A cytokinin receptor homologue is induced during root nodule organogenesis and senescence in Lupinus albus L.
Here we report the isolation of a new cytokinin receptor homologue, LaHK1, from lupin (Lupinus albus) root nodules. LaHK1 transcript accumulation was detected in different plant organs, and expression was analyzed throughout nodule development. We observed notably higher expression in nodule primordia and young nodules compared to the root or to mature nodules. We also detected elevated transcript accumulation in naturally senescent nodules and in senescent nodules subjected to foliar dark stress. The results could be an indication of a putative role of this cytokinin receptor homologue in nodule development, from morphogenesis through senescence.
Department of Plant Physiology and Ecology, Instituto de Recursos Naturales, Centro de Ciencias Medioambientales, CSIC, Serrano 115-bis, E-28006 Madrid, Spain.
Teodoro
T
Coba de la Peña
Claudia B
CB
Cárcamo
Luis
L
Almonacid
Angel
A
Zaballos
M Mercedes
MM
Lucas
Dimitrios
D
Balomenos
José J
JJ
Pueyo
D000595:Amino Acid Sequence; D003583:Cytokinins / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant; D031297:Lupinus / Q000235:genetics* / Q000254:growth & development; D008969:Molecular Sequence Data; D010802:Phylogeny; D010940:Plant Proteins / Q000145:classification / Q000235:genetics* / Q000502:physiology; D011956:Receptors, Cell Surface / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D053204:Root Nodules, Plant / Q000235:genetics* / Q000254:growth & development; D017386:Sequence Homology, Amino Acid
D003583:Cytokinins; D010940:Plant Proteins; D011956:Receptors, Cell Surface