Mechanisms of higher tolerance of Al stress in phosphorus deficient maize seedlings: The significance of phenolics in Al resistance

Effect of phosphorus deficiency on aluminium‐induced citrate exudation in soybean (Glycine max)

“…The present results revealed that total Al accumulation in soybean root apices was sharply reduced by decreasing P supply and plants recovered for 1 day could accumulate more Al than continuously P‐starved soybean (Figs 4 and 5, Table 2), indicating that Al absorption is closely correlated to P supply. This is consistent with the previous results obtained from different materials and methods (Tan and Keltjens 1990a, 1990b, Yamamoto et al. 1996, Wagatsuma et al.…”

“…The present results revealed that total Al accumulation in soybean root apices was sharply reduced by decreasing P supply and plants recovered for 1 day could accumulate more Al than continuously P-starved soybean (Figs 4 and 5, Table 2), indicating that Al absorption is closely correlated to P supply. This is consistent with the previous results obtained from different materials and methods (Tan and Keltjens 1990a, 1990b, Yamamoto et al 1996, Wagatsuma et al 2000. Keltjens (1990a, 1990b) reported that plants provided with more P had obviously higher Al concentrations in the roots of both Al-tolerant and sensitive sorghum than those provided with less P. Similarly, Yamamoto et al (1996) observed that cultured tobacco cells that had been starved of Pi (-P cells) accumulated 30-40% less Al compared with πP cells.…”

“…1996). Using maize whole plants, Wagatsuma et al. (2000) also observed that P‐deficient maize plants accumulated less Al in roots and showed tolerance to Al.…”

Polymeric Forms of Al13and Silicon Compounds as Unconventional Binding Agents for some Toxic Metals in Soils

“…Similar conclusions were drawn by Parker and Pedler (1998) from tests with maize. Other authors (Wallace 1992;Wagatsuma et al 2001) reported the toxic influence of polymeric Al forms on oat tolerant towards mono-nucleus forms. The opposite opinion was presented by Badora (1999), who did not observe any Al 13 toxicity of 0.10 mmol · dm -3 concentration in hydroponic tests with pea.…”

Yellow deposits formation in roots is a part of tobacco plant phenotype under sulfur deficiency

“…Noteworthy, phenolics (mostly the subgroup called flavonoids) are, besides chlorophylls, the main group of compounds that affect color of plant organs. Moreover, it was shown that the level of phenolic compounds change during plant response to environmental stresses (27) including deficits of such nutrients as iron (Fe) (28), phosphorus (P) (29), nitrogen (N) (30) and S (31). Unfortunately, studies that showed increased level of flavonoids under S deficit were performed using whole seedlings as plant material.…”