Mitigation of aluminum toxicity by calcium and magnesium in Japanese cedar (<i>Cryptomeria japonica</i>)

Takami, Chika; Takenaka, Chisato; Tezuka, Takafumi

doi:10.1007/s10310-004-0094-y

Cited by 8 publications

(3 citation statements)

References 22 publications

(17 reference statements)

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“…The toxicity of aluminum to plants could be alleviated by Ca 2+ and Mg 2+ cations (Hossain et al 2005;Takami et al 2005). The results of this study showed that the Ca 2+ and Mg 2+ cations significantly reduced the exchangeable Al on plant roots, which may be why aluminum phytotoxicity was alleviated by cations.…”

Section: Cation Effects On the Distribution Of Aluminum Formsmentioning

confidence: 78%

The forms and distribution of aluminum adsorbed onto maize and soybean roots

Liu

2014

J Soils Sediments

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Purpose The Al forms on maize and soybean roots were investigated to determine the main factors affecting the distribution of Al forms and its relationship with Al plant toxicity. Materials and methods Solution culture experiments were conducted to obtain the fresh roots of maize and soybean. KNO 3 , citric acid, and HCl were used to extract the exchangeable, complexed, and precipitated forms of Al on the roots. Results and discussion The complexed Al was higher than the exchangeable and precipitated Al. Root CECs of soybean and maize were 77 and 55 cmol kg −1 , and functional groups on the soybean roots (262.4 cmol kg −1 ) were greater than on maize roots (210.8 cmol kg −1 ), which resulted in more exchangeable and complexed Al on soybean roots than on maize roots, and was one of the reasons for the increased Al toxicity to soybean. The total and exchangeable Al were the highest on the plant root tips and decreased gradually with increasing distance from the tips. Ca 2+ , Mg 2+ , and NH 4 + cations reduced the exchangeable Al on the roots. Oxalate and malate also reduced the adsorption and absorption of Al by roots, and the effect of oxalate was greater than malate. Conclusions Higher exchangeable and complexed Al on plant roots led to increased Al plant toxicity. Ca 2+ , Mg 2+ , and NH 4 + and oxalate and malate can effectively alleviate Al plant toxicity.

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Section: Cation Effects On the Distribution Of Aluminum Formsmentioning

confidence: 78%

The forms and distribution of aluminum adsorbed onto maize and soybean roots

Liu

2014

J Soils Sediments

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“…Al toxicity could be relieved in Japanese fir using Ca and Mg, which improved the activity of antioxidant enzymes (Takami et al, 2005). Al increased the activity of POD in root tip cells of wheat, while Ca 2þ supplement decreased this Al-induced increase in POD activity (Hossain et al, 2005).…”

Section: Ca 2þ and Sa Increase The Activities Of Antioxidant Enzymes mentioning

confidence: 99%

The interaction of salicylic acid and Ca2+ alleviates aluminum toxicity in soybean (Glycine max L.)

Lan

You

Kong

et al. 2016

Plant Physiology and Biochemistry

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“…The key role of antioxidant enzymes is to reduce or scavenge these ROS. While increased antioxidative enzyme activities as a stress response to Al exposure are well documented in crop species (Basu et al 2001, Sharma and Dubey 2007, Liu et al 2008, few studies have reported the role of ROS and Al stress in tree species (Nagy et al 2004, Takami et al 2005.…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere carbon deposition, oxidative stress and nutritional changes in two poplar species exposed to aluminum

Naik¹,

Smith²,

Cumming³

2009

Tree Physiology

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Species and hybrids in the genus Populus have become the focus of investigation for use in biofuels production and their capacity to sequester carbon (C) in the environment. The identification of species resistant to marginal edaphic sites may be important in both of these endeavors. Plant growth, total dissolved organic carbon (TOC) and low molecular weight organic acid (OA) production, antioxidative enzyme activities and mineral content were assessed in Populus tremuloides L. and Populus trichocarpa Torr. & Gray seedlings under exposure to aluminum (Al). Both species were sensitive to Al, with significant reductions in shoot and root biomass at and above 50 microM Al. Exposure to Al induced 40-fold increases in TOC deposition in P. tremuloides and 100-fold increases in P. trichocarpa. In P. tremuloides, Al treatment induced root exudation of malic and citric acids, while Al increased exudation of citrate and oxalate in P. trichocarpa. Organic acids accounted for 20-64% of total C released upon Al exposure, with the proportion of OAs increasing in P. tremuloides and decreasing in P. trichocarpa. Dose-dependent responses of catalase and ascorbate peroxidase were observed in both root and leaf tissues, indicating that Al exposure induced oxidative stress in poplar. Treatment at and above 100 microM Al reduced the concentrations of calcium (Ca) and magnesium (Mg) in roots and leaves, whereas Al at or above 50 microM reduced root and leaf phosphorous (P) concentrations. The majority of Al taken up was retained in the root system. Even with the induction of OA exudation and accumulation, P. tremuloides and P. trichocarpa remained sensitive to Al, as evidenced by elevated antioxidative enzyme activities, which may reflect inhibition of Ca or P uptake and destabilization of cell homeostasis in these poplar species. Although plants exhibited reductions in growth and evidence of oxidative and nutritional stress, total C rhizodeposition rates for both species increased with increasing Al exposure concentration. Estimated C deposition rates of 16 mg C plant(-1) day(-1) were four-times larger than previously reported values for forest tree species, indicating that edaphic stress plays an important role in C flux to the rhizosphere.

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Mitigation of aluminum toxicity by calcium and magnesium in Japanese cedar (Cryptomeria japonica)

Cited by 8 publications

References 22 publications

The forms and distribution of aluminum adsorbed onto maize and soybean roots

The forms and distribution of aluminum adsorbed onto maize and soybean roots

The interaction of salicylic acid and Ca2+ alleviates aluminum toxicity in soybean (Glycine max L.)

Rhizosphere carbon deposition, oxidative stress and nutritional changes in two poplar species exposed to aluminum

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