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Tang Y, Li S, Zerpa-Catanho D, Zhang Z, Yang S, Zheng X, Xue S, Kuang X, Liu M, He X, Yi Z, Xiao L. Salt tolerance evaluation and mini-core collection development in Miscanthus sacchariflorus and M. lutarioriparius. FRONTIERS IN PLANT SCIENCE 2024; 15:1364826. [PMID: 38504893 PMCID: PMC10948507 DOI: 10.3389/fpls.2024.1364826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 02/21/2024] [Indexed: 03/21/2024]
Abstract
Marginal lands, such as those with saline soils, have potential as alternative resources for cultivating dedicated biomass crops used in the production of renewable energy and chemicals. Optimum utilization of marginal lands can not only alleviate the competition for arable land use with primary food crops, but also contribute to bioenergy products and soil improvement. Miscanthus sacchariflorus and M. lutarioriparius are prominent perennial plants suitable for sustainable bioenergy production in saline soils. However, their responses to salt stress remain largely unexplored. In this study, we utilized 318 genotypes of M. sacchariflorus and M. lutarioriparius to assess their salt tolerance levels under 150 mM NaCl using 14 traits, and subsequently established a mini-core elite collection for salt tolerance. Our results revealed substantial variation in salt tolerance among the evaluated genotypes. Salt-tolerant genotypes exhibited significantly lower Na+ content, and K+ content was positively correlated with Na+ content. Interestingly, a few genotypes with higher Na+ levels in shoots showed improved shoot growth characteristics. This observation suggests that M. sacchariflorus and M. lutarioriparius adapt to salt stress by regulating ion homeostasis, primarily through enhanced K+ uptake, shoot Na+ exclusion, and Na+ sequestration in shoot vacuoles. To evaluate salt tolerance comprehensively, we developed an assessment value (D value) based on the membership function values of the 14 traits. We identified three highly salt-tolerant, 50 salt-tolerant, 127 moderately salt-tolerant, 117 salt-sensitive, and 21 highly salt-sensitive genotypes at the seedling stage by employing the D value. A mathematical evaluation model for salt tolerance was established for M. sacchariflorus and M. lutarioriparius at the seedling stage. Notably, the mini-core collection containing 64 genotypes developed using the Core Hunter algorithm effectively represented the overall variability of the entire collection. This mini-core collection serves as a valuable gene pool for future in-depth investigations of salt tolerance mechanisms in Miscanthus.
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Affiliation(s)
- Yanmei Tang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Shicheng Li
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Dessireé Zerpa-Catanho
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Champaign, IL, United States
| | - Zhihai Zhang
- Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana-Champaign, Champaign, IL, United States
| | - Sai Yang
- Orient Science & Technology College of Hunan Agricultural University, Changsha, Hunan, China
| | - Xuying Zheng
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Champaign, IL, United States
| | - Shuai Xue
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Xianyan Kuang
- Department of Biological and Environmental Sciences, Alabama A&M University, Huntsville, AL, United States
| | - Mingxi Liu
- Department of Grassland Science, College of Agronomy, Hunan Agricultural University, Changsha, Hunan, China
| | - Xiong He
- Hunan Heyi Crop Science Co., Ltd., Changsha, Hunan, China
| | - Zili Yi
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Liang Xiao
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
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Kashcheyeva EI, Korchagina AA, Gismatulina YA, Gladysheva EK, Budaeva VV, Sakovich GV. Simultaneous Production of Cellulose Nitrates and Bacterial Cellulose from Lignocellulose of Energy Crop. Polymers (Basel) 2023; 16:42. [PMID: 38201707 PMCID: PMC10780700 DOI: 10.3390/polym16010042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/11/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
This study is focused on exploring the feasibility of simultaneously producing the two products, cellulose nitrates (CNs) and bacterial cellulose (BC), from Miscanthus × giganteus. The starting cellulose for them was isolated by successive treatments of the feedstock with HNO3 and NaOH solutions. The cellulose was subjected to enzymatic hydrolysis for 2, 8, and 24 h. The cellulose samples after the hydrolysis were distinct in structure from the starting sample (degree of polymerization (DP) 1770, degree of crystallinity (DC) 64%) and between each other (DP 1510-1760, DC 72-75%). The nitration showed that these samples and the starting cellulose could successfully be nitrated to furnish acetone-soluble CNs. Extending the hydrolysis time from 2 h to 24 h led to an enhanced yield of CNs from 116 to 131%, with the nitrogen content and the viscosity of the CN samples increasing from 11.35 to 11.83% and from 94 to 119 mPa·s, respectively. The SEM analysis demonstrated that CNs retained the fiber shape. The IR spectroscopy confirmed that the synthesized material was specifically CNs, as evidenced by the characteristic frequencies of 1657-1659, 1277, 832-833, 747, and 688-690 cm-1. Nutrient media derived from the hydrolyzates obtained in 8 h and 24 h were of good quality for the synthesis of BC, with yields of 11.1% and 9.6%, respectively. The BC samples had a reticulate structure made of interlaced microfibrils with 65 and 81 nm widths and DPs of 2100 and 2300, respectively. It is for the first time that such an approach for the simultaneous production of CNs and BC has been employed.
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Affiliation(s)
- Ekaterina I. Kashcheyeva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (A.A.K.); (Y.A.G.); (V.V.B.)
| | | | | | - Evgenia K. Gladysheva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (A.A.K.); (Y.A.G.); (V.V.B.)
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