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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 4, No. 2, 1996, pp. 177-184
Bioline Code: cs96055
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 4, No. 2, 1996, pp. 177-184

Mugai, E.N. & Agong, S.G.


La croissance des haricots rosecoco (Phaseolus vulgaris L.) cultives
dans le sable, e neuf concentrations d'aluminium (0, 2, 4, 6, 10, 20, 50,
80 et 100 ppm Al), etait influencee d'une faon significative par des
concentrations d'aluminium entre 4 et 10 ppm. La germination et la
nodulation etaient reduites par 80 ppm d'aluminium et la nodulation etait
inhibee par des concentrations encore plus elevees. L'absorption de calcium
dans les feuilles augmentait quand la quantite d'aluminium augmentait dans
la solution nutritive et ceci correspondait de faon positive e la quantite
d'aluminium accumulee dans les feuilles probablement e cause d'une extreme
deficience de potassium. L'assimiliation de phosphore par la plante diminue
substantiellement avec l'augmentation de celle d'aluminium. Le potassium a
une relation moins lineaire avec l'augmentation du niveau d'aluminium. La
quantite maximale de K dans la plante etait obtenu e 2ppm d'aluminium avant
de diminuer entre 6 et 50ppm d'aluminium, alors qu' une nouvelle
augmentation etait observee e 80ppm d'aluminium. L'augmentation du niveau
de K e ce moment etait probablement causee par la reduction de la
croissance de la plante. Cette etude permet de conclure que de petites
quantites (2 e 4ppm) d'aluminium n'ont pas d'influences nefastes sur la
germination, la nodulation et la nutrition minerale des haricots resecoco.
Par consequent, ces haricots peuvent tre utilises pour augmenter la
production agricole dans les sols acides ou dans des sols avec des
concentrations d'aluminium moderees.

Mots Clés
Phaseolus vulgaris, tolerance en aluminium, germination, nutrition minerale, nodulation

 en The response of 'Rosecoco' beans to aluminium treatment
Mugai, E.N. & Agong, S.G.


Rosecoco beans (Phaseolus vulgaris L.) grown in sand culture at nine
aluminium (Al) concentrations (0, 2, 4, 6, 10, 20, 50, 80 and 100 ppm Al)
had their growth significantly influenced between 4 and 10 ppm Al.
Germination and nodulation were reduced by Al at 80 ppm and above which
complete inhibition of nodulation was observed. Calcium uptake in leaves
increased with increasing Al content in the nutrient solution and
positively corresponded to the amount of Al accumulated in the leaves
possibly as a result of extreme K deficiency. Phosphorus uptake by the
plant substantially decreased with the increased Al uptake. Potassium
displayed a less consistent relationship with increasing Al level. The
maximum K content in the plant tissue was attained at only 2 ppm before a
decline between 6 and 50 ppm Al and an increase at 80 ppm was noted. The K
level shot up at this stage probably due to concentration caused by reduced
plant growth. It is concluded from this study that small amounts (2 to 4
ppm) of Al may not be detrimental for the germination, nodulation and
mineral nutrition in the bean.  Consequently, Rosecoco beans may be
suitable for increasing agricultural production in acid affected soils of
moderate aluminium concentrations.

Phaseolus vulgaris, Aluminium tolerance, germination, mineral nutrition, nodulation

© Copyright 1996 - African Crop Science Society

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