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Jinqiu Y, Bing L, Tingting S, Jinglei H, Zelai K, Lu L, Wenhua H, Tao H, Xinyu H, Zengqing L, Guowen C, Yajun C. Integrated Physiological and Transcriptomic Analyses Responses to Altitude Stress in Oat ( Avena sativa L.). Front Genet 2021; 12:638683. [PMID: 34220929 PMCID: PMC8248544 DOI: 10.3389/fgene.2021.638683] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/23/2021] [Indexed: 12/17/2022] Open
Abstract
Oat is an annual gramineous forage grass with the remarkable ability to survive under various stressful environments. However, understanding the effects of high altitude stresses on oats is poor. Therefore, the physiological and the transcriptomic changes were analyzed at two sites with different altitudes, low (ca. 2,080 m) or high (ca. 2,918 m), respectively. Higher levels of antioxidant enzyme activity, reactive oxygen and major reductions in photosynthesis-related markers were suggested for oats at high altitudes. Furthermore, oat yields were severely suppressed at the high altitude. RNA-seq results showed that 11,639 differentially expressed genes were detected at both the low and the high altitudes in which 5,203 up-regulated and 6,436 down-regulated. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment tests were conducted and a group of major high altitude-responsive pigment metabolism genes, photosynthesis, hormone signaling, and cutin, suberine and wax biosynthesis were excavated. Using quantitative real-time polymerase chain response, we also confirmed expression levels of 20 DEGs (qRT-PCR). In summary, our study generated genome-wide transcript profile and may be useful for understanding the molecular mechanisms of Avena sativa L. in response to high altitude stress. These new findings contribute to our deeper relevant researches on high altitude stresses and further exploring new candidategenes for adapting plateau environment oat molecular breeding.
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Affiliation(s)
- Yu Jinqiu
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Li Bing
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Song Tingting
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - He Jinglei
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - KongLing Zelai
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Lian Lu
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - He Wenhua
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Hai Tao
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Huang Xinyu
- Heilongjiang Academy of Agricultural Sciences, Qiqihar, China
| | - Liu Zengqing
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Cui Guowen
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Chen Yajun
- Department of Grassland Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
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Xiang CL, Pan HL, Min DZ, Zhang DG, Zhao F, Liu B, Li B. Rediscovery of Mazus lanceifolius reveals a new genus and a new species in Mazaceae. PHYTOKEYS 2021; 171:1-24. [PMID: 33510572 PMCID: PMC7806577 DOI: 10.3897/phytokeys.171.61926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Mazus lanceifolius (Mazaceae) is a perennial herb with opposite leaves and endemic to central China that has not been collected for 130 years. Rediscovery of this enigmatic species in the wild allows for determination of its phylogenetic position within Mazaceae. Phylogenetic reconstruction of Mazaceae based on DNA sequences from four plastid markers (matK, rbcL, rps16 and trnL-trnF) and nuclear ribosome ITS consistently showed that Mazus was not monophyletic. Mazus lanceifolius is in the most basal clade within Mazaceae, as sister to the remaining species of three recognized genera Dodartia, Lancea and Mazus. These results support the separation of M. lanceifolius from Mazus as a new genus, which was established here as Puchiumazus Bo Li, D.G. Zhang & C.L. Xiang. Meanwhile, a collection from Shennongjia Forestry District of Hubei Province, China, misidentified as "M. lanceifolius" in previous molecular study, is here revealed to represent an undescribed species of Mazus, i.e., M. fruticosus Bo Li, D.G. Zhang & C.L. Xiang, sp. nov. Morphologically, Puchiumazus is clearly distinct from the other three genera by having quadrangular to somewhat ribbed stems, and obviously opposite leaves. In addition, we provide a taxonomic key to the four genera of Mazaceae.
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Affiliation(s)
- Chun-Lei Xiang
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, ChinaKunming Institute of Botany, Chinese Academy of SciencesKunmingChina
| | - Hong-Li Pan
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, ChinaKunming Institute of Botany, Chinese Academy of SciencesKunmingChina
| | - Dao-Zhang Min
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, ChinaKunming Institute of Botany, Chinese Academy of SciencesKunmingChina
| | - Dai-Gui Zhang
- Key Laboratory of Plant Resources Conservation and Utilization, Jishou University, Jishou 416000, ChinaJishou UniversityJishouChina
| | - Fei Zhao
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, ChinaKunming Institute of Botany, Chinese Academy of SciencesKunmingChina
| | - Bing Liu
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, ChinaInstitute of Botany, Chinese Academy of SciencesBeijingChina
- Sino-African Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, ChinaSino-African Joint Research Center, Chinese Academy of SciencesWuhanChina
| | - Bo Li
- Research Centre of Ecological Sciences, College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, ChinaJiangxi Agricultural UniversityNanchangChina
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