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Global transcriptome profiling analysis reveals insight into saliva-responsive genes in alfalfa
Wenxian Liu1, Zhengshe Zhang1, Shuangyan Chen2
1State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China.
Plant Cell Reports
|December 10, 2015
Summary
Cow saliva negatively impacts alfalfa regrowth by inducing stress responses. This study reveals molecular mechanisms affecting plant-herbivore interactions and alfalfa
Area of Science:
- Plant science
- Molecular biology
- Genomics
Background:
- Saliva deposition is crucial in plant-herbivore interactions during grazing.
- Alfalfa (Medicago sativa), a key forage legume, often lacks grazing tolerance.
- Previous studies on saliva's effect on plant regrowth yielded inconsistent results.
Purpose of the Study:
- To investigate the genome-wide transcriptome dynamics in alfalfa following cow saliva deposition.
- To elucidate the molecular mechanisms underlying alfalfa's response to saliva stress.
- To understand how saliva impacts alfalfa regrowth and grazing tolerance.
Main Methods:
- Transcriptome sequencing of alfalfa seedlings at multiple time points (0, 4, 8, 24 hours) post-saliva treatment.
- Identification and annotation of unigenes.
- Differential gene expression analysis.
- Metabolic pathway enrichment analysis.
Main Results:
- 53,195 annotated unigenes were identified, with 4,814 showing significant differential expression.
- Saliva deposition significantly altered gene expression related to jasmonic acid synthesis.
- Gene expression changes indicated increased susceptibility to pathogens and reduced ribosomal protein synthesis.
Conclusions:
- Saliva deposition acts as a stressor, negatively affecting alfalfa regrowth.
- Molecular pathways modified by saliva include defense responses and growth-related processes.
- These findings provide insights into alfalfa's response to grazing at the transcriptome level.
