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Palma-Silva C, Mortati AF, Chaves CJN, Simões Santos Leal B, Ribeiro RV, Pinheiro F, Ferro M, Riaño-Pachón DM, de Mattos JS, Tavares MM, Aecyo P, da Costa Cacossi T, Schöngart J, Piedade MTF, André T. Ecological transcriptomics reveals stress response pathways of a ground-herb species in a waterlogging gradient of Amazonian riparian forests. Mol Ecol 2024:e17437. [PMID: 38887167 DOI: 10.1111/mec.17437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 04/23/2024] [Accepted: 05/31/2024] [Indexed: 06/20/2024]
Abstract
Environmental stress is a fundamental facet of life and a significant driver of natural selection in the wild. Gene expression diversity may facilitate adaptation to environmental changes, without necessary genetic change, but its role in adaptive divergence remains largely understudied in Neotropical systems. In Amazonian riparian forests, species distribution is predominantly influenced by species' waterlogging tolerance. The flooding gradient delineates distinct wetland forest types, shaping habitats and species characteristics. Here we investigated the molecular basis of environmental stress response in a tropical ground-herb species (Ischnosiphon puberulus) to environmental variation in Amazonian riparian forests. We compared environmental variables and gene expression profiles from individuals collected in two forest types: Igapó and Terra firme in the Amazonian riparian forests. Predictable seasonal flooding poses a significant challenge in Igapó compared to Terra firme environments, with the former presenting higher water column height and longer flooding duration. Our findings suggest that contrasting environmental conditions related to flooding regimes are important drivers of population genetic differentiation and differential gene expression in I. puberulus. Enriched gene ontology terms highlight associations with environmental stresses, such as defence response, water transport, phosphorylation, root development, response to auxin, salicylic acid and oxidative stress. By uncovering key environmental stress response pathways conserved across populations, I. puberulus offers novel genetic insights into the molecular basis of plant reactions to environmental constraints found in flooded areas of this highly biodiverse neotropical ecosystem.
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Affiliation(s)
- Clarisse Palma-Silva
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Amanda F Mortati
- Institute of Biodiversity and Forests, Universidade Federal do Oeste do Pará, Santarém, Pará, Brazil
| | - Cleber Juliano Neves Chaves
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Bárbara Simões Santos Leal
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
- Vale Institute of Technology Sustainable Development, Belém, Pará, Brazil
| | - Rafael V Ribeiro
- Laboratory of Crop Physiology-Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Fabio Pinheiro
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Milene Ferro
- São Paulo State University (UNESP), Institute of Biosciences, Rio Claro, São Paulo, Brazil
| | - Diego M Riaño-Pachón
- Laboratory of Computational, Evolutionary, and Systems Biology, Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Jacqueline Salvi de Mattos
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Marília Manupella Tavares
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Paulo Aecyo
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Tami da Costa Cacossi
- Laboratory of Evolutionary Ecology and Genomics of Neotropical Plants, Department of Plant Biology, Institute of Biology, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Jochen Schöngart
- Ecology, Monitoring and Sustainable Use of Wetlands (MAUA Research Group), National Institute for Amazon Research (INPA), Manaus, Amazonas, Brazil
| | - Maria Teresa Fernandez Piedade
- Ecology, Monitoring and Sustainable Use of Wetlands (MAUA Research Group), National Institute for Amazon Research (INPA), Manaus, Amazonas, Brazil
| | - Thiago André
- Institute of Biodiversity and Forests, Universidade Federal do Oeste do Pará, Santarém, Pará, Brazil
- Botany Department, Institute of Biological Sciences; Universidade de Brasília, Brasília, Distrito Federal, Brazil
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Wu Z, Liu K, Zhang X, Tang Q, Zeng L. CsNYC1a Mediates Chlorophyll Degradation and Albino Trait Formation in the Arbor-Type Tea Plant Camellia nanchuanica. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38848450 DOI: 10.1021/acs.jafc.4c02956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Albino germplasms are prized tea plant mutants with yellow/white leaves. However, understanding of the albino mechanisms in non-Camellia sinensis tea species remains limited. This study elucidated the albino trait formation in Nanchuan Dachashu (C. nanchuanica), an arbor-type tea species, and its association with tea quality. The yellow-leaved albino individual NH1 exhibited abnormal chloroplast ultrastructure and reduced chlorophyll/carotenoid levels compared to green-leaved NL1. Integrating transcriptomics, metabolomics, yeast one-hybrid, and transgenic approaches identified the chlorophyll b reductase gene CsNYC1a as a key regulator, which was significantly up-regulated in NH1, and its overexpression in Arabidopsis recapitulated the albino phenotype. In yeast, histone CsH1.2 binds to the CsNYC1a promoter. These findings suggest that CsH1.2-CsNYC1a-mediated chlorophyll degradation may be a key mechanism underlying albino formation in Nanchuan Dachashu. In addition, as a germplasm with higher polyphenol-to-amino acid ratio than NL1, NH1 offers more possibilities for breeding and application.
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Affiliation(s)
- Zhijun Wu
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Keyi Liu
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Xin Zhang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Qianhui Tang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Liang Zeng
- College of Food Science, Southwest University, Chongqing 400715, China
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Wei C, Luo G, Jin Z, Li J, Li Y. Physiological and Structural Changes in Leaves of Platycrater arguta Seedlings Exposed to Increasing Light Intensities. PLANTS (BASEL, SWITZERLAND) 2024; 13:1263. [PMID: 38732478 PMCID: PMC11085374 DOI: 10.3390/plants13091263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/22/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024]
Abstract
Understanding the light adaptation of plants is critical for conservation. Platycrater arguta, an endangered deciduous shrub endemic to East Asia, possesses high ornamental and phylogeographic value. However, the weak environmental adaptability of P. arguta species has limited its general growth and conservation. To obtain a deeper understanding of the P. arguta growth conditions, we examined the leaf morphology and physiology via anatomical and chloroplast ultrastructural analyses following exposure to different natural light intensities (full light, 40%, and 10%). The findings indicated that P. arguta seedings in the 10% light intensity had significantly improved leaf morphological characteristics and specific leaf area compared to those exposed to other intensities. The net photosynthetic rate, chlorophyll (Chl) content, photosynthetic nitrogen use efficiency (PNUE), and photosynthetic phosphorus use efficiency (PPUE) exhibited marked increases at a 10% light intensity compared to both 40% light and full light intensities, whereas the light compensation point and dark respiration levels reached their lowest values under the 10% light condition. With reduced light, leaf thickness, palisade tissue, spongy tissue, and stomatal density significantly decreased, whereas the stomatal length, stomatal width, and stomatal aperture were significantly elevated. When exposed to 10% light intensity, the ultrastructure of chloroplasts was well developed, chloroplasts and starch grain size, the number of grana, and thylakoids all increased significantly, while the number of plastoglobules was significantly reduced. Relative distance phenotypic plasticity index analysis exhibited that P. arguta adapts to varying light environments predominantly by adjusting PPUE, Chl b, PNUE, chloroplast area, and the activity of PSII reaction centers. We proposed that P. arguta efficiently utilizes low light to reconfigure its energy metabolism by regulating its leaf structure, photosynthetic capacity, nutrient use efficiency, and chloroplast development.
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Affiliation(s)
- Chunyan Wei
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou 318000, China; (C.W.); (G.L.); (Z.J.); (J.L.)
- Institute of Ecology, School of Life Sciences, Taizhou University, Taizhou 318000, China
| | - Guangyu Luo
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou 318000, China; (C.W.); (G.L.); (Z.J.); (J.L.)
- Institute of Ecology, School of Life Sciences, Taizhou University, Taizhou 318000, China
| | - Zexin Jin
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou 318000, China; (C.W.); (G.L.); (Z.J.); (J.L.)
- Institute of Ecology, School of Life Sciences, Taizhou University, Taizhou 318000, China
| | - Junmin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou 318000, China; (C.W.); (G.L.); (Z.J.); (J.L.)
- Institute of Ecology, School of Life Sciences, Taizhou University, Taizhou 318000, China
| | - Yueling Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou 318000, China; (C.W.); (G.L.); (Z.J.); (J.L.)
- Institute of Ecology, School of Life Sciences, Taizhou University, Taizhou 318000, China
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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.
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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.)
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5
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Kong D, Ye Z, Dai M, Ma B, Tan X. Light Intensity Modulates the Functional Composition of Leaf Metabolite Groups and Phyllosphere Prokaryotic Community in Garden Lettuce ( Lactuca sativa L.) Plants at the Vegetative Stage. Int J Mol Sci 2024; 25:1451. [PMID: 38338730 PMCID: PMC10855689 DOI: 10.3390/ijms25031451] [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: 11/15/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 02/12/2024] Open
Abstract
Light intensity primarily drives plant growth and morphogenesis, whereas the ecological impact of light intensity on the phyllosphere (leaf surface and endosphere) microbiome is poorly understood. In this study, garden lettuce (Lactuca sativa L.) plants were grown under low, medium, and high light intensities. High light intensity remarkably induced the leaf contents of soluble proteins and chlorophylls, whereas it reduced the contents of leaf nitrate. In comparison, medium light intensity exhibited the highest contents of soluble sugar, cellulose, and free amino acids. Meanwhile, light intensity resulted in significant changes in the composition of functional genes but not in the taxonomic compositions of the prokaryotic community (bacteria and archaea) in the phyllosphere. Notably, garden lettuce plants under high light intensity treatment harbored more sulfur-cycling mdh and carbon-cycling glyA genes than under low light intensity, both of which were among the 20 most abundant prokaryotic genes in the leaf phyllosphere. Furthermore, the correlations between prokaryotic functional genes and lettuce leaf metabolite groups were examined to disclose their interactions under varying light intensities. The relative abundance of the mdh gene was positively correlated with leaf total chlorophyll content but negatively correlated with leaf nitrate content. In comparison, the relative abundance of the glyA gene was positively correlated with leaf total chlorophyll and carotenoids. Overall, this study revealed that the functional composition of the phyllosphere prokaryotic community and leaf metabolite groups were tightly linked in response to changing light intensities. These findings provided novel insights into the interactions between plants and prokaryotic microbes in indoor farming systems, which will help optimize environmental management in indoor farms and harness beneficial plant-microbe relationships for crop production.
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Affiliation(s)
- Dedong Kong
- Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (D.K.); (Z.Y.); (M.D.)
| | - Ziran Ye
- Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (D.K.); (Z.Y.); (M.D.)
| | - Mengdi Dai
- Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (D.K.); (Z.Y.); (M.D.)
| | - Bin Ma
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China;
| | - Xiangfeng Tan
- Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; (D.K.); (Z.Y.); (M.D.)
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Karumannil S, Khan TA, Kappachery S, Gururani MA. Impact of Exogenous Melatonin Application on Photosynthetic Machinery under Abiotic Stress Conditions. PLANTS (BASEL, SWITZERLAND) 2023; 12:2948. [PMID: 37631160 PMCID: PMC10458501 DOI: 10.3390/plants12162948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/07/2023] [Accepted: 08/13/2023] [Indexed: 08/27/2023]
Abstract
Inhospitable conditions that hinder plant growth and development encompass a range of abiotic stresses, such as drought, extreme temperatures (both low and high), salinity, exposure to heavy metals, and irradiation. The cumulative impact of these stresses leads to a considerable reduction in agricultural productivity worldwide. The generation of reactive oxygen species (ROS) is a shared mechanism of toxicity induced by all these abiotic stimuli in plants, resulting in oxidative damage and membrane instability. Extensive research has shed light on the dual role of melatonin in plants, where it serves as both a growth regulator, fostering growth and development, and a potent protector against abiotic stresses. The inherent potential of melatonin to function as a natural antioxidant positions it as a promising biostimulant for agricultural use, bolstering plants' abilities to withstand a wide array of environmental challenges. Beyond its antioxidant properties, melatonin has demonstrated its capacity to regulate the expression of genes associated with the photosynthetic process. This additional characteristic enhances its appeal as a versatile chemical agent that can be exogenously applied to plants, particularly in adverse conditions, to improve their resilience and optimize photosynthetic efficiency in every phase of the plant life cycle. An examination of the molecular mechanisms underlying the stress-protective effects of exogenous melatonin on the photosynthetic machinery of plants under various abiotic stresses is presented in this paper. In addition, future prospects are discussed for developing stress-tolerant crops for sustainable agriculture in challenging environments.
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Affiliation(s)
| | | | | | - Mayank Anand Gururani
- Biology Department, College of Science, UAE University, Al Ain P.O. Box 15551, United Arab Emirates
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Zhang X, Liu K, Tang Q, Zeng L, Wu Z. Light Intensity Regulates Low-Temperature Adaptability of Tea Plant through ROS Stress and Developmental Programs. Int J Mol Sci 2023; 24:9852. [PMID: 37373002 DOI: 10.3390/ijms24129852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023] Open
Abstract
Low-temperature stress limits global tea planting areas and production efficiency. Light is another essential ecological factor that acts in conjunction with temperature in the plant life cycle. However, it is unclear whether the differential light environment affects the low temperature adaptability of tea plant (Camellia sect. Thea). In this study, tea plant materials in three groups of light intensity treatments showed differentiated characteristics for low-temperature adaptability. Strong light (ST, 240 μmol·m-2·s-1) caused the degradation of chlorophyll and a decrease in peroxidase (POD), superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and polyphenol oxidase (PPO) activities, as well as an increase in soluble sugar, soluble protein, malondialdehyde (MDA), and relative conductivity in tea leaves. In contrast, antioxidant enzyme activities, chlorophyll content, and relative conductivity were highest in weak light (WT, 15 μmol·m-2·s-1). Damage was observed in both ST and WT materials relative to moderate light intensity (MT, 160 μmol·m-2·s-1) in a frost resistance test. Chlorophyll degradation in strong light was a behavior that prevented photodamage, and the maximum photosynthetic quantum yield of PS II (Fv/Fm) decreased with increasing light intensity. This suggests that the browning that occurs on the leaf surface of ST materials through frost may have been stressed by the previous increase in reactive oxygen species (ROS). Frost intolerance of WT materials is mainly related to delayed tissue development and tenderness holding. Interestingly, transcriptome sequencing revealed that stronger light favors starch biosynthesis, while cellulose biosynthesis is enhanced in weaker light. It showed that light intensity mediated the form of carbon fixation in tea plant, and this was associated with low-temperature adaptability.
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Affiliation(s)
- Xin Zhang
- College of Food Science, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China
- Integrative Science Center of Germplasm Creation, Southwest University, Chongqing 401329, China
- Tea Research Institute, Southwest University, Chongqing 400715, China
| | - Keyi Liu
- College of Food Science, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China
- Integrative Science Center of Germplasm Creation, Southwest University, Chongqing 401329, China
- Tea Research Institute, Southwest University, Chongqing 400715, China
| | - Qianhui Tang
- College of Food Science, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China
- Integrative Science Center of Germplasm Creation, Southwest University, Chongqing 401329, China
- Tea Research Institute, Southwest University, Chongqing 400715, China
| | - Liang Zeng
- College of Food Science, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China
- Integrative Science Center of Germplasm Creation, Southwest University, Chongqing 401329, China
- Tea Research Institute, Southwest University, Chongqing 400715, China
| | - Zhijun Wu
- College of Food Science, Southwest University, Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China
- Integrative Science Center of Germplasm Creation, Southwest University, Chongqing 401329, China
- Tea Research Institute, Southwest University, Chongqing 400715, China
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8
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Yao T, Ding C, Che Y, Zhang Z, Cui C, Ji G, Song J, Zhang H, Ao H, Zhang H. Heterologous expression of Zygophyllum xanthoxylon zinc finger protein gene (ZxZF) enhances the tolerance of poplar photosynthetic function to drought stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 199:107748. [PMID: 37178571 DOI: 10.1016/j.plaphy.2023.107748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/19/2023] [Accepted: 05/08/2023] [Indexed: 05/15/2023]
Abstract
The ZxZF transcription factor (TF) of Zygophyllum xanthoxylon (Bunge) Maxim, an extremely drought-resistant woody plant, is a C2H2 zinc finger protein. Studies have shown that C2H2 zinc finger proteins play important roles in activating stress-related genes and enhancing plant resistance. However, their function in regulating plant photosynthesis under drought stress is not well understood. Since poplar is an important greening and afforestation tree species, it is particularly important to cultivate excellent drought-tolerant varieties. The ZxZF transcription factor (TF) was heterogeneously expressed in Euroamerican poplar (Populus × euroameracana cl.'Bofengl') by genetic transformation. Based on the mechanism and potential function of poplar photosynthesis regulated by ZxZF under drought stress, transcriptomic and physiological determinations were used to reveal the important role of this gene in improving the drought resistance of poplar. The results showed that the overexpression of ZxZF TF in transgenic poplars could improve the inhibition of Calvin cycle by regulating stomatal opening and increasing the concentration of intercellular CO2. The chlorophyll content, photosynthetic performance index, and photochemical efficiency of transgenic lines under drought stress were significantly higher than those of the wild type (WT). The overexpression of ZxZF TFs could alleviate the degree of photoinhibition of photosystems II and I under drought stress and maintain the efficiency of light energy capture and the photosynthetic electron transport chain. The transcriptomic data also showed that differentially expressed genes between the transgenic poplar and WT under drought stress were primarily enriched in metabolic pathways related to photosynthesis, such as photosynthesis, photosynthesis-antenna protein, porphyrin and chlorophyll metabolism, and photosynthetic carbon fixation, and the downregulation of genes related to chlorophyll synthesis, photosynthetic electron transport and Calvin cycle were alleviated. In addition, the overexpression of ZxZF TF can alleviate the inhibition of NADH dehydrogenase-like (NDH) cyclic electron flow of the poplar NDH pathway under drought stress, which plays an important role in reducing the excess pressure of electrons on the photosynthetic electron transport chain and maintaining the normal photosynthetic electron transport. In summary, the overexpression of ZxZF TFs can effectively alleviate the inhibition of drought on the assimilation of carbon in poplar and have a positive impact on light energy capture, the orderly transport of photosynthetic electron transport chain and the integrity of the photosystem, which is highly significant to acheivean in-depth understanding of the function of ZxZF TFs. This also provides an important basis for the breeding of new transgenic poplar varieties.
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Affiliation(s)
- Tongtong Yao
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Changjun Ding
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China.
| | - Yanhui Che
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Zhe Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Congcong Cui
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Guangxin Ji
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Jiaqi Song
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Hongbo Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China
| | - Hong Ao
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China.
| | - Huihui Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, China.
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9
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Han H, Zhou Y, Liu H, Chen X, Wang Q, Zhuang H, Sun X, Ling Q, Zhang H, Wang B, Wang J, Tang Y, Wang H, Liu H. Transcriptomics and Metabolomics Analysis Provides Insight into Leaf Color and Photosynthesis Variation of the Yellow-Green Leaf Mutant of Hami Melon ( Cucumis melo L.). PLANTS (BASEL, SWITZERLAND) 2023; 12:1623. [PMID: 37111847 PMCID: PMC10143263 DOI: 10.3390/plants12081623] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 06/16/2023]
Abstract
Leaf color mutants are ideal materials for studying the regulatory mechanism of chloroplast development and photosynthesis. We isolated a cucumis melo spontaneous mutant (MT), which showed yellow-green leaf phenotype in the whole growing period and could be inherited stably. We compared its leaves with the wild type (WT) in terms of cytology, physiology, transcriptome and metabolism. The results showed that the thylakoid grana lamellae of MT were loosely arranged and fewer in number than WT. Physiological experiments also showed that MT had less chlorophyll content and more accumulation of reactive oxygen species (ROS) than WT. Furthermore, the activity of several key enzymes in C4 photosynthetic carbon assimilation pathway was more enhanced in MT than WT. Transcriptomic and metabolomic analyses showed that differential expression genes and differentially accumulated metabolites in MT were mainly co-enriched in the pathways related to photosystem-antenna proteins, central carbon metabolism, glutathione metabolism, phenylpropanoid biosynthesis and flavonoid metabolism. We also analyzed several key proteins in photosynthesis and chloroplast transport by Western blot. In summary, the results may provide a new insight into the understanding of how plants respond to the impaired photosynthesis by regulating chloroplast development and photosynthetic carbon assimilation pathways.
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Affiliation(s)
- Hongwei Han
- Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps, Department of Horticulture, College of Agriculture, Shihezi University, Shihezi 832003, China; (H.H.)
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Yuan Zhou
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200030, China
| | - Huifang Liu
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Xianjun Chen
- Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps, Department of Horticulture, College of Agriculture, Shihezi University, Shihezi 832003, China; (H.H.)
| | - Qiang Wang
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Hongmei Zhuang
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Xiaoxia Sun
- Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps, Department of Horticulture, College of Agriculture, Shihezi University, Shihezi 832003, China; (H.H.)
| | - Qihua Ling
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200030, China
| | - Huijun Zhang
- School of Life Science, Huaibei Normal University, Huaibei 235000, China
| | - Baike Wang
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Juan Wang
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Yaping Tang
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Hao Wang
- Key Laboratory of Horticulture Crop Genomics and Genetic Improvement in Xinjiang, Institute of Horticultural Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
| | - Huiying Liu
- Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps, Department of Horticulture, College of Agriculture, Shihezi University, Shihezi 832003, China; (H.H.)
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10
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Tsai WA, Sung PH, Kuo YW, Chen MC, Jeng ST, Lin JS. Involvement of microRNA164 in responses to heat stress in Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 329:111598. [PMID: 36657663 DOI: 10.1016/j.plantsci.2023.111598] [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: 08/23/2022] [Revised: 12/28/2022] [Accepted: 01/14/2023] [Indexed: 06/17/2023]
Abstract
MicroRNAs (miRNAs) are considered to be integral parts of plant stress regulatory networks. Under long-term heat stress, miR164 is induced. Conversely, its targets are repressed. Transgenic overexpressors (164OE) and mutants of MIR164 (mir164) were used to study miR164's functions during heat responses. Target gene expression decreased in 164OE transgenic plants and increased in mir164a-4 and mir164b mutants. Under heat stress, the mir164 mutants presented heat-sensitive phenotypes, while 164OE transgenic plants showed better thermotolerance than wild-type (WT) plants. Overexpression of miR164 decreased heat-inhibition of hypocotyl lengths. Under heat stress, miR164 target genes modulated the expression of chlorophyll b reductase and chlorophyll catabolic genes, reducing the chlorophyll a/b ratio. More H2O2 accumulated in the mir164 mutants under heat stress, which may have caused oxidative damage. In addition, expression of HSPs was altered in the experimental plants compared to that of the WT. Overall, miR164 influenced target gene expression, altering development, chlorophyll a/b ratio, H2O2-caused damage, and HSPs expression under long-term heat stress. These phenomena, in turn, likely influence the thermotolerance of plants.
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Affiliation(s)
- Wei-An Tsai
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St. Lucia, QLD, Australia.
| | - Po-Han Sung
- Department of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan.
| | - Yun-Wei Kuo
- Department of Agronomy, National Chung Hsing University, Taichung 40227, Taiwan; Institute of Flowers, Sanming Academy of Agricultural Sciences, Sanming 365000, Fujian, China.
| | - Ming-Cheng Chen
- Department of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan.
| | - Shih-Tong Jeng
- Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei 10617, Taiwan.
| | - Jeng-Shane Lin
- Department of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan.
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11
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Cun Z, Xu XZ, Zhang JY, Shuang SP, Wu HM, An TX, Chen JW. Responses of photosystem to long-term light stress in a typically shade-tolerant species Panax notoginseng. FRONTIERS IN PLANT SCIENCE 2023; 13:1095726. [PMID: 36714733 PMCID: PMC9878349 DOI: 10.3389/fpls.2022.1095726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 12/27/2022] [Indexed: 06/18/2023]
Abstract
Photosynthetic adaptive strategies vary with the growth irradiance. The potential photosynthetic adaptive strategies of shade-tolerant species Panax notoginseng (Burkill) F. H. Chen to long-term high light and low light remains unclear. Photosynthetic performance, photosynthesis-related pigments, leaves anatomical characteristics and antioxidant enzyme activities were comparatively determined in P. notoginseng grown under different light regimes. The thickness of the upper epidermis, palisade tissue, and lower epidermis were declined with increasing growth irradiance. Low-light-grown leaves were declined in transpiration rate (Tr) and stomatal conductance (Cond), but intercellular CO2 concentration (C i) and net photosynthesis rate (P n) had opposite trends. The maximum photo-oxidation P 700 + (P m) was greatly reduced in 29.8% full sunlight (FL) plants; The maximum quantum yield of photosystem II (F v/F m) in 0.2% FL plants was significantly lowest. Electron transport, thermal dissipation, and the effective quantum yield of PSI [Y(I)] and PSII [Y(II)] were declined in low-light-grown plants compared with high-light-grown P. notoginseng. The minimum value of non-regulated energy dissipation of PSII [Y(NO)] was recorded in 0.2% FL P. notoginseng. OJIP kinetic curve showed that relative variable fluorescence at J-phase (V J) and the ratio of variable fluorescent F K occupying the F J-F O amplitude (W k) were significantly increased in 0.2% FL plants. However, the increase in W k was lower than the increase in V J. In conclusion, PSI photoinhibition is the underlying sensitivity of the typically shade-tolerant species P. notoginseng to high light, and the photodamage to PSII acceptor side might cause the typically shade-tolerant plants to be unsuitable for long-term low light stress.
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Affiliation(s)
- Zhu Cun
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, China
- National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, China
| | - Xiang-Zeng Xu
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, China
- National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, China
- Research Center for Collection and Utilization of Tropical Crop Resources, Yunnan Institute of Tropical Crops, Xishuangbanna, China
| | - Jin-Yan Zhang
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, China
- National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, China
| | - Sheng-Pu Shuang
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, China
- National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, China
| | - Hong-Min Wu
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, China
- National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, China
| | - Tong-Xin An
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
| | - Jun-Wen Chen
- College of Agronomy & Biotechnology, Yunnan Agricultural University, Kunming, China
- Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, China
- National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, China
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12
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Luo D, Liu J, Wu Y, Zhang X, Zhou Q, Fang L, Liu Z. NUCLEAR TRANSPORT FACTOR 2-LIKE improves drought tolerance by modulating leaf water loss in alfalfa (Medicago sativa L.). THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 112:429-450. [PMID: 36006043 DOI: 10.1111/tpj.15955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/14/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Drought is a major environmental factor that limits the production of alfalfa (Medicago sativa). In the present study, M. sativa NUCLEAR TRANSPORT FACTOR 2-LIKE (MsNTF2L) was identified as a nucleus-, cytoplasm-, and plasma membrane-localized protein. Its transcriptional expression was highly induced by ABA and drought stress. Overexpression of MsNTF2L in Arabidopsis resulted in hypersensitivity to ABA during both the seed germination and seedling growth stages. However, transgenic Arabidopsis plants exhibited enhanced tolerance to drought stress by reducing the levels of reactive oxygen species (ROS) and increasing the expression of stress/ABA-inducible genes. Consistently, analysis of MsNTF2L overexpression (OE) and RNA interference (RNAi) alfalfa plants revealed that MsNTF2L confers drought tolerance through promoting ROS scavenging, a decrease in stomatal density, ABA-induced stomatal closure, and epicuticular wax crystal accumulation. MsNTF2L highly affected epicuticular wax deposition, as a large group of wax biosynthesis and transport genes were influenced in the alfalfa OE and RNAi lines. Furthermore, transcript profiling of drought-treated alfalfa WT, OE, and RNAi plants showed a differential drought response for genes related to stress/ABA signaling, antioxidant defense, and photosynthesis. Taken together, these results reveal that MsNTF2L confers drought tolerance in alfalfa via modulation of leaf water loss (by regulating both stomata and wax deposition), antioxidant defense, and photosynthesis.
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Affiliation(s)
- Dong Luo
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
- Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Jie Liu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Yuguo Wu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Xi Zhang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Qiang Zhou
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Longfa Fang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Zhipeng Liu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
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13
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Belghith I, Senkler J, Abdelly C, Braun HP, Debez A. Changes in leaf ecophysiological traits and proteome profile provide new insights into variability of salt response in the succulent halophyte Cakile maritima. FUNCTIONAL PLANT BIOLOGY : FPB 2022; 49:613-624. [PMID: 35190022 DOI: 10.1071/fp21151] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 02/01/2022] [Indexed: 05/20/2023]
Abstract
Natural variability of stress tolerance in halophytic plants is of significance both ecologically and in view of identifying molecular traits for salt tolerance in plants. Using ecophysiological and proteomic analyses, we address these phenomena in two Tunisian accessions of the oilseed halophyte, Cakile maritima Scop., thriving on arid and semi-arid Mediterranean bioclimatic stages (Djerba and Raoued, respectively), with a special emphasis on the leaves. Changes in biomass, photosynthetic gas exchange and pigment concentrations in C. maritima plants treated with three salinity levels (0, 100 and 300mM NaCl) were monitored for 1month. Comparative two-dimensional gel electrophoresis (2-DE) revealed 94 and 56 proteins of differential abundance in Raoued and Djerba accessions, respectively. These salinity-responsive proteins were mainly related to photosynthesis and oxidative phosphorylation (OXPHOS). Although Djerba accession showed a lower biomass productivity, it showed a slightly higher CO2 assimilation rate than Raoued accession when salt-treated. Photosynthesis impairment in both accessions under salinity was also suggested by the lower abundance of proteins involved in Calvin cycle and electron transfer. A significant increase of protein spots involved in the OXPHOS system was found in Djerba accession, suggesting an increase in mitochondrial respiration for increased ATP production under saline conditions, whereas a lesser pronounced trend was observed for Raoued accession. The latter showed in addition higher abundance of proteins involved in photorespiration. Salt-challenged plants of Djerba also likely developed mechanisms for scavenging ROS in leaves as shown by the increase in superoxide dismutase and thioredoxin, while an opposite trend was found in Raoued.
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Affiliation(s)
- Ikram Belghith
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cedria (CBBC), BP 901, 2050 Hammam-Lif, Tunisia; and Department of Plant Proteomics, Institute of Plant Genetics, Leibniz University of Hannover, Herrenhäuser Street 2, 30419 Hannover, Germany; and Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Jennifer Senkler
- Department of Plant Proteomics, Institute of Plant Genetics, Leibniz University of Hannover, Herrenhäuser Street 2, 30419 Hannover, Germany
| | - Chedly Abdelly
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cedria (CBBC), BP 901, 2050 Hammam-Lif, Tunisia
| | - Hans-Peter Braun
- Department of Plant Proteomics, Institute of Plant Genetics, Leibniz University of Hannover, Herrenhäuser Street 2, 30419 Hannover, Germany
| | - Ahmed Debez
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cedria (CBBC), BP 901, 2050 Hammam-Lif, Tunisia; and Department of Plant Proteomics, Institute of Plant Genetics, Leibniz University of Hannover, Herrenhäuser Street 2, 30419 Hannover, Germany
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14
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Modulations in Chlorophyll a Fluorescence Based on Intensity and Spectral Variations of Light. Int J Mol Sci 2022; 23:ijms23105599. [PMID: 35628428 PMCID: PMC9146714 DOI: 10.3390/ijms23105599] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 01/03/2023] Open
Abstract
Photosynthetic efficiency is significantly affected by both qualitative and quantitative changes during light exposure. The properties of light have a profound effect on electron transport and energy absorption in photochemical reactions. In addition, fluctuations in light intensity and variations in the spectrum can lead to a decrease in photosystem II efficiency. These features necessitate the use of a simple and suitable tool called chlorophyll a fluorescence to study photosynthetic reactions as a function of the aforementioned variables. This research implies that chlorophyll a fluorescence data can be used to determine precise light conditions that help photoautotrophic organisms optimally function.
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15
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Liang J, Zhang S, Yu W, Wu X, Wang W, Peng F, Xiao Y. PpSnRK1α overexpression alters the response to light and affects photosynthesis and carbon metabolism in tomato. PHYSIOLOGIA PLANTARUM 2021; 173:1808-1823. [PMID: 34387863 DOI: 10.1111/ppl.13523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/21/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
Abstract
Sucrose nonfermentation 1 (SNF1) related kinase 1 (SnRK1) is a central energy sensor kinase in plants and a key switch regulating carbon and nitrogen metabolism. Fruit quality depends on leaf photosynthetic efficiency and carbohydrate accumulation, but the role of peach (Prunus persica) SnRK1 α subunit (PpSnRK1α) in regulating leaf carbon metabolism and the light signal response remains unclear. We studied the carbon metabolism of tomato leaves overexpressing PpSnRK1α and the responses of PpSnRK1α-overexpressing tomato leaves to light signals. Transcriptome, metabolome, and real-time quantitative polymerase chain reaction analyses revealed that uridine 5'-diphosphoglucose, glutamate, and glucose-6-phosphate accumulated in tomato leaves overexpressing PpSnRK1α. The expression of genes (e.g., GDH2, SuSy) encoding enzymes related to carbon metabolism (e.g., glutamate dehydrogenase (GDH2; EC: 1.4.1.3), sucrose synthase (SS; EC: 2.4.1.13)) and chlorophyllase (CLH) encoding chlorophyllase (EC: 3.1.1.14), which regulates photosynthetic pigments and photosynthesis, was significantly increased in PpSnRK1α-overexpressing plants. PpSnRK1α overexpression inhibited the growth of hypocotyls and primary roots in response to light. The chlorophyll content of the leaves was increased, the activity of SS and ADPG pyrophosphatase (AGPase; EC: 2.7.7.27) was increased, and photosynthesis was promoted in PpSnRK1α-overexpressing plants relative to wild-type plants. Under light stress, the net photosynthetic rate of plants was significantly higher in plants overexpressing PpSnRK1α than in wild-type plants. This indicates that PpSnRK1α promotes the accumulation of carbohydrates by regulating genes related to carbon metabolism, regulating genes related to chlorophyll synthesis, and then responding to light signals to increase the net photosynthetic rate of leaves.
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Affiliation(s)
- Jiahui Liang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
| | - Shuhui Zhang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
| | - Wenying Yu
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
| | - Xuelian Wu
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
| | - Wenru Wang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
| | - Futian Peng
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
| | - Yuansong Xiao
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, China
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16
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Caspy I, Neumann E, Fadeeva M, Liveanu V, Savitsky A, Frank A, Kalisman YL, Shkolnisky Y, Murik O, Treves H, Hartmann V, Nowaczyk MM, Schuhmann W, Rögner M, Willner I, Kaplan A, Schuster G, Nelson N, Lubitz W, Nechushtai R. Cryo-EM photosystem I structure reveals adaptation mechanisms to extreme high light in Chlorella ohadii. NATURE PLANTS 2021; 7:1314-1322. [PMID: 34462576 DOI: 10.1038/s41477-021-00983-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 07/07/2021] [Indexed: 05/10/2023]
Abstract
Photosynthesis in deserts is challenging since it requires fast adaptation to rapid night-to-day changes, that is, from dawn's low light (LL) to extreme high light (HL) intensities during the daytime. To understand these adaptation mechanisms, we purified photosystem I (PSI) from Chlorella ohadii, a green alga that was isolated from a desert soil crust, and identified the essential functional and structural changes that enable the photosystem to perform photosynthesis under extreme high light conditions. The cryo-electron microscopy structures of PSI from cells grown under low light (PSILL) and high light (PSIHL), obtained at 2.70 and 2.71 Å, respectively, show that part of light-harvesting antenna complex I (LHCI) and the core complex subunit (PsaO) are eliminated from PSIHL to minimize the photodamage. An additional change is in the pigment composition and their number in LHCIHL; about 50% of chlorophyll b is replaced by chlorophyll a. This leads to higher electron transfer rates in PSIHL and might enable C. ohadii PSI to act as a natural photosynthesiser in photobiocatalytic systems. PSIHL or PSILL were attached to an electrode and their induced photocurrent was determined. To obtain photocurrents comparable with PSIHL, 25 times the amount of PSILL was required, demonstrating the high efficiency of PSIHL. Hence, we suggest that C. ohadii PSIHL is an ideal candidate for the design of desert artificial photobiocatalytic systems.
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Affiliation(s)
- Ido Caspy
- Department of Biochemistry, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Ehud Neumann
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Maria Fadeeva
- Department of Biochemistry, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Varda Liveanu
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Anton Savitsky
- Faculty of Physics, Technical University Dortmund, Dortmund, Germany
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany
| | - Anna Frank
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | - Yael Levi Kalisman
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel
- The Centre for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Yoel Shkolnisky
- School of Mathematical Sciences, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Omer Murik
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Haim Treves
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Volker Hartmann
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | - Marc M Nowaczyk
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry-Centre for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Bochum, Germany
| | - Matthias Rögner
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
| | - Itamar Willner
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Aaron Kaplan
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Gadi Schuster
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Nathan Nelson
- Department of Biochemistry, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel.
| | - Wolfgang Lubitz
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany.
| | - Rachel Nechushtai
- Institute of Life Science, Faculty of Science and Mathematics, The Hebrew University of Jerusalem, Jerusalem, Israel.
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17
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Mora-Poblete F, Ballesta P, Lobos GA, Molina-Montenegro M, Gleadow R, Ahmar S, Jiménez-Aspee F. Genome-wide association study of cyanogenic glycosides, proline, sugars, and pigments in Eucalyptus cladocalyx after 18 consecutive dry summers. PHYSIOLOGIA PLANTARUM 2021; 172:1550-1569. [PMID: 33511661 DOI: 10.1111/ppl.13349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 01/07/2021] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Natural variation of cyanogenic glycosides, soluble sugars, proline, and nondestructive optical sensing of pigments (chlorophyll, flavonols, and anthocyanins) was examined in ex situ natural populations of Eucalyptus cladocalyx F. Muell. grown under dry environmental conditions in the southern Atacama Desert, Chile. After 18 consecutive dry seasons, considerable plant-to-plant phenotypic variation for all the traits was observed in the field. For example, leaf hydrogen cyanide (HCN) concentrations varied from 0 (two acyanogenic individuals) to 1.54 mg cyanide g-1 DW. Subsequent genome-wide association study revealed associations with several genes with a known function in plants. HCN content was associated robustly with genes encoding Cytochrome P450 proteins, and with genes involved in the detoxification mechanism of HCN in cells (β-cyanoalanine synthase and cyanoalanine nitrilase). Another important finding was that sugars, proline, and pigment content were linked to genes involved in transport, biosynthesis, and/or catabolism. Estimates of genomic heritability (based on haplotypes) ranged between 0.46 and 0.84 (HCN and proline content, respectively). Proline and soluble sugars had the highest predictive ability of genomic prediction models (PA = 0.65 and PA = 0.71, respectively). PA values for HCN content and flavonols were relatively moderate, with estimates ranging from 0.44 to 0.50. These findings provide new understanding on the genetic architecture of cyanogenic capacity, and other key complex traits in cyanogenic E. cladocalyx.
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Affiliation(s)
| | - Paulina Ballesta
- Institute of Biological Sciences, Universidad de Talca, Talca, Chile
| | - Gustavo A Lobos
- Plant Breeding and Phenomic Center, Faculty of Agricultural Sciences, Universidad de Talca, Talca, Chile
| | - Marco Molina-Montenegro
- Institute of Biological Sciences, Universidad de Talca, Talca, Chile
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile
| | - Roslyn Gleadow
- School of Biological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Sunny Ahmar
- Institute of Biological Sciences, Universidad de Talca, Talca, Chile
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Felipe Jiménez-Aspee
- Department of Food Biofunctionality, Institute of Nutritional Sciences, University of Hohenheim, Stuttgart, Germany
- Departamento de Ciencias Básicas Biomédicas, Facultad de Ciencias de la Salud, Universidad de Talca, Talca, Chile
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18
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Chen L, Tarin MWK, Huo H, Zheng Y, Chen J. Photosynthetic Responses of Anthurium × 'Red' under Different Light Conditions. PLANTS 2021; 10:plants10050857. [PMID: 33922653 PMCID: PMC8145403 DOI: 10.3390/plants10050857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/09/2021] [Accepted: 04/18/2021] [Indexed: 11/16/2022]
Abstract
Light is an essential energy source for plant photosynthesis, although it can also be a stress-causing element. Therefore, the current research was aimed to compare photosynthetic responses of Anthurium × 'Red' leaves at different positions (bottom old leaf, 1; center mature leaf, 2; top expanded leaf, 3) established under three photosynthetic photon flux densities (PPFDs): 550 μmol·m-2·s-1 as high (H), 350 μmol·m-2·s-1 as medium (M), and 255 μmol·m-2·s-1 as low (L). After six months, all the replicates were relocated to interior rooms with a PPFD of 30 μmol·m-2·s-1. There were no significant differences in chlorophyll concentration of the old leaf among treatments, before (Day 0) and after shifting the plants to interior rooms (Day 30). The total chlorophyll concentrations of the mature and top leaves increased significantly. In greenhouse conditions, H and M treatments did not show any significant change for net photosynthetic rate (Pn) at various leaf positions. However, M2 exhibited an improved Pn in the interior conditions. Plants grown under M treatment were greener and had bigger leaves compared to other treatments. Our study reveals that Anthurium × 'Red' photosynthesis responses to different light conditions varied distinctly. However, M treatment can keep the plants looking green by accumulating enough energy for indoor conditions, and middle and lower leaves may be triggered to restore photosynthetic activity under low light or indoor conditions.
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Affiliation(s)
- Lingyan Chen
- College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; (L.C.); (M.W.K.T.)
| | - Muhammad Waqqas Khan Tarin
- College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; (L.C.); (M.W.K.T.)
| | - Heqiang Huo
- Mid-Florida Research Education Center and Environmental Horticulture Department, Institute of Food and Agricultural Sciences, University of Florida, Apopka, FL 32703, USA;
| | - Yushan Zheng
- College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; (L.C.); (M.W.K.T.)
- Correspondence: (Y.Z.); (J.C.)
| | - Jianjun Chen
- Mid-Florida Research Education Center and Environmental Horticulture Department, Institute of Food and Agricultural Sciences, University of Florida, Apopka, FL 32703, USA;
- Correspondence: (Y.Z.); (J.C.)
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19
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Muhammad I, Shalmani A, Ali M, Yang QH, Ahmad H, Li FB. Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses. FRONTIERS IN PLANT SCIENCE 2021; 11:615942. [PMID: 33584756 PMCID: PMC7876081 DOI: 10.3389/fpls.2020.615942] [Citation(s) in RCA: 87] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 12/28/2020] [Indexed: 05/02/2023]
Abstract
Photosynthesis sustains plant life on earth and is indispensable for plant growth and development. Factors such as unfavorable environmental conditions, stress regulatory networks, and plant biochemical processes limits the photosynthetic efficiency of plants and thereby threaten food security worldwide. Although numerous physiological approaches have been used to assess the performance of key photosynthetic components and their stress responses, though, these approaches are not extensive enough and do not favor strategic improvement of photosynthesis under abiotic stresses. The decline in photosynthetic capacity of plants due to these stresses is directly associated with reduction in yield. Therefore, a detailed information of the plant responses and better understanding of the photosynthetic machinery could help in developing new crop plants with higher yield even under stressed environments. Interestingly, cracking of signaling and metabolic pathways, identification of some key regulatory elements, characterization of potential genes, and phytohormone responses to abiotic factors have advanced our knowledge related to photosynthesis. However, our understanding of dynamic modulation of photosynthesis under dramatically fluctuating natural environments remains limited. Here, we provide a detailed overview of the research conducted on photosynthesis to date, and highlight the abiotic stress factors (heat, salinity, drought, high light, and heavy metal) that limit the performance of the photosynthetic machinery. Further, we reviewed the role of transcription factor genes and various enzymes involved in the process of photosynthesis under abiotic stresses. Finally, we discussed the recent progress in the field of biodegradable compounds, such as chitosan and humic acid, and the effect of melatonin (bio-stimulant) on photosynthetic activity. Based on our gathered researched data set, the logical concept of photosynthetic regulation under abiotic stresses along with improvement strategies will expand and surely accelerate the development of stress tolerance mechanisms, wider adaptability, higher survival rate, and yield potential of plant species.
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Affiliation(s)
- Izhar Muhammad
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Abdullah Shalmani
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Muhammad Ali
- Department of Horticulture, Zhejiang University, Hangzhou, China
| | - Qing-Hua Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
| | - Husain Ahmad
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Feng Bai Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
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20
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Zhu MZ, Zhou F, Ran LS, Li YL, Tan B, Wang KB, Huang JA, Liu ZH. Metabolic Profiling and Gene Expression Analyses of Purple-Leaf Formation in Tea Cultivars ( Camellia sinensis var. sinensis and var. assamica). FRONTIERS IN PLANT SCIENCE 2021; 12:606962. [PMID: 33746994 PMCID: PMC7973281 DOI: 10.3389/fpls.2021.606962] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 01/08/2021] [Indexed: 05/09/2023]
Abstract
Purple-leaf tea cultivars are known for their specific chemical composition that greatly influences tea bioactivity and plant resistance. Some studies have tried to reveal the purple-leaf formation mechanism of tea by comparing the purple new leaves and green older leaves in the same purple-leaf tea cultivar. It has been reported that almost all structural genes involved in anthocyanin/flavonoid biosynthesis were down-regulated in purple-leaf tea cultivars when the purple new leaves become green older leaves. However, anthocyanin/flavonoid biosynthesis is also affected by the growth period of tea leaves, gradually decreasing as new tea leaves become old tea leaves. This leads to uncertainty as to whether the purple-leaf formation is attributed to the high expression of structural genes in anthocyanin/flavonoid biosynthesis. To better understand the mechanisms underlying purple-leaf formation, we analyzed the biosynthesis of three pigments (chlorophylls, carotenoids, and anthocyanins/flavonoids) by integrated metabolic and gene expression analyses in four purple-leaf tea cultivars including Camellia sinensis var. sinensis and var. assamica. Green-leaf and yellow-leaf cultivars were employed for comparison. The purple-leaf phenotype was mainly attributed to high anthocyanins and low chlorophylls. The purple-leaf phenotype led to other flavonoid changes including lowered monomeric catechin derivatives and elevated polymerized catechin derivatives. Gene expression analysis revealed that 4-coumarate: CoA ligase (4CL), anthocyanidin synthase (ANS), and UDP-glucose: flavonoid 3-O-glucosyltransferase (UFGT) genes in the anthocyanin biosynthetic pathway and the uroporphyrinogen decarboxylase (HEME) gene in the chlorophyll biosynthetic pathway were responsible for high anthocyanin and low chlorophyll, respectively. These findings provide insights into the mechanism of purple-leaf formation in tea cultivars.
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Affiliation(s)
- Ming-zhi Zhu
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Research Center for Development and Utilization of Medicinal Plants in Eastern Hubei Province, Hubei University of Education, Wuhan, China
| | - Fang Zhou
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Li-sha Ran
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
| | - Yi-long Li
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
| | - Bin Tan
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
| | - Kun-bo Wang
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- *Correspondence: Kun-bo Wang,
| | - Jian-an Huang
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Jian-an Huang,
| | - Zhong-hua Liu
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
- Zhong-hua Liu,
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21
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Gómez R, Figueroa N, Melzer M, Hajirezaei MR, Carrillo N, Lodeyro AF. Photosynthetic characterization of flavodoxin-expressing tobacco plants reveals a high light acclimation-like phenotype. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2020; 1861:148211. [PMID: 32315624 DOI: 10.1016/j.bbabio.2020.148211] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 03/17/2020] [Accepted: 04/14/2020] [Indexed: 01/15/2023]
Abstract
Flavodoxins are electron carrier flavoproteins present in bacteria and photosynthetic microorganisms which duplicate the functional properties of iron-sulphur containing ferredoxins and replace them under adverse environmental situations that lead to ferredoxin decline. When expressed in plant chloroplasts, flavodoxin complemented ferredoxin deficiency and improved tolerance to multiple sources of biotic, abiotic and xenobiotic stress. Analysis of flavodoxin-expressing plants grown under normal conditions, in which the two carriers are present, revealed phenotypic effects unrelated to ferredoxin replacement. Flavodoxin thus provided a tool to alter the chloroplast redox poise in a customized way and to investigate its consequences on plant physiology and development. We describe herein the effects exerted by the flavoprotein on the function of the photosynthetic machinery. Pigment analysis revealed significant increases in chlorophyll a, carotenoids and chlorophyll a/b ratio in flavodoxin-expressing tobacco lines. Results suggest smaller antenna size in these plants, supported by lower relative contents of light-harvesting complex proteins. Chlorophyll a fluorescence and P700 spectroscopy measurements indicated that transgenic plants displayed higher quantum yields for both photosystems, a more oxidized plastoquinone pool under steady-state conditions and faster plastoquinone dark oxidation after a pulse of saturating light. Many of these effects resemble the phenotypes exhibited by leaves adapted to high irradiation, a most common environmental hardship faced by plants growing in the field. The results suggest that flavodoxin-expressing plants would be better prepared to cope with this adverse situation, and concur with earlier observations reporting that hundreds of stress-responsive genes were induced in the absence of stress in these lines.
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Affiliation(s)
- Rodrigo Gómez
- Instituto de Biología Molecular y Celular de Rosario (IBR-UNR/CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), 2000 Rosario, Argentina
| | - Nicolás Figueroa
- Instituto de Biología Molecular y Celular de Rosario (IBR-UNR/CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), 2000 Rosario, Argentina
| | - Michael Melzer
- Leibniz Institute of Plant Genetics and Crop Plant Research, OT Gatersleben, Corrensstrasse 3, D-06466 Stadt Seeland, Germany
| | - Mohammad-Reza Hajirezaei
- Leibniz Institute of Plant Genetics and Crop Plant Research, OT Gatersleben, Corrensstrasse 3, D-06466 Stadt Seeland, Germany
| | - Néstor Carrillo
- Instituto de Biología Molecular y Celular de Rosario (IBR-UNR/CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), 2000 Rosario, Argentina
| | - Anabella F Lodeyro
- Instituto de Biología Molecular y Celular de Rosario (IBR-UNR/CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), 2000 Rosario, Argentina.
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22
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Knopp M, Garg SG, Handrich M, Gould SB. Major Changes in Plastid Protein Import and the Origin of the Chloroplastida. iScience 2020; 23:100896. [PMID: 32088393 PMCID: PMC7038456 DOI: 10.1016/j.isci.2020.100896] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/09/2020] [Accepted: 02/04/2020] [Indexed: 12/26/2022] Open
Abstract
Core components of plastid protein import and the principle of using N-terminal targeting sequences are conserved across the Archaeplastida, but lineage-specific differences exist. Here we compare, in light of plastid protein import, the response to high-light stress from representatives of the three archaeplastidal groups. Similar to land plants, Chlamydomonas reinhardtii displays a broad response to high-light stress, not observed to the same degree in the glaucophyte Cyanophora paradoxa or the rhodophyte Porphyridium purpureum. We find that only the Chloroplastida encode both Toc75 and Oep80 in parallel and suggest that elaborate high-light stress response is supported by changes in plastid protein import. We propose the origin of a phenylalanine-independent import pathway via Toc75 allowed higher import rates to rapidly service high-light stress, but with the cost of reduced specificity. Changes in plastid protein import define the origin of the green lineage, whose greatest evolutionary success was arguably the colonization of land. Chloroplastida evolved a dual system, Toc75/Oep80, for high throughput protein import Loss of F-based targeting led to dual organelle targeting using a single ambiguous NTS Relaxation of functional constraints allowed a wider Toc/Tic modification A broad response to high-light stress appears unique to Chloroplastida
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Affiliation(s)
- Michael Knopp
- Institute for Molecular Evolution, HH-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Sriram G Garg
- Institute for Molecular Evolution, HH-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Maria Handrich
- Institute for Molecular Evolution, HH-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Sven B Gould
- Institute for Molecular Evolution, HH-University Düsseldorf, 40225 Düsseldorf, Germany.
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23
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Hu A, Li M, Zhang L, Wang C, Fu S. Polyurethane-based bionic material simulating the Vis-NIR spectrum and thermal infrared properties of vegetation. RSC Adv 2019; 9:41438-41446. [PMID: 35541573 PMCID: PMC9076462 DOI: 10.1039/c9ra08312j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 12/09/2019] [Indexed: 11/21/2022] Open
Abstract
Poor stability, the toxicity of the used colorants and complex structure are the main problems for the current spectral simulation materials for vegetation. In this paper, a lightweight (0.052 g cm−3) and environmentally friendly bionic porous spectrum simulation material (BPSSM) was developed to simulate the Vis-NIR spectra of natural leaves. The porous structure of BPSSM was used to simulate the mesophyll tissue, which endows the BPSSM with a near-infrared plateau. Moreover, the relationship between pore structure (size, open porosity and volume density) and near-infrared plateau in the spectrum was also studied. The chlorophyll of leaves was simulated by vat dyes or organic pigments, and the green apex and red edge characteristics in the visible region were further adjusted by the chlorophyllin sodium copper salt. The water absorption of BPSSM with 100–120% water contents are consistent with the natural leaves spectral curve channel. Finally, the spectral correlation coefficients (rm) between BPSSM and different natural leaves are up to 0.984, suggesting that the BPSSM is universally applicable for the simulation of different leaves. Interestingly, the average radiant temperature difference between BPSSM and natural leaves is 0.25 °C within 24 hours, indicating it has similar thermal infrared properties to natural leaves. Moreover, the BPSSM can be combined with textiles to obtain a composite fabric, and its breaking strength and photostability were explored. Simulation of near-infrared and thermal infrared characteristics of leaves.![]()
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Affiliation(s)
- Anran Hu
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education Wuxi Jiangsu 214122 China
| | - Min Li
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education Wuxi Jiangsu 214122 China
| | - Liping Zhang
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education Wuxi Jiangsu 214122 China
| | - Chunxia Wang
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education Wuxi Jiangsu 214122 China
| | - Shaohai Fu
- Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education Wuxi Jiangsu 214122 China
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24
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Tang L, Hamid Y, Sahito ZA, Gurajala HK, He Z, Yang X. Effects of CO 2 application coupled with endophyte inoculation on rhizosphere characteristics and cadmium uptake by Sedum alfredii Hance in response to cadmium stress. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 239:287-298. [PMID: 30913479 DOI: 10.1016/j.jenvman.2019.03.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 03/14/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
Comparative impact of CO2 application and endophyte inoculation was investigated on the growth, rhizosphere characteristics, and cadmium (Cd) absorption of two ecotypes of Sedum alfredii Hance in response to Cd stress under hydroponic or rhizo-box culture conditions. The results showed that both CO2 application and endophyte inoculation significantly (P < 0.05) promoted plant growth (fresh weight and dry weight), improved root morphological properties (SRL, SRA, SRV, ARD and RTN) and exudation (pH, TOC, TN, soluble sugar and organic acids), changed Cd uptake and distribution of both ecotypes of S. alfredii. Meanwhile soil total and DTPA extractable Cd in rhizo-box decreased by biofortification treatments. Superposition biofortification exhibits utmost improvement for the above mentioned parameters, and has potential for enhancing phytoremediation efficiency of hyperaccumulator and sustaining regular growth of non-hyperaccumulator in Cd contaminated soils.
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Affiliation(s)
- Lin Tang
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Yasir Hamid
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Zulfiqar Ali Sahito
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Hanumanth Kumar Gurajala
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Zhenli He
- University of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, Florida, 34945, United States
| | - Xiaoe Yang
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
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25
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Araújo M, Ferreira de Oliveira JMP, Santos C, Moutinho-Pereira J, Correia C, Dias MC. Responses of olive plants exposed to different irrigation treatments in combination with heat shock: physiological and molecular mechanisms during exposure and recovery. PLANTA 2019; 249:1583-1598. [PMID: 30771046 DOI: 10.1007/s00425-019-03109-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
A water-deficit period, leading to stomatal control and overexpression of protective proteins (sHSP and DHN), contributes to olive´s tolerance to later imposed stress episodes. Aquaporins modulation is important in olive recovery. Olive is traditionally cultivated in dry farming or in high water demanding irrigated orchards. The impact of climate change on these orchards remains to unveil, as heat and drought episodes are increasing in the Mediterranean region. To understand how young plants face such stress episodes, olive plants growing in pots were exposed to well-irrigated and non-irrigated treatments. Subsequently, plants from each treatment were either exposed to 40 °C for 2 h or remained under control temperature. After treatments, all plants were allowed to grow under well-irrigated conditions (recovery). Leaves were compared for photosynthesis, relative water content, mineral status, pigments, carbohydrates, cell membrane permeability, lipid peroxidation and expression of the protective proteins' dehydrin (OeDHN1), heat-shock proteins (OeHSP18.3), and aquaporins (OePIP1.1 and OePIP2.1). Non-irrigation, whilst increasing carbohydrates, reduced some photosynthetic parameters to values below the ones of the well-irrigated plants. However, when both groups of plants were exposed to heat, well-irrigated plants suffered more drastic decreases of net CO2 assimilation rate and chlorophyll b than non-irrigated plants. Overall, OeDHN1 and OeHSP18.3 expression, which was increased in non-irrigated treatment, was potentiated by heat, possibly to counteract the increase of lipid peroxidation and loss of membrane integrity. Plants recovered similarly from both irrigation and temperature treatments, and recovery was associated with increased aquaporin expression in plants exposed to one type of stress (drought or heat). These data represent an important contribution for further understanding how dry-farming olive will cope with drought and heat episodes.
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Affiliation(s)
- Márcia Araújo
- Department of Life Science, Centre for Functional Ecology (CFE), University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
- Integrated Biology and Biotechnology Laboratory, Department of Biology, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal
- Center for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal
| | - José Miguel P Ferreira de Oliveira
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Conceição Santos
- Integrated Biology and Biotechnology Laboratory, Department of Biology, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal
- LAQV, REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | - José Moutinho-Pereira
- Center for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal
| | - Carlos Correia
- Center for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal
| | - Maria Celeste Dias
- Department of Life Science, Centre for Functional Ecology (CFE), University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal.
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
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26
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Wu K, Li J, Luo J, Liu Y, Song Y, Liu N, Rafiq MT, Li T. Effects of elevated CO 2 and endophytic bacterium on photosynthetic characteristics and cadmium accumulation in Sedum alfredii. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 643:357-366. [PMID: 29940447 DOI: 10.1016/j.scitotenv.2018.06.131] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/10/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Elevated CO2 and use of endophytic microorganisms have been considered as efficient and novel ways to improve phytoextraction efficiency. However, the interactive effects of elevated CO2 and endophytes on hyperaccumulator is poorly understood. In this study, a hydroponics experiment was conducted to investigate the combined effect of elevated CO2 (eCO2) and inoculation with endophyte SaMR12 (ES) on the photosynthetic characteristics and cadmium (Cd) accumulation in hyperaccumulator Sedum alfredii. The results showed that eCO2 × ES interaction promoted the growth of S. alfredii, shoot and root biomass net increment were increased by 264.7 and 392.3%, respectively, as compared with plants grown in ambient CO2 (aCO2). The interaction of eCO2 and ES significantly (P < 0.05) increased chlorophyll content (53.2%), Pn (111.6%), Pnmax (59.8%), AQY (65.1%), and Lsp (28.8%), but reduced Gs, Tr, Rd, and Lcp. Increased photosynthetic efficiency was associated with higher activities of rubisco, Ca2+-ATPase, and Mg2+-ATPase, and linked with over-expression of two photosystem related genes (SaPsbS and SaLhcb2). PS II activities were significantly (P < 0.05) enhanced with Fv/Fm and Φ(II) increased by 12.3 and 13.0%, respectively, compared with plants grown in aCO2. In addition, the net uptake of Cd in the shoot and root tissue of S. alfredii grown in eCO2 × ES treatment was increased by 260.7 and 434.9%, respectively, due to increased expression of SaHMA2 and SaCAX2 Cd transporter genes. Our results suggest that eCO2 × ES can promote the growth of S. alfredii due to increased photosynthetic efficiency, and improve Cd accumulation and showed considerable potential of improving the phytoextraction ability of Cd by S. alfredii.
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Affiliation(s)
- Keren Wu
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jinxing Li
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jipeng Luo
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuankun Liu
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuchao Song
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Nanlin Liu
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Muhammad Tariq Rafiq
- Department of Environmental Science International Islamic University Islamabad, Pakistan
| | - Tingqiang Li
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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Tränkner M, Tavakol E, Jákli B. Functioning of potassium and magnesium in photosynthesis, photosynthate translocation and photoprotection. PHYSIOLOGIA PLANTARUM 2018; 163:414-431. [PMID: 29667201 DOI: 10.1111/ppl.12747] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/22/2018] [Accepted: 04/10/2018] [Indexed: 05/03/2023]
Abstract
Potassium (K) and magnesium (Mg) are mineral nutrients that are required in large quantities by plants. Both elements critically contribute to the process of photosynthesis and the subsequent long-distance transport of photoassimilates. If K or Mg is not present in sufficient quantities in photosynthetic tissues, complex interactions of anatomical, physiological and biochemical responses result in a reduction of photosynthetic carbon assimilation. As a consequence, excessive production of reactive oxygen species causes photo-oxidation of the photosynthetic apparatus and causes an up-regulation of photoprotective mechanisms. In this article, we review the functioning of K and Mg in processes directly or indirectly associated with photosynthesis. Focus is given to chloroplast ultrastructure, light-dependent and -independent reactions of photosynthesis and the diffusion of CO2 - a major substrate for photosynthesis - into chloroplasts. We further emphasize their contribution to phloem-loading and long-distance transport of photoassimilates and to the photoprotection of the photosynthetic apparatus.
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Affiliation(s)
- Merle Tränkner
- Institute of Applied Plant Nutrition (IAPN), Georg-August University Goettingen, 37075, Goettingen, Germany
| | | | - Bálint Jákli
- Department of Crop Science, Section of Plant Nutrition & Crop Physiology, Georg-August University Goettingen, 37075, Goettingen, Germany
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Sato T, Shimoda Y, Matsuda K, Tanaka A, Ito H. Mg-dechelation of chlorophyll a by Stay-Green activates chlorophyll b degradation through expressing Non-Yellow Coloring 1 in Arabidopsis thaliana. JOURNAL OF PLANT PHYSIOLOGY 2018; 222:94-102. [PMID: 29425814 DOI: 10.1016/j.jplph.2018.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 12/19/2017] [Accepted: 01/30/2018] [Indexed: 06/08/2023]
Abstract
The first step in chlorophyll a degradation is the extraction of the central Mg. This reaction is catalyzed by Mg-dechelatase encoded by Stay-Green (SGR) in land plants. SGR extracts Mg from chlorophyll a but not from chlorophyll b, and chlorophyll b must be converted to chlorophyll a before degradation. The first reaction of the chlorophyll b to chlorophyll a conversion is catalyzed by chlorophyll b reductase. Non-Yellow Coloring 1 (NYC1) and NYC1 like (NOL) are isozymes of chlorophyll b reductase. When SGR was transiently overexpressed in Arabidopsis, both chlorophyll a and b were degraded, suggesting that the chlorophyll b to chlorophyll a conversion is activated by SGR overexpression. To examine the involvement of chlorophyll b reductases in SGR-induced chlorophyll b degradation, SGR was transiently overexpressed in nyc1, nol, and nyc1 nol double mutants by dexamethasone treatment. It was found that in the wild type and nol mutant, chlorophyll a and b were degraded and all the chlorophyll-binding proteins decreased. Meanwhile, in nyc1 and nyc1 nol mutants, chlorophyll b degradation was suppressed and the light-harvesting complex of photosystem II remained. The mRNA and protein levels of NYC1 increased after SGR overexpression in wild type plants. These results suggest that Mg-dechelation of chlorophyll a by SGR activates chlorophyll b degradation by inducing the expression of NYC1. This is an effective regulation of a metabolic pathway.
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Affiliation(s)
- Tomoaki Sato
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Yousuke Shimoda
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Kaori Matsuda
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Ayumi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan
| | - Hisashi Ito
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Sapporo, 060-0819, Japan.
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Chauhan R, Awasthi S, Tripathi P, Mishra S, Dwivedi S, Niranjan A, Mallick S, Tripathi P, Pande V, Tripathi RD. Selenite modulates the level of phenolics and nutrient element to alleviate the toxicity of arsenite in rice (Oryza sativa L.). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 138:47-55. [PMID: 28006731 DOI: 10.1016/j.ecoenv.2016.11.015] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 11/16/2016] [Accepted: 11/24/2016] [Indexed: 05/09/2023]
Abstract
Arsenic (As) contamination of paddy rice is a serious threat all over the world particularly in South East Asia. Selenium (Se) plays important role in protection of plants against various abiotic stresses including heavy metals. Moreover, arsenite (AsIII) and selenite (SeIV) can be biologically antagonistic due to similar electronic configuration and sharing the common transporter for their uptake in plant. In the present study, the response of oxidative stress, phenolic compounds and nutrient elements was analyzed to investigate Se mediated As tolerance in rice seedlings during AsIII and SeIV exposure in hydroponics. Selenite (25µM) significantly decreased As accumulation in plant than As (25µM) alone treated plants. Level of oxidative stress related parameters viz., reactive oxygen species (ROS), lipid peroxidation, electrical conductivity, nitric oxide and pro-oxidant enzyme (NADPH oxidase), were in the order of As>As+Se>control>Se. Selenium ameliorated As phytotoxicity by increased level of phenolic compounds particularly gallic acid, protocatechuic acid, ferulic acid and rutin and thiol metabolism related enzymes viz., serine acetyl transferase (SAT) and cysteine synthase (CS). Selenium supplementation enhanced the uptake of nutrient elements viz., Fe, Mn, Co, Cu, Zn, Mo, and improved plant growth. The results concluded that Se addition in As contaminated environment might be an important strategy to reduce As uptake and associated phytotoxicity in rice plant by modulation of phenolic compounds and increased uptake of nutrient elements.
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Affiliation(s)
- Reshu Chauhan
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India; Department of Biotechnology, Kumaun University, Bhimtal, Nainital, Uttarakhand
| | - Surabhi Awasthi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Preeti Tripathi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Seema Mishra
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Sanjay Dwivedi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Abhishek Niranjan
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Shekhar Mallick
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Pratibha Tripathi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Bhimtal, Nainital, Uttarakhand
| | - Rudra Deo Tripathi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow 226001, India.
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Prasad R, Shabnam N, Pardha-Saradhi P. Immobilization on cotton cloth pieces is ideal for storage and conservation of microalgae. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.10.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Jia T, Ito H, Tanaka A. Simultaneous regulation of antenna size and photosystem I/II stoichiometry in Arabidopsis thaliana. PLANTA 2016; 244:1041-1053. [PMID: 27394155 DOI: 10.1007/s00425-016-2568-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 07/06/2016] [Indexed: 05/10/2023]
Abstract
The photosystem I/II ratio increased when antenna size was enlarged by transient induction of CAO in chlorophyll b -less mutants, thus indicating simultaneous regulation of antenna size and photosystem I/II stoichiometry. Regulation of antenna size and photosystem I/II stoichiometry is an indispensable strategy for plants to acclimate to changes to light environments. When plants grown in high-light conditions are transferred to low-light conditions, the peripheral antennae of photosystems are enlarged. A change in the photosystem I/II ratio is also observed under the same light conditions. However, our knowledge of the correlation between antenna size modulation and variation in photosystem I/II stoichiometry remains limited. In this study, chlorophyll a oxygenase was transiently induced in Arabidopsis thaliana chlorophyll b-less mutants, ch1-1, to alter the antenna size without changing environmental conditions. In addition to the accumulation of chlorophyll b, the levels of the peripheral antenna complexes of both photosystems gradually increased, and these were assembled to the core antenna of both photosystems. However, the antenna size of photosystem II was greater than that of photosystem I. Immunoblot analysis of core antenna proteins showed that the number of photosystem I increased, but not that of photosystem II, resulting in an increase in the photosystem I/II ratio. These results clearly indicate that antenna size adjustment was coupled with changes in photosystem I/II stoichiometry. Based on these results, the physiological importance of simultaneous regulation of antenna size and photosystem I/II stoichiometry is discussed in relation to acclimation to light conditions.
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Affiliation(s)
- Ting Jia
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Kita-ku, Sapporo, 060-0819, Japan
| | - Hisashi Ito
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Kita-ku, Sapporo, 060-0819, Japan.
- CREST, Japan Science and Technology Agency, N19 W8, Kita-ku, Sapporo, 060-0819, Japan.
| | - Ayumi Tanaka
- Institute of Low Temperature Science, Hokkaido University, N19 W8, Kita-ku, Sapporo, 060-0819, Japan
- CREST, Japan Science and Technology Agency, N19 W8, Kita-ku, Sapporo, 060-0819, Japan
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32
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Bettini PP, Marvasi M, Fani F, Lazzara L, Cosi E, Melani L, Mauro ML. Agrobacterium rhizogenes rolB gene affects photosynthesis and chlorophyll content in transgenic tomato (Solanum lycopersicum L.) plants. JOURNAL OF PLANT PHYSIOLOGY 2016; 204:27-35. [PMID: 27497742 DOI: 10.1016/j.jplph.2016.07.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 07/15/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
Insertion of Agrobacterium rhizogenes rolB gene into plant genome affects plant development, hormone balance and defence. However, beside the current research, the overall transcriptional response and gene expression of rolB as a modulator in plant is unknown. Transformed rolB tomato plant (Solanum lycopersicum L.) cultivar Tondino has been used to investigate the differential expression profile. Tomato is a well-known model organism both at the genetic and molecular level, and one of the most important commercial food crops in the world. Through the construction and characterization of a cDNA subtracted library, we have investigated the differential gene expression between transgenic clones of rolB and control tomato and have evaluated genes specifically transcribed in transgenic rolB plants. Among the selected genes, five genes encoding for chlorophyll a/b binding protein, carbonic anhydrase, cytochrome b6/f complex Fe-S subunit, potassium efflux antiporter 3, and chloroplast small heat-shock protein, all involved in chloroplast function, were identified. Measurement of photosynthesis efficiency by the level of three different photosynthetic parameters (Fv/Fm, rETR, NPQ) showed rolB significant increase in non-photochemical quenching and a, b chlorophyll content. Our results point to highlight the role of rolB on plant fitness by improving photosynthesis.
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Affiliation(s)
- Priscilla P Bettini
- Dipartimento di Biologia, Università degli Studi di Firenze, via Madonna del Piano 6, 50019, Sesto Fiorentino (FI), Italy.
| | - Massimiliano Marvasi
- Dipartimento di Biologia, Università degli Studi di Firenze, via Madonna del Piano 6, 50019, Sesto Fiorentino (FI), Italy.
| | - Fabiola Fani
- Dipartimento di Biologia, Università degli Studi di Firenze, via Madonna del Piano 6, 50019, Sesto Fiorentino (FI), Italy.
| | - Luigi Lazzara
- Dipartimento di Biologia, Università degli Studi di Firenze, via Madonna del Piano 6, 50019, Sesto Fiorentino (FI), Italy.
| | - Elena Cosi
- Dipartimento di Biologia, Università degli Studi di Firenze, via Madonna del Piano 6, 50019, Sesto Fiorentino (FI), Italy.
| | - Lorenzo Melani
- Dipartimento di Biologia, Università degli Studi di Firenze, via Madonna del Piano 6, 50019, Sesto Fiorentino (FI), Italy.
| | - Maria Luisa Mauro
- Dipartimento di Biologia e Biotecnologie, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy.
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Goold HD, Nguyen HM, Kong F, Beyly-Adriano A, Légeret B, Billon E, Cuiné S, Beisson F, Peltier G, Li-Beisson Y. Whole Genome Re-Sequencing Identifies a Quantitative Trait Locus Repressing Carbon Reserve Accumulation during Optimal Growth in Chlamydomonas reinhardtii. Sci Rep 2016; 6:25209. [PMID: 27141848 PMCID: PMC4855234 DOI: 10.1038/srep25209] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 04/13/2016] [Indexed: 02/08/2023] Open
Abstract
Microalgae have emerged as a promising source for biofuel production. Massive oil and starch accumulation in microalgae is possible, but occurs mostly when biomass growth is impaired. The molecular networks underlying the negative correlation between growth and reserve formation are not known. Thus isolation of strains capable of accumulating carbon reserves during optimal growth would be highly desirable. To this end, we screened an insertional mutant library of Chlamydomonas reinhardtii for alterations in oil content. A mutant accumulating five times more oil and twice more starch than wild-type during optimal growth was isolated and named constitutive oil accumulator 1 (coa1). Growth in photobioreactors under highly controlled conditions revealed that the increase in oil and starch content in coa1 was dependent on light intensity. Genetic analysis and DNA hybridization pointed to a single insertional event responsible for the phenotype. Whole genome re-sequencing identified in coa1 a >200 kb deletion on chromosome 14 containing 41 genes. This study demonstrates that, 1), the generation of algal strains accumulating higher reserve amount without compromising biomass accumulation is feasible; 2), light is an important parameter in phenotypic analysis; and 3), a chromosomal region (Quantitative Trait Locus) acts as suppressor of carbon reserve accumulation during optimal growth.
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Affiliation(s)
- Hugh Douglas Goold
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France.,Faculty of Agriculture and the Environment, University of Sydney, Australia
| | - Hoa Mai Nguyen
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Fantao Kong
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Audrey Beyly-Adriano
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Bertrand Légeret
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Emmanuelle Billon
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Stéphan Cuiné
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Fred Beisson
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Gilles Peltier
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
| | - Yonghua Li-Beisson
- CEA, BIAM, Lab Bioenerget Biotechnol Bacteries &Microalgues, Saint-Paul-lez-Durance, 13108, France.,CNRS, UMR 7265 Biol Veget &Microbiol Environ, Saint-Paul-lez-Durance, 13108, France.,Aix Marseille Université, BVME UMR7265, Marseille, 13284, France
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Voitsekhovskaja OV, Tyutereva EV. Chlorophyll b in angiosperms: Functions in photosynthesis, signaling and ontogenetic regulation. JOURNAL OF PLANT PHYSIOLOGY 2015; 189:51-64. [PMID: 26513460 DOI: 10.1016/j.jplph.2015.09.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/10/2015] [Accepted: 09/11/2015] [Indexed: 05/22/2023]
Abstract
Chlorophyll b (Chlb) is an antenna chlorophyll. The binding of Chlb by antenna proteins is crucial for the correct assembly of the antenna complexes in thylakoid membranes. Since the levels of the proteins of major and minor antenna are affected to different extents by Chlb binding, the availability of Chlb influences the composition and the size of antenna complexes which in turn determine the supramolecular organization of the thylakoid membranes in grana. Therefore, Chlb synthesis levels have a major impact on lateral mobility and diffusion of membrane molecules, and thus affect not only light harvesting and thermal energy dissipation processes, but also linear electron transport and repair processes in grana. Furthermore, in angiosperms Chlb synthesis affects plant functions beyond chloroplasts. First, the stability of pigment-protein complexes in the antennae, which depends on Chlb, is an important factor in the regulation of plant ontogenesis, and Chlb levels were recently shown to influence plant ontogenetic signaling. Second, the amounts of minor antenna proteins in chloroplasts, which depend on the availability of Chlb, were recently shown to affect ABA levels and signaling in plants. These mechanisms can be examined in mutants where Chlb synthesis is reduced or abolished. The dramatic effects caused by the lack of Chlb on plant productivity are interpreted in this review in light of the pleiotropic effects on photosynthesis and signaling, and the potential to manipulate Chlb biosynthesis for the improvement of crop production is discussed.
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Affiliation(s)
- O V Voitsekhovskaja
- Komarov Botanical Institute, Russian Academy of Sciences, Plant Ecological Physiology, ul. Professora Popova, 2, 197376 St. Petersburg, Russia.
| | - E V Tyutereva
- Komarov Botanical Institute, Russian Academy of Sciences, Plant Ecological Physiology, ul. Professora Popova, 2, 197376 St. Petersburg, Russia
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