%0 Journal Article
%T Aluminum-activated root malate and citrate exudation is independent of NIP1;2-facilitated root-cell-wall aluminum removal in Arabidopsis
%A Jiping Liu
%A Yanfei Cai
%A Yu Cao
%A Yuqi Wang
%J Archive of "Plant Signaling & Behavior".
%D 2018
%R 10.1080/15592324.2017.1422469
%X In Arabidopsis, aluminum (Al) exclusion from the root is mainly facilitated by Al-activated root malate and citrate exudation through the ALMT1 malate transporter and the MATE citrate transporter, respectively. However, the nature of an internal Al tolerance mechanism remains largely unknown. In a recent study, we showed that NIP1;2 facilitates Al-malate transport from the root cell wall into the root symplasm and subsequent root-to-shoot translocation and thus NIP1;2 plays key roles in Al detoxification and internal tolerance in Arabidopsis. We discovered that the NIP1;2-mediated Al removal from the root cell wall requires a functional ALMT1-mediated malate exudation system, which allows the formation of an Al-malate complex in the root cell wall. Thus, a coordinated function between the exclusion and the internal resistance mechanisms, linked by the ALMT1-mediated root malate exudation and the NIP1;2-mediated Al uptake system, is critical for Al resistance in Arabidopsis
%K Acid soils
%K aluminum toxicity
%K aluminum tolerance
%K organic acids
%K aquaporin
%K ALMT1
%K MATE
%K NIP1
%K 2
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5790415/