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Transcriptome analysis of Medicago truncatula leaf senescence: similarities and differences in metabolic and transcriptional regulations as compared with Arabidopsis, nodule senescence and nitric oxide signalling
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Transcriptome analysis of Medicago truncatula leaf senescence: similarities and differences in metabolic and transcriptional regulations as compared with Arabidopsis, nodule senescence and nitric oxide signalling
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Journal Article
Transcriptome analysis of Medicago truncatula leaf senescence: similarities and differences in metabolic and transcriptional regulations as compared with Arabidopsis, nodule senescence and nitric oxide signalling
2009
Overview
Here, for the first time, a comprehensive transcriptomics study is presented of leaf senescence in the legume model Medicago truncatula, providing a broad overview of differentially expressed transcripts involved in this process. The cDNA-amplification fragment length polymorphism (AFLP) technique was used to identify > 500 genes, which were cloned and sorted into functional categories according to their gene ontology annotation. Comparison between the datasets of Arabidopsis and M. truncatula leaf senescence reveals common physiological events but differences in the nitrogen metabolism and in transcriptional regulation. In addition, it was observed that a minority of the genes regulated during leaf senescence were equally involved in other processes leading to programmed cell death, such as nodule senescence and nitric oxide signalling. This study provides a wide transcriptional profile for the comprehension of key events of leaf senescence in M. truncatula and highlights a possible regulative role for MADS box transcription factors in the terminal phases of the process.
Publisher
Oxford, UK : Blackwell Publishing Ltd,Blackwell Publishing,Blackwell Publishing Ltd
Subject
amplified fragment length polymorphism
/ Amplified Fragment Length Polymorphism Analysis
/ Cellular Senescence - drug effects
/ Cellular Senescence - genetics
/ cytology
/ Datasets
/ DNA, Complementary - genetics
/ Gene Expression Regulation, Plant
/ Gene Expression Regulation, Plant - drug effects
/ Genes
/ genetics
/ leaves
/ legume
/ legumes
/ MADS box
/ Medicago truncatula - cytology
/ Medicago truncatula - drug effects
/ Medicago truncatula - genetics
/ Nodules
/ Oxides
/ Plants
/ Reverse transcriptase polymerase chain reaction
/ Root Nodules, Plant - drug effects
/ Root Nodules, Plant - genetics
/ Signal Transduction - drug effects
