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Ranjan S, Singh R, Singh M, Pathre UV, Shirke PA. Characterizing photoinhibition and photosynthesis in juvenile-red versus mature-green leaves of Jatropha curcas L. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2014; 79:48-59. [PMID: 24681755 DOI: 10.1016/j.plaphy.2014.03.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 03/05/2014] [Indexed: 05/12/2023]
Abstract
The new leaves of Jatropha curcas (L.) appear dark red in colour due to the presence of anthocyanin pigments, these leaves subsequently turn green on maturity. The aim of the study was to characterize the photosynthetic efficiency of the juvenile red and mature green leaves and to understand the possible role of anthocyanin pigment in the juvenile leaves of J. curcas. We studied the localization of anthocyanin pigment, reflectance properties, diurnal gas-exchange performance, carboxylation efficiency and photosynthetic efficiency under different light intensities by investigation of the photochemical and non-photochemical energy dissipation processes related to Photosystem II (PSII) and Photosystem I (PSI), of the juvenile and the mature leaves of J. curcas. The JIP test analysis of chlorophyll a fluorescence transients and the gas-exchange studies revels the low photosynthetic efficiency of red leaves is due to the immaturity of the leaf. The low value of quantum yield of non-photochemical energy dissipation due to acceptor side limitation, Y (NA) under high light in the red leaf, suggests that over-reduction of PSI acceptor side was prevented and it results in the accumulation of oxidized P700, which dissipates excess light energy harmlessly as heat and thereby alleviate photoinhibition of PSI in case of the juvenile red leaves. Further our results of photoinhibition and relaxation on exposure of red and green leaves to monochromatic blue light showed that effective quantum yield of PSII recovers faster and completely under darkness in juvenile red leaves as compared to mature green leaves, supporting the role of anthocyanin pigments in protecting both PSII and PSI in the red leaves.
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Affiliation(s)
- Sanjay Ranjan
- Plant Physiology Division, Council of Scientific and Industrial Research (CSIR) - National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India
| | - Ruchi Singh
- Plant Physiology Division, Council of Scientific and Industrial Research (CSIR) - National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India
| | - Munna Singh
- Chandra Shekhar Azad University of Agriculture & Technology, Kanpur 208 002, India
| | - Uday V Pathre
- Plant Physiology Division, Council of Scientific and Industrial Research (CSIR) - National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India
| | - Pramod A Shirke
- Plant Physiology Division, Council of Scientific and Industrial Research (CSIR) - National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India.
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102
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Zhou M, Sun G, Sun Z, Tang Y, Wu Y. Cotton proteomics for deciphering the mechanism of environment stress response and fiber development. J Proteomics 2014; 105:74-84. [PMID: 24680693 DOI: 10.1016/j.jprot.2014.03.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 03/16/2014] [Accepted: 03/18/2014] [Indexed: 11/25/2022]
Abstract
UNLABELLED Cotton fiber is considered as the backbone of the textile industry. The productivity of cotton crop is severely hampered by the occurrence of pathogens, pests, and various environmental factors. Nevertheless, cotton plant has developed sophisticated mechanisms to respond to environment stresses to avoid detrimental effects on its growth and development. Therefore, understanding the mechanisms of cotton fiber development and environment stress response is of considerable interest for designing agriculture breeding strategies to ensure sustainable productivity. The application of proteomics technologies to advance our knowledge in cotton fiber development and abiotic/biotic stress tolerance has increased dramatically in the last 5years as evidenced by the large amount of publications in this area. This review summarizes the work which has been reported for cotton proteomics and evaluates the findings in context of the approaches that are widely employed with the aim to generate novel insight useful for cotton improvement. BIOLOGICAL SIGNIFICANCE Cotton (Gossypium spp.) is considered as the foremost commercially important fiber crop grown all over the world and is deemed as the backbone of the textile industry. Cotton is also an important source of edible oil seed and a nutrient-rich food crop as cottonseed contains high-quality protein and oil. The growth and productivity of cotton crop are often hampered by various biotic stress factors, such as insect pests and pathogens. In addition, cotton plants are frequently subjected to unavoidable environmental factors that cause abiotic stress, such as salt, heat and drought. Proteomic techniques provide one of the best options for understanding the gene function and phenotypic changes during cotton fiber development and stress response. This review first summarizes the work which has been reported for cotton proteomics about cotton fiber development and abiotic/biotic stress tolerance, and also evaluates the findings in context of the approaches that are widely employed during last 5years, with the aim to generate novel insight useful for cotton improvement. This article is part of a Special Issue entitled: Proteomics of non-model organisms.
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Affiliation(s)
- Meiliang Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Institute of Biology, Leiden University, Sylvius Laboratory, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | - Guoqing Sun
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Zhanmin Sun
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yixiong Tang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yanmin Wu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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103
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Barkla BJ, Vera-Estrella R, Pantoja O. Progress and challenges for abiotic stress proteomics of crop plants. Proteomics 2014; 13:1801-15. [PMID: 23512887 DOI: 10.1002/pmic.201200401] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 01/07/2013] [Accepted: 01/08/2013] [Indexed: 12/12/2022]
Abstract
Plants are continually challenged to recognize and respond to adverse changes in their environment to avoid detrimental effects on growth and development. Understanding the mechanisms that crop plants employ to resist and tolerate abiotic stress is of considerable interest for designing agriculture breeding strategies to ensure sustainable productivity. The application of proteomics technologies to advance our knowledge in crop plant abiotic stress tolerance has increased dramatically in the past few years as evidenced by the large amount of publications in this area. This is attributed to advances in various technology platforms associated with MS-based techniques as well as the accessibility of proteomics units to a wider plant research community. This review summarizes the work which has been reported for major crop plants and evaluates the findings in context of the approaches that are widely employed with the aim to encourage broadening the strategies used to increase coverage of the proteome.
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Affiliation(s)
- Bronwyn J Barkla
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México.
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104
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Antioxidant responses of halophyte plant Aeluropus littoralis under long-term salinity stress. Biologia (Bratisl) 2014. [DOI: 10.2478/s11756-014-0338-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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105
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Shanker AK, Maheswari M, Yadav SK, Desai S, Bhanu D, Attal NB, Venkateswarlu B. Drought stress responses in crops. Funct Integr Genomics 2014; 14:11-22. [PMID: 24408129 DOI: 10.1007/s10142-013-0356-x] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 12/04/2013] [Accepted: 12/18/2013] [Indexed: 01/09/2023]
Abstract
Among the effects of impending climate change, drought will have a profound impact on crop productivity in the future. Response to drought stress has been studied widely, and the model plant Arabidopsis has guided the studies on crop plants with genome sequence information viz., rice, wheat, maize and sorghum. Since the value of functions of genes, dynamics of pathways and interaction of networks for drought tolerance in plants can only be judged by evidence from field performance, this mini-review provides a research update focussing on the current developments on the response to drought in crop plants. Studies in Arabidopsis provide the basis for interpreting the available information in a systems biology perspective. In particular, the elucidation of the mechanism of drought stress response in crops is considered from evidence-based outputs emerging from recent omic studies in crops.
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Affiliation(s)
- Arun K Shanker
- Division of Crop Sciences, Central Research Institute for Dryland Agriculture (CRIDA), Santoshnagar, Saidabad P.O, Hyderabad, 500-059, India,
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106
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Singh R, Naskar J, Pathre UV, Shirke PA. Reflectance and cyclic electron flow as an indicator of drought stress in cotton (Gossypium hirsutum). Photochem Photobiol 2013; 90:544-51. [PMID: 24246098 DOI: 10.1111/php.12213] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 11/14/2013] [Indexed: 11/29/2022]
Abstract
The response and the functioning of the photosynthetic machinery of cotton, Gossypium hirsutum during water stress was studied by leaf optical properties, linear (ETRII) and cyclic electron flow (CEF) and chlorophyll a fluorescence. We observed that in G. hirsutum, during water limitation, Chlorophyll b showed the best correlation with reflectance at 731 nm and is a better indicator of drought. Fv /Fm was observed to be very insensitive to mild water stress. However, during severe water stress the leaves exhibit considerable inhibition in Fv /Fm and an increase in anthocyanin levels by about 20-fold. CEF was very responsive to mild water stress. The mild drought stress caused large decrease in the ability of the leaves to utilize the light energy. Photosystem I and photosystem II is protected from photoinhibition by high CEF and nonphotochemical quenching under mild water stress. While during severe drought stress, linear electron flow showed a sharp decrease in comparison to CEF. CEF play a major role in G. hirsutum leaves during mild as well as under severe water stress condition and is thus a good indicator of water stress.
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Affiliation(s)
- Ruchi Singh
- Plant Physiology Division, CSIR - National Botanical Research Institute, Lucknow, India
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107
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Bowman MJ, Park W, Bauer PJ, Udall JA, Page JT, Raney J, Scheffler BE, Jones DC, Campbell BT. RNA-Seq transcriptome profiling of upland cotton (Gossypium hirsutum L.) root tissue under water-deficit stress. PLoS One 2013; 8:e82634. [PMID: 24324815 PMCID: PMC3855774 DOI: 10.1371/journal.pone.0082634] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Accepted: 11/04/2013] [Indexed: 11/19/2022] Open
Abstract
An RNA-Seq experiment was performed using field grown well-watered and naturally rain fed cotton plants to identify differentially expressed transcripts under water-deficit stress. Our work constitutes the first application of the newly published diploid D5 Gossypium raimondii sequence in the study of tetraploid AD1 upland cotton RNA-seq transcriptome analysis. A total of 1,530 transcripts were differentially expressed between well-watered and water-deficit stressed root tissues, in patterns that confirm the accuracy of this technique for future studies in cotton genomics. Additionally, putative sequence based genome localization of differentially expressed transcripts detected A2 genome specific gene expression under water-deficit stress. These data will facilitate efforts to understand the complex responses governing transcriptomic regulatory mechanisms and to identify candidate genes that may benefit applied plant breeding programs.
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Affiliation(s)
- Megan J. Bowman
- USDA-ARS, Coastal Plains Soil, Water and Plant Research Center, Florence, South Carolina, United States of America
| | - Wonkeun Park
- USDA-ARS, Coastal Plains Soil, Water and Plant Research Center, Florence, South Carolina, United States of America
- Clemson University Pee Dee Research and Education Center, Florence, South Carolina, United States of America
| | - Philip J. Bauer
- USDA-ARS, Coastal Plains Soil, Water and Plant Research Center, Florence, South Carolina, United States of America
| | - Joshua A. Udall
- Brigham Young University, Provo, Utah, United States of America
| | - Justin T. Page
- Brigham Young University, Provo, Utah, United States of America
| | - Joshua Raney
- Brigham Young University, Provo, Utah, United States of America
| | | | - Don. C. Jones
- Cotton Incorporated, Agricultural and Environmental Research, Cary, North Carolina, United States of America
| | - B. Todd Campbell
- USDA-ARS, Coastal Plains Soil, Water and Plant Research Center, Florence, South Carolina, United States of America
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108
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Deswal R, Gupta R, Dogra V, Singh R, Abat JK, Sarkar A, Mishra Y, Rai V, Sreenivasulu Y, Amalraj RS, Raorane M, Chaudhary RP, Kohli A, Giri AP, Chakraborty N, Zargar SM, Agrawal VP, Agrawal GK, Job D, Renaut J, Rakwal R. Plant proteomics in India and Nepal: current status and challenges ahead. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2013; 19:461-477. [PMID: 24431515 PMCID: PMC3781272 DOI: 10.1007/s12298-013-0198-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Plant proteomics has made tremendous contributions in understanding the complex processes of plant biology. Here, its current status in India and Nepal is discussed. Gel-based proteomics is predominantly utilized on crops and non-crops to analyze majorly abiotic (49 %) and biotic (18 %) stress, development (11 %) and post-translational modifications (7 %). Rice is the most explored system (36 %) with major focus on abiotic mainly dehydration (36 %) stress. In spite of expensive proteomics setup and scarcity of trained workforce, output in form of publications is encouraging. To boost plant proteomics in India and Nepal, researchers have discussed ground level issues among themselves and with the International Plant Proteomics Organization (INPPO) to act in priority on concerns like food security. Active collaboration may help in translating this knowledge to fruitful applications.
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Affiliation(s)
- Renu Deswal
- />Molecular Plant Physiology and Proteomics Laboratory, Department of Botany, University of Delhi, Delhi, India
| | - Ravi Gupta
- />Molecular Plant Physiology and Proteomics Laboratory, Department of Botany, University of Delhi, Delhi, India
| | - Vivek Dogra
- />Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh India
| | - Raksha Singh
- />Department of Plant Molecular Biology, College of Life Science, Sejong University, Seoul, Republic of Korea
| | - Jasmeet Kaur Abat
- />Department of Botany, Gargi College, University of Delhi, New Delhi, India
| | - Abhijit Sarkar
- />Department of Botany, Banaras Hindu University, Varanasi, India
- />Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO Box 13265, Kathmandu, Nepal
| | - Yogesh Mishra
- />Department of Plant Physiology, Umeå Plant Science Center, Umeå University, Umeå, Sweden
| | - Vandana Rai
- />National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi, India
| | - Yelam Sreenivasulu
- />Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh India
| | - Ramesh Sundar Amalraj
- />Plant Pathology Section, Sugarcane Breeding Institute, Indian Council of Agricultural Research, Tamil Nadu, India
| | - Manish Raorane
- />Plant Molecular Biology Laboratory, Plant Breeding, Genetics and Biotechnology, International Rice Research Institute, Manila, Philippines
| | - Ram Prasad Chaudhary
- />Central Department of Botany, and Research Centre for Applied Science and Technology, Tribhuvan University, Kirtipur, Nepal
| | - Ajay Kohli
- />Plant Molecular Biology Laboratory, Plant Breeding, Genetics and Biotechnology, International Rice Research Institute, Manila, Philippines
| | - Ashok Prabhakar Giri
- />Plant Molecular Biology Unit, Division of Biochemical Sciences, National Chemical Laboratory, Pune, India
| | | | - Sajad Majeed Zargar
- />School of Biotechnology, SK University of Agricultural Sciences and Technology, Chatha, Jammu, 180009 Jammu and Kashmir India
| | | | - Ganesh Kumar Agrawal
- />Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO Box 13265, Kathmandu, Nepal
| | - Dominique Job
- />CNRS/Bayer Crop Science (UMR 5240) Joint Laboratory, Lyon, France
| | - Jenny Renaut
- />Department of Environment and Agrobiotechnologies, Centre de Recherche Public-Gabriel Lippmann, Belvaux, GD Luxembourg
| | - Randeep Rakwal
- />Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO Box 13265, Kathmandu, Nepal
- />Organization for Educational Initiatives, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 Japan
- />Department of Anatomy I, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa, Tokyo 142-8555 Japan
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109
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Li MW, Qi X, Ni M, Lam HM. Silicon era of carbon-based life: application of genomics and bioinformatics in crop stress research. Int J Mol Sci 2013; 14:11444-83. [PMID: 23759993 PMCID: PMC3709742 DOI: 10.3390/ijms140611444] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 05/07/2013] [Accepted: 05/17/2013] [Indexed: 01/25/2023] Open
Abstract
Abiotic and biotic stresses lead to massive reprogramming of different life processes and are the major limiting factors hampering crop productivity. Omics-based research platforms allow for a holistic and comprehensive survey on crop stress responses and hence may bring forth better crop improvement strategies. Since high-throughput approaches generate considerable amounts of data, bioinformatics tools will play an essential role in storing, retrieving, sharing, processing, and analyzing them. Genomic and functional genomic studies in crops still lag far behind similar studies in humans and other animals. In this review, we summarize some useful genomics and bioinformatics resources available to crop scientists. In addition, we also discuss the major challenges and advancements in the "-omics" studies, with an emphasis on their possible impacts on crop stress research and crop improvement.
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Affiliation(s)
- Man-Wah Li
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
| | - Xinpeng Qi
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
| | - Meng Ni
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
| | - Hon-Ming Lam
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
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110
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Han Q, Kang G, Guo T. Proteomic analysis of spring freeze-stress responsive proteins in leaves of bread wheat (Triticum aestivum L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 63:236-44. [PMID: 23298682 DOI: 10.1016/j.plaphy.2012.12.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 12/08/2012] [Indexed: 05/02/2023]
Abstract
Following three-day exposure to -5 °C simulated spring freeze stress, wheat plants at the anther connective tissue formation phase of spike development displayed the drooping and wilting of leaves and markedly increased rates of relative electrolyte leakage. We analysed freeze-stress responsive proteins in wheat leaves at one and three days following freeze-stress exposure, using two-dimensional electrophoresis and matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry. Our results indicate that out of 75 protein spots successfully identified under freeze-stress conditions 52 spots were upregulated and 18 were downregulated. These spring freeze-stress responsive proteins were involved in signal transduction, stress/defence/detoxification, protein metabolism (i.e. translation, processing, and degradation), photosynthesis, amino acid metabolism, carbohydrate metabolism, and energy pathways, and may therefore be functionally relevant for many biological processes. The enhanced accumulation of signal transduction proteins such as a C2H2 zinc finger protein, stress/defence/detoxification proteins including LEA-related COR protein, disease resistance protein, Cu/Zn superoxide dismutase, and two ascorbate peroxidases may play crucial roles in the mechanisms of response to spring freeze stress in wheat plants.
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Affiliation(s)
- Qiaoxia Han
- National Engineering Research Centre for Wheat, the Key Laboratory of Physiology, Ecology and Genetic Improvement of Food Crops in Henan Province, Henan Agricultural University, 450002 Zhengzhou, China
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111
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Hughes NM, Carpenter KL, Cannon JG. Estimating contribution of anthocyanin pigments to osmotic adjustment during winter leaf reddening. JOURNAL OF PLANT PHYSIOLOGY 2013; 170:230-3. [PMID: 23088891 DOI: 10.1016/j.jplph.2012.09.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 09/23/2012] [Accepted: 09/23/2012] [Indexed: 05/18/2023]
Abstract
The association between plant water stress and synthesis of red, anthocyanin pigments in leaves has led some plant biologists to propose an osmotic function of leaf reddening. According to this hypothesis, anthocyanins function as a solute in osmotic adjustment (OA), contributing to depression of osmotic potential (Ψ(π)) and maintenance of turgor pressure during drought-stressed conditions. Here we calculate the percent contribution of anthocyanin to leaf Ψ(π) during OA in two angiosperm evergreen species, Galax urceolata and Gaultheria procumbens. Both species exhibit dramatic leaf reddening under high light during winter, concomitant with declines in leaf water potential and accumulation of solutes. Data previously published by the authors on osmotic potential at full turgor (Ψ(π,100)) of G. urceolata and G. procumbens leaves before and after leaf reddening were used to estimate OA. In vivo molar concentrations of anthocyanin, glucose, fructose, and sucrose measured from the same individuals were converted to pressure equivalents using the Ideal Gas Law, and percent contribution to OA was estimated. Estimated mean OA during winter was -0.7MPa for G. urceolata and -0.8MPa for G. procumbens. In vivo concentrations of anthocyanin (3-10mM) were estimated to account for ∼2% of OA during winter, and comprised <0.7% of Ψ(π,100) in both species. Glucose, fructose, and sucrose combined accounted for roughly 50 and 80% of OA for G. urceolata and G. procumbens, respectively, and comprised ∼20% of Ψ(π,100). We observed that a co-occurring, acyanic species (Vinca minor) achieved similar OA without synthesizing anthocyanin. We conclude that anthocyanins represent a measurable, albeit meager, component of OA in red-leafed evergreen species during winter. However, due to their low concentrations, metabolic costliness relative to other osmolytes, and striking red color (unnecessary for an osmotic function), it is unlikely that they are synthesized solely for an osmoprotectant role.
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Affiliation(s)
- Nicole M Hughes
- High Point University, Department of Biology, University Station 3591, High Point, NC 27262, USA.
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