1
|
Qin H, Guo J, Jin Y, Li Z, Chen J, Bie Z, Luo C, Peng F, Yan D, Kong Q, Liang F, Zhang H, Hu X, Cui R, Cui X. Integrative analysis of transcriptome and metabolome provides insights into the mechanisms of leaf variegation in Heliopsis helianthoides. BMC PLANT BIOLOGY 2024; 24:731. [PMID: 39085772 PMCID: PMC11290119 DOI: 10.1186/s12870-024-05450-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 07/23/2024] [Indexed: 08/02/2024]
Abstract
BACKGROUND In the field of ornamental horticulture, phenotypic mutations, particularly in leaf color, are of great interest due to their potential in developing new plant varieties. The introduction of variegated leaf traits in plants like Heliopsis helianthoides, a perennial herbaceous species with ecological adaptability, provides a rich resource for molecular breeding and research on pigment metabolism and photosynthesis. We aimed to explore the mechanism of leaf variegation of Heliopsis helianthoides (using HY2021F1-0915 variegated mutant named HY, and green-leaf control check named CK in 2020 April, May and June) by analyzing the transcriptome and metabolome. RESULTS Leaf color and physiological parameters were found to be significantly different between HY and CK types. Chlorophyll content of HY was lower than that of CK samples. Combined with the result of Weighted Gene Co-expression Network Analysis (WGCNA), 26 consistently downregulated differentially expressed genes (DEGs) were screened in HY compared to CK subtypes. Among the DEGs, 9 genes were verified to be downregulated in HY than CK by qRT-PCR. The reduction of chlorophyll content in HY might be due to the downregulation of FSD2. Low expression level of PFE2, annotated as ferritin-4, might also contribute to the interveinal chlorosis of HY. Based on metabolome data, differential metabolites (DEMs) between HY and CK samples were significantly enriched on ABC transporters in three months. By integrating DEGs and DEMs, they were enriched on carotenoids pathway. Downregulation of four carotenoid pigments might be one of the reasons for HY's light color. CONCLUSION FSD2 and PFE2 (ferritin-4) were identified as key genes which likely contribute to the reduced chlorophyll content and interveinal chlorosis observed in HY. The differential metabolites were significantly enriched in ABC transporters. Carotenoid biosynthesis pathway was highlighted with decreased pigments in HY individuals. These findings not only enhance our understanding of leaf variegation mechanisms but also offer valuable insights for future plant breeding strategies aimed at preserving and enhancing variegated-leaf traits in ornamental plants.
Collapse
Affiliation(s)
- Helan Qin
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China.
| | - Jia Guo
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Yingshan Jin
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Zijing Li
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Ju Chen
- Beijing Florascape Co., Ltd, No.2 Wenxing Dong Street, Xicheng District, Beijing, 100044, China
| | - Zhengwei Bie
- Beijing Qunfangpu Horticulture Co., Ltd, No.19 Madian East Road, Haidian District, Beijing, 100088, China
| | - Chunyu Luo
- Beijing Lv Xing Landscaping Co., Ltd, Zhangjiawan Town, Tongzhou District, Beijing, 101117, China
| | - Feitong Peng
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Dongyan Yan
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Qinggang Kong
- Beijing Florascape Co., Ltd, No.2 Wenxing Dong Street, Xicheng District, Beijing, 100044, China
| | - Fang Liang
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Hua Zhang
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Xuefan Hu
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Rongfeng Cui
- Beijing Key Laboratory of Greening Plants Breeding/Beijing Academy of Forestry and Landscape Architecture, No.7 Huajiadi, Chaoyang District, Beijing, 100102, China
| | - Xiuna Cui
- Beijing Florascape Co., Ltd, No.2 Wenxing Dong Street, Xicheng District, Beijing, 100044, China
| |
Collapse
|
2
|
Wang T, Xu D, Zhang F, Yan T, Li Y, Wang Z, Xie Y, Zhuang W. Changes in Photosynthetic Characteristics between Green-Leaf Poplar Linn. "2025" and Its Bud-Sporting Colored-Leaf Cultivars. Int J Mol Sci 2024; 25:1225. [PMID: 38279223 PMCID: PMC10816277 DOI: 10.3390/ijms25021225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/28/2024] Open
Abstract
Colored-leaf poplar is increasingly popular due to its great ornamental values and application prospects. However, the photosynthetic characteristics of these colored-leaf cultivars have not been well understood. In this study, the photosynthetic differences between green-leaf poplar Populus deltoids Linn. "2025" (L2025) and colored-leaf cultivars 'Zhonghong poplar' (ZHP), 'Quanhong poplar' (QHP), and 'Caihong poplar' (CHP) were investigated on several levels, including chloroplast ultrastructure observation, photosynthetic physiological characteristics, and expression analysis of key genes. The results showed that the photosynthetic performance of ZHP was basically consistent with that of L2025, while the ranges of light energy absorption and efficiency of light energy utilization decreased to different degrees in CHP and QHP. A relatively low water use efficiency and high dark respiration rate were observed in QHP, suggesting a relatively weak environmental adaptability. The differences in chloroplast structure in different colored-leaf poplars were further observed by transmission electron microscopy. The disorganization of thylakoid in CHP was considered an important reason, resulting in a significant decrease in chlorophyll content compared with other poplar cultivars. Interestingly, CHP exhibited extremely high photosynthetic electron transport activity and photochemical efficiency, which were conductive to maintaining its relatively high photosynthetic performance. The actual quantum yield of PSII photochemistry of ZHP was basically the same as that of QHP, while the relatively high photosynthetic performance indexes in ZHP suggested a more optimized photosynthetic apparatus, which was crucial for the improvement of photosynthetic efficiency. The differential expressions of a series of key genes in different colored-leaf poplars provided a reasonable explanation for anthocyanin accumulation and specific photosynthetic processes.
Collapse
Affiliation(s)
- Tao Wang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
| | - Donghuan Xu
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing 210037, China;
| | - Fan Zhang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing 210037, China;
| | - Tengyue Yan
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
| | - Yuhang Li
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
| | - Zhong Wang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
| | - Yinfeng Xie
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing 210037, China;
| | - Weibing Zhuang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China; (T.W.); (D.X.); (F.Z.); (T.Y.); (Y.L.); (Z.W.)
| |
Collapse
|
3
|
Yang Y, Chen M, Zhang W, Zhu H, Li H, Niu X, Zhou Z, Hou X, Zhu J. Metabolome combined with transcriptome profiling reveals the dynamic changes in flavonoids in red and green leaves of Populus × euramericana 'Zhonghuahongye'. FRONTIERS IN PLANT SCIENCE 2023; 14:1274700. [PMID: 38179486 PMCID: PMC10764563 DOI: 10.3389/fpls.2023.1274700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 12/04/2023] [Indexed: 01/06/2024]
Abstract
Flavonoids are secondary metabolites that have economic value and are essential for health. Poplar is a model perennial woody tree that is often used to study the regulatory mechanisms of flavonoid synthesis. We used a poplar bud mutant, the red leaf poplar variety 2025 (Populus × euramericana 'Zhonghuahongye'), and green leaves as study materials and selected three stages of leaf color changes for evaluation. Phenotypic and biochemical analyses showed that the total flavonoid, polyphenol, and anthocyanin contents of red leaves were higher than those of green leaves in the first stage, and the young and tender leaves of the red leaf variety had higher antioxidant activity. The analyses of widely targeted metabolites identified a total of 273 flavonoid metabolites (114 flavones, 41 flavonols, 34 flavonoids, 25 flavanones, 21 anthocyanins, 18 polyphenols, 15 isoflavones, and 5 proanthocyanidins). The greatest difference among the metabolites was found in the first stage. Most flavonoids accumulated in red leaves, and eight anthocyanin compounds contributed to red leaf coloration. A comprehensive metabolomic analysis based on RNA-seq showed that most genes in the flavonoid and anthocyanin biosynthetic pathways were differentially expressed in the two types of leaves. The flavonoid synthesis genes CHS (chalcone synthase gene), FLS (flavonol synthase gene), ANS (anthocyanidin synthase gene), and proanthocyanidin synthesis gene LAR (leucoanthocyanidin reductase gene) might play key roles in the differences in flavonoid metabolism. A correlation analysis of core metabolites and genes revealed several candidate regulators of flavonoid and anthocyanin biosynthesis, including five MYB (MYB domain), three bHLH (basic helix-loop-helix), and HY5 (elongated hypocotyl 5) transcription factors. This study provides a reference for the identification and utilization of flavonoid bioactive components in red-leaf poplar and improves the understanding of the differences in metabolism and gene expression between red and green leaves at different developmental stages.
Collapse
Affiliation(s)
- Yun Yang
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, Henan, China
- Key Laboratory of Non-timber Forest Germplasm Enhancement and Utilization of National Forestry and Grassland Administration, Zhengzhou, Henan, China
| | - Mengjiao Chen
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, Guangdong, China
| | - Wan Zhang
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, Henan, China
- College of Forestry, Henan Agricultural University, Zhengzhou, Henan, China
| | - Haiyang Zhu
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, Henan, China
- College of Forestry, Henan Agricultural University, Zhengzhou, Henan, China
| | - Hui Li
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, Henan, China
- Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing, China
| | - Xinjiang Niu
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, Henan, China
| | - Zongshun Zhou
- China Experimental Centre of Subtropical Forestry, Chinese Academy of Forestry, Xinyu, Jiangxi, China
| | - Xiaoya Hou
- College of Forestry, Henan Agricultural University, Zhengzhou, Henan, China
| | - Jingle Zhu
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, Henan, China
- Key Laboratory of Non-timber Forest Germplasm Enhancement and Utilization of National Forestry and Grassland Administration, Zhengzhou, Henan, China
| |
Collapse
|
4
|
Zhang S, Yu X, Chen M, Chang C, Zhu J, Zhao H. Comparative Transcriptome and Metabolome Profiling Reveal Mechanisms of Red Leaf Color Fading in Populus × euramericana cv. 'Zhonghuahongye'. PLANTS (BASEL, SWITZERLAND) 2023; 12:3511. [PMID: 37836251 PMCID: PMC10575148 DOI: 10.3390/plants12193511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/03/2023] [Accepted: 10/05/2023] [Indexed: 10/15/2023]
Abstract
Anthocyanins are among the flavonoids that serve as the principal pigments affecting the color of plants. During leaf growth, the leaf color of 'Zhonghuahongye' gradually changes from copper-brown to yellow-green. At present, the mechanism of color change at different stages has not yet been discovered. To find this, we compared the color phenotype, metabolome, and transcriptome of the three leaf stages. The results showed that the anthocyanin content of leaves decreased by 62.5% and the chlorophyll content increased by 204.35%, 69.23%, 155.56% and 60%, respectively. Differential metabolites and genes were enriched in the pathway related to the synthesis of 'Zhonghuahongye' flavonoids and anthocyanins and to the biosynthesis of secondary metabolites. Furthermore, 273 flavonoid metabolites were detected, with a total of eight classes. DFR, FLS and ANS downstream of anthocyanin synthesis may be the key structural genes in reducing anthocyanin synthesis and accumulation in the green leaf of 'Zhonghuahongye'. The results of multi-omics analysis showed that the formation of color was primarily affected by anthocyanin regulation and its related synthesis-affected genes. This study preliminarily analyzed the green regression gene and metabolic changes in 'Zhonghuahongye' red leaves and constitutes a reference for the molecular breeding of 'Zhonghuahongye' red leaves.
Collapse
Affiliation(s)
- Shaowei Zhang
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, 3 Weiwu Road, Zhengzhou 450003, China;
- College of Rural Revitalization, The Open University of Henan, 36 Longzi Lake North Road, Zhengzhou 450046, China
| | - Xinran Yu
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, 3 Weiwu Road, Zhengzhou 450003, China;
| | - Mengjiao Chen
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, 682 Guangshan 1st Road, Guangzhou 510520, China;
| | - Cuifang Chang
- The College of Landscape Architecture and the Arts, Henan Agricultural University, 63 Agricultural Road, Zhengzhou 450002, China;
| | - Jingle Zhu
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, 3 Weiwu Road, Zhengzhou 450003, China;
| | - Han Zhao
- Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, 3 Weiwu Road, Zhengzhou 450003, China;
| |
Collapse
|