Overexpression of MsALMT1, from the Aluminum-Sensitive Medicago sativa, Enhances Malate Exudation and Aluminum Resistance in Tobacco View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2012-12-18

AUTHORS

Qi Chen, Kong-Huan Wu, Ping Wang, Jia Yi, Kun-Zhi Li, Yong-Xiong Yu, Li-Mei Chen

ABSTRACT

Aluminum (Al) toxicity is a major limiting factor for plant growth and crop production in acidic soils. Al-induced organic acid (OA) exudation plays an important role in plant Al resistance. The exudation of OAs is mediated by membrane-localized OA transporters. In our previous study, a gene encoding the Al-induced malate transporter (MsALMT1) was identified in the roots of the Al-sensitive plant Medicago sativa L. cv. Yumu no. 1 (YM1). To further validate the function of MsALMT1, transgenic plants that overexpressed MsALMT1 under the control of the CaMV 35S (35S) promoter were generated. This transgenic tobacco showed an enhanced capacity for malate efflux and better Al resistance than wild type (WT) plants after exposure to 30 μM Al for 24 h. The Al content in the transgenic plant roots decreased to 40–52 % of that in WT plant roots. These results demonstrate that MsALMT1 is an Al-resistant gene in YM1 and encodes a malate transporter, the overexpression of which effectively enhances the Al resistance of transgenic tobacco plants. More... »

PAGES

769-774

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11105-012-0543-2

DOI

http://dx.doi.org/10.1007/s11105-012-0543-2

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1034489175


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