Comparative physiological and root transcriptome analysis of two annual ryegrass cultivars under drought stress.

Autor: Cheng SB; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Yang XZ; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Zou L; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Wu DD; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Lu JL; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; College of Grassland Science and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Cheng YR; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Wang Y; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Zeng J; College of Resources, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Kang HY; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Sha LN; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; College of Grassland Science and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Fan X; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Ma X; College of Grassland Science and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Zhang XQ; College of Grassland Science and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Zhou YH; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; Triticeae Research Institute, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China., Zhang HQ; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China; College of Grassland Science and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China. Electronic address: haiqinzhang@163.com.
Jazyk: angličtina
Zdroj: Journal of plant physiology [J Plant Physiol] 2022 Oct; Vol. 277, pp. 153807. Date of Electronic Publication: 2022 Sep 06.
DOI: 10.1016/j.jplph.2022.153807
Abstrakt: Annual ryegrass is a widely cultivated forage grass with rapid growth and high productivity. However, drought is one of the abiotic stresses affecting ryegrass growth and quality. In this study, we compared the physiological and transcriptome responses of Chuansi No.1 (drought-tolerant, DT) and Double Barrel (drought-sensitive, DS) under drought stress simulated by PEG-6000 for 7 days. The results showed that Chuansi No. 1 had stronger physiological and biochemical parameters such as root properties, water content, osmotic adjustment ability and antioxidant ability. In addition, RNA-seq was used to elucidate the molecular mechanism of root drought resistance. We identified 8588 differentially expressed genes related to drought tolerance in root, which were mainly enriched in oxidation-reduction process, carbohydrate metabolic process, apoplast, arginine and proline metabolism, and phenylpropanoid biosynthesis pathways. The expression levels of DEGs were consistent with physiological changes of ryegrass under drought stress. We found that genes related to sucrose and starch synthesis, root development, osmotic adjustment, ABA signal regulation and specifically up-regulated transcription factors such as WRKY41, WRKY51, ERF7, ERF109, ERF110, NAC43, NAC68, bHLH162 and bHLH148 in Chuansi No. 1 may be the reason for its higher drought tolerance. This study revealed the underlying physiological and molecular mechanisms of root response to drought stress in ryegrass and provided some new candidate genes for breeding rye drought tolerant varieties.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier GmbH. All rights reserved.)
Databáze: MEDLINE
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