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Swatch GK, Singh DP, Khattar JS, Mohapatra PK. Interaction of pretilachlor with PS-II activity of the cyanobacterium Desmonostoc muscorum PUPCCC 405.10. J Basic Microbiol 2020; 60:532-542. [PMID: 32159865 DOI: 10.1002/jobm.201900706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/03/2020] [Accepted: 02/26/2020] [Indexed: 11/10/2022]
Abstract
Interaction of pretilachlor with photosystem (PS)-II of the cyanobacterium Desmonostoc muscorum PUPCCC 405.10 has been studied in this paper. Pretilachlor negatively affected growth, chlorophyll a (Chl a), photosynthesis, and carbon dissimilation in a dose-dependent manner. Effects were also observed in PSs, especially PS-II (an 11-35% decrease), as well as the whole photosynthetic electron transport activity. The fluorescence emission spectrum of Chl a revealed a dose-dependent effect of pretilachlor on both the antenna and the core complex of PSs, with more severe effect on the former. Data of O-J-I-P fluorescence transient of Chl a revealed that pretilachlor interfered with electron flow between QA and QB sites of PS-II. It was further observed that pretilachlor decreased maximum fluorescence, variable and relative variable fluorescence, maximum quantum yield, quantum yield of electron transport, the rate of trapped exciton movement, quantum yield of electron transfer, and performance index of primary photochemistry; however, there was a progressive increase in the net rate of PS-II closure, quantum yield of energy dissipation, and effective antenna size per active reaction center. A decrease in photosynthetic activity leads to a decrease in carbon dissimilation, as evidenced by low activity of glucose-6-phosphate dehydrogenase and pyruvate kinase. Thus, pretilachlor, which is otherwise known to kill weeds by interfering with cell division, affected the growth of the cyanobacteria by interacting with PS-II.
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Govindjee G, Nonomura A, Lichtenthaler HK. Remembering Melvin Calvin (1911-1997), a highly versatile scientist of the 20th century. PHOTOSYNTHESIS RESEARCH 2020; 143:1-11. [PMID: 31792877 DOI: 10.1007/s11120-019-00693-y] [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: 10/07/2019] [Accepted: 11/17/2019] [Indexed: 06/10/2023]
Abstract
Melvin Calvin (1911-1997) was the recipient of the 1961 Nobel Prize in Chemistry for the discovery of the canonical photosynthetic carbon reduction cycle. We present here a very brief glimpse of this extraordinary American scientist, who in his time was a preeminent force in physical and organic chemistry. Besides natural photosynthesis, Calvin's prolific career included artificial photosynthesis, colors of organic substances, the origin of life, cancer, moon rocks, molecular basis of learning, and plant lipids & algal hydrocarbons as potential renewable sources of transport fuels.
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Affiliation(s)
- Govindjee Govindjee
- Department of Plant Biology, Department of Biochemistry and the Center of Biophysics & Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Arthur Nonomura
- Carbon Reactions of Photosynthesis Sector, Brandt iHammer, 479 Village Park Drive, Powell, OH, 43065-9178, USA
| | - Hartmut K Lichtenthaler
- Botanisches Institut II, Molekularbiologie und Biochemie der Pflanzen, Karlsruhe Institute of Technology (KIT), 76133, Karlsruhe, Germany
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Joyard J, Lichtenthaler HK. Tribute Roland Douce, 1939-2018. PHOTOSYNTHESIS RESEARCH 2019; 141:131-142. [PMID: 30877517 DOI: 10.1007/s11120-019-00634-9] [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: 02/04/2019] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
On November 4, 2018, Roland Douce, Professor Emeritus at the University of Grenoble, France, died at the age of 79. In Grenoble, where he spent most of his scientific career, Roland Douce created a world-renowned school of plant science, studying the structure, functions, and interactions of plant organelles involved in photosynthesis, respiration, and photorespiration. His main achievements concern the chemical and functional characterization of chloroplast envelope membranes, the demonstration of the uniqueness of plant mitochondria, and the integration of metabolism within the plant cell, among manifold activities. Roland Douce devoted his whole life to science and research with passion and enthusiasm: he was a true charismatic leader.
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Affiliation(s)
- Jacques Joyard
- Laboratoire de Physiologie cellulaire et végétale, Institut de Recherche Interdisciplinaire de Grenoble, Université Grenoble Alpes, CEA, CNRS, INRA, Grenoble, France.
| | - Hartmut K Lichtenthaler
- Botany 2 (Molecular Biology and Biochemistry of Plants), Karlsruhe Institute of Technology, Kaiserstr. 12, 76133, Karlsruhe, Germany
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Nonomura AM, Holtz B, Biel KY, Cooney R, Lorimer G. The paths of Andrew A. Benson: a radio-autobiography. PHOTOSYNTHESIS RESEARCH 2017; 134:93-105. [PMID: 28674935 DOI: 10.1007/s11120-017-0410-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/29/2017] [Indexed: 06/07/2023]
Abstract
Andrew A. Benson, one of the greatest biochemists of our time, is celebrated on his centennial by the authors with whom he interacted performing experiments or contemplating metabolic pathways in a wide range of biological kingdoms. He charted the chemical flow of energy in cells, tissues, organs, plants, animals, and ecosystems. Benson collaborated with hundreds of colleagues to examine the natural history of autotrophy, mixotrophy, and heterotrophy while elucidating metabolic pathways. We present here a biological perspective of his body of studies. Benson lived from September 24, 1917, to January 16, 2015. Out of over 1000 autoradiograms he produced in his life, he left a legacy of 50 labeled autoradiograms to the authors who tell the story of his life's work that resulted in Benson's Protocol (Nonomura et al., Photosynth Res 127:369-378, 2016) that has been applied, over the years, for the elucidation of major metabolic pathways by many scientists.
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Affiliation(s)
- Arthur M Nonomura
- Carbon Reactions of Photosynthesis Sector, Brandt iHammer, 479 Village Park Drive, Powell, OH, 43065, USA.
| | - Barry Holtz
- Holtz Biopharma Consulting, Bryan, TX, 77807, USA
| | - Karl Y Biel
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290
| | - Robert Cooney
- Department of Public Health Services, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - George Lorimer
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
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Shimakawa G, Akimoto S, Ueno Y, Wada A, Shaku K, Takahashi Y, Miyake C. Diversity in photosynthetic electron transport under [CO 2]-limitation: the cyanobacterium Synechococcus sp. PCC 7002 and green alga Chlamydomonas reinhardtii drive an O 2-dependent alternative electron flow and non-photochemical quenching of chlorophyll fluorescence during CO 2-limited photosynthesis. PHOTOSYNTHESIS RESEARCH 2016; 130:293-305. [PMID: 27026083 DOI: 10.1007/s11120-016-0253-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 03/22/2016] [Indexed: 06/05/2023]
Abstract
Some cyanobacteria, but not all, experience an induction of alternative electron flow (AEF) during CO2-limited photosynthesis. For example, Synechocystis sp. PCC 6803 (S. 6803) exhibits AEF, but Synechococcus elongatus sp. PCC 7942 does not. This difference is due to the presence of flavodiiron 2 and 4 proteins (FLV2/4) in S. 6803, which catalyze electron donation to O2. In this study, we observed a low-[CO2] induced AEF in the marine cyanobacterium Synechococcus sp. PCC 7002 that lacks FLV2/4. The AEF shows high affinity for O2, compared with AEF mediated by FLV2/4 in S. 6803, and can proceed under extreme low [O2] (about a few µM O2). Further, the transition from CO2-saturated to CO2-limited photosynthesis leads a preferential excitation of PSI to PSII and increased non-photochemical quenching of chlorophyll fluorescence. We found that the model green alga Chlamydomonas reinhardtii also has an O2-dependent AEF showing the same affinity for O2 as that in S. 7002. These data represent the diverse molecular mechanisms to drive AEF in cyanobacteria and green algae. In this paper, we further discuss the diversity, the evolution, and the physiological function of strategy to CO2-limitation in cyanobacterial and green algal photosynthesis.
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Affiliation(s)
- Ginga Shimakawa
- Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan.
| | - Seiji Akimoto
- Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
- Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Yoshifumi Ueno
- Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Ayumi Wada
- Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Keiichiro Shaku
- Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Yuichiro Takahashi
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama, 700-8530, Japan
| | - Chikahiro Miyake
- Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
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Chow WS, Horton P, Barrett M, Osmond CB. Remembering Joan (Jan) Mary Anderson (1932-2015). PHOTOSYNTHESIS RESEARCH 2016; 129:129-146. [PMID: 27363420 DOI: 10.1007/s11120-016-0287-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Joan Mary Anderson, known to most people as Jan, was born on May 12, 1932 in Dunedin, New Zealand. She died on August 28, 2015 in Canberra, Australia. To celebrate her life, we present here a brief biography, some comments on her discoveries in photosynthesis during a career spanning more than half a century, and reminiscences from family and friends. We remember this wonderful person who had an unflagging curiosity, creative ability to think laterally, enthusiasm, passion, generosity and love of color and culture.
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Affiliation(s)
- Wah Soon Chow
- Division of Plant Sciences, Research School of Biology, The Australian National University, 46 Sullivan's Creek Road, Acton, ACT, 2601, Australia.
| | - Peter Horton
- Grantham Centre for Sustainable Futures, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | | | - Charles Barry Osmond
- Division of Plant Sciences, Research School of Biology, The Australian National University, 46 Sullivan's Creek Road, Acton, ACT, 2601, Australia
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Sharkey TD. Hartmut Lichtenthaler: an authority on chloroplast structure and isoprenoid biochemistry. PHOTOSYNTHESIS RESEARCH 2016; 128:117-123. [PMID: 26671841 DOI: 10.1007/s11120-015-0211-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/29/2015] [Indexed: 06/05/2023]
Abstract
We pay tribute to Hartmut Lichtenthaler for making important contributions to the field of photosynthesis research. He was recently recognized for ground-breaking discoveries in chloroplast structure and isoprenoid biochemistry by the Rebeiz Foundation for Basic Research (RFBR; http://vlpbp.org/ ), receiving a 2014 Lifetime Achievement Award for Photosynthesis. The ceremony, held in Champaign, Illinois, was attended by many prominent researchers in the photosynthesis field. We provide below a brief note on his education, and then describe some of the areas in which Hartmut Lichtenthaler has been a pioneer.
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Affiliation(s)
- Thomas D Sharkey
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824-1319, USA.
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Abstract
James Alan Bassham, known to many as Al, was born on November 26, 1922, in Sacramento, California (CA), USA. He died on November 19, 2012, in El Cerrito, CA. To celebrate his life at his 3rd death anniversary, we present here a brief biography, comments on his discoveries, but most importantly, remembrances from family and friends; we remember this wonderful and modest person who had played a major pivotal role in the discoveries that led to what he would like to call the P(hotosynthetic) C(arbon) R(eduction) cycle, known to many as the Calvin Cycle, the Calvin-Benson Cycle, or the Calvin-Benson-Bassham Cycle. Based on a personal request by Bassham himself to one of us (Govindjee), we refrain from including his name in the cycle-in recognition of his many students and associates he would have liked to honor.
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Affiliation(s)
- Helen Bassham
- Institute of Transportation Studies, University of California, Berkeley, 109 McLaughlin Hall, Berkeley, CA, 94720-1720, USA
| | - Susan Bassham
- Institute of Ecology and Evolution, University of Oregon, 335 Pacific Hall, 5289 University of Oregon, Eugene, OR, 97403, USA
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Nonomura A, Lorimer G, Holtz B, Vacquier V, Biel KY. Andrew A. Benson: personal recollections. PHOTOSYNTHESIS RESEARCH 2016; 127:369-378. [PMID: 26329647 DOI: 10.1007/s11120-015-0186-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 08/15/2015] [Indexed: 06/05/2023]
Abstract
Andrew A. Benson, one of the greatest and much loved scientists of our century, passed away on January 16, 2015; he was born on September 24, 1917. A grand celebration of his life was held on February 6, 2015, in California. Here, we present one of his photographs and key excerpts from what was said then, and soon thereafter.
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Affiliation(s)
- Arthur Nonomura
- Brandt iHammer, 479 Village Park Drive, Powell, OH, 43065, USA.
| | - George Lorimer
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA.
| | - Barry Holtz
- Holtz Biopharma Consulting, Austin, TX, 77807, USA.
| | - Victor Vacquier
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, 92093, USA.
| | - Karl Y Biel
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia.
- Biosphere Systems International Foundation, Tucson, AZ, 85755, USA.
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