Phosphorus Enhances Al Resistance in Al-resistant Lespedeza bicolor but not in Al-sensitive L. cuneata Under Relatively High Al Stress

Sun, Qing; Shen, Ren Fang; Zhao, Xue Qiang; Chen, Rong‐Fu; Xiao, Dong

doi:10.1093/aob/mcn166

Cited by 62 publications

(44 citation statements)

References 33 publications

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“…of pummelo seedlings, as previously found for rice (Oryza sativa) (Nakagawa et al, 2003) and Lespedeza bicolor (Sun et al, 2008). Al decreased leaf and root P concentration ( Figure 2C and D), as previously reported for 'Nemaguard' peach (Prunus persica) (Graham, 2001), white lupin (Shane et al, 2003) and beech (Fagus sylvatica) (P ( ahlsson, 1990).…”

Section: Discussionsupporting

confidence: 86%

Changes in organic acid metabolism differ between roots and leaves of Citrus grandis in response to phosphorus and aluminum interactions

Chen

Jiang

Yang

et al. 2009

Journal of Plant Physiology

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Section: Discussionsupporting

confidence: 86%

Changes in organic acid metabolism differ between roots and leaves of Citrus grandis in response to phosphorus and aluminum interactions

Chen

Jiang

Yang

et al. 2009

Journal of Plant Physiology

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“…Sun et al (2008) reported that phosphorus application alleviated Al toxicity in L. bicolor and decreased the exudation of organic acid anions under Al stress. The same phenomenon has also been found in other plant species (Gaume et al 2001;Dong et al 2004).…”

Section: Discussionmentioning

confidence: 99%

The alleviating effect of ammonium on aluminum toxicity in Lespedeza bicolor results in decreased aluminum-induced malate secretion from roots compared with nitrate

2010

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NH 4 + and NO 3 − supply often affect aluminum (Al) toxicity in plants growing in acidic soils. Lespedeza bicolor is a leguminous shrub well adapted to acid infertile soils. Secretion of organic acid anions has been demonstrated to be the main mechanism responsible for its Al resistance. The objective of this study was to investigate how NH 4 + and NO 3 − supply affect Al toxicity in L. bicolor and whether Alinduced organic acid anion secretion is involved in this effect. Long-term (36 d) Al treatment increased L. bicolor root and shoot growth in a NH 4 + medium. NH 4 + treatment also decreased Al, Ca, Mg, Fe, and Mn contents in the roots of L. bicolor compared with NO 3 − treatment. After short-term (24 h) Al treatment, L. bicolor seedlings had higher absolute root elongation and relative root elongation, and lower Al contents in root tips with NH 4 + treatment than with NO 3 − treatment. In vitro Al adsorption kinetics experiment with isolated root cell wall showed that the accumulative amount of Al adsorbed in root cell walls was lower with NH 4 + treatment than with NO 3 − treatment. The roots of L. bicolor seedlings subjected to Al stress secreted less malate with NH 4 + treatment than with NO 3 − treatment, whereas there was no significant difference in the malate content of L. bicolor roots between the treatments after exposure to Al. Taken together, these results show that NH 4 + alleviated the toxicity of Al in L. bicolor in solution culture compared with NO 3 − , and this alleviating effect further resulted in decreased Al-induced malate secretion from L. bicolor roots.

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“…Evidence has shown that Al toxicity can be alleviated by P supply in some plants, including C. grandis [30, 31], sorghum [124], maize [102], and L. bicolor [125]. There are several authors investigating the effects of P on the Al-induced secretion of OA anions from roots, but the results are somewhat different.…”

Section: Aluminium-induced Secretion Of Organic Acid Anions From Rmentioning

confidence: 99%

Roles of Organic Acid Anion Secretion in Aluminium Tolerance of Higher Plants

Yang

Jiang

et al. 2013

BioMed Research International

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Approximately 30% of the world's total land area and over 50% of the world's potential arable lands are acidic. Furthermore, the acidity of the soils is gradually increasing as a result of the environmental problems including some farming practices and acid rain. At mildly acidic or neutral soils, aluminium(Al) occurs primarily as insoluble deposits and is essentially biologically inactive. However, in many acidic soils throughout the tropics and subtropics, Al toxicity is a major factor limiting crop productivity. The Al-induced secretion of organic acid (OA) anions, mainly citrate, oxalate, and malate, from roots is the best documented mechanism of Al tolerance in higher plants. Increasing evidence shows that the Al-induced secretion of OA anions may be related to the following several factors, including (a) anion channels or transporters, (b) internal concentrations of OA anions in plant tissues, (d) temperature, (e) root plasma membrane (PM) H+-ATPase, (f) magnesium (Mg), and (e) phosphorus (P). Genetically modified plants and cells with higher Al tolerance by overexpressing genes for the secretion and the biosynthesis of OA anions have been obtained. In addition, some aspects needed to be further studied are also discussed.

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Phosphorus Enhances Al Resistance in Al-resistant Lespedeza bicolor but not in Al-sensitive L. cuneata Under Relatively High Al Stress

Cited by 62 publications

References 33 publications

Changes in organic acid metabolism differ between roots and leaves of Citrus grandis in response to phosphorus and aluminum interactions

Changes in organic acid metabolism differ between roots and leaves of Citrus grandis in response to phosphorus and aluminum interactions

The alleviating effect of ammonium on aluminum toxicity in Lespedeza bicolor results in decreased aluminum-induced malate secretion from roots compared with nitrate

Roles of Organic Acid Anion Secretion in Aluminium Tolerance of Higher Plants

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