Syndrome of Aluminum Toxicity and Diversity of Aluminum Resistance in Higher Plants

Feng, Jian

doi:10.1016/s0074-7696(07)64005-4

Cited by 333 publications

(276 citation statements)

References 103 publications

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“…Al is the most abundant metal in the earth's crust, therefore plants have evolved different mechanisms to detoxify this metal (Kochian, 1995;Ma et al, 2001;Kochian et al, 2004;Ma, 2008). One of the welldocumented mechanisms is the secretion of organic acid anions, including citrate, malate, and oxalate, from the roots.…”

Section: Atstar1 Is Required For Al Tolerance In Arabidopsismentioning

confidence: 99%

Knockout of a Bacterial-Type ATP-Binding Cassette Transporter Gene, AtSTAR1, Results in Increased Aluminum Sensitivity in Arabidopsis

2010

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Section: Atstar1 Is Required For Al Tolerance In Arabidopsismentioning

confidence: 99%

Knockout of a Bacterial-Type ATP-Binding Cassette Transporter Gene, AtSTAR1, Results in Increased Aluminum Sensitivity in Arabidopsis

2010

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“…To cope with Al stress, plants have adopted several resistance mechanisms, including (i) an Al exclusion mechanism in which plants release organic acids (OAs) from the root apex into the rhizosphere to chelate toxic Al 3+ ions and prevent them from entering into root cells, and (ii) an internal Al tolerance mechanism by which Al is sequestered in the vacuole of the root cell and/or translocated to the shoot for sequestration in leaf cell vacuoles (1,2,5).…”

mentioning

confidence: 99%

NIP1;2 is a plasma membrane-localized transporter mediating aluminum uptake, translocation, and tolerance in Arabidopsis

Wang

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

118

129

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Members of the aquaporin (AQP) family have been suggested to transport aluminum (Al) in plants; however, the Al form transported by AQPs and the roles of AQPs in Al tolerance remain elusive. Here we report that NIP1;2, a plasma membrane-localized member of the Arabidopsis nodulin 26-like intrinsic protein (NIP) subfamily of the AQP family, facilitates Al-malate transport from the root cell wall into the root symplasm, with subsequent Al xylem loading and root-toshoot translocation, which are critical steps in an internal Al tolerance mechanism in Arabidopsis. We found that NIP1;2 transcripts are expressed mainly in the root tips, and that this expression is enhanced by Al but not by other metal stresses. Mutations in NIP1;2 lead to hyperaccumulation of toxic Al 3+ in the root cell wall, inhibition of root-to-shoot Al translocation, and a significant reduction in Al tolerance. NIP1;2 facilitates the transport of Al-malate, but not Al 3+ ions, in both yeast and Arabidopsis. We demonstrate that the formation of the Al-malate complex in the root tip apoplast is a prerequisite for NIP1;2-mediated Al removal from the root cell wall, and that this requires a functional root malate exudation system mediated by the Al-activated malate transporter, ALMT1. Taken together, these findings reveal a critical linkage between the previously identified Al exclusion mechanism based on root malate release and an internal Al tolerance mechanism identified here through the coordinated function of NIP1;2 and ALMT1, which is required for Al removal from the root cell wall, root-to-shoot Al translocation, and overall Al tolerance in Arabidopsis.aquaporin | nodulin 26-like protein | aluminum tolerance | organic acid exudation | malate

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“…Al-induced secretion of organic acid as chelating agents has been shown to be the dominant detoxification mechanism for many plant species (Kochin et al 2004;Poschenrieder et al, 2005;Ma 2007;Maron et al, 2010). Though secretion patterns, temperature sensitivity, response to inhibitors, dose response to Al etc., depend on the species of concern (Ma 2007;Dong et al, 2008), citrate, malate, and oxalate are reported to be exudated at the rhizosphere and the apoplast of many plant species Poschenrieder et al, 2005).…”

Section: Role Of Nitric Oxide On Aluminum Toxicitymentioning

confidence: 99%

“…Though secretion patterns, temperature sensitivity, response to inhibitors, dose response to Al etc., depend on the species of concern (Ma 2007;Dong et al, 2008), citrate, malate, and oxalate are reported to be exudated at the rhizosphere and the apoplast of many plant species Poschenrieder et al, 2005). In some plants, secretion of organic acids commences immediately after the exposure of the plant to Al, thus induction of genes is not expected (Ma, 2007).…”

Section: Role Of Nitric Oxide On Aluminum Toxicitymentioning

confidence: 99%

How do Citrus Crops Cope with Aluminum Toxicity?

Arunakumara¹,

Walpola²,

Yoon³

2012

Korean Journal of Soil Science and Fertilizer

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World Agriculture faces daunting challenges in feeding the growing population today. Reduction in arable land extent due to numerous reasons threatens achievement of food and nutritional security. Under this back ground, agricultural use of acidic soils, which account for approximately 40 % of the world arable lands is of utmost important. However, due to aluminum (Al) toxicity and low available phosphorous (P) content, crop production in acidic soils is restricted. Citrus, in this context, gains worldwide recognition as a crop adapted to harsh environments. The present paper reviewed Al toxicity and possible toxicity alleviation tactics in citrus. As reported for many other crops, inhibition of root elongation, photosynthesis and growth is experienced in citrus also due to Al toxicity. Focusing at toxicity alleviation, interaction between boron (B) and Al as well as phosphorus and Al has been discussed intensively. Al toxicity in citrus could be alleviated by P through increasing immobilization of Al in roots and P level in shoots rather than through increasing organic acid secretion, which has been widely reported in other crops. Boron-induced changes in Al speciation and/or sub-cellular compartmentation has also been suggested in amelioration of root inhibition in citrus. Despite the species-dependent manner of response to Al toxicity, many commercially important citrus species can be grown successfully in acidic soils, provided toxicity alleviation Agro-biological tactics such as addition of phosphorous fertilizers are used properly.

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Syndrome of Aluminum Toxicity and Diversity of Aluminum Resistance in Higher Plants

Cited by 333 publications

References 103 publications

Knockout of a Bacterial-Type ATP-Binding Cassette Transporter Gene, AtSTAR1, Results in Increased Aluminum Sensitivity in Arabidopsis

Knockout of a Bacterial-Type ATP-Binding Cassette Transporter Gene, AtSTAR1, Results in Increased Aluminum Sensitivity in Arabidopsis

NIP1;2 is a plasma membrane-localized transporter mediating aluminum uptake, translocation, and tolerance in Arabidopsis

How do Citrus Crops Cope with Aluminum Toxicity?

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