The ALMT Family of Organic Acid Transporters in Plants and Their Involvement in Detoxification and Nutrient Security

Sharma, Tripti; Drèyer, Ingo; Kochian, Leon V.; Piñeros, Miguel A.

doi:10.3389/fpls.2016.01488

Cited by 120 publications

(91 citation statements)

References 90 publications

(157 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ouma et al [94] found that the nutrient culture screening for Al toxicity can predict field selection under Al toxic soils with an accuracy of 24 to 35%, depending on the saturation level of Al in a particular soil and the level of available phosphorus. Under low soil pH, Al ions tend to form highly stable complexes with phosphorus [102]. Under these conditions, maize cultivars with high P use efficiency have a good acid soil tolerance capacity.…”

Section: Conventional Breeding Methodsmentioning

confidence: 99%

“…Froese and Carter [132] found that the positive allele of marker wmc331 linked to ALMT1 was not widely present in the winter wheat germplasm used in their study but was present only in the most tolerant cultivar. In addition to Al tolerance, genes in the ALMT family are also known to influence other physiological processes such as guard cell regulation, fruit quality, and seed development [102].…”

Section: Application Of Molecular Tools In Breeding For Maize Toleranmentioning

confidence: 99%

See 1 more Smart Citation

Breeding Maize for Tolerance to Acidic Soils: A Review

et al. 2018

View full text Add to dashboard Cite

Acidic soils hamper maize (Zea mays L.) production, causing yield losses of up to 69%. Low pH acidic soils can lead to aluminum (Al), manganese (Mn), or iron (Fe) toxicities. Genetic variability for tolerance to low soil pH exists among maize genotypes, which can be exploited in developing high-yielding acid-tolerant maize genotypes. In this paper, we review some of the most recent applications of conventional and molecular breeding approaches for improving maize yield under acidic soils. The gaps in breeding maize for tolerance to low soil pH are highlighted and an emphasis is placed on promoting the adoption of the numerous existing acid soil-tolerant genotypes. While progress has been made in breeding for tolerance to Al toxicity, little has been done on Mn and Fe toxicities. More research inputs are therefore required in: (1) developing screening methods for tolerance to manganese and iron toxicities; (2) elucidating the mechanisms of maize tolerance to Mn and Fe toxicities; and, (3) identifying the quantitative trait loci (QTL) responsible for Mn and Fe tolerance in maize cultivars. There is also a need to raise farmers' and other stakeholders' awareness of the problem of Al, Mn, and Fe soil toxicities to improve the adoption rate of the available acid-tolerant maize genotypes. Maize breeders should work more closely with farmers at the early stages of the release process of a new variety to facilitate its adoption level. Researchers are encouraged to strengthen their collaboration and exchange low soil pH-tolerant maize germplasm.

show abstract

Section: Conventional Breeding Methodsmentioning

confidence: 99%

Section: Application Of Molecular Tools In Breeding For Maize Toleranmentioning

confidence: 99%

Breeding Maize for Tolerance to Acidic Soils: A Review

et al. 2018

View full text Add to dashboard Cite

show abstract

“…It is still uncertain whether our knowledge on the transporter types involved in the nutrient exchange is complete. Phosphorus (P) and C sources, for instance, might be transported, not through proton-coupled symporters alone, but also by diffusion facilitators; P could be transported via phosphatepermeable anion channels (Dreyer et al, 2012) and C could be transported in neutral form as a sugar through sugar channels of the SWEET type (Sugar Will Eventually be Exported Transporter; Chen et al, 2010) or as organic acids through channels of the ALMT type (ALuminium activated Malate Transporter; Sharma et al, 2016). In this study, we tackled this issue by evaluating, in an unbiased manner, the thermodynamic features of general transporter network models for their use in nutrient exchange in AM symbiosis.…”

Section: Introductionmentioning

confidence: 99%

Nutrient exchange in arbuscular mycorrhizal symbiosis from a thermodynamic point of view

et al. 2019

Self Cite

View full text Add to dashboard Cite

Summary To obtain insights into the dynamics of nutrient exchange in arbuscular mycorrhizal ( AM ) symbiosis, we modelled mathematically the two‐membrane system at the plant–fungus interface and simulated its dynamics. In computational cell biology experiments, the full range of nutrient transport pathways was tested for their ability to exchange phosphorus (P)/carbon (C)/nitrogen (N) sources. As a result, we obtained a thermodynamically justified, independent and comprehensive model of the dynamics of the nutrient exchange at the plant–fungus contact zone. The predicted optimal transporter network coincides with the transporter set independently confirmed in wet‐laboratory experiments previously, indicating that all essential transporter types have been discovered. The thermodynamic analyses suggest that phosphate is released from the fungus via proton‐coupled phosphate transporters rather than anion channels. Optimal transport pathways, such as cation channels or proton‐coupled symporters, shuttle nutrients together with a positive charge across the membranes. Only in exceptional cases does electroneutral transport via diffusion facilitators appear to be plausible. The thermodynamic models presented here can be generalized and adapted to other forms of mycorrhiza and open the door for future studies combining wet‐laboratory experiments with computational simulations to obtain a deeper understanding of the investigated phenomena.

show abstract

“…Most members of the ALMT family are not involved in Al 3+ resistance but perform other functions on different membranes [21,36]. For example, four members in Arabidopsis (AtALMT4, AtALMT6, AtALMT9 and AtALMT12) and one in barley (Hordeum vulgare L., HvALMT1) are involved in guard cell regulation.…”

Section: Almt Genes Perform Various Functions Among Plantsmentioning

confidence: 99%

The ALMT Gene Family Performs Multiple Functions in Plants

Liu

Zhou

2018

Agronomy

View full text Add to dashboard Cite

Abstract:The aluminium activated malate transporter (ALMT) gene family is named after the first member of the family identified in wheat (Triticum aestivum L.). The product of this gene controls resistance to aluminium (Al) toxicity. ALMT genes encode transmembrane proteins that function as anion channels and perform multiple functions involving the transport of organic anions (e.g., carboxylates) and inorganic anions in cells. They share a PF11744 domain and are classified in the Fusaric acid resistance protein-like superfamily, CL0307. The proteins typically have five to seven transmembrane regions in the N-terminal half and a long hydrophillic C-terminal tail but predictions of secondary structure vary. Although widely spread in plants, relatively little information is available on the roles performed by other members of this family. In this review, we summarized functions of ALMT gene families, including Al resistance, stomatal function, mineral nutrition, microbe interactions, fruit acidity, light response and seed development.

show abstract

The ALMT Family of Organic Acid Transporters in Plants and Their Involvement in Detoxification and Nutrient Security

Cited by 120 publications

References 90 publications

Breeding Maize for Tolerance to Acidic Soils: A Review

Breeding Maize for Tolerance to Acidic Soils: A Review

Nutrient exchange in arbuscular mycorrhizal symbiosis from a thermodynamic point of view

The ALMT Gene Family Performs Multiple Functions in Plants

Contact Info

Product

Resources

About