1
|
Shi Y, Si D, Zhang X, Chen D, Han Z. Plant fructans: Recent advances in metabolism, evolution aspects and applications for human health. Curr Res Food Sci 2023; 7:100595. [PMID: 37744554 PMCID: PMC10517269 DOI: 10.1016/j.crfs.2023.100595] [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: 08/01/2022] [Revised: 04/26/2023] [Accepted: 09/14/2023] [Indexed: 09/26/2023] Open
Abstract
Fructans, fructose polymers, are one of the three major reserve carbohydrate in plants. The nutritional and therapeutic benefits of natural fructans in plants have attracted increasing interest by consumers and food industry. In the course of evolution, many plants have developed the ability of regulating plant fructans metabolism to produce fructans with different structures and chain lengths, which are strongly correlated with their survival in harsh environments. Exploring these evolution-related genes in fructans biosynthesis and de novo domestication of fructans-rich plants based on genome editing is a viable and promising approach to improve human dietary quality and reduce the risk of chronic disease. These advances will greatly facilitate breeding and production of tailor-made fructans as a healthy food ingredient from wild plants such as huangjing (Polygonatum cyrtonema). The purpose of this review is to broaden our knowledge on plant fructans biosynthesis, evolution and benefits to human health.
Collapse
Affiliation(s)
| | | | - Xinfeng Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - Donghong Chen
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - Zhigang Han
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| |
Collapse
|
2
|
Gomez-Vargas AD, Hernández-Martínez KM, López-Rosas ME, Alejo Jacuinde G, Simpson J. Evidence for Light and Tissue Specific Regulation of Genes Involved in Fructan Metabolism in Agave tequilana. PLANTS 2022; 11:plants11162153. [PMID: 36015458 PMCID: PMC9412663 DOI: 10.3390/plants11162153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 11/16/2022]
Abstract
Plant Glycoside Hydrolase Family 32 (PGHF32) contains the fructosyltransferases and fructan exohydrolase enzymes responsible for fructan metabolism, in addition to closely related vacuolar and cell wall acid invertases. Agave species produce complex and dynamic fructan molecules (agavins) requiring 4 different fructosyltransferase activities (1-SST, 1-FFT, 6G-FFT and 6-SFT) for their synthesis. Combined analysis of RNAseq and genome data for A. tequilana led to the characterization of the genes encoding 3 fructosyltransferases for this species and support the hypothesis that no separate 6-SFT type enzyme exists in A. tequilana, suggesting that at least one of the fructosyltransferases identified may have multiple enzymatic activities. Structures for PGHF32 genes varied for A. tequilana and between other plant species but were conserved for different enzyme types within a species. The observed patterns are consistent with the formation of distinct gene structures by intron loss. Promoter analysis of the PGHF32 genes identified abundant putative regulatory motifs for light regulation and tissue-specific expression, and these regulatory mechanisms were confirmed experimentally for leaf tissue. Motifs for phytohormone response, carbohydrate metabolism and dehydration responses were also uncovered. Based on the regulatory motifs, full-length cDNAs for MYB, GATA, DOF and GBF transcription factors were identified and their phylogenetic distribution determined by comparison with other plant species. In silico expression analysis for the selected transcription factors revealed both tissue-specific and developmental patterns of expression, allowing candidates to be identified for detailed analysis of the regulation of fructan metabolism in A. tequilana at the molecular level.
Collapse
|
3
|
Bakku RK, Gupta R, Min CW, Kim ST, Takahashi G, Shibato J, Shioda S, Takenoya F, Agrawal GK, Rakwal R. Unravelling the Helianthus tuberosus L. (Jerusalem Artichoke, Kiku-Imo) Tuber Proteome by Label-Free Quantitative Proteomics. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27031111. [PMID: 35164374 PMCID: PMC8840128 DOI: 10.3390/molecules27031111] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 01/31/2022] [Accepted: 02/04/2022] [Indexed: 01/09/2023]
Abstract
The present research investigates the tuber proteome of the ‘medicinal’ plant Jerusalem artichoke (abbreviated as JA) (Helianthus tuberosus L.) using a high-throughput proteomics technique. Although JA has been historically known to the Native Americans, it was introduced to Europe in the late 19th century and later spread to Japan (referred to as ‘kiku-imo’) as a folk remedy for diabetes. Genboku Takahashi research group has been working on the cultivation and utilization of kiku-imo tuber as a traditional/alternative medicine in daily life and researched on the lowering of blood sugar level, HbA1c, etc., in human subjects (unpublished data). Understanding the protein components of the tuber may shed light on its healing properties, especially related to diabetes. Using three commercially processed JA tuber products (dried powder and dried chips) we performed total protein extraction on the powdered samples using a label-free quantitate proteomic approach (mass spectrometry) and catalogued for the first time a comprehensive protein list for the JA tuber. A total of 2967 protein groups were identified, statistically analyzed, and further categorized into different protein classes using bioinformatics techniques. We discussed the association of these proteins to health and disease regulatory metabolism. Data are available via ProteomeXchange with identifier PXD030744.
Collapse
Affiliation(s)
- Ranjith Kumar Bakku
- Faculty of Engineering Information and Systems, University of Tsukuba, 1-1-1 Tenodai, Tsukuba 305-8572, Japan;
| | - Ravi Gupta
- College of General Education, Kookmin University, Seoul 02707, Korea;
| | - Cheol-Woo Min
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea;
| | - Sun-Tae Kim
- Department of Plant Bioscience, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea;
- Correspondence: (S.-T.K.); or (R.R.); Tel.: +81-90-1853-7875 (R.R.)
| | - Genboku Takahashi
- Zen-Yoga Institute, 3916 Okusa, Nakagawa-mura, Kamiina-gun, Nagano 399-3801, Japan;
| | - Junko Shibato
- Department of Functional Morphology, Shonan University Medical Sciences, 16-48 Kamishinano, Totsuka-ku, Yokohama 244-0806, Japan; (J.S.); (S.S.)
| | - Seiji Shioda
- Department of Functional Morphology, Shonan University Medical Sciences, 16-48 Kamishinano, Totsuka-ku, Yokohama 244-0806, Japan; (J.S.); (S.S.)
| | - Fumiko Takenoya
- Department of Physiology and Molecular Sciences, Hoshi University, 4-41 Ebara 2-chome, Shinagawa, Tokyo 142-8501, Japan;
| | - Ganesh Kumar Agrawal
- Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO 13265, Kathmandu 44600, Nepal;
| | - Randeep Rakwal
- Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO 13265, Kathmandu 44600, Nepal;
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8574, Japan
- Correspondence: (S.-T.K.); or (R.R.); Tel.: +81-90-1853-7875 (R.R.)
| |
Collapse
|
4
|
Production of bimodal molecular weight levan by a Lactobacillus reuteri isolate from fish gut. Folia Microbiol (Praha) 2021; 67:21-31. [PMID: 34453701 DOI: 10.1007/s12223-021-00913-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 08/12/2021] [Indexed: 10/20/2022]
Abstract
An exopolysaccharide (EPS) synthesizing potentially probiotic Gram-positive bacterial strain was isolated from fish (Tor putitora) gut, and its EPS was structurally characterized. The isolate, designated as FW2, was identified as Lactobacillus reuteri through 16S rRNA gene sequencing and phylogenetic analysis. This isolate produces fructan-type EPS using sucrose as a substrate. Based on 13C-NMR spectroscopy, methylation analysis and monosaccharide composition, the EPS was identified as a linear levan polymer with fructose as main constituent linked via β(2 → 6) linkages. Based on molecular weight (MW) distribution, two groups of levan were found to be produced by the isolate FW2: one with high MW (4.6 × 106 Da) and the other having much lower MW (1.2 × 104 Da). The isolate yielded about 14 g/L levan under optimized culturing parameters including aeration conditions, pH, temperature and substrate concentration. The obtained bimodal molecular weight linear levan is the first of its type to be synthesized by a L. reuteri isolate from fish gut. Bimodal molecular weight prebiotic levan together with the probiotic potential of the producing strain would provide a new promising synbiotic combination for use in aqua culture.
Collapse
|
5
|
Zhao P, Li X, Wang Y, Yan L, Guo L, Huang L, Gao W. Characterisation and saccharide mapping of polysaccharides from four common Polygonatum spp. Carbohydr Polym 2020; 233:115836. [DOI: 10.1016/j.carbpol.2020.115836] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/30/2019] [Accepted: 01/06/2020] [Indexed: 02/07/2023]
|
6
|
Ramos-Hernández JA, Ragazzo-Sánchez JA, Calderón-Santoyo M, Ortiz-Basurto RI, Prieto C, Lagaron JM. Use of Electrosprayed Agave Fructans as Nanoencapsulating Hydrocolloids for Bioactives. NANOMATERIALS 2018; 8:nano8110868. [PMID: 30360537 PMCID: PMC6265941 DOI: 10.3390/nano8110868] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/11/2018] [Accepted: 10/12/2018] [Indexed: 01/05/2023]
Abstract
High degree of polymerization Agave fructans (HDPAF) are presented as a novel encapsulating material. Electrospraying coating (EC) was selected as the encapsulation technique and β-carotene as the model bioactive compound. For direct electrospraying, two encapsulation methodologies (solution and emulsion) were proposed to find the formulation which provided a suitable particle morphology and an adequate concentration of β-carotene encapsulated in the particles to provide a protective effect of β-carotene by the nanocapsules. Scanning electron microscopy (SEM) images showed spherical particles with sizes ranging from 440 nm to 880 nm depending on the concentration of HDPAF and processing parameters. FTIR analysis confirmed the interaction and encapsulation of β-carotene with HDPAF. The thermal stability of β-carotene encapsulated in HDPAF was evidenced by thermogravimetric analysis (TGA). The study showed that β-carotene encapsulated in HDPAF by the EC method remained stable for up to 50 h of exposure to ultraviolet (UV) light. Therefore, HDPAF is a viable option to formulate nanocapsules as a new encapsulating material. In addition, EC allowed for increases in the ratio of β-carotene:polymer, as well as its photostability.
Collapse
Affiliation(s)
- Jorge A Ramos-Hernández
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico 2595, C.P. Tepic 63175, Nayarit, Mexico.
| | - Juan A Ragazzo-Sánchez
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico 2595, C.P. Tepic 63175, Nayarit, Mexico.
| | - Montserrat Calderón-Santoyo
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico 2595, C.P. Tepic 63175, Nayarit, Mexico.
| | - Rosa I Ortiz-Basurto
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Av. Tecnológico 2595, C.P. Tepic 63175, Nayarit, Mexico.
| | - Cristina Prieto
- Novel Materials and Nanotechnology Group, IATA-CSIC, Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain.
| | - Jose M Lagaron
- Novel Materials and Nanotechnology Group, IATA-CSIC, Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain.
| |
Collapse
|
7
|
Nemati F, Ghanati F, Gavlighi HA, Sharifi M. Fructan dynamics and antioxidant capacity of 4-day-old seedlings of wheat (Triticum aestivum) cultivars during drought stress and recovery. FUNCTIONAL PLANT BIOLOGY : FPB 2018; 45:1000-1008. [PMID: 32290999 DOI: 10.1071/fp18008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 03/24/2018] [Indexed: 06/11/2023]
Abstract
One of the inevitable consequences of drought stress is enhanced production of reactive oxygen species (ROS). Fructan might function as effective candidate for capturing ROS in a wide range of stresses. Herein, 4-day-old seedlings of drought-tolerant and -sensitive wheat cultivars were exposed to drought stress for 7 days by water cessation, followed by further 7 days re-watering. The content, metabolism, related enzymes activity, degree of polymerisation (DP) and antioxidant capacity of fructan were compared in the two cultivars. High resolution HPAEC-PAD analysis of fructan showed an increase in the activities of fructan: fructan 1-fructosyltransferase (1-FFT) in the tolerant cultivar and sucrose: sucrose 1-fructosyltransferase (1-SST) and 1-FFT in the sensitive cultivar under drought condition. The activity of fructan exohydrolase (FEH) did not show any significant change in tolerant cultivar, but decreased in a sensitive one. In comparison with the sensitive cultivar, the tolerant one accumulated fructan (0.9% of dry matter) with higher degree of polymerisation (10.67±1.1), accompanied by increased OH radical scavenging activity, during drought condition. In regard to the fact that OH radical is the most prevalent ROS in damaging membrane lipids, the results suggest that fructans play a crucial role in the tolerance of wheat seedlings against drought stress.
Collapse
Affiliation(s)
- Farnoosh Nemati
- Department of Plant Biology, Faculty of Biological Science, Tarbiat Modares University (TMU), POB 14115-154, Tehran, Iran
| | - Faezeh Ghanati
- Department of Plant Biology, Faculty of Biological Science, Tarbiat Modares University (TMU), POB 14115-154, Tehran, Iran
| | - Hassan Ahmadi Gavlighi
- Department of Food Science and Technology, Faculty of Agriculture, Tarbiat Modares University (TMU), POB14115-336, Tehran, Iran
| | - Mohsen Sharifi
- Department of Plant Biology, Faculty of Biological Science, Tarbiat Modares University (TMU), POB 14115-154, Tehran, Iran
| |
Collapse
|
8
|
Luo R, Song X, Li Z, Zhang A, Yan X, Pang Q. Effect of soil salinity on fructan content and polymerization degree in the sprouting tubers of Jerusalem artichoke (Helianthus tuberosus L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 125:27-34. [PMID: 29413628 DOI: 10.1016/j.plaphy.2018.01.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/24/2018] [Accepted: 01/25/2018] [Indexed: 05/07/2023]
Abstract
In addition to their role as reserve carbohydrates, fructans have been recognized as compounds that are protective against adverse environments. The aim of this study was to identify changes in the content and the degree of polymerization (DP) of fructan in sprouting tubers of Jerusalem artichoke under salt stress. Fructan was extracted from tubers at 1, 3, 5, and 7 days after planting in sandy loam soil irrigated with NaCl solution. Fructan accumulation and polymerization and the expression of genes encoding enzymes for fructan synthesis and degradation were evaluated. No significant differences between the control and treatment groups were observed until 5 days after sowing. The highest level of salinity (250 mM) not only inhibited sprouting and root growth but also decreased the level of fructan in the tubers. The proportion of fructan at DP 2-5 rapidly increased one day after sowing and then decreased over time. Under various NaCl treatments, at 7 days after sowing, all fructans except fructan at DP 6-10 were present in proportions less than or equal to the control. The variation in the DP of fructan was related to the transcription level of fructan metabolism genes. Fructan may support sprouting or resistance to salt stress by changing the DP of fructan molecules through hydrolysis without changing the total amount of fructan. The low-molecular-weight oligosaccharides (DP < 5) may be the major carbohydrates that support tuber sprouting or that are involved in protection from salt stress.
Collapse
Affiliation(s)
- Rui Luo
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, People's Republic of China.
| | - Xiaoyang Song
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, People's Republic of China.
| | - Ziwei Li
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, People's Republic of China.
| | - Aiqin Zhang
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, People's Republic of China.
| | - Xiufeng Yan
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, People's Republic of China.
| | - Qiuying Pang
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education, Harbin 150040, People's Republic of China.
| |
Collapse
|
9
|
Singh G, Dhar YV, Asif MH, Misra P. Exploring the functional significance of sterol glycosyltransferase enzymes. Prog Lipid Res 2018; 69:1-10. [DOI: 10.1016/j.plipres.2017.11.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/19/2017] [Accepted: 11/19/2017] [Indexed: 12/22/2022]
|
10
|
Versluys M, Kirtel O, Toksoy Öner E, Van den Ende W. The fructan syndrome: Evolutionary aspects and common themes among plants and microbes. PLANT, CELL & ENVIRONMENT 2018; 41:16-38. [PMID: 28925070 DOI: 10.1111/pce.13070] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 08/30/2017] [Accepted: 09/09/2017] [Indexed: 05/13/2023]
Abstract
Fructans are multifunctional fructose-based water soluble carbohydrates found in all biological kingdoms but not in animals. Most research has focused on plant and microbial fructans and has received a growing interest because of their practical applications. Nevertheless, the origin of fructan production, the so-called "fructan syndrome," is still unknown. Why fructans only occur in a limited number of plant and microbial species remains unclear. In this review, we provide an overview of plant and microbial fructan research with a focus on fructans as an adaptation to the environment and their role in (a)biotic stress tolerance. The taxonomical and biogeographical distribution of fructans in both kingdoms is discussed and linked (where possible) to environmental factors. Overall, the fructan syndrome may be related to water scarcity and differences in physicochemical properties, for instance, water retaining characteristics, at least partially explain why different fructan types with different branching levels are found in different species. Although a close correlation between environmental stresses and fructan production is quite clear in plants, this link seems to be missing in microbes. We hypothesize that this can be at least partially explained by differential evolutionary timeframes for plants and microbes, combined with potential redundancy effects.
Collapse
Affiliation(s)
- Maxime Versluys
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
| | - Onur Kirtel
- Industrial Biotechnology and Systems Biology Research Group, Bioengineering Department, Marmara University, Istanbul, 34722, Turkey
| | - Ebru Toksoy Öner
- Industrial Biotechnology and Systems Biology Research Group, Bioengineering Department, Marmara University, Istanbul, 34722, Turkey
| | - Wim Van den Ende
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
| |
Collapse
|
11
|
Wei H, Zhao H, Su T, Bausewein A, Greiner S, Harms K, Rausch T. Chicory R2R3-MYB transcription factors CiMYB5 and CiMYB3 regulate fructan 1-exohydrolase expression in response to abiotic stress and hormonal cues. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4323-4338. [PMID: 28922763 PMCID: PMC5853547 DOI: 10.1093/jxb/erx210] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 05/31/2017] [Indexed: 05/17/2023]
Abstract
In the biennial Cichorium intybus, inulin-type fructans accumulate in the taproot during the first year. Upon cold or drought exposure, fructans are degraded by fructan exohydrolases, affecting inulin yield and degree of polymerization. While stress-induced expression of 1-FEH genes has been thoroughly explored, the transcriptional network mediating these responses has remained unknown. In this study, several R2R3-MYB transcriptional regulators were analysed for their possible involvement in 1-FEH regulation via transient transactivation of 1-FEH target promoters and for in vivo co-expression with target genes under different stress and hormone treatments. CiMYB3 and CiMYB5 selectively enhanced promoter activities of 1-FEH1, 1-FEH2a, and 1-FEH2b genes, without affecting promoter activities of fructosyltransferase genes. Both factors recognized the MYB-core motifs (C/TNGTTA/G) that are abundantly present in 1-FEH promoters. In chicory hairy root cultures, CiMYB5 displayed co-expression with its target genes in response to different abiotic stress and phytohormone treatments, whereas correlations with CiMYB3 expression were less consistent. Oligofructan levels indicated that the metabolic response, while depending on the balance of the relative expression levels of fructan exohydrolases and fructosyltransferases, could be also affected by differential subcellular localization of different FEH isoforms. The results indicate that in chicory hairy root cultures CiMYB5 and CiMYB3 act as positive regulators of the fructan degradation pathway.
Collapse
Affiliation(s)
- Hongbin Wei
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Hongbo Zhao
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Tao Su
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Anja Bausewein
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Steffen Greiner
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Heidelberg, Germany
| | | | - Thomas Rausch
- Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Heidelberg, Germany
| |
Collapse
|
12
|
Mellado-Mojica E, González de la Vara LE, López MG. Fructan active enzymes (FAZY) activities and biosynthesis of fructooligosaccharides in the vacuoles of Agave tequilana Weber Blue variety plants of different age. PLANTA 2017; 245:265-281. [PMID: 27730409 DOI: 10.1007/s00425-016-2602-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 09/29/2016] [Indexed: 05/28/2023]
Abstract
Biosynthesis of agave fructans occurs in mesontle vacuoles which showed fluctuations in FAZY activities and synthesized a diverse spectrum of fructooligosaccharide isomers. Agave tequilana Weber Blue variety is an important agronomic crop in Mexico. Fructan metabolism in A. tequilana exhibits changes in fructan content, type, degree of polymerization (DP), and molecular structure. Specific activities of vacuolar fructan active enzymes (FAZY) in A. tequilana plants of different age and the biosynthesis of fructooligosaccharides (FOSs) were analyzed in this work. Vacuoles from mesontle (stem) protoplasts were isolated and collected from 2- to 7-year-old plants. For the first time, agave fructans were identified in the vacuolar content by HPAEC-PAD. Several FAZY activities (1-SST, 6-SFT, 6G-FFT, 1-FFT, and FEH) with fluctuations according to the plant age were found in protein vacuolar extracts. Among vacuolar FAZY, 1-SST activities appeared in all plant developmental stages, as well as 1-FFT and FEH activities. The enzymes 6G-FFT and 6-SST showed only minimal activities. Lowest and highest FAZY activities were found in 2- and 6-year-old plants, respectively. Synthesized products (FOS) were analyzed by TLC and HPAEC-PAD. Vacuolar FAZYs yielded large FOS isomers diversity, being 7-year-old plants the ones that synthesized a greater variety of fructans with different DP, linkages, and molecular structures. Based on the above, we are proposing a model for the FAZY activities constituting the FOS biosynthetic pathways in Agave tequilana Weber Blue variety.
Collapse
Affiliation(s)
- Erika Mellado-Mojica
- Departamento de Biotecnología y Bioquímica, Centro de Investigación y de Estudios Avanzados del IPN, Unidad Irapuato. Km. 9.6 Lib. Norte Carretera Irapuato-León, Apartado Postal 629, 36821, Irapuato, Gto, Mexico
| | - Luis E González de la Vara
- Departamento de Biotecnología y Bioquímica, Centro de Investigación y de Estudios Avanzados del IPN, Unidad Irapuato. Km. 9.6 Lib. Norte Carretera Irapuato-León, Apartado Postal 629, 36821, Irapuato, Gto, Mexico
| | - Mercedes G López
- Departamento de Biotecnología y Bioquímica, Centro de Investigación y de Estudios Avanzados del IPN, Unidad Irapuato. Km. 9.6 Lib. Norte Carretera Irapuato-León, Apartado Postal 629, 36821, Irapuato, Gto, Mexico.
| |
Collapse
|
13
|
Terkmane N, Krea M, Moulai-Mostefa N. Optimisation of inulin extraction from globe artichoke (Cynara cardunculusL. subsp.scolymus(L.) Hegi.) by electromagnetic induction heating process. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13167] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Naila Terkmane
- Materials and Environment Laboratory; Faculty of Science and Technology; University of Medea; Ain D'Heb 26001 Medea Algeria
| | - Mohamed Krea
- Materials and Environment Laboratory; Faculty of Science and Technology; University of Medea; Ain D'Heb 26001 Medea Algeria
| | - Nadji Moulai-Mostefa
- Materials and Environment Laboratory; Faculty of Science and Technology; University of Medea; Ain D'Heb 26001 Medea Algeria
- Laboratoire Polymères Biopolymères Surfaces; Université de Rouen; Mont Saint Aignan 76821 France
| |
Collapse
|
14
|
Singh G, Tiwari M, Singh SP, Singh S, Trivedi PK, Misra P. Silencing of sterol glycosyltransferases modulates the withanolide biosynthesis and leads to compromised basal immunity of Withania somnifera. Sci Rep 2016; 6:25562. [PMID: 27146059 PMCID: PMC4857139 DOI: 10.1038/srep25562] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 03/22/2016] [Indexed: 11/10/2022] Open
Abstract
Sterol glycosyltransferases (SGTs) catalyse transfer of glycon moiety to sterols and their related compounds to produce diverse glyco-conjugates or steryl glycosides with different biological and pharmacological activities. Functional studies of SGTs from Withania somnifera indicated their role in abiotic stresses but details about role under biotic stress are still unknown. Here, we have elucidated the function of SGTs by silencing SGTL1, SGTL2 and SGTL4 in Withania somnifera. Down-regulation of SGTs by artificial miRNAs led to the enhanced accumulation of withanolide A, withaferin A, sitosterol, stigmasterol and decreased content of withanoside V in Virus Induced Gene Silencing (VIGS) lines. This was further correlated with increased expression of WsHMGR, WsDXR, WsFPPS, WsCYP710A1, WsSTE1 and WsDWF5 genes, involved in withanolide biosynthesis. These variations of withanolide concentrations in silenced lines resulted in pathogen susceptibility as compared to control plants. The infection of Alternaria alternata causes increased salicylic acid, callose deposition, superoxide dismutase and H2O2 in aMIR-VIGS lines. The expression of biotic stress related genes, namely, WsPR1, WsDFS, WsSPI and WsPR10 were also enhanced in aMIR-VIGS lines in time dependent manner. Taken together, our observations revealed that a positive feedback regulation of withanolide biosynthesis occurred by silencing of SGTLs which resulted in reduced biotic tolerance.
Collapse
Affiliation(s)
- Gaurav Singh
- Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, Uttar Pradesh, India.,Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Manish Tiwari
- Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, Uttar Pradesh, India
| | - Surendra Pratap Singh
- Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, Uttar Pradesh, India
| | - Surendra Singh
- Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Prabodh Kumar Trivedi
- Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, Uttar Pradesh, India
| | - Pratibha Misra
- Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, Uttar Pradesh, India
| |
Collapse
|
15
|
Dong Y, Zhang Y, Xiao Y, Yan J, Liu J, Wen W, Zhang Y, Jing R, Xia X, He Z. Cloning of TaSST genes associated with water soluble carbohydrate content in bread wheat stems and development of a functional marker. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2016; 129:1061-70. [PMID: 26883047 DOI: 10.1007/s00122-016-2683-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 01/23/2016] [Indexed: 05/21/2023]
Abstract
We cloned TaSST genes, developed a gene-specific marker for TaSST-D1, and identified three QTL in the Doumai/Shi 4185 RIL population. TaSST-D1 is within one of the three QTL. Sucrose:sucrose-1-fructosyltransferase (1-SST), a critical enzyme in the fructan biosynthetic pathway, is significantly and positively associated with water soluble carbohydrate (WSC) content in bread wheat stems. In the present study, wheat 1-SST genes (TaSST) were isolated and located on chromosomes 4A, 7A and 7D. Sequence analysis of TaSST-D1 revealed 15 single nucleotide polymorphisms (SNP) in the third exon between cultivars with higher and lower WSC content. A cleaved amplified polymorphism sequence (CAPS) marker, WSC7D, based on the polymorphism at position 1216 (C-G) was developed to discriminate the two alleles. WSC7D was located on chromosome 7DS using a recombinant inbred line (RIL) population from a Doumai/Shi 4185 cross, and a set of Chinese Spring nullisomic-tetrasomic lines. TaSST-D1 co-segregated with the CAPS marker WSC7D and was linked to SNP marker BS00108793_51 on chromosome 7DS at a genetic distance of 6.1 cM. It explained 8.8, 10.9, and 11.3% of the phenotypic variances in trials at Beijing and Shijiazhuang as well as the averaged data from those environments, respectively. Two additional QTL (QWSC.caas-4BS and QWSC.caas-7AS) besides TaSST-D1 were mapped in the RIL population. One hundred and forty-nine Chinese wheat cultivars and advanced lines tested in four environments were used to validate a highly significant (P < 0.01) association between WSC7D and WSC content in wheat stems. WSC7D can be used as a gene-specific marker for improvement of stem WSC content in wheat breeding programs.
Collapse
Affiliation(s)
- Yan Dong
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
| | - Yan Zhang
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
| | - Yonggui Xiao
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
| | - Jun Yan
- Cotton Research Institute, CAAS, Huanghedadao, Anyang, Henan, China
| | - Jindong Liu
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
| | - Weie Wen
- College of Agronomy, Xinjiang Agricultural University, 311 Nongda East Road, 830052, Urumqi, Xinjiang, China
| | - Yong Zhang
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
| | - Ruilian Jing
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
| | - Xianchun Xia
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China.
| | - Zhonghu He
- National Wheat Improvement Center, Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, 100081, Beijing, China
- International Maize and Wheat Improvement Center (CIMMYT) China Office, c/o CAAS, 12 Zhongguancun South Street, 100081, Beijing, China
| |
Collapse
|
16
|
Xu H, Liang M, Xu L, Li H, Zhang X, Kang J, Zhao Q, Zhao H. Cloning and functional characterization of two abiotic stress-responsive Jerusalem artichoke (Helianthus tuberosus) fructan 1-exohydrolases (1-FEHs). PLANT MOLECULAR BIOLOGY 2015; 87:81-98. [PMID: 25522837 DOI: 10.1007/s11103-014-0262-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 10/15/2014] [Indexed: 05/07/2023]
Abstract
Two fructan hydrolases were previously reported to exist in Jerusalem artichoke (Helianthus tuberosus) and one native fructan-β-fructosidase (1-FEH) was purified to homogeneity by SDS-PAGE, but no corresponding cDNA was cloned. Here, we cloned two full-length 1-FEH cDNA sequences from Jerusalem artichoke, named Ht1-FEH I and Ht1-FEH II, which showed high levels of identity with chicory 1-FEH I and 1-FEH II. Functional characterization of the corresponding recombinant proteins in Pichia pastoris X-33 demonstrated that both Ht1-FEHs had high levels of hydrolase activity towards β(2,1)-linked fructans, but low or no activity towards β(2,6)-linked levan and sucrose. Like other plant FEHs, the activities of the recombinant Ht1-FEHs were greatly inhibited by sucrose. Real-time quantitative PCR analysis showed that Ht1-FEH I transcripts accumulated to high levels in the developing leaves and stems of artichoke, whereas the expression levels of Ht1-FEH II increased in tubers during tuber sprouting, which implies that the two Ht1-FEHs play different roles. The levels of both Ht1-FEH I and II transcript were significantly increased in the stems of NaCl-treated plants. NaCl treatment also induced transcription of both Ht1-FEHs in the tubers, while PEG treatments slightly inhibited the expression of Ht1-FEH II in tubers. Analysis of sugar-metabolizing enzyme activities and carbohydrate concentration via HPLC showed that the enzyme activities of 1-FEHs were increased but the fructose content was decreased under NaCl and PEG treatments. Given that FEH hydrolyzes fructan to yield Fru, we discuss possible explanations for the inconsistency between 1-FEH activity and fructan dynamics in artichokes subjected to abiotic stress.
Collapse
Affiliation(s)
- Huanhuan Xu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Tongwei Road 6, Xuanwu District, Nanjing, 210095, Jiangsu Province, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Knez M, Abbott C, Stangoulis JCR. Changes in the content of fructans and arabinoxylans during baking processes of leavened and unleavened breads. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2273-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
18
|
Kooiker M, Drenth J, Glassop D, McIntyre CL, Xue GP. TaMYB13-1, a R2R3 MYB transcription factor, regulates the fructan synthetic pathway and contributes to enhanced fructan accumulation in bread wheat. JOURNAL OF EXPERIMENTAL BOTANY 2013; 64:3681-96. [PMID: 23873993 PMCID: PMC3745729 DOI: 10.1093/jxb/ert205] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Fructans are the major component of temporary carbon reserve in the stem of temperate cereals, which is used for grain filling. Three families of fructosyltransferases are directly involved in fructan synthesis in the vacuole of Triticum aestivum. The regulatory network of the fructan synthetic pathway is largely unknown. Recently, a sucrose-upregulated wheat MYB transcription factor (TaMYB13-1) was shown to be capable of activating the promoter activities of sucrose:sucrose 1-fructosyltransferase (1-SST) and sucrose:fructan 6-fructosyltransferase (6-SFT) in transient transactivation assays. This work investigated TaMYB13-1 target genes and their influence on fructan synthesis in transgenic wheat. TaMYB13-1 overexpression resulted in upregulation of all three families of fructosyltransferases including fructan:fructan 1-fructosyltransferase (1-FFT). A γ-vacuolar processing enzyme (γ-VPE1), potentially involved in processing the maturation of fructosyltransferases in the vacuole, was also upregulated by TaMYB13-1 overexpression. Multiple TaMYB13 DNA-binding motifs were identified in the Ta1-FFT1 and Taγ-VPE1 promoters and were bound strongly by TaMYB13-1. The expression profiles of these target genes and TaMYB13-1 were highly correlated in recombinant inbred lines and during stem development as well as the transgenic and non-transgenic wheat dataset, further supporting a direct regulation of these genes by TaMYB13-1. TaMYB13-1 overexpression in wheat led to enhanced fructan accumulation in the leaves and stems and also increased spike weight and grain weight per spike in transgenic plants under water-limited conditions. These data suggest that TaMYB13-1 plays an important role in coordinated upregulation of genes necessary for fructan synthesis and can be used as a molecular tool to improve the high fructan trait.
Collapse
Affiliation(s)
- Maarten Kooiker
- CSIRO Plant Industry, 306 Carmody Rd., St Lucia, Brisbane, Qld 4067, Australia
| | - Janneke Drenth
- CSIRO Plant Industry, 306 Carmody Rd., St Lucia, Brisbane, Qld 4067, Australia
| | - Donna Glassop
- CSIRO Plant Industry, 306 Carmody Rd., St Lucia, Brisbane, Qld 4067, Australia
| | - C. Lynne McIntyre
- CSIRO Plant Industry, 306 Carmody Rd., St Lucia, Brisbane, Qld 4067, Australia
| | - Gang-Ping Xue
- CSIRO Plant Industry, 306 Carmody Rd., St Lucia, Brisbane, Qld 4067, Australia
| |
Collapse
|
19
|
Morandini P. Control limits for accumulation of plant metabolites: brute force is no substitute for understanding. PLANT BIOTECHNOLOGY JOURNAL 2013; 11:253-267. [PMID: 23301840 DOI: 10.1111/pbi.12035] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 11/13/2012] [Accepted: 11/19/2012] [Indexed: 06/01/2023]
Abstract
Which factors limit metabolite accumulation in plant cells? Are theories on flux control effective at explaining the results? Many biotechnologists cling to the idea that every pathway has a rate limiting enzyme and target such enzymes first in order to modulate fluxes. This often translates into large effects on metabolite concentration, but disappointing small increases in flux. Rate limiting enzymes do exist, but are rare and quite opposite to what predicted by biochemistry. In many cases however, flux control is shared among many enzymes. Flux control and concentration control can (and must) be distinguished and quantified for effective manipulation. Flux control for several 'building blocks' of metabolism is placed on the demand side, and therefore increasing demand can be very successful. Tampering with supply, particularly desensitizing supply enzymes, is usually not very effective, if not dangerous, because supply regulatory mechanisms function to control metabolite homeostasis. Some important, but usually unnoticed, metabolic constraints shape the responses of metabolic systems to manipulation: mass conservation, cellular resource allocation and, most prominently, energy supply, particularly in heterotrophic tissues. The theoretical basis for this view shall be explored with recent examples gathered from the manipulation of several metabolites (vitamins, carotenoids, amino acids, sugars, fatty acids, polyhydroxyalkanoates, fructans and sugar alcohols). Some guiding principles are suggested for an even more successful engineering of plant metabolism.
Collapse
Affiliation(s)
- Piero Morandini
- Department of Biosciences, University of Milan and CNR Institute of Biophysics, Milan, Italy.
| |
Collapse
|
20
|
Mellado-Mojica E, López MG. Fructan metabolism in A. tequilana Weber Blue variety along its developmental cycle in the field. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:11704-13. [PMID: 23072425 DOI: 10.1021/jf303332n] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Fructan, as reserve carbohydrate, supplies energy needs during vegetative development, thereby exhibiting variations in its content and composition. Fructan metabolism in Agave tequilana Blue variety from 2- to 7-year-old plants was analyzed in this work. Soluble carbohydrates were determined at all ages. Fructan (328-711 mg/g), sucrose (14-39 mg/g), fructose (11-20 mg/g), glucose (4-14 mg/g), and starch (0.58-4.98 mg/g) were the most abundant carbohydrates. Thin-layer chromatography exhibited that 2-5-year-old plants mainly stored fructooligosaccharides, while 6-7-year-old plants mainly contained long-chain fructans. The fructan degree of polymerization (DP) increased from 6 to 23 throughout plant development. The 7-year-old plants mainly stored highly branched agavins. Partially methylated alditol acetate analyzed by gas chromatography-mass spectrometry reveals that fructan molecular structures became more complex with plant age. For the first time, we report the presence of a large number of DP3 (seven forms), DP4 (eight forms), and DP5 (six forms) isomers for agave fructans. Overall, fructan metabolism in A. tequilana displays changes in its soluble carbohydrates, DP, type, and fructan structures stored, along its developmental cycle in the field.
Collapse
Affiliation(s)
- Erika Mellado-Mojica
- Departamento de Biotecnología y Bioquímica, Centro de Investigación y de Estudios Avanzados del IPN, Unidad Irapuato, Apartado Postal 629, Irapuato, Guanajuato 36821, Mexico
| | | |
Collapse
|
21
|
Michel-Cuello C, Ortiz-Cerda I, Moreno-Vilet L, Grajales-Lagunes A, Moscosa-Santillán M, Bonnin J, González-Chávez MM, Ruiz-Cabrera M. Study of enzymatic hydrolysis of fructans from Agave salmiana characterization and kinetic assessment. ScientificWorldJournal 2012; 2012:863432. [PMID: 22629216 PMCID: PMC3354743 DOI: 10.1100/2012/863432] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Accepted: 01/18/2012] [Indexed: 12/30/2022] Open
Abstract
Fructans were extracted from Agave salmiana juice, characterized and subjected to hydrolysis process using a commercial inulinase preparation acting freely. To compare the performance of the enzymatic preparation, a batch of experiments were also conducted with chicory inulin (reference). Hydrolysis was performed for 6 h at two temperatures (50, 60 °C) and two substrate concentrations (40, 60 mg/ml). Hydrolysis process was monitored by measuring the sugars released and residual substrate by HPLC. A mathematical model which describes the kinetics of substrate degradation as well as fructose production was proposed to analyze the hydrolysis assessment. It was found that kinetics were significantly influenced by temperature, substrate concentration, and type of substrate (P < 0.01). The extent of substrate hydrolysis varied from 82 to 99%. Hydrolysis product was mainly constituted of fructose, obtaining from 77 to 96.4% of total reducing sugars.
Collapse
Affiliation(s)
- Christian Michel-Cuello
- Programa Multidisciplinario de Posgrado en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Avenida Dr Manuel Nava No 6, Zona Universitaria, 78210 San Luis Potosí, Mexico
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Chatterjee A, Bhattacharya H, Kandwal A. Probiotics in periodontal health and disease. J Indian Soc Periodontol 2011; 15:23-8. [PMID: 21772717 PMCID: PMC3134041 DOI: 10.4103/0972-124x.82260] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2009] [Accepted: 08/23/2010] [Indexed: 11/30/2022] Open
Abstract
Macfarlane Burnett stated in 1962 that “By the late twentieth century, we can anticipate the virtual elimination of infectious diseases as a significant factor in social life”. Probiotics have become of interest to researchers in recent times. Time has come to shift the paradigm of treatment from specific bacteria elimination to altering bacterial ecology by probiotics. The development of resistance to a range of antibiotics by some important pathogens has raised the possibility of a return to the pre-antibiotic dark ages. Here, probiotics provide an effective alternative way, which is economical and natural to combat periodontal disease. Thus, a mere change in diet by including probiotic foods may halt, retard, or even significantly delay the pathogenesis of periodontal diseases, promoting a healthy lifestyle to fight periodontal infections.
Collapse
Affiliation(s)
- Anirban Chatterjee
- Department of Periodontics, Institute of Dental Sciences, Bareilly, Uttar Pradesh, India
| | | | | |
Collapse
|
23
|
Yıldız S. The Metabolism of Fructooligosaccharides and Fructooligosaccharide-Related Compounds in Plants. FOOD REVIEWS INTERNATIONAL 2010. [DOI: 10.1080/87559129.2010.518295] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- S. Yıldız
- a Süleyman Demirel University, Chemical Engineering Department , Çünür , Isparta , Turkey
| |
Collapse
|
24
|
Chuankhayan P, Hsieh CY, Huang YC, Hsieh YY, Guan HH, Hsieh YC, Tien YC, Chen CD, Chiang CM, Chen CJ. Crystal structures of Aspergillus japonicus fructosyltransferase complex with donor/acceptor substrates reveal complete subsites in the active site for catalysis. J Biol Chem 2010; 285:23251-64. [PMID: 20466731 DOI: 10.1074/jbc.m110.113027] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Fructosyltransferases catalyze the transfer of a fructose unit from one sucrose/fructan to another and are engaged in the production of fructooligosaccharide/fructan. The enzymes belong to the glycoside hydrolase family 32 (GH32) with a retaining catalytic mechanism. Here we describe the crystal structures of recombinant fructosyltransferase (AjFT) from Aspergillus japonicus CB05 and its mutant D191A complexes with various donor/acceptor substrates, including sucrose, 1-kestose, nystose, and raffinose. This is the first structure of fructosyltransferase of the GH32 with a high transfructosylation activity. The structure of AjFT comprises two domains with an N-terminal catalytic domain containing a five-blade beta-propeller fold linked to a C-terminal beta-sandwich domain. Structures of various mutant AjFT-substrate complexes reveal complete four substrate-binding subsites (-1 to +3) in the catalytic pocket with shapes and characters distinct from those of clan GH-J enzymes. Residues Asp-60, Asp-191, and Glu-292 that are proposed for nucleophile, transition-state stabilizer, and general acid/base catalyst, respectively, govern the binding of the terminal fructose at the -1 subsite and the catalytic reaction. Mutants D60A, D191A, and E292A completely lost their activities. Residues Ile-143, Arg-190, Glu-292, Glu-318, and His-332 combine the hydrophobic Phe-118 and Tyr-369 to define the +1 subsite for its preference of fructosyl and glucosyl moieties. Ile-143 and Gln-327 define the +2 subsite for raffinose, whereas Tyr-404 and Glu-405 define the +2 and +3 subsites for inulin-type substrates with higher structural flexibilities. Structural geometries of 1-kestose, nystose and raffinose are different from previous data. All results shed light on the catalytic mechanism and substrate recognition of AjFT and other clan GH-J fructosyltransferases.
Collapse
Affiliation(s)
- Phimonphan Chuankhayan
- Life Science Group, Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Cloning and Characterization of Genes Coding for Fructan Biosynthesis Enzymes (FBEs) in Triticeae Plants. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/s1671-2927(09)60099-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
26
|
Ritsema T, Brodmann D, Diks SH, Bos CL, Nagaraj V, Pieterse CM, Boller T, Wiemken A, Peppelenbosch MP. Are small GTPases signal hubs in sugar-mediated induction of fructan biosynthesis? PLoS One 2009; 4:e6605. [PMID: 19672308 PMCID: PMC2720452 DOI: 10.1371/journal.pone.0006605] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Accepted: 06/20/2009] [Indexed: 11/19/2022] Open
Abstract
External sugar initiates biosynthesis of the reserve carbohydrate fructan, but the molecular processes mediating this response remain obscure. Previously it was shown that a phosphatase and a general kinase inhibitor hamper fructan accumulation. We use various phosphorylation inhibitors both in barley and in Arabidopsis and show that the expression of fructan biosynthetic genes is dependent on PP2A and different kinases such as Tyr-kinases and PI3-kinases. To further characterize the phosphorylation events involved, comprehensive analysis of kinase activities in the cell was performed using a PepChip, an array of >1000 kinase consensus substrate peptide substrates spotted on a chip. Comparison of kinase activities in sugar-stimulated and mock(sorbitol)-treated Arabidopsis demonstrates the altered phosphorylation of many consensus substrates and documents the differences in plant kinase activity upon sucrose feeding. The different phosphorylation profiles obtained are consistent with sugar-mediated alterations in Tyr phosphorylation, cell cycling, and phosphoinositide signaling, and indicate cytoskeletal rearrangements. The results lead us to infer a central role for small GTPases in sugar signaling.
Collapse
Affiliation(s)
- Tita Ritsema
- Botanisches Institut der Universität Basel, Zurich Basel Plant Science Center, Basel, Switzerland
- Plant-Microbe interactions, Institute of Environmental Biology, Utrecht University, Utrecht, The Netherlands
| | - David Brodmann
- Botanisches Institut der Universität Basel, Zurich Basel Plant Science Center, Basel, Switzerland
| | - Sander H. Diks
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Carina L. Bos
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Vinay Nagaraj
- Botanisches Institut der Universität Basel, Zurich Basel Plant Science Center, Basel, Switzerland
| | - Corné M.J. Pieterse
- Plant-Microbe interactions, Institute of Environmental Biology, Utrecht University, Utrecht, The Netherlands
| | - Thomas Boller
- Botanisches Institut der Universität Basel, Zurich Basel Plant Science Center, Basel, Switzerland
| | - Andres Wiemken
- Botanisches Institut der Universität Basel, Zurich Basel Plant Science Center, Basel, Switzerland
| | - Maikel P. Peppelenbosch
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- * E-mail:
| |
Collapse
|
27
|
Goosen C, Van Der Maarel MJEC, Dijkhuizen L. Exo-inulinase ofAspergillus nigerN402: A hydrolytic enzyme with significant transfructosylating activity. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420701806686] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
28
|
Livingston DP, Hincha DK, Heyer AG. Fructan and its relationship to abiotic stress tolerance in plants. Cell Mol Life Sci 2009; 66:2007-23. [PMID: 19290476 PMCID: PMC2705711 DOI: 10.1007/s00018-009-0002-x] [Citation(s) in RCA: 194] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Accepted: 02/04/2009] [Indexed: 01/24/2023]
Abstract
Numerous studies have been published that attempted to correlate fructan concentrations with freezing and drought tolerance. Studies investigating the effect of fructan on liposomes indicated that a direct interaction between membranes and fructan was possible. This new area of research began to move fructan and its association with stress beyond mere correlation by confirming that fructan has the capacity to stabilize membranes during drying by inserting at least part of the polysaccharide into the lipid headgroup region of the membrane. This helps prevent leakage when water is removed from the system either during freezing or drought. When plants were transformed with the ability to synthesize fructan, a concomitant increase in drought and/or freezing tolerance was confirmed. These experiments indicate that besides an indirect effect of supplying tissues with hexose sugars, fructan has a direct protective effect that can be demonstrated by both model systems and genetic transformation.
Collapse
Affiliation(s)
- David P Livingston
- USDA and North Carolina State University, 840 Method Road, Unit 3, Raleigh, NC 27695, USA.
| | | | | |
Collapse
|
29
|
Velázquez-Hernández M, Baizabal-Aguirre V, Bravo-Patiño A, Cajero-Juárez M, Chávez-Moctezuma M, Valdez-Alarcón J. Microbial fructosyltransferases and the role of fructans. J Appl Microbiol 2009; 106:1763-78. [DOI: 10.1111/j.1365-2672.2008.04120.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
30
|
Chen TH, Huang YC, Yang CS, Yang CC, Wang AY, Sung HY. Insights into the catalytic properties of bamboo vacuolar invertase through mutational analysis of active site residues. PHYTOCHEMISTRY 2009; 70:25-31. [PMID: 19010503 DOI: 10.1016/j.phytochem.2008.10.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2008] [Revised: 09/27/2008] [Accepted: 10/05/2008] [Indexed: 05/04/2023]
Abstract
Plant acid invertases, which are either associated with the cell wall or present in vacuoles, belong to family 32 of glycoside hydrolases (GH32). Homology modeling of bamboo vacuolar invertase Bobetafruct3 using Arabidopsis cell-wall invertase AtcwINV1 as a template showed that its overall structure is similar to GH32 enzymes, and that the three highly conserved motifs, NDPNG, RDP and EC, are located in the active site. This study also used site-directed mutagenesis to examine the roles of the conserved amino acid residues in these three motifs, which include Asp135, Arg259, Asp260, Glu316 and Cys317, and a conserved Trp residue (Trp159) that resides between the NDPNG and RDP motifs. The mutants W159F, W159L, E316Q and C317A retained acid invertase activity, but no invertase activity was observed for the mutant E316A or mutants with changes at Asp135, Arg259, or Asp260. The apparent K(m) values of the four mutants with invertase activity were all higher than that of the wild-type enzyme. The mutants W159L and E316Q exhibited lower k(cat) values than the wild-type enzyme, but an increase in the k(cat) value was observed for the mutants W159F and C317A. The results of this study demonstrate that these residues have individual functions in catalyzing sucrose hydrolysis.
Collapse
Affiliation(s)
- Tai-Hung Chen
- Institute of Microbiology and Biochemistry and Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan
| | | | | | | | | | | |
Collapse
|
31
|
|
32
|
van Beilen JB, Poirier Y. Production of renewable polymers from crop plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2008; 54:684-701. [PMID: 18476872 DOI: 10.1111/j.1365-313x.2008.03431.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Plants produce a range of biopolymers for purposes such as maintenance of structural integrity, carbon storage, and defense against pathogens and desiccation. Several of these natural polymers are used by humans as food and materials, and increasingly as an energy carrier. In this review, we focus on plant biopolymers that are used as materials in bulk applications, such as plastics and elastomers, in the context of depleting resources and climate change, and consider technical and scientific bottlenecks in the production of novel or improved materials in transgenic or alternative crop plants. The biopolymers discussed are natural rubber and several polymers that are not naturally produced in plants, such as polyhydroxyalkanoates, fibrous proteins and poly-amino acids. In addition, monomers or precursors for the chemical synthesis of biopolymers, such as 4-hydroxybenzoate, itaconic acid, fructose and sorbitol, are discussed briefly.
Collapse
Affiliation(s)
- Jan B van Beilen
- Département de Biologie Moléculaire Végétale, Université de Lausanne, CH-1015 Lausanne, Switzerland
| | | |
Collapse
|
33
|
Hsieh CW, Liu LK, Yeh SH, Chen CF, Lin HI, Sung HY, Wang AY. Molecular cloning and functional identification of invertase isozymes from green bamboo Bambusa oldhamii. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:3101-7. [PMID: 16608237 DOI: 10.1021/jf052711s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Three Bo beta fruct cDNAs encoding acid invertases were cloned from shoots of the green bamboo Bambusa oldhamii. On the basis of the amino acid sequences of their products and phylogenetic analyses, Bo beta fruct1 and Bo beta fruct2 were determined to encode cell wall invertases, whereas Bo beta fruct3encodes a vacuolar invertase. The recombinant proteins encoded by Bo beta fruct2 and Bo beta fruct3 were produced in Pichia pastoris and purified to near homogeneity using ammonium sulfate fractionation and immobilized metal affinity chromatography. The pH optima, pI values, and substrate specificities of the isolated enzymes were consistent with those of plant cell wall or vacuolar invertases. The growth-dependent expression of Bo beta fruct1 and Bo beta fruct2 in the base regions of shoots underscores their roles in sucrose unloading and providing substrates for shoot growth. Its high sucrose affinity suggests that the Bo beta fruct2-encoded enzyme is important for maintaining the sucrose gradient between source and sink organs, while the predominant expression of Bo beta fruct3 in regions of active cell differentiation and expansion suggests functions in osmoregulation and cell enlargement.
Collapse
Affiliation(s)
- Chang-Wen Hsieh
- Institute of Microbiology and Biochemistry, National Taiwan University, Taipei 106, Taiwan
| | | | | | | | | | | | | |
Collapse
|
34
|
Chalmers J, Lidgett A, Cummings N, Cao Y, Forster J, Spangenberg G. Molecular genetics of fructan metabolism in perennial ryegrass. PLANT BIOTECHNOLOGY JOURNAL 2005; 3:459-74. [PMID: 17173633 DOI: 10.1111/j.1467-7652.2005.00148.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Fructans are the main storage carbohydrates of temperate grasses, sustaining regrowth immediately after defoliation, as well as contributing to the nutritive value of feed. Fructan metabolism is based on the substrate sucrose and involves fructosyltransferases (FTs) for biosynthesis and fructan exohydrolases (FEHs) for degradation. Sucrose is also utilized by invertases (INVs), which hydrolyse it into its constituent monosaccharides for use in metabolism. The isolation, molecular characterization, functional analysis, and phylogenetic relationships of genes encoding FTs, FEHs, and INVs from temperate grasses are reviewed, with an emphasis on perennial ryegrass (Lolium perenne L.). The roles these enzymes play in fructan accumulation and remobilization, and future biotechnological applications in molecular plant breeding are discussed.
Collapse
Affiliation(s)
- Jaye Chalmers
- Plant Biotechnology Centre, Primary Industries Research Victoria, Department of Primary Industries and Molecular Plant Breeding CRC, La Trobe University, Victoria 3086, Australia
| | | | | | | | | | | |
Collapse
|
35
|
Wang LT, Wang AY, Hsieh CW, Chen CY, Sung HY. Vacuolar invertases in sweet potato: molecular cloning, characterization, and analysis of gene expression. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2005; 53:3672-3678. [PMID: 15853418 DOI: 10.1021/jf0480851] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Two cDNAs (Ib beta fruct2 and Ib beta fruct3) encoding vacuolar invertases were cloned from sweet potato leaves, expressed in Pichia pastoris, and the recombinant proteins were purified by ammonium sulfate fractionation and chromatography on Ni-NTA agarose. The deduced amino acid sequences encoded by the cDNAs contained characteristic conserved elements of vacuolar invertases, including the sequence R[G/A/P]xxxGVS[E/D/M]K[S/T/A/R], located in the prepeptide region, Wxxx[M/I/V]LxWQ, located around the starting site of the mature protein, and an intact beta-fructosidase motif. The pH optimum, the substrate specificity, and the apparent K(m) values for sucrose exhibited by the recombinant proteins were similar to those of vacuolar invertases purified from sweet potato leaves and cell suspensions, thus confirming that the proteins encoded by Ib beta fruct2 and Ib beta fruct3 are vacuolar invertases. Moreover, northern analysis revealed that the expression of the two genes was differentially regulated. With the exception of mature leaves and sprouting storage roots, Ib beta fruct2 mRNA is widely expressed among the tissues of the sweet potato and is more abundant in young sink tissues. By contrast, Ib beta fruct3 mRNA was only detected in shoots and in young and mature leaves. It appears, therefore, that these two vacuolar invertases play different physiological roles during the development of the sweet potato plant.
Collapse
Affiliation(s)
- Li-Ting Wang
- Institute of Microbiology and Biochemistry, National Taiwan University, Taipei 106, Taiwan
| | | | | | | | | |
Collapse
|
36
|
Ritsema T, Verhaar A, Vijin I, Smeekens S. Fructosyltransferase mutants specify a function for the beta-fructosidase motif of the sucrose-binding box in specifying the fructan type synthesized. PLANT MOLECULAR BIOLOGY 2004; 54:853-63. [PMID: 15604656 DOI: 10.1007/s11103-004-0276-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The onion fructosyltransferase fructan:fructan 6G-fructosyltransferase (6G-FFT) synthesizes fructans of the inulin neo-series using 1-kestose as a substrate. 6G-FFT couples a fructosyl residue to either the terminal glucose via a beta (2-6) linkage or a terminal fructose via a beta (2-1) linkage. The sucrose-binding box is present at the N-terminus of invertases and fructosyltransferases. We tested its function by producing swaps of the first 36 amino acids of 6G-FFT with that of onion sucrose:sucrose 1-fructosyltransferase (1-SST) (SST-GFT) and vacuolar invertase (INV-GFT). In contrast to 6G-FFT, invertase and 1-SST are able to utilize sucrose as their only substrate. The chimerical enzymes were unable to use sucrose, but were active when incubated with 1-kestose. INV-GFT synthesized a similar array of fructans as 6G-FFT, in contrast, SST-GFT showed a dramatic shift in activity towards synthesis of beta (2-1) linkages. Thus the region containing the sucrose-binding box is directing the fructan type synthesized. In invertases, the beta -fructosidase motif, which is part of the sucrose-binding box, consists of NDPNG/A. This motif is variable in fructosyltransferases and consists of NDPSG in 6G-FFT and ADPNA in 1-SST of onion. We studied the importance of the 6G-FFT beta -fructosidase motif using mutants S87N (NDPNG) and N84A;S87N (ADPNG). S87N has 6G-FFT activity, whereas N84A;S87N has a activity that was shifted towards synthesis of beta (2-1) linkages. This is in agreement with the observed activities of the chimerical proteins and indicates that the beta -fructosidase motif of the sucrose-binding box is specifying the fructan type synthesized.
Collapse
Affiliation(s)
- Tita Ritsema
- Department of Molecular Plant Physiology, University Utrecht, Padualaan 8, CH, The Netherlands.
| | | | | | | |
Collapse
|
37
|
Nagaraj VJ, Altenbach D, Galati V, Lüscher M, Meyer AD, Boller T, Wiemken A. Distinct regulation of sucrose: sucrose-1-fructosyltransferase (1-SST) and sucrose: fructan-6-fructosyltransferase (6-SFT), the key enzymes of fructan synthesis in barley leaves: 1-SST as the pacemaker. THE NEW PHYTOLOGIST 2004; 161:735-748. [PMID: 33873712 DOI: 10.1111/j.1469-8137.2004.00995.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
• Previously we have cloned sucrose: fructan-6-fructosyltransferase (6-SFT) from barley (Hordeum vulgare) and proposed that synthesis of fructans in grasses depends on the concerted action of two main enzymes: sucrose: sucrose-1-fructosyltransferase (1-SST), as in other fructan producing plants, and 6-SFT, found only in grasses. • Here we report the cloning of barley 1-SST, verifying the activity of the encoded protein by expression in Pichia pastoris. As expected, the barley 1-SST is homologous to invertases and fructosyltransferases, and in particular to barley 6-SFT. • The gene expression pattern of 1-SST and 6-SFT, along with the corresponding enzyme activities and fructan levels, were investigated in excised barley leaves subjected to a light-dark regime known to sequentially induce fructan accumulation and mobilization. The turnover of transcripts and enzyme activities of 1-SST and 6-SFT was compared, using appropriate inhibitors. • We found the 1-SST transcripts and enzymatic activity respond quickly, being subject to a rapid turnover. By contrast, the 6-SFT transcripts and enzymatic activity were found to be much more stable. The much higher responsiveness of 1-SST to regulatory processes, as compared with 6-SFT, clearly indicates that 1-SST plays the role of the pacemaker enzyme of fructan synthesis in barley leaves.
Collapse
Affiliation(s)
- Vinay J Nagaraj
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Denise Altenbach
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Virginie Galati
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Marcel Lüscher
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
- Present address: Marcel Lüscher, Hauptstrasse 74, CH-4450 Sissach, Switzerland
| | - Alain D Meyer
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
- Present address: Alain Denis Meyer, Thiersteinerrain 118, CH-4059 Basel, Switzerland
| | - Thomas Boller
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
| | - Andres Wiemken
- Zurich-Basel Plant Science Center, Botanisches Institut der Universität Basel, Hebelstrasse 1, CH-4056 Basel, Switzerland
| |
Collapse
|