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Gao J, Duan M, Hasi G, Yang J, Yan C, Kang Y, Qi Z. Comparison of two contrasting Leymus chinensis accessions reveals the roles of the cell wall and auxin in rhizome development. JOURNAL OF PLANT PHYSIOLOGY 2023; 287:154003. [PMID: 37301035 DOI: 10.1016/j.jplph.2023.154003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/01/2023] [Accepted: 05/06/2023] [Indexed: 06/12/2023]
Abstract
Leymus chinensis, a perennial native forage grass, is widely distributed in the steppes of Inner Mongolia as the dominant species. The main reproductive strategy of this grass is clonal propagation, which occurs via the proliferation of subterranean horizontal stems known as rhizomes. To elucidate the mechanism underlying rhizome development in this grass, we collected 60 accessions of L. chinensis and evaluated their rhizome development. One accession, which we named SR-74 (Strong Rhizomes), had significantly better rhizome development capacity than the accession WR-16 (Weak Rhizomes) in terms of rhizome number, total and primary rhizome length, and number of rhizome seedlings. Rhizome elongation was positively correlated with the number of internodes in the rhizome, which affected plant biomass. Compared to WR-16, SR-74 had higher rhizome tip hardness, higher abundance of transcripts participating in the biosynthesis of cell wall components, and higher levels of the metabolites L-phenylalanine, trans-cinnamic acid, 3-coumaric acid, ferulic acid, and coniferin. These metabolites in the phenylpropanoid biosynthesis pathway are precursors of lignin. In addition, SR-74 rhizomes contained higher amounts of auxin and auxin metabolites, including L-Trp, IPA, IBA, IAA and IAA-Asp, as well as upregulated expression of the auxin biosynthesis and signaling genes YUCCA6, YUCCA8, YUCCA10, YUCCA11, PIN1, PIN2, UGT1, UGT2, UGT4, UGT10, GH3, IAA7, IAA23, and IAA30. We propose a network between auxin signaling and the cell wall underlying rhizome development in L. chinensis.
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Affiliation(s)
- Jie Gao
- Key Laboratory of Forage and Endemic Crop Biology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, China
| | - Menglu Duan
- Key Laboratory of Forage and Endemic Crop Biology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, China
| | - Gaowa Hasi
- Grassland Work Station of East Ujimqin Banner of Xilin Gol League of Inner Mongolia, East Ujimqin Banner, 026300, China
| | - Jia Yang
- Key Laboratory of Forage and Endemic Crop Biology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, China
| | - Chunxia Yan
- Key Laboratory of Forage and Endemic Crop Biology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, China.
| | - Yan Kang
- Key Laboratory of Forage and Endemic Crop Biology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, China.
| | - Zhi Qi
- Key Laboratory of Forage and Endemic Crop Biology, Ministry of Education, School of Life Sciences, Inner Mongolia University, Hohhot, 010010, China.
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Zhang H, Zhang Y, Wang MY, Chen S, Li XB. The chemical constituents with cytotoxicity from Urtica fissa seed. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2019; 21:1068-1074. [PMID: 30693804 DOI: 10.1080/10286020.2018.1563074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/14/2018] [Accepted: 12/16/2018] [Indexed: 06/09/2023]
Abstract
Phytochemical investigation of Urtica fissa seed led to the isolation of a new secolignan (1) and a new glycoalkaloid (2), together with 16 known compounds (3-18). The subsequent active evaluation indicated that two lignans (1, 12), two ceramides (3, 4), and the glycoalkaloid (2) possessed the significant cytotoxicity. They could obviously inhibit the proliferation of tumor cells HeLa and CCRF-CEM cells, with IC50 values as low as 1.5 μM.
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Affiliation(s)
- Hao Zhang
- School of Pharmacy, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Ying Zhang
- School of Pharmacy, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Meng-Yue Wang
- School of Pharmacy, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Shuo Chen
- School of Pharmacy, Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Xiao-Bo Li
- School of Pharmacy, Shanghai Jiao Tong University , Shanghai 200240 , China
- Ethnomedicine Research Centre, Shanghai Jiao Tong University Yunnan Research Institute , Dali 671000 , China
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