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Physiological and transcriptomic analysis highlight key metabolic pathways in relation to drought tolerance in Rhododendron delavayi
Cai, Yan-Fei1,2; Wang, Ji-Hua1,2; Zhang, Lu1,2; Song, Jie1,2; Peng, Lv-Chun1,2; Zhang, Shi-Bao3
Corresponding AuthorZhang, Shi-Bao(sbzhang@mail.kib.ac.cn)
2019-07-01
Source PublicationPHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
ISSN0971-5894
Volume25Issue:4Pages:991-1008
AbstractRhododendron delavayi is an alpine evergreen ornamental plant, but water shortage limits its growth and development in urban gardens. However, the adaptive mechanism of alpine evergreen rhododendrons to drought remains unclear. Here, a water control experiment was conducted to study the physiological and transcriptomic response of R. delavayi to drought. The drought treatment for 9days decreased photosynthetic rate, induced accumulation of reactive oxygen species (ROS), and damaged chloroplast ultrastructure of R. delavayi. However, the photosynthetic rate quickly recovered to the level before treatment when the plants were re-watered. De novo assembly of RNA-Seq data generated 86,855 unigenes with an average length of 1870bp. A total of 22,728 differentially expressed genes (DEGs) were identified between the control and drought plants. The expression of most DEGs related to photosynthesis were down-regulated during drought stress, and were up-regulated when the plants were re-watered, including the DEGs encoding subunits of light-harvesting chlorophyll-protein complex, photosystem II and photosystem I reaction center pigment-protein complexes, and photosynthetic electron transport. The expressions of many DEGs related to signal transduction, flavonoid biosynthesis and antioxidant activity were also significantly affected by drought stress. The results indicated that the response of R. delavayi to drought involved multiple physiological processes and metabolic pathways. Photosynthetic adjustment, ROS-scavenging system, abscisic acid and brassinosteroid signal transduction pathway may play important roles to improve drought tolerance of R. delavayi. Our findings provided valuable information for understanding the mechanisms of drought tolerance employed by Rhododendron species.
KeywordDrought Photosynthesis Photoprotection Transcriptome Rhododendron delavayi
DOI10.1007/s12298-019-00685-1
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000477040400015
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/68224
Collection资源植物与生物技术所级重点实验室
Corresponding AuthorZhang, Shi-Bao
Affiliation1.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Yunnan, Peoples R China
2.Natl Engn Res Ctr Ornamental Hort, Kunming 650205, Yunnan, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
Recommended Citation
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Cai, Yan-Fei,Wang, Ji-Hua,Zhang, Lu,et al. Physiological and transcriptomic analysis highlight key metabolic pathways in relation to drought tolerance in Rhododendron delavayi[J]. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS,2019,25(4):991-1008.
APA Cai, Yan-Fei,Wang, Ji-Hua,Zhang, Lu,Song, Jie,Peng, Lv-Chun,&Zhang, Shi-Bao.(2019).Physiological and transcriptomic analysis highlight key metabolic pathways in relation to drought tolerance in Rhododendron delavayi.PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS,25(4),991-1008.
MLA Cai, Yan-Fei,et al."Physiological and transcriptomic analysis highlight key metabolic pathways in relation to drought tolerance in Rhododendron delavayi".PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS 25.4(2019):991-1008.
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