Comparative studies on aluminum tolerance screening techniques for sorghum, soybean and maize in simple solution culture

Akhter, A. and Wagatsuma, T. and Khan, M.S.H. and Tawaraya, K. (2009) Comparative studies on aluminum tolerance screening techniques for sorghum, soybean and maize in simple solution culture. American Journal of Plant Physiology, 4 (1). pp. 1-8.

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Toxic symptoms of crop plant species to Al are widely studied. The most dramatic symptom of Al toxicity is the inhibition of root elongation. As a matter, this symptom long been used to know the Al-tolerance of plant species. But, there was some scope to search proper concentration of Al during the study of Al-tolerance screening. Objective of the present study was to recommend proper concentration of Al for maize (Al-tolerant), soybean (intermediate Al-tolerant) and sorghum (Al-sensitive). Two concentrations of Al (2.5 and 2 0 μM AlCl3 in 0.2 mM CaCl2) were used. For maize former concentration (2.5 μM) was too light to inhibit root elongation (Al tolerance 60-77%) and could not discriminate Al-tolerance among the cultivar whereas later concentration 20 μM represents better illustration of tolerances (40-65%). Soybean was intermediate Al-tolerant crop and both concentration of Al could be suggested for Al-tolerance screening of this crop (40 to 79% for low Al and 17 to 65% for high Al). Sorghum was Al sensitive and high Al concentration made so severe inhibition of root elongation to all cultivars that Al-tolerance among the cultivars could not be differentiate well (Al tolerance 20-24%). On the other hand, at low Al concentration Al-tolerance was in the range of 38-51%. All crop species showed significant positive correlation (R2 = 0.945*, 0.936** or 0.921** for sorghum, soybean and maize, respectively) between the Al tolerance from 2.5 and from 20 μM Al. From these results it could be suggested that treatment concentration for Al tolerance screening should be conducted based on the Al tolerance level of each crop species.

Item Type: Article
Author Affiliation: Laboratory of Plant Nuttrition and Soil Science, Faculty of Agriculture Yamagata University, 1-23 Wakaba Manchi, Tsuruoka, Yamagata 997 8555, Japan
Subjects: Plant Production > Production Practices
Plant Physiology and Biochemistry > Plant Physiology
Divisions: Sorghum
Depositing User: Mr T L Gautham
Date Deposited: 12 Dec 2010 22:07
Last Modified: 29 Dec 2010 19:51
Official URL:

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