Genome-Wide Expression Analysis of Root Tips in Contrasting Rice Genotypes Revealed Novel Candidate Genes for Water Stress Adaptation.
RNAseq
rice
root system architecture
root tip
transcriptome
water stress
Journal
Frontiers in plant science
ISSN: 1664-462X
Titre abrégé: Front Plant Sci
Pays: Switzerland
ID NLM: 101568200
Informations de publication
Date de publication:
2022
2022
Historique:
received:
09
10
2021
accepted:
05
01
2022
entrez:
10
3
2022
pubmed:
11
3
2022
medline:
11
3
2022
Statut:
epublish
Résumé
Root system architecture (RSA) is an important agronomic trait with vital roles in plant productivity under water stress conditions. A deep and branched root system may help plants to avoid water stress by enabling them to acquire more water and nutrient resources. Nevertheless, our knowledge of the genetics and molecular control mechanisms of RSA is still relatively limited. In this study, we analyzed the transcriptome response of root tips to water stress in two well-known genotypes of rice: IR64, a high-yielding lowland genotype, which represents a drought-susceptible and shallow-rooting genotype; and Azucena, a traditional, upland, drought-tolerant and deep-rooting genotype. We collected samples from three zones (Z) of root tip: two consecutive 5 mm sections (Z1 and Z2) and the following next 10 mm section (Z3), which mainly includes meristematic and maturation regions. Our results showed that Z1 of Azucena was enriched for genes involved in cell cycle and division and root growth and development whereas in IR64 root, responses to oxidative stress were strongly enriched. While the expansion of the lateral root system was used as a strategy by both genotypes when facing water shortage, it was more pronounced in Azucena. Our results also suggested that by enhancing meristematic cell wall thickening for insulation purposes as a means of confronting stress, the sensitive IR64 genotype may have reduced its capacity for root elongation to extract water from deeper layers of the soil. Furthermore, several members of gene families such as
Identifiants
pubmed: 35265092
doi: 10.3389/fpls.2022.792079
pmc: PMC8899714
doi:
Types de publication
Journal Article
Langues
eng
Pagination
792079Informations de copyright
Copyright © 2022 Abdirad, Ghaffari, Majd, Irian, Soleymaniniya, Daryani, Koobaz, Shobbar, Farsad, Yazdanpanah, Sadri, Mirzaei, Ghorbanzadeh, Kazemi, Hadidi, Haynes and Salekdeh.
Déclaration de conflit d'intérêts
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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