Abstract
The amino acid glutamate (Glu) acts as a fast excitatory neurotransmitter in mammals. Its importance in plant signalling was recognized with the discovery of channel proteins similar to mammalian Glu receptors, as well as distinct changes in root-system architecture in response to very small amounts of soil Glu. Based on natural genetic variation within Arabidopsis, Walch-Liu et al. (2017) have now identified a major locus underpinning this root response, as well as several loci controlling it through gene by environment interactions with nitrate and temperature. It is a significant step towards unraveling crosstalk between signalling pathways that enable plants to adjust their growth and development to multiple environmental stimuli.
Highlights
Bloemen J, McGuire MA, Aubrey DP, Teskey RO, Steppe K. 2013
Based on natural genetic variation within Arabidopsis, Walch-Liu et al (2017) have identified a major locus underpinning this root response, as well as several loci controlling it through gene by environment interactions with nitrate and temperature
The Glu-sensitivity loci GluS1–3 together explain 40% of variation of the Glu response
Summary
Bloemen J, McGuire MA, Aubrey DP, Teskey RO, Steppe K. 2013. Transport of root-respired CO2 via the transpiration stream affects aboveground carbon assimilation and CO2 efflux in trees. Natural variation of root architectural responses to nutrient signals
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