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Yang W, Hu Y, Liu J, Rao X, Huang X, Guo X, Zhang J, Rensing C, Xing S, Zhang L. Physiology and transcriptomic analysis revealed the mechanism of silicon promoting cadmium accumulation in Sedum alfredii Hance. CHEMOSPHERE 2024; 360:142417. [PMID: 38797210 DOI: 10.1016/j.chemosphere.2024.142417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 05/15/2024] [Accepted: 05/22/2024] [Indexed: 05/29/2024]
Abstract
Silicon (Si) effectively promote the yield of many crops, mainly due to its ability to enhance plants resistance to stress. However, how Si helps hyperaccumulators to extract Cadmium (Cd) from soil has remained unclear. In this study, Sedum alfredii Hance (S. alfredii) was used as material to study how exogenous Si affected biomass, Cd accumulation, antioxidation, cell ultrastructure, subcellular distribution and changes in gene expression after Cd exposure. The study has shown that as Si concentration increases (1, 2 mM), the shoot biomass of plants increased by 33.1%-63.6%, the Cd accumulation increased by 31.9%-96.6%, and the chlorophyll, carotenoid content, photosynthetic gas exchange parameters significantly increased. Si reduced Pro and MDA, promoted the concentrations of SOD, CAT and POD to reduce antioxidant stress damage. In addition, Si promoted GSH and PC to chelate Cd in vacuoles, repaired damaged cell ultrastructure, improved the fixation of Cd and cell wall (especially in pectin), and reduced the toxic effects of Cd. Transcriptome analysis found that genes encoding Cd detoxification, Cd absorption and transport were up-regulated by Si supplying, including photosynthetic pathways (PSB, LHCB, PSA), antioxidant defense systems (CAT, APX, CSD, RBOH), cell wall biosynthesis such as pectinesterase (PME), chelation (GST, MT, NAS, GR), Cd absorption (Nramp3, Nramp5, ZNT) and Cd transport (HMA, PCR). Our result revealed the tentative mechanism of Si promotes Cd accumulation and enhances Cd tolerance in S. alfredii, and thereby provides a solid theoretical support for the practical use of Si fertilizer in phytoextraction.
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Affiliation(s)
- Wenhao Yang
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Ying Hu
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jing Liu
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xinhao Rao
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xinyu Huang
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xingjie Guo
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - JinLin Zhang
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Center for Grassland Microbiome, State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Christopher Rensing
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Shihe Xing
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Liming Zhang
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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2
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Xia X, Hao L, Sun Y, Lv Y, Wang Y, Wu H, Jiang Z, Li X, Yan Y, Chen X, Li B, Li H, Li M, Sun Y, Ren W, Xue Y, You Q, Zhu L, Liao Q, Xie S, Zhang Y, Zhao C, Zhu H, Liang C, Qiu J, Song Z, Deng Y, Pan Y, Zou Y, Zhang Y, Yang Y. Unravelling chilling-stress resistance mechanisms in endangered Mangrove plant Lumnitzera littorea (Jack) Voigt. MARINE ENVIRONMENTAL RESEARCH 2023; 192:106210. [PMID: 37788964 DOI: 10.1016/j.marenvres.2023.106210] [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: 05/17/2023] [Revised: 09/03/2023] [Accepted: 09/25/2023] [Indexed: 10/05/2023]
Abstract
Lumnitzera littorea (Jack) Voigt is one of the most endangered mangrove species in China. Previous studies have showed the impact of chilling stress on L. littorea and the repsonses at physiological and biochemical levels, but few attentions have been paid at molecular level. In this study, we conducted genome-wide investigation of transcriptional and post-transcriptional dynamics in L. littorea in response to chilling stress (8 °C day/5 °C night). In the seedlings of L. littorea, chilling sensing and signal transducing, photosystem II regeneration and peroxidase-mediated reactive oxygen species (ROS) scavenging were substantially enhanced to combat the adverse impact induced by chilling exposure. We further revealed that alternative polyadenylation (APA) events participated in chilling stress-responsive processes, including energy metabolism and steroid biosynthesis. Furthermore, APA-mediated miRNA regulations downregulated the expression of the genes involved in fatty acid biosynthesis and elongation, and protein phosphorylation, reflecting the important role of post-transcriptional regulation in modulating chilling tolerance in L. littorea. Our findings present a molecular view to the adaptive characteristics of L. littorea and shed light on the conservation genomic approaches of endangered mangrove species.
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Affiliation(s)
- Xinhui Xia
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Lulu Hao
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China; Mangrove Institute, Lingnan Normal University, Zhanjiang, 524048, China
| | - Yifei Sun
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yiqing Lv
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yihong Wang
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Haiyu Wu
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Zongjin Jiang
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Xinru Li
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yuhan Yan
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Xiaojian Chen
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Binghou Li
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Hao Li
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Minhui Li
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yuanyuan Sun
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Wenxu Ren
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yalin Xue
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Qing You
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Lei Zhu
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Qiuchang Liao
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Shiyun Xie
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yunsen Zhang
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Chunyu Zhao
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Haowen Zhu
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Chengrui Liang
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Jin Qiu
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Zilong Song
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yeyu Deng
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Ying Pan
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Yuan Zou
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China
| | - Ying Zhang
- Mangrove Institute, Lingnan Normal University, Zhanjiang, 524048, China.
| | - Yuchen Yang
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, 518107, China.
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Fadeeva M, Klaiman D, Caspy I, Nelson N. Structure of Chlorella ohadii Photosystem II Reveals Protective Mechanisms against Environmental Stress. Cells 2023; 12:1971. [PMID: 37566050 PMCID: PMC10416949 DOI: 10.3390/cells12151971] [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: 07/05/2023] [Revised: 07/23/2023] [Accepted: 07/29/2023] [Indexed: 08/12/2023] Open
Abstract
Green alga Chlorella ohadii is known for its ability to carry out photosynthesis under harsh conditions. Using cryogenic electron microscopy (cryoEM), we obtained a high-resolution structure of PSII at 2.72 Å. This structure revealed 64 subunits, which encompassed 386 chlorophylls, 86 carotenoids, four plastoquinones, and several structural lipids. At the luminal side of PSII, a unique subunit arrangement was observed to protect the oxygen-evolving complex. This arrangement involved PsbO (OEE1), PsbP (OEE2), PsbB, and PsbU (a homolog of plant OEE3). PsbU interacted with PsbO, PsbC, and PsbP, thereby stabilizing the shield of the oxygen-evolving complex. Significant changes were also observed at the stromal electron acceptor side. PsbY, identified as a transmembrane helix, was situated alongside PsbF and PsbE, which enclosed cytochrome b559. Supported by the adjacent C-terminal helix of Psb10, these four transmembrane helices formed a bundle that shielded cytochrome b559 from the surrounding solvent. Moreover, the bulk of Psb10 formed a protective cap, which safeguarded the quinone site and likely contributed to the stacking of PSII complexes. Based on our findings, we propose a protective mechanism that prevents QB (plastoquinone B) from becoming fully reduced. This mechanism offers insights into the regulation of electron transfer within PSII.
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Affiliation(s)
| | | | | | - Nathan Nelson
- Department of Biochemistry and Molecular Biology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel; (M.F.); (D.K.); (I.C.)
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Sun Q, Wang T, Huang J, Gu X, Dong Y, Yang Y, Da X, Mo X, Xie X, Jiang H, Yan D, Zheng B, He Y. Transcriptome Analysis Reveals the Response Mechanism of Digitaria sanguinalis, Arabidopsis thaliana and Poa annua under 4,8-Dihydroxy-1-tetralone Treatment. PLANTS (BASEL, SWITZERLAND) 2023; 12:2728. [PMID: 37514341 PMCID: PMC10385526 DOI: 10.3390/plants12142728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/17/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
4,8-dihydroxy-l-tetralone (4,8-DHT) is an allelochemical isolated from the outer bark of Carya cathayensis that acts as a plant growth inhibitor. In order to explore the mechanism of 4,8-DHT inhibiting weed activity, we treated three species of Digitaria sanguinalis, Arabidopsis thaliana, and Poa annua with different concentrations of 4,8-DHT and performed phenotype observation and transcriptome sequencing. The results showed that with an increase in 4,8-DHT concentration, the degree of plant damage gradually deepened. Under the same concentration of 4,8-DHT, the damage degree of leaves and roots of Digitaria sanguinalis was the greatest, followed by Arabidopsis thaliana, while Poa annua had the least damage, and the leaves turned slightly yellow. Transcriptome data showed that 24536, 9913, and 1662 differentially expressed genes (DEGs) were identified in Digitaria sanguinalis, Arabidopsis thaliana, and Poa annua, respectively. These DEGs were significantly enriched in photosynthesis, carbon fixation, glutathione metabolism, phenylpropanoid biosynthesis, and oxidative phosphorylation pathways. In addition, DEGs were also enriched in plant hormone signal transduction and the MAPK signal pathway in Arabidopsis thaliana. Further analysis showed that after 4,8-DHT treatment, the transcript levels of photosynthesis PSI- and PSII-related genes, LHCA/B-related genes, Rubisco, and PEPC were significantly decreased in Digitaria sanguinalis and Arabidopsis thaliana. At the same time, the transcription levels of genes related to glutathione metabolism and the phenylpropanoid biosynthesis pathway in Digitaria sanguinalis were also significantly decreased. However, the expression of these genes was upregulated in Arabidopsis thaliana and Poa annua. These indicated that 4,8-DHT affected the growth of the three plants through different physiological pathways, and then played a role in inhibiting plant growth. Simultaneously, the extent to which plants were affected depended on the tested plants and the content of 4,8-DHT. The identification of weed genes that respond to 4,8-DHT has helped us to further understand the inhibition of plant growth by allelochemicals and has provided a scientific basis for the development of allelochemicals as herbicides.
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Affiliation(s)
- Qiumin Sun
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
| | - Tao Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
| | - Jiu Huang
- School of Environment science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Xinyi Gu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
| | - Yanling Dong
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
| | - Ying Yang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Xiaowen Da
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, China
| | - Xiaorong Mo
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, China
| | - Xiaoting Xie
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Hangjin Jiang
- Center for Data Science, Zhejiang University, Hangzhou 310058, China
| | - Daoliang Yan
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
| | - Bingsong Zheng
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
| | - Yi He
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
- Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Hangzhou 311300, China
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Fadeeva M, Klaiman D, Caspy I, Nelson N. CryoEM PSII structure reveals adaptation mechanisms to environmental stress in Chlorella ohadii. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.04.539358. [PMID: 37205566 PMCID: PMC10187303 DOI: 10.1101/2023.05.04.539358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Performing photosynthesis in the desert is a challenging task since it requires a fast adaptation to extreme illumination and temperature changes. To understand adaptive mechanisms, we purified Photosystem II (PSII) from Chlorella ohadii , a green alga from the desert soil surface, and identified structural elements that might enable the photosystem functioning under harsh conditions. The 2.72 Å cryogenic electron-microscopy (cryoEM) structure of PSII exhibited 64 subunits, encompassing 386 chlorophylls, 86 carotenoids, four plastoquinones, and several structural lipids. At the luminal side of PSII, the oxygen evolving complex was protected by a unique subunit arrangement - PsbO (OEE1), PsbP (OEE2), CP47, and PsbU (plant OEE3 homolog). PsbU interacted with PsbO, CP43, and PsbP, thus stabilising the oxygen evolving shield. Substantial changes were observed on the stromal electron acceptor side - PsbY was identified as a transmembrane helix situated alongside PsbF and PsbE enclosing cytochrome b559, supported by the adjacent C-terminal helix of Psb10. These four transmembrane helices bundled jointly, shielding cytochrome b559 from the solvent. The bulk of Psb10 formed a cap protecting the quinone site and probably contributed to the PSII stacking. So far, the C. ohadii PSII structure is the most complete description of the complex, suggesting numerous future experiments. A protective mechanism that prevented Q B from rendering itself fully reduced is proposed.
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Affiliation(s)
| | | | - Ido Caspy
- Department of Biochemistry and Molecular Biology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978 Tel Aviv, Israel
| | - Nathan Nelson
- Department of Biochemistry and Molecular Biology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978 Tel Aviv, Israel
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Zhou T, Cao L, Hu K, Yu X, Qu S. miR164-NAC21/22 module regulates the resistance of Malus hupehensis against Alternaria alternata by controlling jasmonic acid signaling. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 330:111635. [PMID: 36787851 DOI: 10.1016/j.plantsci.2023.111635] [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: 10/24/2022] [Revised: 01/06/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Apple leaf spot disease caused by Alternaria alternata apple pathotype (A. alternata AP) is one of the most severe fungal diseases affecting apple cultivation. Transcription factors are involved in various disease-resistance responses, and many of them are regulated by miRNAs. Here, we performed RNA-Seq to investigate gene expression changes during the defense response of Malus hupehensis against A. alternata AP. NAC21/22 was induced upon A. alternata AP infection and silenced by miR164 via direct mRNA cleavage. Contrasting expression patterns were noted between mature miR164 and NAC21/22 during infection. Contrary to NAC21/22 silencing, transiently overexpressing NAC21/22 in M. hupehensis alleviated disease symptoms on 'gala' leaves, impeded A. alternata AP growth, and promoted jasmonic acid (JA) signaling-related gene expression. Importantly, transient miR164f overexpression in 'gala' leaves enhanced A. alternata AP sensitivity, due perhaps to NAC21/22 downregulation, whereas miR164 suppression produced an opposite effect. In summary, the miR164-NAC21/22 module plays a pivotal role in apple resistance against A. alternata AP by regulating JA signaling.
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Affiliation(s)
- Tingting Zhou
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
| | - Lifang Cao
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
| | - Kaixu Hu
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
| | - Xinyi Yu
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
| | - Shenchun Qu
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
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Huang C, Peng J, Zhang W, Chethana T, Wang X, Wang H, Yan J. LtGAPR1 Is a Novel Secreted Effector from Lasiodiplodia theobromae That Interacts with NbPsQ2 to Negatively Regulate Infection. J Fungi (Basel) 2023; 9:jof9020188. [PMID: 36836303 PMCID: PMC9967411 DOI: 10.3390/jof9020188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/26/2023] [Accepted: 01/26/2023] [Indexed: 02/04/2023] Open
Abstract
The effector proteins secreted by a pathogen not only promote the virulence and infection of the pathogen but also trigger plant defense response. Lasiodiplodia theobromae secretes many effectors that modulate and hijack grape processes to colonize host cells, but the underlying mechanisms remain unclear. Herein, we report LtGAPR1, which has been proven to be a secreted protein. In our study, LtGAPR1 played a negative role in virulence. By co-immunoprecipitation, 23 kDa oxygen-evolving enhancer 2 (NbPsbQ2) was identified as a host target of LtGAPR1. The overexpression of NbPsbQ2 in Nicotiana benthamiana reduced susceptibility to L. theobromae, and the silencing of NbPsbQ2 enhanced L. theobromae infection. LtGAPR1 and NbPsbQ2 were confirmed to interact with each other. Transiently, expressed LtGAPR1 activated reactive oxygen species (ROS) production in N. benthamiana leaves. However, in NbPsbQ2-silenced leaves, ROS production was impaired. Overall, our report revealed that LtGAPR1 promotes ROS accumulation by interacting with NbPsbQ2, thereby triggering plant defenses that negatively regulate infection.
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Affiliation(s)
- Caiping Huang
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Junbo Peng
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Wei Zhang
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Thilini Chethana
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Xuncheng Wang
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Hui Wang
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Jiye Yan
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
- Correspondence: ; Tel.: +86-010-5150-3212
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Bai WP, Li HJ, Hepworth SR, Liu HS, Liu LB, Wang GN, Ma Q, Bao AK, Wang SM. Physiological and transcriptomic analyses provide insight into thermotolerance in desert plant Zygophyllum xanthoxylum. BMC PLANT BIOLOGY 2023; 23:7. [PMID: 36600201 PMCID: PMC9814312 DOI: 10.1186/s12870-022-04024-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 12/22/2022] [Indexed: 05/25/2023]
Abstract
BACKGROUND Heat stress has adverse effects on the growth and reproduction of plants. Zygophyllum xanthoxylum, a typical xerophyte, is a dominant species in the desert where summer temperatures are around 40 °C. However, the mechanism underlying the thermotolerance of Z. xanthoxylum remained unclear. RESULTS Here, we characterized the acclimation of Z. xanthoxylum to heat using a combination of physiological measurements and transcriptional profiles under treatments at 40 °C and 45 °C, respectively. Strikingly, moderate high temperature (40 °C) led to an increase in photosynthetic capacity and superior plant performance, whereas severe high temperature (45 °C) was accompanied by reduced photosynthetic capacity and inhibited growth. Transcriptome profiling indicated that the differentially expressed genes (DEGs) were related to transcription factor activity, protein folding and photosynthesis under heat conditions. Furthermore, numerous genes encoding heat transcription shock factors (HSFs) and heat shock proteins (HSPs) were significantly up-regulated under heat treatments, which were correlated with thermotolerance of Z. xanthoxylum. Interestingly, the up-regulation of PSI and PSII genes and the down-regulation of chlorophyll catabolism genes likely contribute to improving plant performance of Z. xanthoxylum under moderate high temperature. CONCLUSIONS We identified key genes associated with of thermotolerance and growth in Z. xanthoxylum, which provide significant insights into the regulatory mechanisms of thermotolerance and growth regulation in Z. xanthoxylum under high temperature conditions.
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Affiliation(s)
- Wan-Peng Bai
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Hu-Jun Li
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Shelley R Hepworth
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
- Department of Biology, Institute of Biochemistry, Carleton University, Ottawa, ON, Canada
| | - Hai-Shuang Liu
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Lin-Bo Liu
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Gai-Ni Wang
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Qing Ma
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Ai-Ke Bao
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China
| | - Suo-Min Wang
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, People's Republic of China.
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9
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Timilsena PR, Barrett CF, Piñeyro-Nelson A, Wafula EK, Ayyampalayam S, McNeal JR, Yukawa T, Givnish TJ, Graham SW, Pires JC, Davis JI, Ané C, Stevenson DW, Leebens-Mack J, Martínez-Salas E, Álvarez-Buylla ER, dePamphilis CW. Phylotranscriptomic Analyses of Mycoheterotrophic Monocots Show a Continuum of Convergent Evolutionary Changes in Expressed Nuclear Genes From Three Independent Nonphotosynthetic Lineages. Genome Biol Evol 2022; 15:6965378. [PMID: 36582124 PMCID: PMC9887272 DOI: 10.1093/gbe/evac183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/13/2022] [Accepted: 12/18/2022] [Indexed: 12/31/2022] Open
Abstract
Mycoheterotrophy is an alternative nutritional strategy whereby plants obtain sugars and other nutrients from soil fungi. Mycoheterotrophy and associated loss of photosynthesis have evolved repeatedly in plants, particularly in monocots. Although reductive evolution of plastomes in mycoheterotrophs is well documented, the dynamics of nuclear genome evolution remains largely unknown. Transcriptome datasets were generated from four mycoheterotrophs in three families (Orchidaceae, Burmanniaceae, Triuridaceae) and related green plants and used for phylogenomic analyses to resolve relationships among the mycoheterotrophs, their relatives, and representatives across the monocots. Phylogenetic trees based on 602 genes were mostly congruent with plastome phylogenies, except for an Asparagales + Liliales clade inferred in the nuclear trees. Reduction and loss of chlorophyll synthesis and photosynthetic gene expression and relaxation of purifying selection on retained genes were progressive, with greater loss in older nonphotosynthetic lineages. One hundred seventy-four of 1375 plant benchmark universally conserved orthologous genes were undetected in any mycoheterotroph transcriptome or the genome of the mycoheterotrophic orchid Gastrodia but were expressed in green relatives, providing evidence for massively convergent gene loss in nonphotosynthetic lineages. We designate this set of deleted or undetected genes Missing in Mycoheterotrophs (MIM). MIM genes encode not only mainly photosynthetic or plastid membrane proteins but also a diverse set of plastid processes, genes of unknown function, mitochondrial, and cellular processes. Transcription of a photosystem II gene (psb29) in all lineages implies a nonphotosynthetic function for this and other genes retained in mycoheterotrophs. Nonphotosynthetic plants enable novel insights into gene function as well as gene expression shifts, gene loss, and convergence in nuclear genomes.
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Affiliation(s)
- Prakash Raj Timilsena
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania
| | - Craig F Barrett
- Department of Biology, West Virginia University, Morgantown, West Virginia
| | - Alma Piñeyro-Nelson
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-Xochimilco, Mexico City, Mexico,Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Eric K Wafula
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania
| | | | - Joel R McNeal
- Department of Ecology, Evolution, and Organismal Biology, Kennesaw State University, Georgia
| | - Tomohisa Yukawa
- Tsukuba Botanical Garden, National Museum of Nature and Science, 1-1, Amakubo 4, Tsukuba, 305-0005, Japan
| | - Thomas J Givnish
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin
| | - Sean W Graham
- Department of Botany, University of British Columbia, Vancouver, British Columbia, V6T 1Z4Canada
| | - J Chris Pires
- Division of Biological Sciences, University of Missouri–Columbia, Columbia, Missouri
| | - Jerrold I Davis
- School of Integrative Plant Sciences and L.H. Bailey Hortorium, Cornell University, Ithaca, New York, 1485
| | - Cécile Ané
- Department of Botany, University of Wisconsin-Madison, Madison, Wisconsin,Department of Statistics, University of Wisconsin–Madison, Madison, Wisconsin
| | | | - Jim Leebens-Mack
- Department of Plant Biology, University of Georgia, Athens, Georgia, 3060
| | - Esteban Martínez-Salas
- Departmento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City, México
| | - Elena R Álvarez-Buylla
- Departamento de Ecología Funcional, Instituto de Ecología, Universidad Nacional Autónoma de México, Mexico City, Mexico,Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Mexico City, Mexico
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10
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Rathore N, Kumar P, Mehta N, Swarnkar MK, Shankar R, Chawla A. Time-series RNA-Seq transcriptome profiling reveals novel insights about cold acclimation and de-acclimation processes in an evergreen shrub of high altitude. Sci Rep 2022; 12:15553. [PMID: 36114408 PMCID: PMC9481616 DOI: 10.1038/s41598-022-19834-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/05/2022] [Indexed: 11/09/2022] Open
Abstract
The high-altitude alpine regions are characterized by highly variable and harsh environmental conditions. However, relatively little is known about the diverse mechanisms adopted by alpine plants to adapt to these stressful conditions. Here, we studied variation in transcriptome and physiological adjustments occurring across the year at high elevation environments in the leaf tissue of Rhododendron anthopogon, an evergreen shrub of Himalaya. The samples were collected at 12 different time-points, from August until snowfall in November 2017, and then from June to September 2018. It was observed that with a drop in both ambient air temperature and photoperiod towards onset of winter, the freezing resistance of plants increased, resulting in 'cold acclimation'. Further, 'de-acclimation' was associated with a decrease in freezing resistance and increase in photosynthetic efficiency of leaves during spring. A considerable amount of variation was observed in the transcriptome in a time-dependent sequential manner, with a total of 9,881 differentially expressed genes. Based on gene expression profiles, the time-points could be segregated into four clusters directly correlating with the distinct phases of acclimation: non-acclimation (22-August-2017, 14-August-2018, 31-August-2018), early cold acclimation (12-September-2017, 29-September-2017), late cold acclimation (11-October-2017, 23-October-2017, 04-November-2017, 18-September-2018) and de-acclimation (15-June-2018, 28-June-2018, 14-July-2018). Cold acclimation was a gradual process, as indicated by presence of an intermediate stage (early acclimation). However, the plants can by-pass this stage when sudden decrease in temperature is encountered. The maximum variation in expression levels of genes occurred during the transition to de-acclimation, hence was 'transcriptionally' the most active phase. The similar or higher expression levels of genes during de-acclimation in comparison to non-acclimation suggested that molecular functionality is re-initiated after passing through the harsh winter conditions.
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Affiliation(s)
- Nikita Rathore
- Environmental Technology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, H.P, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Prakash Kumar
- Biotechnology Division, CSIR-IHBT, Palampur, H.P, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.,Studio of Computational Biology and Bioinformatics, The Himalayan Centre for High-Throughput Computational Biology (HiCHiCoB, A BIC of Department of Biotechnology, Govt. of India), CSIR-IHBT, Palampur, H.P, India
| | - Nandita Mehta
- Environmental Technology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, H.P, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | | | - Ravi Shankar
- Biotechnology Division, CSIR-IHBT, Palampur, H.P, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. .,Studio of Computational Biology and Bioinformatics, The Himalayan Centre for High-Throughput Computational Biology (HiCHiCoB, A BIC of Department of Biotechnology, Govt. of India), CSIR-IHBT, Palampur, H.P, India.
| | - Amit Chawla
- Environmental Technology Division, CSIR-Institute of Himalayan Bioresource Technology (CSIR-IHBT), Palampur, H.P, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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11
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Imaizumi K, Ifuku K. Binding and functions of the two chloride ions in the oxygen-evolving center of photosystem II. PHOTOSYNTHESIS RESEARCH 2022; 153:135-156. [PMID: 35698013 DOI: 10.1007/s11120-022-00921-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Light-driven water oxidation in photosynthesis occurs at the oxygen-evolving center (OEC) of photosystem II (PSII). Chloride ions (Cl-) are essential for oxygen evolution by PSII, and two Cl- ions have been found to specifically bind near the Mn4CaO5 cluster in the OEC. The retention of these Cl- ions within the OEC is critically supported by some of the membrane-extrinsic subunits of PSII. The functions of these two Cl- ions and the mechanisms of their retention both remain to be fully elucidated. However, intensive studies performed recently have advanced our understanding of the functions of these Cl- ions, and PSII structures from various species have been reported, aiding the interpretation of previous findings regarding Cl- retention by extrinsic subunits. In this review, we summarize the findings to date on the roles of the two Cl- ions bound within the OEC. Additionally, together with a short summary of the functions of PSII membrane-extrinsic subunits, we discuss the mechanisms of Cl- retention by these extrinsic subunits.
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Affiliation(s)
- Ko Imaizumi
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan
| | - Kentaro Ifuku
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan.
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12
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Imaizumi K, Nishimura T, Nagao R, Saito K, Nakano T, Ishikita H, Noguchi T, Ifuku K. D139N mutation of PsbP enhances the oxygen-evolving activity of photosystem II through stabilized binding of a chloride ion. PNAS NEXUS 2022; 1:pgac136. [PMID: 36741451 PMCID: PMC9896922 DOI: 10.1093/pnasnexus/pgac136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 07/19/2022] [Indexed: 02/07/2023]
Abstract
Photosystem II (PSII) is a multisubunit membrane protein complex that catalyzes light-driven oxidation of water to molecular oxygen. The chloride ion (Cl-) has long been known as an essential cofactor for oxygen evolution by PSII, and two Cl- ions (Cl-1 and Cl-2) have been found to specifically bind near the Mn4CaO5 cluster within the oxygen-evolving center (OEC). However, despite intensive studies on these Cl- ions, little is known about the function of Cl-2, the Cl- ion that is associated with the backbone nitrogens of D1-Asn338, D1-Phe339, and CP43-Glu354. In green plant PSII, the membrane extrinsic subunits-PsbP and PsbQ-are responsible for Cl- retention within the OEC. The Loop 4 region of PsbP, consisting of highly conserved residues Thr135-Gly142, is inserted close to Cl-2, but its importance has not been examined to date. Here, we investigated the importance of PsbP-Loop 4 using spinach PSII membranes reconstituted with spinach PsbP proteins harboring mutations in this region. Mutations in PsbP-Loop 4 had remarkable effects on the rate of oxygen evolution by PSII. Moreover, we found that a specific mutation, PsbP-D139N, significantly enhances the oxygen-evolving activity in the absence of PsbQ, but not significantly in its presence. The D139N mutation increased the Cl- retention ability of PsbP and induced a unique structural change in the OEC, as indicated by light-induced Fourier transform infrared (FTIR) difference spectroscopy and theoretical calculations. Our findings provide insight into the functional significance of Cl-2 in the water-oxidizing reaction of PSII.
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Affiliation(s)
- Ko Imaizumi
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Taishi Nishimura
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Ryo Nagao
- Division of Material Science, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan,Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - Keisuke Saito
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan,Department of Applied Chemistry, The University of Tokyo, Tokyo 113-8654 , Japan
| | - Takeshi Nakano
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Hiroshi Ishikita
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo 153-8904, Japan,Department of Applied Chemistry, The University of Tokyo, Tokyo 113-8654 , Japan
| | - Takumi Noguchi
- Division of Material Science, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
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13
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Macromolecular conformational changes in photosystem II: interaction between structure and function. Biophys Rev 2022; 14:871-886. [DOI: 10.1007/s12551-022-00979-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/02/2022] [Indexed: 01/08/2023] Open
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14
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Cui F, Ye X, Li X, Yang Y, Hu Z, Overmyer K, Brosché M, Yu H, Salojärvi J. Chromosome-level genome assembly of the diploid blueberry Vaccinium darrowii provides insights into its subtropical adaptation and cuticle synthesis. PLANT COMMUNICATIONS 2022; 3:100307. [PMID: 35605198 PMCID: PMC9284290 DOI: 10.1016/j.xplc.2022.100307] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 02/09/2022] [Accepted: 02/24/2022] [Indexed: 05/25/2023]
Abstract
Vaccinium darrowii is a subtropical wild blueberry species that has been used to breed economically important southern highbush cultivars. The adaptive traits of V. darrowii to subtropical climates can provide valuable information for breeding blueberry and perhaps other plants, especially against the background of global warming. Here, we assembled the V. darrowii genome into 12 pseudochromosomes using Oxford Nanopore long reads complemented with Hi-C scaffolding technologies, and we predicted 41 815 genes using RNA-sequencing evidence. Syntenic analysis across three Vaccinium species revealed a highly conserved genome structure, with the highest collinearity between V. darrowii and Vaccinium corymbosum. This conserved genome structure may explain the high fertility observed during crossbreeding of V. darrowii with other blueberry cultivars. Analysis of gene expansion and tandem duplication indicated possible roles for defense- and flowering-associated genes in the adaptation of V. darrowii to the subtropics. Putative SOC1 genes in V. darrowii were identified based on phylogeny and expression analysis. Blueberries are covered in a thick cuticle layer and contain anthocyanins, which confer their powdery blue color. Using RNA sequencing, we delineated the cuticle biosynthesis pathways of Vaccinium species in V. darrowii. This result can serve as a reference for breeding berries whose colors are appealing to customers. The V. darrowii reference genome, together with the unique traits of this species, including its diploid genome, short vegetative phase, and high compatibility in hybridization with other blueberries, make V. darrowii a potential research model for blueberry species.
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Affiliation(s)
- Fuqiang Cui
- College of Forestry and Biotechnology, State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou 311300, China.
| | - Xiaoxue Ye
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Xiaoxiao Li
- College of Forestry and Biotechnology, State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou 311300, China
| | - Yifan Yang
- College of Forestry and Biotechnology, State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou 311300, China
| | - Zhubing Hu
- State Key Laboratory of Cotton Biology, Department of Biology, Institute of Plant Stress Biology, Henan University, Kaifeng, China
| | - Kirk Overmyer
- Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and the Viikki Plant Science Centre, University of Helsinki, PO Box 65 (Viikinkaari 1), 00014 Helsinki, Finland
| | - Mikael Brosché
- Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and the Viikki Plant Science Centre, University of Helsinki, PO Box 65 (Viikinkaari 1), 00014 Helsinki, Finland
| | - Hong Yu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Jarkko Salojärvi
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore; Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and the Viikki Plant Science Centre, University of Helsinki, PO Box 65 (Viikinkaari 1), 00014 Helsinki, Finland.
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15
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Yocum CF. Photosystem 2 and the oxygen evolving complex: a brief overview. PHOTOSYNTHESIS RESEARCH 2022; 152:97-105. [PMID: 35294671 DOI: 10.1007/s11120-022-00910-1] [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: 11/24/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
These special issues of photosynthesis research present papers documenting progress in revealing the many aspects of photosystem 2, a unique, one-of-a-kind complex system that can reduce a plastoquinone to a plastoquinol on every second flash of light and oxidize 2 H2O to an O2 on every fourth flash. This overview is a brief personal assessment of the progress observed by the author over a four-decade research career, including a discussion of some remaining unsolved issues. It will come as no surprise to readers that there are remaining questions given the complexity of PS2, and the efforts that have been needed so far to uncover its secrets. In fact, most readers will have their own lists of outstanding questions.
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Affiliation(s)
- Charles F Yocum
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
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16
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Liu B, Zhao FM, Cao Y, Wang XY, Li Z, Shentu Y, Zhou H, Xia YP. Photoprotection contributes to freezing tolerance as revealed by RNA-seq profiling of rhododendron leaves during cold acclimation and deacclimation over time. HORTICULTURE RESEARCH 2022; 9:uhab025. [PMID: 35039836 PMCID: PMC8801717 DOI: 10.1093/hr/uhab025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 01/18/2022] [Accepted: 10/14/2021] [Indexed: 06/14/2023]
Abstract
Cold acclimation (CA) and deacclimation (DA), which are often accompanied by changes in freezing tolerance (FT), carbohydrates and hormones, are crucial for winter survival, especially under global warming. Plants with weak CA and premature DA caused by warm winters and/or unseasonal warm spells can be easily injured by adverse reactions to cold. Thus, understanding the molecular mechanisms of FT is imperative. In this study, we used high-throughput RNA-seq to profile the CA and DA of leaves of overwintering Rhododendron "Miyo-no-Sakae" over time; these leaves do not undergo dormancy but do undergo photoprotection during CA, and they do not grow during DA. Using Mfuzz and weighted gene coexpression network analysis, we identified specific transcriptional characteristics in each phase of CA and DA and proposed networks involving coexpressed genes and physiological traits. In particular, we discovered that the circadian rhythm is critical for obtaining the strongest FT, and high expression of circadian rhythm-related genes might be linked to sugar accumulation during winter. Furthermore, evergreen leaves exhibited robust photoprotection during winter, as revealed by high values of nonphotochemical quenching, high expression of transcripts annotated as "early light-induced proteins", loss of granum stacks and destacking of thylakoids, all of which were alleviated during DA. The strong requirement of photoprotection could be the reason for decreased abscisic acid (ABA) and jasmonic acid (JA) contents during CA, and decreases in ABA and JA contents may contribute to decreases in lignin content. Our data suggest that the molecular mechanisms of FT in overwintering leaves are unique, which may be due to the high requirements for photoprotection during winter.
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Affiliation(s)
- Bing Liu
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Fang-Meng Zhao
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Yan Cao
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Xiu-Yun Wang
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Zheng Li
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Yuanyue Shentu
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Hong Zhou
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Yi-Ping Xia
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
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17
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Guo C, Li J, Li M, Xu X, Chen Y, Chu J, Yao X. Regulation Mechanism of Exogenous Brassinolide on Bulbil Formation and Development in Pinellia ternata. FRONTIERS IN PLANT SCIENCE 2022; 12:809769. [PMID: 35069668 PMCID: PMC8766408 DOI: 10.3389/fpls.2021.809769] [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: 11/05/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
The bulbil is the propagative organ of the P. ternata, which has a great effect on the yield of P. ternata. It is well known that plant hormones play important roles in bulbil formation and development. However, there is not clear about brassinolide (BR) regulation on bulbil formation and development. In this study, we revealed the effects of BR and BR biosynthesis inhibitors (propiconazole, Pcz) application on the histological observation, starch and sucrose metabolism, photosynthesis pathway, and hormone signaling pathway of P. ternata. The results showed that BR treatment reduced starch catabolism to maltodextrin and maltose in bulbil by decreasing BAM and ISA genes expression and increased cellulose catabolism to D-glucose in bulbil by enhancing edg and BGL genes expression. BR treatment enhanced the photosynthetic pigment content and potential maximum photosynthetic capacity and improved the photoprotection ability of P. ternata by increasing the dissipation of excess light energy to heat, thus reduced the photodamage in the PSII center. BR treatment increased the GA and BR content in bulbil of P. ternata, and decreased the ABA content in bulbil of P. ternata. Pcz treatment increased the level of GA, SL, ABA, and IAA in bulbil of P. ternata. BR regulated the signal transduction of BR, IAA, and ABA to regulate the formation and development of bulbil in P. ternata. These results provide molecular insight into BR regulation on bulbil formation and development.
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Affiliation(s)
- Chenchen Guo
- College of Life Sciences, Hebei University, Baoding, China
| | - Jigang Li
- College of Life Sciences, Hebei University, Baoding, China
- Institute of Life Sciences and Green Development, Hebei University, Baoding, China
| | - Minghui Li
- College of Life Sciences, Hebei University, Baoding, China
| | - Xihang Xu
- College of Life Sciences, Hebei University, Baoding, China
| | - Ying Chen
- College of Life Sciences, Hebei University, Baoding, China
| | - Jianzhou Chu
- College of Life Sciences, Hebei University, Baoding, China
- Institute of Life Sciences and Green Development, Hebei University, Baoding, China
| | - Xiaoqin Yao
- College of Life Sciences, Hebei University, Baoding, China
- Institute of Life Sciences and Green Development, Hebei University, Baoding, China
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18
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Zhao X, Huang LJ, Sun XF, Zhao LL, Wang PC. Differential Physiological, Transcriptomic, and Metabolomic Responses of Paspalum wettsteinii Under High-Temperature Stress. FRONTIERS IN PLANT SCIENCE 2022; 13:865608. [PMID: 35528933 PMCID: PMC9069066 DOI: 10.3389/fpls.2022.865608] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 04/04/2022] [Indexed: 05/08/2023]
Abstract
Global warming has far-reaching effects on plant growth and development. As a warm-season forage grass, Paspalum wettsteinii is highly adaptable to high temperatures. However, the response mechanism of P. wettsteinii under high-temperature stress is still unclear. Therefore, we investigated the physiological indicators, transcriptome and metabolome of P. wettsteinii under different heat stress treatments. Plant height, the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and the contents of soluble sugar, proline, chlorophyll a, and chlorophyll b increased and then decreased, while the malondialdehyde (MDA) content decreased and then increased with increasing heat stress. Transcriptomic analysis revealed that genes related to energy and carbohydrate metabolism, heat shock proteins (HSPs), and transcription factors (TFs), secondary metabolite biosynthesis and the antioxidant system significantly changed to varying degrees. Metabolomic analysis showed that only free fatty acids were downregulated, while amino acids and their derivatives, organic acids, flavonoids, and sugars were both up- and downregulated under heat stress. These combined analyses revealed that growth was promoted at 25-40°C, while at 45°C, excess reactive oxygen species (ROS) damage reduced antioxidant and osmoregulatory effects and inactivated genes associated with the light and electron transport chains (ETCs), as well as damaged the PS II system and inhibited photosynthesis. A small number of genes and metabolites were upregulated to maintain the basic growth of P. wettsteinii. The physiological and biochemical changes in response to high-temperature stress were revealed, and the important metabolites and key genes involved in the response to high temperature were identified, providing an important reference for the physiological and molecular regulation of high-temperature stress in plants.
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Affiliation(s)
- Xin Zhao
- College of Animal Science, Guizhou University, Guiyang, China
| | - Li-Juan Huang
- College of Animal Science, Guizhou University, Guiyang, China
| | - Xiao-Fu Sun
- College of Animal Science, Guizhou University, Guiyang, China
| | - Li-Li Zhao
- College of Animal Science, Guizhou University, Guiyang, China
- *Correspondence: Li-Li Zhao,
| | - Pu-Chang Wang
- School of Life Sciences, Guizhou Normal University, Guiyang, China
- Pu-Chang Wang,
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19
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Harith-Fadzilah N, Lam SD, Haris-Hussain M, Ghani IA, Zainal Z, Jalinas J, Hassan M. Proteomics and Interspecies Interaction Analysis Revealed Abscisic Acid Signalling to Be the Primary Driver for Oil Palm's Response against Red Palm Weevil Infestation. PLANTS (BASEL, SWITZERLAND) 2021; 10:2574. [PMID: 34961045 PMCID: PMC8709180 DOI: 10.3390/plants10122574] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/29/2021] [Accepted: 11/10/2021] [Indexed: 06/14/2023]
Abstract
The red palm weevil (RPW; Rhynchophorus ferrugineus Olivier (Coleoptera Curculionidae)) is an invasive insect pest that is difficult to manage due to its nature of infesting the host palm trees from within. A holistic, molecular-based approach to identify proteins that correlate with RPW infestation could give useful insights into the vital processes that are prevalent to the host's infestation response and identify the potential biomarkers for an early detection technique. Here, a shotgun proteomic analysis was performed on oil palm (Elaeis guineensis; OP) under untreated (control), wounding by drilling (wounded), and artificial larval infestation (infested) conditions at three different time points to characterise the RPW infestation response at three different stages. KEGG pathway enrichment analysis revealed many overlapping pathways between the control, wounded, and infested groups. Further analysis via literature searches narrowed down biologically relevant proteins into categories, which were photosynthesis, growth, and stress response. Overall, the patterns of protein expression suggested abscisic acid (ABA) hormone signalling to be the primary driver of insect herbivory response. Interspecies molecular docking analysis between RPW ligands and OP receptor proteins provided putative interactions that result in ABA signalling activation. Seven proteins were selected as candidate biomarkers for early infestation detection based on their relevance and association with ABA signalling. The MS data are available via ProteomeXchange with identifier PXD028986. This study provided a deeper insight into the mechanism of stress response in OP in order to develop a novel detection method or improve crop management.
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Affiliation(s)
- Nazmi Harith-Fadzilah
- Institute of Systems Biology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (N.H.-F.); (Z.Z.)
| | - Su Datt Lam
- Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;
- Institute of Structural and Molecular Biology, University College London, London WC1E 6BT, UK
| | - Mohammad Haris-Hussain
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (M.H.-H.); (I.A.G.); (J.J.)
| | - Idris Abd Ghani
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (M.H.-H.); (I.A.G.); (J.J.)
| | - Zamri Zainal
- Institute of Systems Biology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (N.H.-F.); (Z.Z.)
| | - Johari Jalinas
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (M.H.-H.); (I.A.G.); (J.J.)
| | - Maizom Hassan
- Institute of Systems Biology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (N.H.-F.); (Z.Z.)
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20
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Meng X, Wang X, Zhang Z, Xiong S, Wei Y, Guo J, Zhang J, Wang L, Ma X, Tegeder M. Transcriptomic, proteomic, and physiological studies reveal key players in wheat nitrogen use efficiency under both high and low nitrogen supply. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:4435-4456. [PMID: 33829261 DOI: 10.1093/jxb/erab153] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
The effective use of available nitrogen (N) to improve crop grain yields provides an important strategy to reduce environmental N pollution and promote sustainable agriculture. However, little is known about the common genetic basis of N use efficiency (NUE) at varying N availability. Two wheat (Triticum aestivum L.) cultivars were grown in the field with high, moderate, and low N supply. Cultivar Zhoumai 27 outperformed Aikang 58 independent of the N supply and showed improved growth, canopy leaf area index, flag leaf surface area, grain number, and yield, and enhanced NUE due to both higher N uptake and utilization efficiency. Further, transcriptome and proteome analyses were performed using flag leaves that provide assimilates for grain growth. The results showed that many genes or proteins that are up- or down-regulated under all N regimes are associated with N and carbon metabolism and transport. This was reinforced by cultivar differences in photosynthesis, assimilate phloem transport, and grain protein/starch yield. Overall, our study establishes that improving NUE at both high and low N supply requires distinct adjustments in leaf metabolism and assimilate partitioning. Identified key genes/proteins may individually or concurrently regulate NUE and are promising targets for maximizing crop NUE irrespective of the N supply.
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Affiliation(s)
- Xiaodan Meng
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, ZhengzhouChina
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
- School of Biological Sciences, Washington State University, Pullman, WAUSA
| | - Xiaochun Wang
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, ZhengzhouChina
| | - Zhiyong Zhang
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, ZhengzhouChina
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Shuping Xiong
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, ZhengzhouChina
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Yihao Wei
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, ZhengzhouChina
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Jianbiao Guo
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Jie Zhang
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Lulu Wang
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Xinming Ma
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, ZhengzhouChina
- College of Agronomy, Henan Agricultural University, ZhengzhouChina
| | - Mechthild Tegeder
- School of Biological Sciences, Washington State University, Pullman, WAUSA
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21
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Semedo JN, Rodrigues AP, Lidon FC, Pais IP, Marques I, Gouveia D, Armengaud J, Silva MJ, Martins S, Semedo MC, Dubberstein D, Partelli FL, Reboredo FH, Scotti-Campos P, Ribeiro-Barros AI, DaMatta FM, Ramalho JC. Intrinsic non-stomatal resilience to drought of the photosynthetic apparatus in Coffea spp. is strengthened by elevated air [CO2]. TREE PHYSIOLOGY 2021; 41:708-727. [PMID: 33215189 DOI: 10.1093/treephys/tpaa158] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/11/2020] [Indexed: 05/10/2023]
Abstract
Growing water restrictions associated with climate changes constitute daunting challenges to crop performance. This study unveils the impacts of moderate (MWD) or severe (SWD) water deficit, and their interaction with air [CO2], on the photosynthetic apparatus of Coffea canephora Pierre ex A. Froehner cv. Conilon Clone 153 (CL153) and Coffea arabica L. cv. Icatu. Seven year-old potted plants grown under 380 (aCO2) or 700 μl l -1 (eCO2) [CO2] gradually reached predawn water potentials between -1.6 and -2.1 MPa (MWD), and below -3.5 MPa (SWD). Under drought, stomata closure was chiefly related to abscisic acid (ABA) rise. Increasing drought severity progressively affected gas exchange and fluorescence parameters in both genotypes, with non-stomatal limitations becoming gradually dominating, especially regarding the photochemical and biochemical components of CL153 SWD plants. In contrast, Icatu plants were highly tolerant to SWD, with minor, if any, negative impacts on the potential photosynthetic functioning and components (e.g., Amax, Fv/Fm, electron carriers, photosystems (PSs) and ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO) activities). Besides, drought-stressed Icatu plants displayed increased abundance of a large set of proteins associated with the photosynthetic apparatus (PSs, light-harvesting complexes, cyclic electron flow, RuBisCO activase) regardless of [CO2]. Single eCO2 did not promote stomatal and photosynthetic down-regulation in both genotypes. Instead, eCO2 increased photosynthetic performance, moderately reinforced photochemical (PSs activity, electron carriers) and biochemical (RuBisCO, ribulose-5-phosphate kinase) components, whereas photoprotective mechanisms and protein abundance remained mostly unaffected. In both genotypes, under MWD, eCO2 superimposition delayed stress severity and promoted photosynthetic functioning with lower energy dissipation and PSII impacts, whereas stomatal closure was decoupled from increases in ABA. In SWD plants, most impacts on the photosynthetic performance were reduced by eCO2, especially in the moderately drought affected CL153 genotype, although maintaining RuBisCO as the most sensitive component, deserving special breeder's attention to improve coffee sustainability under future climate scenarios.
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Affiliation(s)
- José N Semedo
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Qta. Marquês, Av. República, Oeiras 2784-505, Portugal
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
| | - Ana P Rodrigues
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, Oeiras 2784-505, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Tapada da Ajuda, Lisboa 1349-017, Portugal
| | - Fernando C Lidon
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
| | - Isabel P Pais
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Qta. Marquês, Av. República, Oeiras 2784-505, Portugal
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
| | - Isabel Marques
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, Oeiras 2784-505, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Tapada da Ajuda, Lisboa 1349-017, Portugal
| | - Duarte Gouveia
- CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Université Paris Saclay, Bagnols-sur-Cèze F-F-30200, France
| | - Jean Armengaud
- CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Université Paris Saclay, Bagnols-sur-Cèze F-F-30200, France
| | - Maria J Silva
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, Oeiras 2784-505, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Tapada da Ajuda, Lisboa 1349-017, Portugal
| | - Sónia Martins
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
- Área Departamental de Engenharia Química, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro 1, Lisboa 1959-007, Portugal
| | - Magda C Semedo
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
- Área Departamental de Engenharia Química, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro 1, Lisboa 1959-007, Portugal
| | - Danielly Dubberstein
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, Oeiras 2784-505, Portugal
- Departamento de Ciências Agrárias e Biológicas (DCAB), Centro Universitário do Norte do Espírito Santo (CEUNES), Universidade Federal Espírito Santo (UFES), Rod. BR 101 Norte, Km. 60, Bairro Litorâneo, São Mateu-ES, CEP 29932-540, Brazil
| | - Fábio L Partelli
- Departamento de Ciências Agrárias e Biológicas (DCAB), Centro Universitário do Norte do Espírito Santo (CEUNES), Universidade Federal Espírito Santo (UFES), Rod. BR 101 Norte, Km. 60, Bairro Litorâneo, São Mateu-ES, CEP 29932-540, Brazil
| | - Fernando H Reboredo
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
| | - Paula Scotti-Campos
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Qta. Marquês, Av. República, Oeiras 2784-505, Portugal
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
| | - Ana I Ribeiro-Barros
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, Oeiras 2784-505, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Tapada da Ajuda, Lisboa 1349-017, Portugal
| | - Fábio M DaMatta
- Departamento de Biologia Vegetal, Universidade Federal Viçosa, Viçosa, MG 36570-900, Brazil
| | - José C Ramalho
- Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Monte de Caparica, Caparica 2829-516, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, Oeiras 2784-505, Portugal
- Plant Stress and Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa (ULisboa), Tapada da Ajuda, Lisboa 1349-017, Portugal
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22
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Pan Z, Bajsa‐Hirschel J, Vaughn JN, Rimando AM, Baerson SR, Duke SO. In vivo assembly of the sorgoleone biosynthetic pathway and its impact on agroinfiltrated leaves of Nicotiana benthamiana. THE NEW PHYTOLOGIST 2021; 230:683-697. [PMID: 33460457 PMCID: PMC8048663 DOI: 10.1111/nph.17213] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/17/2020] [Indexed: 06/12/2023]
Abstract
Sorgoleone, a hydrophobic compound exuded from root hair cells of Sorghum spp., accounts for much of the allelopathic activity of the genus. The enzymes involved in the biosynthesis of this compound have been identified and functionally characterized. Here, we report the successful assembly of the biosynthetic pathway and the significant impact of in vivo synthesized sorgoleone on the heterologous host Nicotiana benthamiana. A multigene DNA construct was prepared for the expression of genes required for sorgoleone biosynthesis in planta and deployed in N. benthamiana leaf tissues via Agrobacterium-mediated transient expression. RNA-sequencing was conducted to investigate the effects of sorgoleone, via expression of its biosynthesis pathway, on host gene expression. The production of sorgoleone in agroinfiltrated leaves as detected by gas chromatography/mass spectrometry (GC/MS) resulted in the formation of necrotic lesions, indicating that the compound caused severe phytotoxicity to these tissues. RNA-sequencing profiling revealed significant changes in gene expression in the leaf tissues expressing the pathway during the formation of sorgoleone-induced necrotic lesions. Transcriptome analysis suggested that the compound produced in vivo impaired the photosynthetic system as a result of downregulated gene expression for the photosynthesis apparatus and elevated expression of proteasomal genes which may play a major role in the phytotoxicity of sorgoleone.
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Affiliation(s)
- Zhiqiang Pan
- Natural Products Utilization Research UnitUS Department of Agriculture, Agricultural Research ServiceUniversityMS38677USA
| | - Joanna Bajsa‐Hirschel
- Natural Products Utilization Research UnitUS Department of Agriculture, Agricultural Research ServiceUniversityMS38677USA
| | - Justin N. Vaughn
- Genomics and Bioinformatics Research UnitUSDA, ARSAthensGA30605USA
| | - Agnes M. Rimando
- Natural Products Utilization Research UnitUS Department of Agriculture, Agricultural Research ServiceUniversityMS38677USA
| | - Scott R. Baerson
- Natural Products Utilization Research UnitUS Department of Agriculture, Agricultural Research ServiceUniversityMS38677USA
| | - Stephen O. Duke
- Natural Products Utilization Research UnitUS Department of Agriculture, Agricultural Research ServiceUniversityMS38677USA
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23
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Plewiński P, Ćwiek-Kupczyńska H, Rudy E, Bielski W, Rychel-Bielska S, Stawiński S, Barzyk P, Krajewski P, Naganowska B, Wolko B, Książkiewicz M. Innovative transcriptome-based genotyping highlights environmentally responsive genes for phenology, growth and yield in a non-model grain legume. PLANT, CELL & ENVIRONMENT 2020; 43:2680-2698. [PMID: 32885839 DOI: 10.1111/pce.13880] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 08/21/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
The narrow-leafed lupin, Lupinus angustifolius L., is a grain legume crop, cultivated both as a green manure and as a source of protein for animal feed and human food production. During its domestication process, numerous agronomic traits were improved, however, only two trait-related genes were identified hitherto, both by linkage mapping. Genome-wide association studies (GWAS), exploiting genomic sequencing, did not select any novel candidate gene. In the present study, an innovative method of 3'-end reduced representation transcriptomic profiling, a massive analysis of cDNA ends, has been used for genotyping of 126 L. angustifolius lines surveyed by field phenotyping. Significant genotype × environment interactions were identified for all phenology and yield traits analysed. Principal component analysis of population structure evidenced European domestication bottlenecks, visualized by clustering of breeding materials and cultivars. GWAS provided contribution towards deciphering vernalization pathway in legumes, and, apart from highlighting known domestication loci (Ku/Julius and mol), designated novel candidate genes for L. angustifolius traits. Early phenology was associated with genes from vernalization, cold-responsiveness and phosphatidylinositol signalling pathways whereas high yield with genes controlling photosynthesis performance and abiotic stress (drought or heat) tolerance. PCR-based toolbox was developed and validated to enable tracking desired alleles in marker-assisted selection. Narrow-leafed lupin was genotyped with an innovative method of transcriptome profiling and phenotyped for phenology, growth and yield traits in field. Early phenology was found associated with genes from cold-response, vernalization and phosphatidylinositol signalling pathways, whereas high yield with genes running photosystem II and drought or heat stress response. Key loci were supplied with PCR-based toolbox for marker-assisted selection.
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Affiliation(s)
- Piotr Plewiński
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Hanna Ćwiek-Kupczyńska
- Department of Biometry and Bioinformatics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Elżbieta Rudy
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Wojciech Bielski
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Sandra Rychel-Bielska
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
- Department of Genetics, Plant Breeding and Seed Production, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Stanisław Stawiński
- Department in Przebędowo, Plant Breeding Smolice Ltd., Murowana Goślina, Poland
| | - Paweł Barzyk
- Department in Wiatrowo, Poznań Plant Breeding Ltd., Wiatrowo, Poland
| | - Paweł Krajewski
- Department of Biometry and Bioinformatics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Barbara Naganowska
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Bogdan Wolko
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
| | - Michał Książkiewicz
- Department of Genomics, Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
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Tan Y, Zhang QS, Zhao W, Liu Z, Ma MY, Zhong MY, Wang MX, Xu B. Chlororespiration Serves as Photoprotection for the Photo-Inactivated Oxygen-Evolving Complex in Zostera marina, a Marine Angiosperm. PLANT & CELL PHYSIOLOGY 2020; 61:1517-1529. [PMID: 32492141 DOI: 10.1093/pcp/pcaa075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 05/28/2020] [Indexed: 06/11/2023]
Abstract
As an alternative electron sink, chlororespiration, comprising the NAD(P)H dehydrogenase complex and plastid terminal plastoquinone oxidase, may play a significant role in sustaining the redox equilibrium between stroma and thylakoid membrane. This study identified a distinct role for chlororespiration in the marine angiosperm Zostera marina, whose oxygen-evolving complex (OEC) is prone to photo-inactivation as a result of its inherent susceptibility to excess irradiation. The strong connectivity between OEC peripheral proteins and key chlororespiratory enzymes, as demonstrated in the interaction network of differentially expressed genes, suggested that the recovery of photo-inactivated OEC was connected with chlororespiration. Chlorophyll fluorescence, transcriptome and Western blot data verified a new physiological role for chlororespiration to function as photoprotection and generate a proton gradient across the thylakoid membrane for the recovery of photo-inactivated OEC. Chlororespiration was only activated in darkness following excess irradiation exposure, which might be related to electron deficiency in the electron transport chain because of the continuous impairment of the OEC. The activation of chlororespiration in Z. marina was prone to proactivity, which was also supported by the further activation of the oxidative pentose-phosphate pathway synthesizing NADPH to meet the demand of chlororespiration during darkness. This phenomenon is distinct from the common assumption that chlororespiration is prone to consuming redundant reducing power during the short transition phase from light to dark.
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Affiliation(s)
- Ying Tan
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Quan Sheng Zhang
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Wei Zhao
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Zhe Liu
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Ming Yu Ma
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Ming Yu Zhong
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Meng Xin Wang
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
| | - Bin Xu
- Phycology Laboratory, Ocean School, Yantai University, Yantai 264005, PR China
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25
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Che Y, Kusama S, Matsui S, Suorsa M, Nakano T, Aro EM, Ifuku K. Arabidopsis PsbP-Like Protein 1 Facilitates the Assembly of the Photosystem II Supercomplexes and Optimizes Plant Fitness under Fluctuating Light. PLANT & CELL PHYSIOLOGY 2020; 61:1168-1180. [PMID: 32277833 DOI: 10.1093/pcp/pcaa045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 04/11/2020] [Indexed: 06/11/2023]
Abstract
In green plants, photosystem II (PSII) forms multisubunit supercomplexes (SCs) containing a dimeric core and light-harvesting complexes (LHCs). In this study, we show that Arabidopsis thaliana PsbP-like protein 1 (PPL1) is involved in the assembly of the PSII SCs and is required for adaptation to changing light intensity. PPL1 is a homolog of PsbP protein that optimizes the water-oxidizing reaction of PSII in green plants and is required for the efficient repair of photodamaged PSII; however, its exact function has been unknown. PPL1 was enriched in stroma lamellae and grana margins and associated with PSII subcomplexes including PSII monomers and PSII dimers, and several LHCII assemblies, while PPL1 was not detected in PSII-LHCII SCs. In a PPL1 null mutant (ppl1-2), assembly of CP43, PsbR and PsbW was affected, resulting in a reduced accumulation of PSII SCs even under moderate light intensity. This caused the abnormal association of LHCII in ppl1-2, as indicated by lower maximal quantum efficiency of PSII (Fv/Fm) and accelerated State 1 to State 2 transitions. These differences would lower the capability of plants to adapt to changing light environments, thereby leading to reduced growth under natural fluctuating light environments. Phylogenetic and structural analyses suggest that PPL1 is closely related to its cyanobacterial homolog CyanoP, which functions as an assembly factor in the early stage of PSII biogenesis. Our results suggest that PPL1 has a similar function, but the data also indicate that it could aid the association of LHCII with PSII.
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Affiliation(s)
- Yufen Che
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shoko Kusama
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shintaro Matsui
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Marjaana Suorsa
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Takeshi Nakano
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Kentaro Ifuku
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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Hong Y, Wang Z, Liu X, Yao J, Kong X, Shi H, Zhu JK. Two Chloroplast Proteins Negatively Regulate Plant Drought Resistance Through Separate Pathways. PLANT PHYSIOLOGY 2020; 182:1007-1021. [PMID: 31776182 PMCID: PMC6997674 DOI: 10.1104/pp.19.01106] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/17/2019] [Indexed: 05/03/2023]
Abstract
Drought is one of the most deleterious environmental conditions affecting crop growth and productivity. Here we report the important roles of a nuclear-encoded chloroplast protein, PsbP Domain Protein 5 (PPD5), in drought resistance in Arabidopsis (Arabidopsis thaliana). From a forward genetic screen, a drought-resistant mutant named ppd5-2 was identified, which has a knockout mutation in PPD5 The ppd5 mutants showed increased H2O2 accumulation in guard cells and enhanced stomatal closure in response to drought stress. Further analysis revealed that the chloroplast-localized PPD5 protein interacts with and is phosphorylated by OST1, and phosphorylation of PPD5 increases its protein stability. Double mutant ppd5-2ost1-3 exhibited phenotypes resembling the ost1-3 single mutant with decreased stomatal closure, increased water loss, reduced H2O2 accumulation in guard cells, and hypersensitivity to drought stress. These results indicate that the chloroplast protein PPD5 negatively regulates drought resistance by modulating guard cell H2O2 accumulation via an OST1-dependent pathway. Interestingly, the thf1-1 mutant defective in the chloroplast protein THF1 displayed drought-resistance and H2O2 accumulation similar to the ppd5 mutants, but the thf1-1ost1-3 double mutant resembled the phenotypes of the thf1-1 single mutant. These results indicate that both OST1-dependent and OST1-independent pathways exist in the regulation of H2O2 production in chloroplasts of guard cells under drought stress conditions. Additionally, our findings suggest a strategy to improve plant drought resistance through manipulation of chloroplast proteins.
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Affiliation(s)
- Yechun Hong
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
- University of Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Zhen Wang
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Xue Liu
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Juanjuan Yao
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
- University of Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Xiangfeng Kong
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
- University of Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Huazhong Shi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47907
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27
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Li ZQ, Xing W, Luo P, Zhang FJ, Jin XL, Zhang MH. Comparative transcriptome analysis of Rosa chinensis 'Slater's crimson China' provides insights into the crucial factors and signaling pathways in heat stress response. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 142:312-331. [PMID: 31352248 DOI: 10.1016/j.plaphy.2019.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 06/30/2019] [Accepted: 07/01/2019] [Indexed: 06/10/2023]
Abstract
Heat stress limits the growth of roses and adversely affects the yield and the quality of the rose cut-flowers. To investigate the heat stress response (HSR) mechanisms of rose, we compared the transcriptome profiling generated from Rosa chinensis 'Slater's crimson China' exposed to heat stress for five different time duration (0, 0.5, 2, 6, 12 h). Overall, 6175 differentially expressed genes (DGEs) were identified and exhibited different temporal expression patterns. Up-regulated genes related to chaperone-mediated protein folding, signal transduction and ROS scavenging were rapidly induced after 0.5-2 h of heat treatment, which provides evidence for the early adjustments of heat stress response in R. chinensis. While the down-regulated genes related to light reaction, sucrose biosynthesis, starch biosynthesis and cell wall biosynthesis were identified after as short as 6 h of heat stress, which indicated the ongoing negative effects on the physiology of R. chinensis. Using weighted gene co-expression network analysis, we found that different heat stress stages could be delineated by several modules. Based on integrating the transcription factors with upstream enriched DNA motifs of co-expressed genes in these modules, the gene regulation networks were predicted and several regulators of HSR were identified. Of particular importance was the discovery of the module associated with rapid sensing and signal transduction, in which numerous co-expressed genes related to chaperones, Ca2+ signaling pathways and transcription factors were identified. The results of this study provided an important resource for further dissecting the role of candidate genes governing the transcriptional regulatory network of HSR in Rose.
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Affiliation(s)
- Ze Qing Li
- College of Landscape Architecture, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Wen Xing
- College of Landscape Architecture, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China.
| | - Ping Luo
- Zhejiang Agriculture and Forestry University, Hangzhou, 311300, Zhejiang, China
| | - Fang Jing Zhang
- College of Landscape Architecture, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Xiao Ling Jin
- College of Landscape Architecture, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Min Huan Zhang
- College of Landscape Architecture, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
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Photosystem II Extrinsic Proteins and Their Putative Role in Abiotic Stress Tolerance in Higher Plants. PLANTS 2018; 7:plants7040100. [PMID: 30441780 PMCID: PMC6313935 DOI: 10.3390/plants7040100] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 01/08/2023]
Abstract
Abiotic stress remains one of the major challenges in managing and preventing crop loss. Photosystem II (PSII), being the most susceptible component of the photosynthetic machinery, has been studied in great detail over many years. However, much of the emphasis has been placed on intrinsic proteins, particularly with respect to their involvement in the repair of PSII-associated damage. PSII extrinsic proteins include PsbO, PsbP, PsbQ, and PsbR in higher plants, and these are required for oxygen evolution under physiological conditions. Changes in extrinsic protein expression have been reported to either drastically change PSII efficiency or change the PSII repair system. This review discusses the functional role of these proteins in plants and indicates potential areas of further study concerning these proteins.
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Trotta A, Barera S, Marsano F, Osella D, Musso D, Pagliano C, Andreucci F, Barbato R. Isolation and characterization of a photosystem II preparation from thylakoid membranes of the extreme halophyte Salicornia veneta Pignatti et Lausi. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 132:356-362. [PMID: 30261469 DOI: 10.1016/j.plaphy.2018.09.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/17/2018] [Accepted: 09/17/2018] [Indexed: 06/08/2023]
Abstract
Salicornia veneta (Pignatti et Lausi) is an extreme halophyte living in salt marsh where NaCl concentration may be as high as 1 M. Here we report on the isolation and characterization of a PSII preparation obtained by Triton X-100 solubilisation of the thylakoid membrane. By a combination of gel electrophoresis, immunoblotting and mass spectrometry, the depletion of a number of PSII proteins such as PsbQ, PsbM and PsbT was highlighted. Moreover, the requirement of Cl- and Ca2+ for optimal oxygen evolution was determined, showing that in absence of PsbQ a higher level of these ions are required. At high Cl- concentrations, oxygen evolution was inhibited in the same way in Salicornia veneta and spinach. Reconstitution of Salicornia veneta PSII preparation with partially purified spinach PsbP and PsbQ restored oxygen evolution activity at low Cl- and Ca2+ concentrations. Adaptation to high salt makes several PSII proteins dispensable.
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Affiliation(s)
- Andrea Trotta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy; Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland
| | - Simone Barera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy
| | - Francesco Marsano
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy
| | - Domenico Osella
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy
| | - Davide Musso
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy
| | - Cristina Pagliano
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Viale Duca degli Abruzzi 24, I-10129, Torino, Italy
| | - Flora Andreucci
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy
| | - Roberto Barbato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Michel 11, I-15121, Alessandria, Italy.
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Emiliani J, D'Andrea L, Lorena Falcone Ferreyra M, Maulión E, Rodriguez E, Rodriguez-Concepción M, Casati P. A role for β,β-xanthophylls in Arabidopsis UV-B photoprotection. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4921-4933. [PMID: 29945243 DOI: 10.1093/jxb/ery242] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 06/21/2018] [Indexed: 06/08/2023]
Abstract
Plastidial isoprenoids, such as carotenoids and tocopherols, are important anti-oxidant metabolites synthesized in plastids from precursors generated by the methylerythritol 4-phosphate (MEP) pathway. In this study, we found that irradiation of Arabidopsis thaliana plants with UV-B caused a strong increase in the accumulation of the photoprotective xanthophyll zeaxanthin but also resulted in slightly higher levels of γ-tocopherol. Plants deficient in the MEP enzymes 1-deoxy-D-xylulose 5-phosphate synthase and 1-hydroxy-2-methyl-2-butenyl 4-diphosphate synthase showed a general reduction in both carotenoids and tocopherols and this was associated with increased DNA damage and decreased photosynthesis after exposure to UV-B. Genetic blockage of tocopherol biosynthesis did not affect DNA damage accumulation. In contrast, lut2 mutants that accumulate β,β-xanthophylls showed decreased DNA damage when irradiated with UV-B. Analysis of aba2 mutants showed that UV-B protection was not mediated by ABA (a hormone derived from β,β-xanthophylls). Plants accumulating β,β-xanthophylls also showed decreased oxidative damage and increased expression of DNA-repair enzymes, suggesting that this may be a mechanism for these plants to decrease DNA damage. In addition, in vitro experiments also provided evidence that β,β-xanthophylls can directly protect against DNA damage by absorbing radiation. Together, our results suggest that xanthophyll-cycle carotenoids that protect against excess illumination may also contribute to protection against UV-B.
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Affiliation(s)
- Julia Emiliani
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Universidad Nacional de Rosario, Rosario, Argentina
| | - Lucio D'Andrea
- Program of Plant Metabolism and Metabolic Engineering, Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB Bellaterra, Barcelona, Spain
| | | | - Evangelina Maulión
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Universidad Nacional de Rosario, Rosario, Argentina
| | - Eduardo Rodriguez
- Instituto de Biología Molecular y Celular de Rosario, Universidad Nacional de Rosario, Rosario, Argentina
| | - Manuel Rodriguez-Concepción
- Program of Plant Metabolism and Metabolic Engineering, Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB Bellaterra, Barcelona, Spain
| | - Paula Casati
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Universidad Nacional de Rosario, Rosario, Argentina
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31
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Affiliation(s)
- Dimitrios A. Pantazis
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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32
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Pawłowicz I, Waśkiewicz A, Perlikowski D, Rapacz M, Ratajczak D, Kosmala A. Remodeling of chloroplast proteome under salinity affects salt tolerance of Festuca arundinacea. PHOTOSYNTHESIS RESEARCH 2018; 137:475-492. [PMID: 29881986 DOI: 10.1007/s11120-018-0527-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
Acclimation of photosynthetic apparatus to variable environmental conditions is an important component of tolerance to dehydration stresses, including salinity. The present study deals with the research on alterations in chloroplast proteome of the forage grasses. Based on chlorophyll fluorescence parameters, two genotypes of a model grass species-Festuca arundinacea with distinct levels of salinity tolerance: low salt tolerant (LST) and high salt tolerant (HST), were selected. Next, two-dimensional electrophoresis and mass spectrometry were applied under both control and salt stress conditions to identify proteins accumulated differentially between these two genotypes. The physiological analysis revealed that under NaCl treatment the studied plants differed in photosystem II activity, water content, and ion accumulation. The differentially accumulated proteins included ATPase B, ATP synthase, ribulose-1,5-bisphosphate carboxylase large and small subunits, cytochrome b6-f complex iron-sulfur subunit, oxygen-evolving enhancer proteins (OEE), OEE1 and OEE2, plastidic fructose-bisphosphate aldolase (pFBA), and lipocalin. A higher level of lipocalin, potentially involved in prevention of lipid peroxidation under stress, was also observed in the HST genotype. Our physiological and proteomic results performed for the first time on the species of forage grasses clearly showed that chloroplast metabolism adjustment could be a crucial factor in developing salinity tolerance.
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Affiliation(s)
- Izabela Pawłowicz
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland.
| | - Agnieszka Waśkiewicz
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-637, Poznan, Poland
| | - Dawid Perlikowski
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland
| | - Marcin Rapacz
- Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture in Krakow, Podluzna 3, 30-239, Krakow, Poland
| | - Dominika Ratajczak
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland
| | - Arkadiusz Kosmala
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland
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33
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Asada M, Nishimura T, Ifuku K, Mino H. Location of the extrinsic subunit PsbP in photosystem II studied by pulsed electron-electron double resonance. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018. [DOI: 10.1016/j.bbabio.2018.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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34
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Ferrero-Serrano Á, Su Z, Assmann SM. Illuminating the role of the Gα heterotrimeric G protein subunit, RGA1, in regulating photoprotection and photoavoidance in rice. PLANT, CELL & ENVIRONMENT 2018; 41:451-468. [PMID: 29216416 DOI: 10.1111/pce.13113] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 11/19/2017] [Accepted: 11/21/2017] [Indexed: 05/22/2023]
Abstract
We studied physiological mechanisms of photoavoidance and photoprotection of a dwarf rice mutant with erect leaves, d1, in which the RGA1 gene, which encodes the Gα subunit of the heterotrimeric G protein, is non-functional. Leaves of d1 exhibit lower leaf temperature and higher photochemical reflectance index relative to wild type (WT), indicative of increased photoavoidance and more efficient light harvesting. RNA sequencing analysis of flag leaves revealed that messenger RNA levels of genes encoding heat shock proteins, enzymes associated with chlorophyll breakdown, and ROS scavengers were down-regulated in d1. By contrast, genes encoding proteins associated with light harvesting, Photosystem II, cyclic electron transport, Photosystem I, and chlorophyll biosynthesis were up-regulated in d1. Consistent with these observations, when WT and d1 plants were experimentally subjected to the same light intensity, d1 plants exhibited a greater capacity to dissipate excess irradiance (increased nonphotochemical quenching) relative to WT. The increased capacity in d1 for both photoavoidance and photoprotection reduced sustained photoinhibitory damage, as revealed by a higher Fv /Fm . We therefore propose RGA1 as a regulator of photoavoidance and photoprotection mechanisms in rice and highlight the prospect of exploiting modulation of heterotrimeric G protein signalling to increase these characteristics and improve the yield of cereals in the event of abiotic stress.
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Affiliation(s)
- Ángel Ferrero-Serrano
- Biology Department, Penn State University, 208 Mueller Laboratory, University Park, PA, 16802, USA
| | - Zhao Su
- Biology Department, Penn State University, 208 Mueller Laboratory, University Park, PA, 16802, USA
| | - Sarah M Assmann
- Biology Department, Penn State University, 208 Mueller Laboratory, University Park, PA, 16802, USA
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Sakashita N, Watanabe HC, Ikeda T, Ishikita H. Structurally conserved channels in cyanobacterial and plant photosystem II. PHOTOSYNTHESIS RESEARCH 2017; 133:75-85. [PMID: 28188547 DOI: 10.1007/s11120-017-0347-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 01/29/2017] [Indexed: 06/06/2023]
Abstract
In the cyanobacterial photosystem II (PSII), the O4-water chain in the D1 and CP43 proteins, a chain of water molecules that are directly H-bonded to O4 of the Mn4Ca cluster, is linked with a channel that connects the protein bulk surface along with a membrane-extrinsic protein subunit, PsbU (O4-PsbU channel). The cyanobacterial PSII structure also shows that the O1 site of the Mn4Ca cluster has a chain of H-bonded water molecules, which is linked with the channel that proceeds toward the bulk surface via PsbU and PsbV (O1-PsbU/V channel). Membrane-extrinsic protein subunits PsbU and PsbV in cyanobacterial PSII are replaced with PsbP and PsbQ in plant PSII. However, these four proteins have no structural similarity. It remains unknown whether the corresponding channels also exist in plant PSII, because water molecules are not identified in the plant PSII cryo-electron microscopy (cryo-EM) structure. Using the cyanobacterial and plant PSII structures, we analyzed the channels that proceed from the Mn4Ca cluster. The cyanobacterial O4-PsbU and O1-PsbU/V channels were structurally conserved as the channel that proceeds along PsbP toward the protein bulk surface in the plant PSII (O4-PsbP and O1-PsbP channels, respectively). Calculated protonation states indicated that in contrast to the original geometry of the plant cryo-EM structure, protonated PsbP-Lys166 may form a salt-bridge with ionized D1-Glu329 and protonated PsbP-Lys173 may form a salt-bridge with ionized PsbQ-Asp28 near the O1-PsbP channel. The existence of these channels might explain the molecular mechanism of how PsbP can interact with the Mn4Ca cluster.
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Affiliation(s)
- Naoki Sakashita
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan
| | - Hiroshi C Watanabe
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan
| | - Takuya Ikeda
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan
| | - Hiroshi Ishikita
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan.
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.
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36
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Yu X, Hou Y, Chen W, Wang S, Wang P, Qu S. Malus hupehensis miR168 Targets to ARGONAUTE1 and Contributes to the Resistance against Botryosphaeria dothidea Infection by Altering Defense Responses. PLANT & CELL PHYSIOLOGY 2017; 58:1541-1557. [PMID: 28633325 DOI: 10.1093/pcp/pcx080] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 05/29/2017] [Indexed: 05/23/2023]
Abstract
MicroRNA (miRNA)-mediated post-transcriptional regulation plays a fundamental role in various plant physiological processes, including responses to pathogens. MicroRNA168 has been implicated as an essential factor of miRNA pathways by targeting ARGONAUTE1 (AGO1), the core component of the RNA-induced silencing complex (RISC). A fluctuation in AGO1 expression influences various plant-pathogen interactions, and the homeostasis of AGO1 and miR168 accumulation is maintained by a complicated feedback regulatory loop. In this study, the connection between miR168 and the resistance of Malus hupehensis to Botryosphaeria dothidea is revealed. The induction of both the mature miR168 and its precursor in plants subjected to B. dothidea infection indicate the transcriptional activation of MIR168a. MIR168a promoter analysis demonstrates that the promoter can be activated by B. dothidea and salicylic acid (SA). However, the direct target of miR168, M. hupehensis ARGONAUTE1 (MhAGO1), is shown to be induced under the infection. Expression and transcription activity analysis demonstrate the transcriptional activation and the post-transcriptional suppression of MhAGO1 in response to B. dothidea infection. By inhibiting reactive oxygen species (ROS) production and enhancing SA-mediated defense responses, miR168a delays the symptom development of leaves inoculated with B. dothidea and impedes the pathogen growth, while MhAGO1 is found to have the opposite effects. Collectively, these findings suggest that the expression of miR168 and MhAGO1 in M. hupehensis in response to B. dothidea infection is regulated by a complicated mechanism. Targeting to MhAGO1, a negative regulator, miR168 plays a positive role in the resistance by alterations in diverse defense responses.
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Affiliation(s)
- Xinyi Yu
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
- Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, PR China
| | - Yingjun Hou
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Weiping Chen
- College of Agriculture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Sanhong Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Peihong Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Shenchun Qu
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, PR China
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37
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Nishimura T, Sato F, Ifuku K. In vivo system for analyzing the function of the PsbP protein using Chlamydomonas reinhardtii. PHOTOSYNTHESIS RESEARCH 2017; 133:117-127. [PMID: 28341915 DOI: 10.1007/s11120-017-0370-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/14/2017] [Indexed: 06/06/2023]
Abstract
The PsbP protein is an extrinsic subunit of photosystem II (PSII) specifically developed in green-plant species including land plants and green algae. The protein-protein interactions involving PsbP and its effect on oxygen evolution have been investigated in vitro using isolated PSII membranes. However, the importance of those interactions needs to be examined at the cellular level. To this end, we developed a system expressing exogenous PsbP in the background of the Chlamydomonas BF25 mutant lacking native PsbP. Expression of His-tagged PsbP successfully restored the oxygen-evolving activity and photoautotrophic growth of the mutant, while PsbP-∆15 lacking the N-terminal 15 residues, which are crucial for the oxygen-evolving activity of spinach PSII in vitro, only partially did. This demonstrated the importance of N-terminal sequence of PsbP for the photosynthetic activity in vivo. Furthermore, the PSII-LHCII supercomplex can be specifically purified from the Chlamydomonas cells having His-tagged PsbP using a metal affinity chromatography. This study provides a platform not only for the functional analysis of PsbP in vivo but also for structural analysis of the PSII-LHCII supercomplex from green algae.
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Affiliation(s)
- Taishi Nishimura
- Graduate School of Biostudies, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Fumihiko Sato
- Graduate School of Biostudies, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Kentaro Ifuku
- Graduate School of Biostudies, Kyoto University, Sakyo, Kyoto, 606-8502, Japan.
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38
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Tsai CC, Wu YJ, Sheue CR, Liao PC, Chen YH, Li SJ, Liu JW, Chang HT, Liu WL, Ko YZ, Chiang YC. Molecular Basis Underlying Leaf Variegation of a Moth Orchid Mutant ( Phalaenopsis aphrodite subsp. formosana). FRONTIERS IN PLANT SCIENCE 2017; 8:1333. [PMID: 28798769 PMCID: PMC5529386 DOI: 10.3389/fpls.2017.01333] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 07/17/2017] [Indexed: 05/24/2023]
Abstract
Leaf variegation is often the focus of plant breeding. Here, we studied a variegated mutant of Phalaenopsis aphrodite subsp. formosana, which is usually used as a parent of horticultural breeding, to understand its anatomic and genetic regulatory mechanisms in variegation. Chloroplasts with well-organized thylakoids and starch grains were found only in the mesophyll cells of green sectors but not of yellow sectors, confirming that the variegation belongs to the chlorophyll type. The two-dimensional electrophoresis and LC/MS/MS also reveal differential expressions of PsbP and PsbO between the green and yellow leaf sectors. Full-length cDNA sequencing revealed that mutant transcripts were caused by intron retention. When conditioning on the total RNA expression, we found that the functional transcript of PsbO and mutant transcript of PsbP are higher expressed in the yellow sector than in the green sector, suggesting that the post-transcriptional regulation of PsbO and PsbP differentiates the performance between green and yellow sectors. Because PsbP plays an important role in the stability of thylakoid folding, we suggest that the negative regulation of PsbP may inhibit thylakoid development in the yellow sectors. This causes chlorophyll deficiency in the yellow sectors and results in leaf variegation. We also provide evidence of the link of virus CymMV and the formation of variegation according to the differential expression of CymMV between green and yellow sectors.
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Affiliation(s)
- Chi-Chu Tsai
- Kaohsiung District Agricultural Research and Extension StationPingtung, Taiwan
- Department of Biological Science and Technology, National Pingtung University of Science and TechnologyPingtung, Taiwan
| | - Yu-Jen Wu
- Department of Food Science and Nutrition, Meiho UniversityPingtung, Taiwan
| | - Chiou-Rong Sheue
- Department of Life Sciences and Research Center for Global Change Biology, National Chung Hsing UniversityTaichung, Taiwan
| | - Pei-Chun Liao
- Department of Life Science, National Taiwan Normal UniversityTaipei, Taiwan
| | - Ying-Hao Chen
- Kaohsiung District Agricultural Research and Extension StationPingtung, Taiwan
| | - Shu-Ju Li
- Kaohsiung District Agricultural Research and Extension StationPingtung, Taiwan
| | - Jian-Wei Liu
- Department of Life Sciences and Research Center for Global Change Biology, National Chung Hsing UniversityTaichung, Taiwan
| | - Han-Tsung Chang
- Department of Food Science and Nutrition, Meiho UniversityPingtung, Taiwan
| | - Wen-Lin Liu
- Kaohsiung District Agricultural Research and Extension StationPingtung, Taiwan
| | - Ya-Zhu Ko
- Department of Biological Sciences, National Sun Yat-sen UniversityKaohsiung, Taiwan
| | - Yu-Chung Chiang
- Department of Biological Sciences, National Sun Yat-sen UniversityKaohsiung, Taiwan
- Department of Biomedical Science and Environment Biology, Kaohsiung Medical UniversityKaohsiung, Taiwan
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Miller MAE, O’Cualain R, Selley J, Knight D, Karim MF, Hubbard SJ, Johnson GN. Dynamic Acclimation to High Light in Arabidopsis thaliana Involves Widespread Reengineering of the Leaf Proteome. FRONTIERS IN PLANT SCIENCE 2017; 8:1239. [PMID: 28775726 PMCID: PMC5517461 DOI: 10.3389/fpls.2017.01239] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 06/30/2017] [Indexed: 05/18/2023]
Abstract
Leaves of Arabidopsis thaliana transferred from low to high light increase their capacity for photosynthesis, a process of dynamic acclimation. A mutant, gpt2, lacking a chloroplast glucose-6-phosphate/phosphate translocator, is deficient in its ability to acclimate to increased light. Here, we have used a label-free proteomics approach, to perform relative quantitation of 1993 proteins from Arabidopsis wild type and gpt2 leaves exposed to increased light. Data are available via ProteomeXchange with identifier PXD006598. Acclimation to light is shown to involve increases in electron transport and carbon metabolism but no change in the abundance of photosynthetic reaction centers. The gpt2 mutant shows a similar increase in total protein content to wild type but differences in the extent of change of certain proteins, including in the relative abundance of the cytochrome b6f complex and plastocyanin, the thylakoid ATPase and selected Benson-Calvin cycle enzymes. Changes in leaf metabolite content as plants acclimate can be explained by changes in the abundance of enzymes involved in metabolism, which were reduced in gpt2 in some cases. Plants of gpt2 invest more in stress-related proteins, suggesting that their reduced ability to acclimate photosynthetic capacity results in increased stress.
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Affiliation(s)
- Matthew A. E. Miller
- School of Earth and Environmental Sciences, University of ManchesterManchester, United Kingdom
| | - Ronan O’Cualain
- School of Biological Sciences, University of ManchesterManchester, United Kingdom
| | - Julian Selley
- School of Biological Sciences, University of ManchesterManchester, United Kingdom
| | - David Knight
- School of Biological Sciences, University of ManchesterManchester, United Kingdom
| | - Mohd F. Karim
- School of Earth and Environmental Sciences, University of ManchesterManchester, United Kingdom
| | - Simon J. Hubbard
- School of Biological Sciences, University of ManchesterManchester, United Kingdom
| | - Giles N. Johnson
- School of Earth and Environmental Sciences, University of ManchesterManchester, United Kingdom
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Kohzuma K, Froehlich JE, Davis GA, Temple JA, Minhas D, Dhingra A, Cruz JA, Kramer DM. The Role of Light-Dark Regulation of the Chloroplast ATP Synthase. FRONTIERS IN PLANT SCIENCE 2017; 8:1248. [PMID: 28791032 PMCID: PMC5522872 DOI: 10.3389/fpls.2017.01248] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 07/03/2017] [Indexed: 05/18/2023]
Abstract
The chloroplast ATP synthase catalyzes the light-driven synthesis of ATP and is activated in the light and inactivated in the dark by redox-modulation through the thioredoxin system. It has been proposed that this down-regulation is important for preventing wasteful hydrolysis of ATP in the dark. To test this proposal, we compared the effects of extended dark exposure in Arabidopsis lines expressing the wild-type and mutant forms of ATP synthase that are redox regulated or constitutively active. In contrast to the predictions of the model, we observed that plants with wild-type redox regulation lost photosynthetic capacity rapidly in darkness, whereas those expressing redox-insensitive form were far more stable. To explain these results, we propose that in wild-type plants, down-regulation of ATP synthase inhibits ATP hydrolysis, leading to dissipation of thylakoid proton motive force (pmf) and subsequent inhibition of protein transport across the thylakoid through the twin arginine transporter (Tat)-dependent and Sec-dependent import pathways, resulting in the selective loss of specific protein complexes. By contrast, in mutants with a redox-insensitive ATP synthase, pmf is maintained by ATP hydrolysis, thus allowing protein transport to maintain photosynthetic activities for extended periods in the dark. Hence, a basal level of Tat-dependent, as well as, Sec-dependent import activity, in the dark helps replenishes certain components of the photosynthetic complexes and thereby aids in maintaining overall complex activity. However, the influence of a dark pmf on thylakoid protein import, by itself, could not explain all the effects we observed in this study. For example, we also observed in wild type plants a large transient buildup of thylakoid pmf and nonphotochemical exciton quenching upon sudden illumination of dark adapted plants. Therefore, we conclude that down-regulation of the ATP synthase is probably not related to preventing loss of ATP per se. Instead, ATP synthase redox regulation may be impacting a number of cellular processes such as (1) the accumulation of chloroplast proteins and/or ions or (2) the responses of photosynthesis to rapid changes in light intensity. A model highlighting the complex interplay between ATP synthase regulation and pmf in maintaining various chloroplast functions in the dark is presented. Significance Statement: We uncover an unexpected role for thioredoxin modulation of the chloroplast ATP synthase in regulating the dark-stability of the photosynthetic apparatus, most likely by controlling thylakoid membrane transport of proteins and ions.
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Affiliation(s)
- Kaori Kohzuma
- Department of Energy Plant Research Laboratory, Michigan State University, East LansingMI, United States
| | - John E. Froehlich
- Department of Energy Plant Research Laboratory, Michigan State University, East LansingMI, United States
- Department of Biochemistry and Molecular Biology, Michigan State University, East LansingMI, United States
- *Correspondence: John E. Froehlich,
| | - Geoffry A. Davis
- Department of Energy Plant Research Laboratory, Michigan State University, East LansingMI, United States
- Department of Cell and Molecular Biology, Michigan State University, East LansingMI, United States
| | - Joshua A. Temple
- Department of Energy Plant Research Laboratory, Michigan State University, East LansingMI, United States
| | - Deepika Minhas
- Department of Horticulture and Landscape Architecture, Washington State University, WashingtonDC, United States
| | - Amit Dhingra
- Department of Horticulture and Landscape Architecture, Washington State University, WashingtonDC, United States
| | - Jeffrey A. Cruz
- Department of Energy Plant Research Laboratory, Michigan State University, East LansingMI, United States
- Department of Biochemistry and Molecular Biology, Michigan State University, East LansingMI, United States
| | - David M. Kramer
- Department of Energy Plant Research Laboratory, Michigan State University, East LansingMI, United States
- Department of Biochemistry and Molecular Biology, Michigan State University, East LansingMI, United States
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Zhang Y, Feng L, Jiang H, Zhang Y, Zhang S. Different Proteome Profiles between Male and Female Populus cathayana Exposed to UV-B Radiation. FRONTIERS IN PLANT SCIENCE 2017; 8:320. [PMID: 28326097 PMCID: PMC5339244 DOI: 10.3389/fpls.2017.00320] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 02/22/2017] [Indexed: 05/20/2023]
Abstract
With increasing altitude, solar UV-B radiation is enhanced. Based on the phenomenon of male-biased sex ratio of Populus cathayana Rehder in high altitude alpine area, we hypothesized that males have a faster and more sophisticated responsive mechanism to high UV-B radiation than that of females. Our previous studies have shown sexually different responses to high UV-B radiation were existed in P. cathayana at the morphological, physiological, and transcriptomic levels. However, the responses at the proteomic level remain unclear. In this study, an isobaric tag for relative and absolute quantification (iTRAQ)-based quantitative proteome analysis was performed in P. cathayana females and males. A total of 2,405 proteins were identified, with 331 proteins defined as differentially expressed proteins (DEPs). Among of these, 79 and 138 DEPs were decreased and 47 and 107 DEPs were increased under high solar UV-B radiation in females and males, respectively. A bioinformatics analysis categorized the common responsive proteins in the sexes as related to carbohydrate and energy metabolism, translation/transcription/post-transcriptional modification, photosynthesis, and redox reactions. The responsive proteins that showed differences in sex were mainly those involved in amino acid metabolism, stress response, and translation/transcription/post-transcriptional modification. This study provides proteomic profiles that poplars responding to solar UV-B radiation, and it also provides new insights into differentially sex-related responses to UV-B radiation.
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Affiliation(s)
- Yunxiang Zhang
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesChengdu, China
- University of Chinese Academy of SciencesBeijing, China
| | - Lihua Feng
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesChengdu, China
- Institute of Evolution and the Department of Evolutionary and Environmental Biology, University of HaifaHaifa, Israel
| | - Hao Jiang
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesChengdu, China
| | - Yuanbin Zhang
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesChengdu, China
| | - Sheng Zhang
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesChengdu, China
- *Correspondence: Sheng Zhang
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Fu S, Shao J, Zhou C, Hartung JS. Co-infection of Sweet Orange with Severe and Mild Strains of Citrus tristeza virus Is Overwhelmingly Dominated by the Severe Strain on Both the Transcriptional and Biological Levels. FRONTIERS IN PLANT SCIENCE 2017; 8:1419. [PMID: 28912786 PMCID: PMC5583216 DOI: 10.3389/fpls.2017.01419] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/31/2017] [Indexed: 05/18/2023]
Abstract
Citrus tristeza is one of the most destructive citrus diseases and is caused by the phloem-restricted Closterovirus, Citrus tristeza virus. Mild strain CTV-B2 does not cause obvious symptoms on indicators whereas severe strain CTV-B6 causes symptoms, including stem pitting, cupping, yellowing, and stiffening of leaves, and vein corking. Our laboratory has previously characterized changes in transcription in sweet orange separately infected with CTV-B2 and CTV-B6. In the present study, transcriptome analysis of Citrus sinensis in response to double infection by CTV-B2 and CTV-B6 was carried out. Four hundred and eleven transcripts were up-regulated and 356 transcripts were down-regulated prior to the onset of symptoms. Repressed genes were overwhelmingly associated with photosynthesis, and carbon and nucleic acid metabolism. Expression of genes related to the glycolytic, oxidative pentose phosphate (OPP), tricarboxylic acid cycle (TCA) pathways, tetrapyrrole synthesis, redox homeostasis, nucleotide metabolism, protein synthesis and post translational protein modification and folding, and cell organization were all reduced. Ribosomal composition was also greatly altered in response to infection by CTV-B2/CTV-B6. Genes that were induced were related to cell wall structure, secondary and hormone metabolism, responses to biotic stress, regulation of transcription, signaling, and secondary metabolism. Transport systems dedicated to metal ions were especially disturbed and ZIPs (Zinc Transporter Precursors) showed different expression patterns in response to co-infection by CTV-B2/CTV-B6 and single infection by CTV-B2. Host plants experienced root decline that may have contributed to Zn, Fe, and other nutrient deficiencies. Though defense responses, such as, strengthening of the cell wall, alteration of hormone metabolism, secondary metabolites, and signaling pathways, were activated, these defense responses did not suppress the spread of the pathogens and the development of symptoms. The mild strain CTV-B2 did not provide a useful level of cross-protection to citrus against the severe strain CTV-B6.
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Affiliation(s)
- Shimin Fu
- Citrus Research Institute, Southwest UniversityChongqing, China
- Molecular Plant Pathology Laboratory, United States Department of Agriculture-Agricultural Research ServiceBeltsville, MD, United States
| | - Jonathan Shao
- Molecular Plant Pathology Laboratory, United States Department of Agriculture-Agricultural Research ServiceBeltsville, MD, United States
| | - Changyong Zhou
- Citrus Research Institute, Southwest UniversityChongqing, China
| | - John S. Hartung
- Molecular Plant Pathology Laboratory, United States Department of Agriculture-Agricultural Research ServiceBeltsville, MD, United States
- *Correspondence: John S. Hartung
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Sandhu D, Atkinson T, Noll A, Johnson C, Espinosa K, Boelter J, Abel S, Dhatt BK, Barta T, Singsaas E, Sepsenwol S, Goggi AS, Palmer RG. Soybean proteins GmTic110 and GmPsbP are crucial for chloroplast development and function. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 252:76-87. [PMID: 27717480 DOI: 10.1016/j.plantsci.2016.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 07/05/2016] [Accepted: 07/13/2016] [Indexed: 06/06/2023]
Abstract
We have identified a viable-yellow and a lethal-yellow chlorophyll-deficient mutant in soybean. Segregation patterns suggested single-gene recessive inheritance for each mutant. The viable- and lethal-yellow plants showed significant reduction of chlorophyll a and b. Photochemical energy conversion efficiency and photochemical reflectance index were reduced in the viable-yellow plants relative to the wildtype, whereas the lethal-yellow plants showed no electron transport activity. The viable-yellow plants displayed reduced thylakoid stacking, while the lethal-yellow plants exhibited failure of proplastid differentiation into normal chloroplasts with grana. Genetic analysis revealed recessive epistatic interaction between the viable- and the lethal-yellow genes. The viable-yellow gene was mapped to a 58kb region on chromosome 2 that contained seven predicted genes. A frame shift mutation, due to a single base deletion in Glyma.02g233700, resulted in an early stop codon. Glyma.02g233700 encodes a translocon in the inner membrane of chloroplast (GmTic110) that plays a critical role in plastid biogenesis. The lethal-yellow gene was mapped to an 83kb region on chromosome 3 that contained 13 predicted genes. Based on the annotated functions, we sequenced three potential candidate genes. A single base insertion in the second exon of Glyma.03G230300 resulted in a truncated protein. Glyma.03G230300 encodes for GmPsbP, an extrinsic protein of Photosystem II that is critical for oxygen evolution during photosynthesis. GmTic110 and GmPsbP displayed highly reduced expression in the viable- and lethal-yellow mutants, respectively. The yellow phenotypes in the viable- and lethal-yellow mutants were due to the loss of function of GmTic110 or GmPsbP resulting in photooxidative stress.
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Affiliation(s)
| | - Taylor Atkinson
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - Andrea Noll
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - Callie Johnson
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - Katherine Espinosa
- Department of Agronomy, Iowa State University, Ames, IA 50011-1010, USA.
| | - Jessica Boelter
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - Stephanie Abel
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - Balpreet K Dhatt
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA; Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, India.
| | - Terese Barta
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - Eric Singsaas
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA; Natural Resources Research Institute, University of Minnesota, Duluth, MN, 55811, USA.
| | - Sol Sepsenwol
- Department of Biology, University of Wisconsin-Stevens Point, Stevens Point, WI 54481, USA.
| | - A Susana Goggi
- Department of Agronomy, Iowa State University, Ames, IA 50011-1010, USA.
| | - Reid G Palmer
- Department of Agronomy, Iowa State University, Ames, IA 50011-1010, USA
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Herritt M, Dhanapal AP, Fritschi FB. Identification of Genomic Loci Associated with the Photochemical Reflectance Index by Genome-Wide Association Study in Soybean. THE PLANT GENOME 2016; 9. [PMID: 27898827 DOI: 10.3835/plantgenome2015.08.0072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 02/24/2016] [Indexed: 05/10/2023]
Abstract
The photochemical reflectance index (PRI) is determined from canopy spectral reflectance measurements and can provide important information about photosynthesis. The PRI can be used to assess the epoxidation state of xanthophyll pigments, which provides information on nonphotochemical quenching (NPQ) and the amount of energy used for photosynthesis. Genome-wide association analyses were conducted to identify single-nucleotide polymorphisms (SNPs) and genomic loci associated with PRI using data from a soybean [ (L.) Merr.] diversity panel grown under field conditions over 2 yr. Based on a mixed linear model (MLM), 31 unique candidate SNPs that identify 15 putative loci on 11 chromosomes were identified. Several candidate genes known to be associated with NPQ, photosynthesis, and sugar transport processes were identified in the proximity of 10 putative loci. Violaxanthin de-epoxidase, one of the identified genes, is directly involved in the xanthophyll cycle, which plays a major role in NPQ. This study is the first to identify genomic loci for PRI and illustrates the potential of canopy spectral reflectance measurements for high-throughput phenotyping of a photosynthesis related trait. Significant SNPs, candidate genes, and genotypes contrasting for PRI identified in this study may prove useful for crop improvement efforts.
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Schmidt SB, Jensen PE, Husted S. Manganese Deficiency in Plants: The Impact on Photosystem II. TRENDS IN PLANT SCIENCE 2016; 21:622-632. [PMID: 27150384 DOI: 10.1016/j.tplants.2016.03.001] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 03/08/2016] [Accepted: 03/19/2016] [Indexed: 05/04/2023]
Abstract
Manganese (Mn) is an essential plant micronutrient with an indispensable function as a catalyst in the oxygen-evolving complex (OEC) of photosystem II (PSII). Even so, Mn deficiency frequently occurs without visual leaf symptoms, thereby masking the distribution and dimension of the problem restricting crop productivity in many places of the world. Hence, timely alleviation of latent Mn deficiency is a challenge in promoting plant growth and quality. We describe here the key mechanisms of Mn deficiency in plants by focusing on the impact of Mn on PSII stability and functionality. We also address the mechanisms underlying the differential tolerance towards Mn deficiency observed among plant genotypes, which enable Mn-efficient plants to grow on marginal land with poor Mn availability.
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Affiliation(s)
- Sidsel Birkelund Schmidt
- Plant and Soil Science Section, Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Poul Erik Jensen
- Molecular Plant Biology Section, Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Søren Husted
- Plant and Soil Science Section, Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.
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46
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Mummadisetti MP, Frankel LK, Bellamy HD, Sallans L, Goettert JS, Brylinski M, Bricker TM. Use of Protein Cross-Linking and Radiolytic Labeling To Elucidate the Structure of PsbO within Higher-Plant Photosystem II. Biochemistry 2016; 55:3204-13. [PMID: 27203407 DOI: 10.1021/acs.biochem.6b00365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We have used protein cross-linking with the zero-length cross-linker 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide, and radiolytic footprinting coupled with high-resolution tandem mass spectrometry, to examine the structure of higher-plant PsbO when it is bound to Photosystem II. Twenty intramolecular cross-linked residue pairs were identified. On the basis of this cross-linking data, spinach PsbO was modeled using the Thermosynechococcus vulcanus PsbO structure as a template, with the cross-linking distance constraints incorporated using the MODELLER program. Our model of higher-plant PsbO identifies several differences between the spinach and cyanobacterial proteins. The N-terminal region is particularly interesting, as this region has been suggested to be important for oxygen evolution and for the specific binding of PsbO to Photosystem II. Additionally, using radiolytic mapping, we have identified regions on spinach PsbO that are shielded from the bulk solvent. These domains may represent regions on PsbO that interact with other components, as yet unidentified, of the photosystem.
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Affiliation(s)
- Manjula P Mummadisetti
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Laurie K Frankel
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Henry D Bellamy
- The J. Bennett Johnston, Sr. Center for Advanced Microstructures & Devices, Louisiana State University , Baton Rouge, Louisiana 70806, United States
| | - Larry Sallans
- The Rieveschl Laboratories for Mass Spectrometry, Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States
| | - Jost S Goettert
- The J. Bennett Johnston, Sr. Center for Advanced Microstructures & Devices, Louisiana State University , Baton Rouge, Louisiana 70806, United States
| | - Michal Brylinski
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Terry M Bricker
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University , Baton Rouge, Louisiana 70803, United States
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47
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Light-induced gradual activation of photosystem II in dark-grown Norway spruce seedlings. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2016; 1857:799-809. [DOI: 10.1016/j.bbabio.2016.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 02/12/2016] [Accepted: 02/17/2016] [Indexed: 11/19/2022]
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48
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Serrano I, Audran C, Rivas S. Chloroplasts at work during plant innate immunity. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:3845-54. [PMID: 26994477 DOI: 10.1093/jxb/erw088] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The major role played by chloroplasts during light harvesting, energy production, redox homeostasis, and retrograde signalling processes has been extensively characterized. Beyond the obvious link between chloroplast functions in primary metabolism and as providers of photosynthesis-derived carbon sources and energy, a growing body of evidence supports a central role for chloroplasts as integrators of environmental signals and, more particularly, as key defence organelles. Here, we review the importance of these organelles as primary sites for the biosynthesis and transmission of pro-defence signals during plant immune responses. In addition, we highlight interorganellar communication as a crucial process for amplification of the immune response. Finally, molecular strategies used by microbes to manipulate, directly or indirectly, the production/function of defence-related signalling molecules and subvert chloroplast-based defences are also discussed.
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Affiliation(s)
- Irene Serrano
- LIPM, Université de Toulouse, INRA, CNRS, Castanet-Tolosan, France
| | - Corinne Audran
- LIPM, Université de Toulouse, INRA, CNRS, Castanet-Tolosan, France
| | - Susana Rivas
- LIPM, Université de Toulouse, INRA, CNRS, Castanet-Tolosan, France
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49
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Pi Z, Stevanato P, Sun F, Yang Y, Sun X, Zhao H, Geng G, Yu L. Proteomic changes induced by potassium deficiency and potassium substitution by sodium in sugar beet. JOURNAL OF PLANT RESEARCH 2016; 129:527-538. [PMID: 26860314 DOI: 10.1007/s10265-016-0800-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 10/20/2015] [Indexed: 06/05/2023]
Abstract
In this study, sugar beets (Beta vulgaris L.) were grown at different K(+)/Na(+) concentrations: mmol/L, 3/0 (control); 0.03/2.97 (K-Na replacement group; T(rep)); 0.03/0 (K deficiency group; T(def)) in order to investigate the effects of K(+) deficiency and replacement of K(+) by Na(+) on plant proteomics, and to explore the physiological processes influenced by Na(+) to compensate for a lack of K(+). After 22 days, fresh and dry weight as well as the Na(+) and K(+) concentration were measured and changes in proteomics were tested by 2D gel electrophoresis. Interestingly, Na(+) showed stimulation in growth of seedlings and hindrance of K(+) assimilation in T(rep). Significant changes were also observed in 27 protein spots among the treatments. These are proteins involved in photosynthesis, cellular respiration, protein folding and degradation, stress and defense, other metabolisms, transcription related, and protein synthesis. A wide range of physiological processes, including light reaction, CO2 assimilation, glycolysis, and tricaboxylic acid cycle, was impaired owing to K(+) starvation. Compensating for the effect of K(+) starvation, an increase in photosynthesis was also observed in T(rep). However, we also found a limitation of cellular respiration by Na(+). Na(+) is therefore in some ways able to recover damage due to K deficiency at protein level, but cannot functionally replace K as an essential nutrient.
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Affiliation(s)
- Zhi Pi
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Piergiorgio Stevanato
- DAFNAE, Dipartimento di Agronomia, Animali, Alimenti, Risorse Naturali e Ambiente, Università degli Studi di Padova, Viale dell'Università 16, Legnaro, Padova, 35020, Italy
| | - Fei Sun
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China
| | - Yun Yang
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China
| | - Xuewei Sun
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China
| | - Huijie Zhao
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China
| | - Gui Geng
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China.
- Chinese Academy of Agricultural Science, Institute of Sugar Beet, Harbin, 150080, China.
| | - Lihua Yu
- Key Laboratory of Sugar Beet Genetic Breeding of Heilongjiang Province, Heilongjiang University, Room 410 Nongxue Building, Xuefu Road NO. 74, Nangang District, Harbin, 150080, Heilongjiang Province, China.
- Chinese Academy of Agricultural Science, Institute of Sugar Beet, Harbin, 150080, China.
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Roose JL, Frankel LK, Mummadisetti MP, Bricker TM. The extrinsic proteins of photosystem II: update. PLANTA 2016; 243:889-908. [PMID: 26759350 DOI: 10.1007/s00425-015-2462-6] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 12/25/2015] [Indexed: 05/24/2023]
Abstract
Recent investigations have provided important new insights into the structures and functions of the extrinsic proteins of Photosystem II. This review is an update of the last major review on the extrinsic proteins of Photosystem II (Bricker et al., Biochemistry 31:4623-4628 2012). In this report, we will examine advances in our understanding of the structure and function of these components. These proteins include PsbO, which is uniformly present in all oxygenic organisms, the PsbU, PsbV, CyanoQ, and CyanoP proteins, found in the cyanobacteria, and the PsbP, PsbQ and PsbR proteins, found in the green plant lineage. These proteins serve to stabilize the Mn4CaO5 cluster and optimize oxygen evolution at physiological calcium and chloride concentrations. The mechanisms used to perform these functions, however, remain poorly understood. Recently, important new findings have significantly advanced our understanding of the structures, locations and functions of these important subunits. We will discuss the biochemical, structural and genetic studies that have been used to elucidate the roles played by these proteins within the photosystem and their locations within the photosynthetic complex. Additionally, we will examine open questions needing to be addressed to provide a coherent picture of the role of these components within the photosystem.
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Affiliation(s)
- Johnna L Roose
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Laurie K Frankel
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Manjula P Mummadisetti
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Terry M Bricker
- Division of Biochemistry and Molecular Biology, Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA.
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