Aluminum toxicity in sorghum genotypes as influenced by solution acidity

Tan, Kezheng; Keltjens, Willem G.; Findenegg, G.R.

doi:10.1080/00380768.1993.10417000

Cited by 19 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, significant correlations between Mg-Rye and total, spike and stem biomass (Table 3) are consistent with the above. These results are in agreement with the ideas of Senbayram et al (2015) [41], who remarked that the effects of crops' Mg nutrition on photosynthesis and transport of photosynthates, as well as its influence in enhancing nutrient utilization, and are consistent with those of Tan et al (1993) [42], who reflected that high Mg levels in a solution reduced sorghum sensitivity to Al and at high rates increased the dry matter yield. The above accords with earlier observations that showed how plants with an increased Mg uptake and content in the cytosol are resistant to Al toxicity [43].…”

Section: Discussionsupporting

confidence: 91%

The Importance of Liming with an Appropriate Liming Material: Long-Term Experience with a Typic Palexerult

Olego

Quiroga

López

et al. 2021

Plants

View full text Add to dashboard Cite

Aluminium phytotoxicity is considered the main limiting factor for crop productivity in agricultural acid soils. Liming is a common practice used to improve acidic soil properties, but an appropriate liming material is essential for both agricultural productivity and environmental sustainability. A long-term field experiment with two liming amendments (dolomitic limestone and limestone) was developed during 10 years to determine the changes in soil acidity and assess the effects on crop (rye) yields. Although the adverse effects of the soil acidity conditions were alleviated with both amendments tested, dolomitic limestone was the most effective in the short- and long-term period. In terms of the saturation of exchange complex, dolomitic limestone had a better efficiency, likely based on its rate of dissolution. No significant changes in soil organic matter and exchangeable potassium levels between the treatments tested were found. Both liming materials significantly increased the rye total biomass, but interestingly, significant correlations were showed between tissue levels of magnesium and biomass production, but not between the latter and calcium. The increases in rye biomass production compared with control soils at the end of the research were the following: dolomitic limestone, 47%, and limestone, 32%. A link between an increase in magnesium bioavailability and biomass production was found, as well as between magnesium rye content and total, spike and stem biomass. Hence, it could conceivably be hypothesized that since magnesium is crucial for the transport of assimilates from source leaves to sink organs, alleviating its deficiency leads to avoiding the reducing growth rate of sink organs. Although further investigations are needed to gain a better understanding of liming on the biological, chemical and physical soil properties in the long term, our research provides support for the conceptual premise that an appropriate selection of liming material is crucial for the productivity of acid soils.

show abstract

Section: Discussionsupporting

confidence: 91%

The Importance of Liming with an Appropriate Liming Material: Long-Term Experience with a Typic Palexerult

Olego

Quiroga

López

et al. 2021

Plants

View full text Add to dashboard Cite

show abstract

“…The same was observed for Al-induced Mg deficiency, although the pH dependence of the latter process was less pronounced (Tan et al, 1993). The same was observed for Al-induced Mg deficiency, although the pH dependence of the latter process was less pronounced (Tan et al, 1993).…”

Section: Introductionsupporting

confidence: 75%

“…This might be explained by "hydroxy amelioration" of AI toxicity (i.e. The relative susceptibility of the genotypes to A1 was dependent on pH and external A1 concentration (Tan et al, 1992b;Tan et al, 1993). In addition, observed temporary decline of total soluble A1 in the rooting solution might have contributed to its diminished effect on the roots.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the contribution of magnesium deficiency in the aluminium toxicity syndrome in twelve sorghum genotypes

1993

Self Cite

View full text Add to dashboard Cite

The contribution of Mg deficiency to A1 stress in twelve different sorghum (Sorghum bicolor (L.) Moench) genotypes was investigated in nutrient solution culture under conditions of low Mg supply (between 50 and 1000/zM) at two pH values. At pH 4.2, 30 txM AI strongly inhibited Mg uptake. When dry matter yield was plotted as a function of the plant Mg concentration, similar response curves were obtained in the absence and the presence of A1 with three genotypes. With many other genotypes dry matter yields of the control (without A1 treatment) and Al-stressed plants were remarkably different at similar internal Mg concentrations, suggesting that growth had been suppressed not by Mg deficiency but by another factor, i.e. Al-induced root damage. At pH 4.8, 30/xM A1 hardly induced root damage but reduced Mg uptake and Al-induced Mg deficiency could almost completely account for the growth reaction of all genotypes. Therefore, at this pH the efficiency of uptake or use of Mg in different genotypes was the basis of their respective susceptibility to AI toxicity. When specific root length surpassed a certain critical range below 80-100 m per g dry root, growth control by Al-induced Mg deficiency was nearly abolished. The pH and AI concentration where this range was reached depended on the AI sensitivity of the genotypes.

show abstract

“…In the present experiment, the pH value of the + A I treatment was fixed at 3.8, where A1 is highly soluble (Magistad 1925) and is present mainly in the form o f A P + (Tan et al 1993) though this pH value is not common in acid soil in nature. This pH value was determined after observing to the growth response of several plants in a low pH range (Tanaka and Hayakawa 1974;Moritsugu and Kawasaki 1980).…”

Section: Resultsmentioning

confidence: 99%