Pan-transcriptome identifying master genes and regulation network in response to drought and salt stresses in Alfalfa (Medicago sativa L.).
Sci Rep
; 11(1): 17203, 2021 08 26.
Article
in En
| MEDLINE
| ID: mdl-34446782
ABSTRACT
Alfalfa is an important legume forage grown worldwide and its productivity is affected by environmental stresses such as drought and high salinity. In this work, three alfalfa germplasms with contrasting tolerances to drought and high salinity were used for unraveling the transcriptomic responses to drought and salt stresses. Twenty-one different RNA samples from different germplasm, stress conditions or tissue sources (leaf, stem and root) were extracted and sequenced using the PacBio (Iso-Seq) and the Illumina platforms to obtain full-length transcriptomic profiles. A total of 1,124,275 and 91,378 unique isoforms and genes were obtained, respectively. Comparative analysis of transcriptomes identified differentially expressed genes and isoforms as well as transcriptional and post-transcriptional modifications such as alternative splicing events, fusion genes and nonsense-mediated mRNA decay events and non-coding RNA such as circRNA and lncRNA. This is the first time to identify the diversity of circRNA and lncRNA in response to drought and high salinity in alfalfa. The analysis of weighted gene co-expression network allowed to identify master genes and isoforms that may play important roles on drought and salt stress tolerance in alfalfa. This work provides insight for understanding the mechanisms by which drought and salt stresses affect alfalfa growth at the whole genome level.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Stress, Physiological
/
Gene Expression Regulation, Plant
/
Gene Expression Profiling
/
Medicago sativa
/
Gene Regulatory Networks
/
Salinity
/
Droughts
Language:
En
Journal:
Sci Rep
Year:
2021
Document type:
Article
Affiliation country:
United States