dacryodes edulis (G. Don) H. J. Lam (Burseraceae) and Allanblackia floribunda Oliv. (Clusiaceae), which are currently under domestication. For D. edulis, the objective was to assess and compare the structural and fine rooting systems together with the above ground growth attributes of fruiting trees propagated either sexually or vegetatively. The research aim for A. floribunda was to shorten the long juvenile phase before first fruiting through grafting techniques. In summary, the results from the studies on D. edulis suggest that vegetative propagation of the species, reduces the long juvenile phase to fruiting and maintains trueness in the transfer of desirable traits over generations, it also results in trees that are apparently less competitive for below ground resources, have more stable root system, and are bigger in stature and higher in carbon sinks compared to trees of seed origin. In parallel, A. floribunda was shown to be amenable to grafting both under nursery and field (in situ) conditions. Furthermore, a grafted A. floribunda tree transplanted in the field in 2007, flowered and carried a single fruit to maturity after 4 years, thereby reducing the long juvenile period to first fruit production from about 10-12 years reported in literature to less than 5 years. The findings of this doctoral research are therefore pertinent to efforts towards indigenous fruit/nut tree domestication. However, research should be confirmed as it can be considered a pilot study, one that aims to obtain insights into the effect of vegetative propagation methods on above and below ground growth and development of improved planting materials of D. edulis and A. floribunda under domestication. Simon and Leakey (2004), domestication of agroforestry trees encompasses both the socio-economic and biophysical processes involved in the identification and characterization of germplasm resources; the capture, selection and management of genetic resources; and the regeneration and sustainable cultivation of the species in managed ecosystems. The importance of domesticating and integrating these high-value fruit trees in agricultural landscapes by farmers is increasingly being recognized in Africa's humid tropics. However, in an agroforestry context, there has been scant research into the above and below ground growth attributes of intercropped trees that determine whether the association will be complementa...

show abstract

Section: Summary Of Resultsmentioning

confidence: 66%

Section: Rationalementioning

confidence: 99%

Beyond vegetative propagation of indigenous fruit trees: case of Dacryodes edulis (G. Don) H. J. Lam and Allanblackia floribunda Oliv.

Asaah

Tchoundjeu

Damme

2012

View full text Add to dashboard Cite

show abstract

“…It is worth noticing that even if young cuttings of B. glabrifolia did not need IBA to develop roots, the number of roots increased signifi cantly when the hormone was applied to cuttings of both ages. A good root system is important for tree stability and growth (Asaah et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Propagación de tres especies de Bursera a partir de estacas

Castellanos-Castro

Bonfíl

2013

Bot. Sci.

View full text Add to dashboard Cite

Se estudió la propagación vegetativa de tres especies de Bursera (B. glabrifolia, B. copallifera y B. linanoe). Las estacas se recolectaron durante la temporada seca, cuando los árboles se encontraban en estado de reposo y sin hojas. En un primer ensayo se evaluó el efecto de la especie, la concentración de ácido indol-butírico (control, 4,000 y 9,000 ppm) y la edad relativa de las plantas de origen (árboles jóvenes vs. maduros) en el enraizamiento. El porcentaje de estacas con raíces y el número de raíces por estaca difirió significativamente entre especies y en respuesta a la concentración de ácido indol-butírico y la edad de las plantas de origen. El porcentaje de enraizamiento aumentó en todas las especies cuando se aplicó ácido indol-butírico, pero la sensibilidad al ácido indol-butírico varió con el tipo de estaca. Las que provinieron de plantas juveniles alcanzaron mayores porcentajes de enraizamiento y respondieron menos a la aplicación del ácido indol-butírico. En un segundo ensayo, realizado más tarde durante la temporada seca, se presentó un aumento considerable en el éxito de enraizamiento de una especie (B. linanoe). En conjunto, cuando se usaron estacas de árboles jóvenes y se aplicó ácido indol-butírico, se alcanzaron porcentajes de enraizamiento superiores a 70%. Estos resultados muestran que la propagación de estas especies a partir de estacas es posible. Las estacas enraizadas pueden usarse para la restauración de bosques tropicales secos degradados, en donde normalmente están ausentes, para establecer plantaciones comerciales o en agroforestería.

show abstract

“…An evaluation of the ratio of root number in the top 1.8 m of soil to trunk volume has shown that Casuarina equisetifolia and Markhamia lutea had significantly higher ratios than A. acuminata, Maesopsis eminii, and Grevillea robusta; Casuarina and Maesopsis were most competitive with crops, whereas Markhamia and Grevillea were least competitive. Tree propagation method also affects root architecture, and hence, potentially, competition (Mulatya et al, 2002;Asaah et al, 2010Asaah et al, , 2012.…”

Section: Why Tree Root Distribution Mattersmentioning

confidence: 98%