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Aging in legume symbiosis : a molecular view on nodule senescence in Medicago truncatula

(2006) PLANT PHYSIOLOGY. 141(2). p.711-720
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Abstract
Rhizobia reside as symbiosomes in the infected cells of legume nodules to fix atmospheric nitrogen. The symbiotic relation is strictly controlled, lasts for some time, but eventually leads to nodule senescence. We present a comprehensive transcriptomics study to understand the onset of nodule senescence in the legume Medicago truncatula. Distinct developmental stages with characteristic gene expression were delineated during which the two symbiotic partners were degraded consecutively, marking the switch in nodule tissue status from carbon sink to general nutrient source. Cluster analysis discriminated an early expression group that harbored regulatory genes that might be primary tools to interfere with pod filling-related or stress-induced nodule senescence, ultimately causing prolonged nitrogen fixation. Interestingly, the transcriptomes of nodule and leaf senescence had a high degree of overlap, arguing for the recruitment of similar pathways.
Keywords
PLANTS, ROOT-NODULES, ALFALFA NODULES, NITROGEN-FIXATION, CYSTEINE PROTEINASE, GENE-EXPRESSION, ARABIDOPSIS LEAF SENESCENCE, DATABASE, GENOME-WIDE EXPRESSION, PROTEASE

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Chicago
Van De Velde, Willem, Juan Carlos Pérez Guerra, Annick De Keyser, Riet De Rycke, Stephane Rombauts, Nicolas Maunoury, Peter Mergaert, Eva Kondorosi, Marcella Holsters, and Sofie Goormachtig. 2006. “Aging in Legume Symbiosis : a Molecular View on Nodule Senescence in Medicago Truncatula.” Plant Physiology 141 (2): 711–720.
APA
Van De Velde, Willem, Pérez Guerra, J. C., De Keyser, A., De Rycke, R., Rombauts, S., Maunoury, N., Mergaert, P., et al. (2006). Aging in legume symbiosis : a molecular view on nodule senescence in Medicago truncatula. PLANT PHYSIOLOGY, 141(2), 711–720.
Vancouver
1.
Van De Velde W, Pérez Guerra JC, De Keyser A, De Rycke R, Rombauts S, Maunoury N, et al. Aging in legume symbiosis : a molecular view on nodule senescence in Medicago truncatula. PLANT PHYSIOLOGY. 2006;141(2):711–20.
MLA
Van De Velde, Willem, Juan Carlos Pérez Guerra, Annick De Keyser, et al. “Aging in Legume Symbiosis : a Molecular View on Nodule Senescence in Medicago Truncatula.” PLANT PHYSIOLOGY 141.2 (2006): 711–720. Print.
@article{369362,
  abstract     = {Rhizobia reside as symbiosomes in the infected cells of legume nodules to fix atmospheric nitrogen. The symbiotic relation is strictly controlled, lasts for some time, but eventually leads to nodule senescence. We present a comprehensive transcriptomics study to understand the onset of nodule senescence in the legume Medicago truncatula. Distinct developmental stages with characteristic gene expression were delineated during which the two symbiotic partners were degraded consecutively, marking the switch in nodule tissue status from carbon sink to general nutrient source. Cluster analysis discriminated an early expression group that harbored regulatory genes that might be primary tools to interfere with pod filling-related or stress-induced nodule senescence, ultimately causing prolonged nitrogen fixation. Interestingly, the transcriptomes of nodule and leaf senescence had a high degree of overlap, arguing for the recruitment of similar pathways.},
  author       = {Van De Velde, Willem and P{\'e}rez Guerra, Juan Carlos and De Keyser, Annick and De Rycke, Riet and Rombauts, Stephane and Maunoury, Nicolas and Mergaert, Peter and Kondorosi, Eva and Holsters, Marcella and Goormachtig, Sofie},
  issn         = {0032-0889},
  journal      = {PLANT PHYSIOLOGY},
  keyword      = {PLANTS,ROOT-NODULES,ALFALFA NODULES,NITROGEN-FIXATION,CYSTEINE PROTEINASE,GENE-EXPRESSION,ARABIDOPSIS LEAF SENESCENCE,DATABASE,GENOME-WIDE EXPRESSION,PROTEASE},
  language     = {eng},
  number       = {2},
  pages        = {711--720},
  title        = {Aging in legume symbiosis : a molecular view on nodule senescence in Medicago truncatula},
  url          = {http://dx.doi.org/10.1104/pp.106.078691},
  volume       = {141},
  year         = {2006},
}

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