Comparative transcriptomics reveals new insights into melatonin-enhanced drought tolerance in naked oat seedlings

PeerJ

article

Xinjun Zhang¹  Wenting Liu¹  Yaci Lv²  Jing Bai¹  Tianliang Li¹  Xiaohong Yang¹  Liantao Liu³  Haitao Zhou¹ 

[1] Zhangjiakou Academy of Agricultural Sciences;Hengshui University;College of Agronomy, Hebei Agricultural University

关键词: Naked oat;    Transcriptome;    Melatonin;    Drought stress;   

DOI  :  10.7717/peerj.13669

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The growth and development of naked oat (Avena nuda L.) seedlings, a grain recognized as nutritious and healthy, is limited by drought. Melatonin plays a positive role in plants under drought stress. However, its function is unclear in naked oats. This study demonstrated that melatonin enhances drought stress tolerance in oat seedlings. Melatonin application alleviated the declining growth parameters of two naked oat varieties, Huazao No.2 (H2) and Jizhangyou No.15 (J15), under drought stress by increasing the chlorophyll content and photosynthetic rate of leaves. Melatonin pretreatment induced differential gene expression in H2 and J15 under drought stress. Subsequently, the differential gene expression responses to melatonin in the two varieties were further analyzed. The key drought response transcription factors and the regulatory effect of melatonin on drought-related transcription factors were assessed, focusing on genes encoding proteins in the ABA signal transduction pathway, including PYL, PP2C, ABF, SNRK2, and IAA. Taken together, this study provides new insights into the effect and underlying mechanism of melatonin in alleviating drought stress in naked oat seedlings.

【 授权许可】

CC BY