Polymorphic responses of Medicago truncatula accessions to potassium deprivation.
Potassium (K+) is an essential macronutrient for plants and the most abundant cation in cells. Due to variable K+availability in the environment, plants must be able to adjust their developmental, physiological and transcriptional responses. The plant development to K+deprivation was not well studied in legumes thus far. We recently described the first adaptation mechanisms of the model legume Medicago truncatula Jemalong A17 to long-term K+deprivation and analyzed these responses in the context of arbuscular mycorrhizal symbiosis. Here we report polymorphic growth variations of two genetically very different accessions of M. truncatula to K+-limiting conditions, Jemalong A17, and the Tunisian accession Tn11.1. The faster adaptation of Tn11.1 than A17 to K+shortage might be due to its greater adaptation to saline soils. Examining in a more systematic way the developmental adaptation of various M. truncatula accessions to K+deprivation will provide a better understanding of how legume evolved to cope with this stressful condition.
a Department of Bacteriology , University of Wisconsin-Madison , Madison , WI , USA.
Kevin
K
Garcia
a Department of Bacteriology , University of Wisconsin-Madison , Madison , WI , USA.|b Department of Agronomy , University of Wisconsin-Madison , Madison , WI , USA.
Jean-Michel
JM
Ané
D007887:Fabaceae / Q000235:genetics / Q000378:metabolism* / Q000382:microbiology; D018506:Gene Expression Regulation, Plant / Q000235:genetics / Q000502:physiology; D046913:Medicago truncatula / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D038821:Mycorrhizae / Q000502:physiology; D011188:Potassium / Q000378:metabolism*; D017382:Reactive Oxygen Species / Q000378:metabolism
D017382:Reactive Oxygen Species; D011188:Potassium
Development; Medicago truncatula; legumes; potassium; reactive oxygen species