1
|
Li CY, Hu SY, Yang WT, Yang HZ, Zhang WW, Ye JH, Zheng XQ, Liang YR, Dong ZB, Lu JL. Conversion obstacle from Mg-protoporphyrin IX to protochlorophyllide might be responsible for chlorophyll-deficient phenotype of the Huangjinya's albino offspring. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 212:108778. [PMID: 38838570 DOI: 10.1016/j.plaphy.2024.108778] [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: 03/24/2024] [Revised: 04/30/2024] [Accepted: 05/27/2024] [Indexed: 06/07/2024]
Abstract
The albino tea cultivar is one of the most important germplasms for key gene mining and high-quality tea producing. In order to elucidate the chlorophyll-deficient mechanism of albino cultivar 'Huangjinya' and its offspring, color difference, photosynthetic pigments and the relevant genes' expression of the tender shoots were comprehensively investigated in this study. Among the tested 16 offspring, 5 exhibited albino phenotype in spring and autumn, 3 showed albino phenotype in spring but normal green in autumn, while the rests were all normal green. The shoot of albino offspring had significantly higher lightness and/or yellowness than that of green ones, and possessed dramatically lower photosynthetic pigments and chlorophyll precursor protochlorophyllide (Pchlide), as well as higher chlorophyll a/chlorophyll b but lower chlorophylls/carotenoids in comparison with green ones. Among the tested genes involved in chlorophyll and carotenoid metabolism pathways, expression of the magnesium protoporphyrin IX monomethyl ester cyclase (CRD), 3,8-divinyl chlorophyllide 8-vinyl reductase (DVR), 5-aminolevulinate dehydratase 1 (HEMB1), 1-deoxy-D-xylulose 5-phosphate synthase 1 (DXS1) and 4-hydroxy-3-methylbut-2-enyl diphosphate reductase (ISPH) was remarkably down-regulated in shoots of the albino offspring. Color difference indices of the offspring were significantly correlated with the levels of photosynthetic pigments and Pchlide, and low level of chlorophylls in shoot of albino offspring was mainly due to conversion obstacle from magnesium protoporphyrin Ⅸ (Mg-Proto IX) to Pchlide which might be attributed to down-regulatory expression of CRD and DVR.
Collapse
Affiliation(s)
- Cun-Yu Li
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Si-Yi Hu
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Wen-Ting Yang
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China; Shanghai East Pudong Foreign Language School, Shanghai, 201203, PR China.
| | - Hong-Zhiyuan Yang
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Wen-Wen Zhang
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Jian-Hui Ye
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Xin-Qiang Zheng
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Yue-Rong Liang
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| | - Zhan-Bo Dong
- Agricultural and Rural Bureau of Pingyang County, Wenzhou, 325405, PR China.
| | - Jian-Liang Lu
- Tea Research Institute, Zhejiang University, Hangzhou, 310058, PR China.
| |
Collapse
|
2
|
Fan YG, Zhao TT, Xiang QZ, Han XY, Yang SS, Zhang LX, Ren LJ. Multi-Omics Research Accelerates the Clarification of the Formation Mechanism and the Influence of Leaf Color Variation in Tea ( Camellia sinensis) Plants. PLANTS (BASEL, SWITZERLAND) 2024; 13:426. [PMID: 38337959 PMCID: PMC10857240 DOI: 10.3390/plants13030426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/24/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024]
Abstract
Tea is a popular beverage with characteristic functional and flavor qualities, known to be rich in bioactive metabolites such as tea polyphenols and theanine. Recently, tea varieties with variations in leaf color have been widely used in agriculture production due to their potential advantages in terms of tea quality. Numerous studies have used genome, transcriptome, metabolome, proteome, and lipidome methods to uncover the causes of leaf color variations and investigate their impacts on the accumulation of crucial bioactive metabolites in tea plants. Through a comprehensive review of various omics investigations, we note that decreased expression levels of critical genes in the biosynthesis of chlorophyll and carotenoids, activated chlorophyll degradation, and an impaired photosynthetic chain function are related to the chlorina phenotype in tea plants. For purple-leaf tea, increased expression levels of late biosynthetic genes in the flavonoid synthesis pathway and anthocyanin transport genes are the major and common causes of purple coloration. We have also summarized the influence of leaf color variation on amino acid, polyphenol, and lipid contents and put forward possible causes of these metabolic changes. Finally, this review further proposes the research demands in this field in the future.
Collapse
Affiliation(s)
- Yan-Gen Fan
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; (Y.-G.F.); (T.-T.Z.); (Q.-Z.X.); (X.-Y.H.)
| | - Ting-Ting Zhao
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; (Y.-G.F.); (T.-T.Z.); (Q.-Z.X.); (X.-Y.H.)
| | - Qin-Zeng Xiang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; (Y.-G.F.); (T.-T.Z.); (Q.-Z.X.); (X.-Y.H.)
| | - Xiao-Yang Han
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; (Y.-G.F.); (T.-T.Z.); (Q.-Z.X.); (X.-Y.H.)
| | - Shu-Sen Yang
- Yipinming Tea Planting Farmers Specialized Cooperative, Longnan 746400, China;
| | - Li-Xia Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; (Y.-G.F.); (T.-T.Z.); (Q.-Z.X.); (X.-Y.H.)
| | - Li-Jun Ren
- College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; (Y.-G.F.); (T.-T.Z.); (Q.-Z.X.); (X.-Y.H.)
| |
Collapse
|