Aluminum distribution and reactive oxygen species accumulation in root tips of two Melaleuca trees differing in aluminum resistance

Tahara, Ko; Yamanoshita, Takashi; Norisada, Mariko; Hasegawa, Isao; Kashima, Hiroyuki; Sasaki, Satoshi; Kojima, Kôhei

doi:10.1007/s11104-008-9593-5

Cited by 53 publications

(31 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mg ion might be an important component of characterizing the physiology of Al resistance. Al 3+ toxicity may also provoke similar mitochondrial dysfunction [71] and ROS production in many plant species [72][73][74][75][76] presumably by causing Mg deficiency inside the mitochondria or by substituting Mg for Al 3+ in Mg 2+ -dependent enzymes [77,78]. Thus, mitochondrial Mg porters could be the target site for Al 3+ toxicity.…”

Section: Mitochondriamentioning

confidence: 99%

Molecular Basis of Aluminium Toxicity in Plants: A Review

Gupta¹,

Gaurav²,

Kumar³

2013

AJPS

161

View full text Add to dashboard Cite

Aluminium toxicity in acid soils having pH below 5.5, affects the production of staple food crops, vegetables and cash crops worldwide. About 50% of the world's potentially arable lands are acidic. It is trivalent cationic form i.e. Al 3+ that limits the plant's growth. Absorbed Aluminium inhibits root elongation and adversely affects plant growth. Recently researches have been conducted to understand the mechanism of Aluminium toxicity and resistance which is important for stable food production in future. Aluminium resistance depends on the ability of the plant to tolerate Aluminium in symplast or to exclude it to soil. Physiological and molecular basis of Aluminium toxicity and resistance mechanism are important to understand for developing genetically engineered plants for Al toxicity resistance. This paper provides an overview of the state of art in this field.

show abstract

Section: Mitochondriamentioning

confidence: 99%

Molecular Basis of Aluminium Toxicity in Plants: A Review

Gupta¹,

Gaurav²,

Kumar³

2013

AJPS

161

View full text Add to dashboard Cite

show abstract

“…To determine whether the presence of oenothein B is ubiquitous in plants, we analyzed root extracts of three Al-sensitive species: Melaleuca bracteata (Myrtaceae; Tahara et al, 2008b), Populus nigra (Schaedle et al, 1989), and Arabidopsis (Fig. 4).…”

Section: The Relationship Between Oenothein B Content and Al Resistancementioning

confidence: 99%

Identification of a Hydrolyzable Tannin, Oenothein B, as an Aluminum-Detoxifying Ligand in a Highly Aluminum-Resistant Tree, Eucalyptus camaldulensis

et al. 2013

Self Cite

View full text Add to dashboard Cite

Eucalyptus camaldulensis is a tree species in the Myrtaceae that exhibits extremely high resistance to aluminum (Al). To explore a novel mechanism of Al resistance in plants, we examined the Al-binding ligands in roots and their role in Al resistance of E. camaldulensis. We identified a novel type of Al-binding ligand, oenothein B, which is a dimeric hydrolyzable tannin with many adjacent phenolic hydroxyl groups. Oenothein B was isolated from root extracts of E. camaldulensis by reverse-phase high-performance liquid chromatography and identified by nuclear magnetic resonance and mass spectrometry analyses. Oenothein B formed water-soluble or -insoluble complexes with Al depending on the ratio of oenothein B to Al and could bind at least four Al ions per molecule. In a bioassay using Arabidopsis (Arabidopsis thaliana), Al-induced inhibition of root elongation was completely alleviated by treatment with exogenous oenothein B, which indicated the capability of oenothein B to detoxify Al. In roots of E. camaldulensis, Al exposure enhanced the accumulation of oenothein B, especially in EDTA-extractable forms, which likely formed complexes with Al. Oenothein B was localized mostly in the root symplast, in which a considerable amount of Al accumulated. In contrast, oenothein B was not detected in three Al-sensitive species, comprising the Myrtaceae tree Melaleuca bracteata, Populus nigra, and Arabidopsis. Oenothein B content in roots of five tree species was correlated with their Al resistance. Taken together, these results suggest that internal detoxification of Al by the formation of complexes with oenothein B in roots likely contributes to the high Al resistance of E. camaldulensis.Aluminum (Al) toxicity is a major factor that limits plant growth in acid soils and affects approximately 30% of the total ice-free land area of the world (von Uexküll and Mutert, 1995). Although Al in soils exist in nonphytotoxic silicate or oxide forms at neutral pH, it is solubilized into a phytotoxic form, mainly as Al 3+

show abstract

“…Al-induced generation of ROS has been shown in maize (Zea mays) and Allium cepa roots (Jones et al, 2006;Achary et al, 2008). Tahara et al (2008) showed that ROS generated to a greater degree in Alsensitive species than in Al-tolerant species. Yamamoto et al (2002Yamamoto et al ( , 2003 have shown a correlation between ROS level and inhibition of growth capacity in cultured tobacco (Nicotiana tabacum) cells.…”

mentioning

confidence: 99%

The Involvement of Lipid Peroxide-Derived Aldehydes in Aluminum Toxicity of Tobacco Roots

et al. 2009

View full text Add to dashboard Cite

Oxidative injury of the root elongation zone is a primary event in aluminum (Al) toxicity in plants, but the injuring species remain unidentified. We verified the hypothesis that lipid peroxide-derived aldehydes, especially highly electrophilic a,bunsaturated aldehydes (2-alkenals), participate in Al toxicity. Transgenic tobacco (Nicotiana tabacum) overexpressing Arabidopsis (Arabidopsis thaliana) 2-alkenal reductase (AER-OE plants), wild-type SR1, and an empty vector-transformed control line (SR-Vec) were exposed to AlCl 3 on their roots. Compared with the two controls, AER-OE plants suffered less retardation of root elongation under AlCl 3 treatment and showed more rapid regrowth of roots upon Al removal. Under AlCl 3 treatment, the roots of AER-OE plants accumulated Al and H 2 O 2 to the same levels as did the sensitive controls, while they accumulated lower levels of aldehydes and suffered less cell death than SR1 and SR-Vec roots. In SR1 roots, AlCl 3 treatment markedly increased the contents of the highly reactive 2-alkenals acrolein, 4-hydroxy-(E)-2-hexenal, and 4-hydroxy-(E)-2-nonenal and other aldehydes such as malondialdehyde and formaldehyde. In AER-OE roots, accumulation of these aldehydes was significantly less. Growth of the roots exposed to 4-hydroxy-(E)-2-nonenal and (E)-2-hexenal were retarded more in SR1 than in AER-OE plants. Thus, the lipid peroxide-derived aldehydes, formed downstream of reactive oxygen species, injured root cells directly. Their suppression by AER provides a new defense mechanism against Al toxicity.

show abstract

Aluminum distribution and reactive oxygen species accumulation in root tips of two Melaleuca trees differing in aluminum resistance

Cited by 53 publications

References 55 publications

Molecular Basis of Aluminium Toxicity in Plants: A Review

Molecular Basis of Aluminium Toxicity in Plants: A Review

Identification of a Hydrolyzable Tannin, Oenothein B, as an Aluminum-Detoxifying Ligand in a Highly Aluminum-Resistant Tree, Eucalyptus camaldulensis

The Involvement of Lipid Peroxide-Derived Aldehydes in Aluminum Toxicity of Tobacco Roots

Contact Info

Product

Resources

About