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Ahmed S, Khan MSS, Xue S, Islam F, Ikram AU, Abdullah M, Liu S, Tappiban P, Chen J. A comprehensive overview of omics-based approaches to enhance biotic and abiotic stress tolerance in sweet potato. HORTICULTURE RESEARCH 2024; 11:uhae014. [PMID: 38464477 PMCID: PMC10923648 DOI: 10.1093/hr/uhae014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 01/09/2024] [Indexed: 03/12/2024]
Abstract
Biotic and abiotic stresses negatively affect the yield and overall plant developmental process, thus causing substantial losses in global sweet potato production. To cope with stresses, sweet potato has evolved numerous strategies to tackle ever-changing surroundings and biological and environmental conditions. The invention of modern sequencing technology and the latest data processing and analysis instruments has paved the way to integrate biological information from different approaches and helps to understand plant system biology more precisely. The advancement in omics technologies has accumulated and provided a great source of information at all levels (genome, transcript, protein, and metabolite) under stressful conditions. These latest molecular tools facilitate us to understand better the plant's responses to stress signaling and help to process/integrate the biological information encoded within the biological system of plants. This review briefly addresses utilizing the latest omics strategies for deciphering the adaptive mechanisms for sweet potatoes' biotic and abiotic stress tolerance via functional genomics, transcriptomics, proteomics, and metabolomics. This information also provides a powerful reference to understand the complex, well-coordinated stress signaling genetic regulatory networks and better comprehend the plant phenotypic responses at the cellular/molecular level under various environmental stimuli, thus accelerating the design of stress-resilient sweet potato via the latest genetic engineering approaches.
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Affiliation(s)
- Sulaiman Ahmed
- International Genome Center, Jiangsu University, Zhenjiang 212013, China
| | | | - Songlei Xue
- Jiangsu Coastal Area Institute of Agricultural Sciences, Yancheng 224000, China
| | - Faisal Islam
- International Genome Center, Jiangsu University, Zhenjiang 212013, China
| | - Aziz Ul Ikram
- International Genome Center, Jiangsu University, Zhenjiang 212013, China
| | - Muhammad Abdullah
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Minghang, 200240, Shanghai, China
| | - Shan Liu
- International Genome Center, Jiangsu University, Zhenjiang 212013, China
| | - Piengtawan Tappiban
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Jian Chen
- International Genome Center, Jiangsu University, Zhenjiang 212013, China
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Kumar S, Liu Y, Wang M, Khan MN, Wang S, Li Y, Chen Y, Zhu G. Alleviating sweetpotato salt tolerance through exogenous glutathione and melatonin: A profound mechanism for active oxygen detoxification and preservation of photosynthetic organs. CHEMOSPHERE 2024; 350:141120. [PMID: 38199502 DOI: 10.1016/j.chemosphere.2024.141120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/25/2023] [Accepted: 01/03/2024] [Indexed: 01/12/2024]
Abstract
Salt stress profoundly impacts sweetpotato production. Exogenous glutathione (GSH) and melatonin (MT) promoted plant growth under stress, but their specific roles and mechanisms in sweetpotato salt tolerance need exploration. This study investigated GSH and MT's regulatory mechanisms in sweetpotato under salt stress. Salt stress significantly reduces both growth and biomass by hindering photosynthesis, root traits, K+ content, and K+/Na+ balance, leading to oxidative stress and excessive hydrogen peroxide (H2O2), superoxide ion (O2•-), and malondialdehyde (MDA) production and Na+ accumulation. Nevertheless, GSH (2 mM) and MT (25 μM) pre-treatments effectively mitigated salt-induced oxidative damage and protected the plasma membrane. They reduced osmotic pressure by enhancing K+ uptake, K+/Na+ regulation, osmolyte accumulation, and reducing Na+ accumulation. Improved stomatal traits, chloroplast and grana lamella preservation, and maintenance of mesophyll cells, cell wall, and mitochondrial structure were observed with GSH and MT pre-treatments under salt stress, therefore boosting the photosynthetic system and enhancing plant growth and biomass. Moreover, the findings also indicate that the positive outcomes of GSH and MT pre-treatments result from elevated antioxidant levels, enhanced enzymatic activity, and upregulated expression of sodium hydrogen exchanger 2 (NHX2), K+transporter 1 (AKT1), and cation/H+exchanger (CHX), CBL-interacting protein kinase 1 (CIPK1), and antioxidant enzyme genes. These mechanisms enhance structural stability in photosynthesis and reduce salt stress. Evidently, MT pre-treatment exhibited superior effects compared to GSH. These findings provide a firm theoretical basis for employing GSH and MT to enhance salt tolerance in sweetpotato cultivation.
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Affiliation(s)
- Sunjeet Kumar
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China
| | - Yang Liu
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China
| | - Mengzhao Wang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China
| | - Mohammad Nauman Khan
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Shihai Wang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China
| | - Yongping Li
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China
| | - Yanli Chen
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China.
| | - Guopeng Zhu
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China; Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Hainan University, Haikou, 570228, China.
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Divya K, Thangaraj M, Krishna Radhika N. CRISPR/Cas9: an advanced platform for root and tuber crops improvement. Front Genome Ed 2024; 5:1242510. [PMID: 38312197 PMCID: PMC10836405 DOI: 10.3389/fgeed.2023.1242510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/26/2023] [Indexed: 02/06/2024] Open
Abstract
Root and tuber crops (RTCs), which include cassava, potato, sweet potato, and yams, principally function as staple crops for a considerable fraction of the world population, in addition to their diverse applications in nutrition, industry, and bioenergy sectors. Even then, RTCs are an underutilized group considering their potential as industrial raw material. Complexities in conventional RTC improvement programs curb the extensive exploitation of the potentials of this group of crop species for food, energy production, value addition, and sustainable development. Now, with the advent of whole-genome sequencing, sufficient sequence data are available for cassava, sweet potato, and potato. These genomic resources provide enormous scope for the improvement of tuber crops, to make them better suited for agronomic and industrial applications. There has been remarkable progress in RTC improvement through the deployment of new strategies like gene editing over the last decade. This review brings out the major areas where CRISPR/Cas technology has improved tuber crops. Strategies for genetic transformation of RTCs with CRISPR/Cas9 constructs and regeneration of edited lines and the bottlenecks encountered in their establishment are also discussed. Certain attributes of tuber crops requiring focus in future research along with putative editing targets are also indicated. Altogether, this review provides a comprehensive account of developments achieved, future lines of research, bottlenecks, and major experimental concerns regarding the establishment of CRISPR/Cas9-based gene editing in RTCs.
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Affiliation(s)
- K Divya
- ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, India
| | | | - N Krishna Radhika
- ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, India
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Sapakhova Z, Raissova N, Daurov D, Zhapar K, Daurova A, Zhigailov A, Zhambakin K, Shamekova M. Sweet Potato as a Key Crop for Food Security under the Conditions of Global Climate Change: A Review. PLANTS (BASEL, SWITZERLAND) 2023; 12:2516. [PMID: 37447081 DOI: 10.3390/plants12132516] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023]
Abstract
Sweet potato is one of the most economically important crops for addressing global food security and climate change issues, especially under conditions of extensive agriculture, such as those found in developing countries. However, osmotic stress negatively impacts the agronomic and economic productivity of sweet potato cultivation by inducing several morphological, physiological, and biochemical changes. Plants employ many signaling pathways to respond to water stress by modifying their growth patterns, activating antioxidants, accumulating suitable solutes and chaperones, and making stress proteins. These physiological, metabolic, and genetic modifications can be employed as the best indicators for choosing drought-tolerant genotypes. The main objective of sweet potato breeding in many regions of the world, especially those affected by drought, is to obtain varieties that combine drought tolerance with high yields. In this regard, the study of the physiological and biochemical features of certain varieties is important for the implementation of drought resistance measures. Adapted genotypes can be selected and improved for particular growing conditions by using suitable tools and drought tolerance-related selection criteria. By regulating genetics in this way, the creation of drought-resistant varieties may become cost-effective for smallholder farmers. This review focuses on the drought tolerance mechanisms of sweet potato, the effects of drought stress on its productivity, its crop management strategies for drought mitigation, traditional and molecular sweet potato breeding methods for drought tolerance, and the use of biotechnological methods to increase the tolerance of sweet potato to drought.
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Affiliation(s)
- Zagipa Sapakhova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Nurgul Raissova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Dias Daurov
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Kuanysh Zhapar
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Ainash Daurova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Andrey Zhigailov
- M. Aitkhozhin Institute of Molecular Biology and Biochemistry, Almaty 050012, Kazakhstan
| | - Kabyl Zhambakin
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
| | - Malika Shamekova
- Institute of Plant Biology and Biotechnology, Almaty 050040, Kazakhstan
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Ogiso-Tanaka E, Chankaew S, Yoshida Y, Isemura T, Marubodee R, Kongjaimun A, Baba-Kasai A, Okuno K, Ehara H, Tomooka N. Unique Salt-Tolerance-Related QTLs, Evolved in Vigna riukiuensis (Na + Includer) and V. nakashimae (Na + Excluder), Shed Light on the Development of Super-Salt-Tolerant Azuki Bean ( V. angularis) Cultivars. PLANTS (BASEL, SWITZERLAND) 2023; 12:1680. [PMID: 37111908 PMCID: PMC10146836 DOI: 10.3390/plants12081680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
Wild relatives of crops have the potential to improve food crops, especially in terms of improving abiotic stress tolerance. Two closely related wild species of the traditional East Asian legume crops, Azuki bean (Vigna angularis), V. riukiuensis "Tojinbaka" and V. nakashimae "Ukushima" were shown to have much higher levels of salt tolerance than azuki beans. To identify the genomic regions responsible for salt tolerance in "Tojinbaka" and "Ukushima", three interspecific hybrids were developed: (A) azuki bean cultivar "Kyoto Dainagon" × "Tojinbaka", (B) "Kyoto Dainagon" × "Ukushima" and (C) "Ukushima" × "Tojinbaka". Linkage maps were developed using SSR or restriction-site-associated DNA markers. There were three QTLs for "percentage of wilt leaves" in populations A, B and C, while populations A and B had three QTLs and population C had two QTLs for "days to wilt". In population C, four QTLs were detected for Na+ concentration in the primary leaf. Among the F2 individuals in population C, 24% showed higher salt tolerance than both wild parents, suggesting that the salt tolerance of azuki beans can be further improved by combining the QTL alleles of the two wild relatives. The marker information would facilitate the transfer of salt tolerance alleles from "Tojinbaka" and "Ukushima" to azuki beans.
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Affiliation(s)
- Eri Ogiso-Tanaka
- Genetic Resources Center, National Institute of Agrobiological Sciences (NIAS), 2-1-2 Kannondai, Tsukuba 305-8602, Ibaraki, Japan
| | - Sompong Chankaew
- Program in Plant Breeding, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen, Nakhon Pathom 73140, Thailand
| | - Yutaro Yoshida
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennohdai 1-1-1, Tsukuba 305-8571, Ibaraki, Japan
| | - Takehisa Isemura
- Genetic Resources Center, National Institute of Agrobiological Sciences (NIAS), 2-1-2 Kannondai, Tsukuba 305-8602, Ibaraki, Japan
| | - Rusama Marubodee
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu 514-0102, Mie, Japan
| | - Alisa Kongjaimun
- Genetic Resources Center, National Institute of Agrobiological Sciences (NIAS), 2-1-2 Kannondai, Tsukuba 305-8602, Ibaraki, Japan
| | - Akiko Baba-Kasai
- Genetic Resources Center, National Institute of Agrobiological Sciences (NIAS), 2-1-2 Kannondai, Tsukuba 305-8602, Ibaraki, Japan
| | - Kazutoshi Okuno
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennohdai 1-1-1, Tsukuba 305-8571, Ibaraki, Japan
| | - Hiroshi Ehara
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu 514-0102, Mie, Japan
| | - Norihiko Tomooka
- Genetic Resources Center, National Institute of Agrobiological Sciences (NIAS), 2-1-2 Kannondai, Tsukuba 305-8602, Ibaraki, Japan
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Batool F, Hassan S, Azam S, Sher Z, Ali Q, Rashid B. Transformation and expressional studies of GaZnF gene to improve drought tolerance in Gossypium hirsutum. Sci Rep 2023; 13:5064. [PMID: 36977831 PMCID: PMC10050179 DOI: 10.1038/s41598-023-32383-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 03/27/2023] [Indexed: 03/30/2023] Open
Abstract
Drought stress is the major limiting factor in plant growth and production. Cotton is a significant crop as textile fiber and oilseed, but its production is generally affected by drought stress, mainly in dry regions. This study aimed to investigate the expression of Zinc finger transcription factor's gene (GaZnF) to enhance the drought tolerance in Gossypium hirsutum. Sequence features of the GaZnF protein were recognized through different bioinformatics tools like multiple sequence alignment analysis, phylogenetic tree for evolutionary relationships, Protein motifs, a transmembrane domain, secondary structure and physio-chemical properties indicating that GaZnF is a stable protein. CIM-482, a local Gossypium hirsutum variety was transformed with GaZnF through Agrobacterium-mediated transformation method with 2.57% transformation efficiency. The integration of GaZnF was confirmed through Southern blot showing 531 bp, and Western blot indicated a 95 kDa transgene-GUS fusion band in transgenic plants. The normalized real-time expression analysis revealed the highest relative fold spatial expression of cDNA of GaZnF within leaf tissues at vegetative and flowering stages under drought stress. Morphological, physiological and biochemical parameters of transgenic cotton plants at 05- and 10-day drought stress was higher than those of non-transgenic control plants. The values of fresh and dry biomass, chlorophyll content, photosynthesis, transpiration rate, and stomatal conductance reduced in GaZnF transgenic cotton plants at 05- and 10-day drought stress, but their values were less low in transgenic plants than those of non-transgenic control plants. These findings showed that GaZnF gene expression in transgenic plants could be a valuable source for the development of drought-tolerant homozygous lines through breeding.
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Affiliation(s)
- Fatima Batool
- National Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 West Canal Bank Road Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Sameera Hassan
- National Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 West Canal Bank Road Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Saira Azam
- National Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 West Canal Bank Road Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Zunaira Sher
- National Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 West Canal Bank Road Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Qurban Ali
- Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences, University of the Punjab Lahore, Lahore, Pakistan.
| | - Bushra Rashid
- National Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 West Canal Bank Road Thokar Niaz Baig, Lahore, 53700, Pakistan.
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Rahman MA, Woo JH, Lee SH, Park HS, Kabir AH, Raza A, El Sabagh A, Lee KW. Regulation of Na +/H + exchangers, Na +/K + transporters, and lignin biosynthesis genes, along with lignin accumulation, sodium extrusion, and antioxidant defense, confers salt tolerance in alfalfa. FRONTIERS IN PLANT SCIENCE 2022; 13:1041764. [PMID: 36420040 PMCID: PMC9676661 DOI: 10.3389/fpls.2022.1041764] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 09/26/2022] [Indexed: 06/12/2023]
Abstract
Accumulation of high sodium (Na+) leads to disruption of metabolic processes and decline in plant growth and productivity. Therefore, this study was undertaken to clarify how Na+/H+ exchangers and Na+/K+ transporter genes contribute to Na+ homeostasis and the substantial involvement of lignin biosynthesis genes in salt tolerance in alfalfa (Medicago sativa L.), which is poorly understood. In this study, high Na+ exhibited a substantial reduction of morphophysiological indices and induced oxidative stress indicators in Xingjiang Daye (XJD; sensitive genotype), while Zhongmu (ZM; tolerant genotype) remained unaffected. The higher accumulation of Na+ and the lower accumulation of K+ and K+/(Na+ + K+) ratio were found in roots and shoots of XJD compared with ZM under salt stress. The ZM genotype showed a high expression of SOS1 (salt overly sensitive 1), NHX1 (sodium/hydrogen exchanger 1), and HKT1 (high-affinity potassium transporter 1), which were involved in K+ accumulation and excess Na+ extrusion from the cells compared with XJD. The lignin accumulation was higher in the salt-adapted ZM genotype than the sensitive XJD genotype. Consequently, several lignin biosynthesis-related genes including 4CL2, CCoAOMT, COMT, CCR, C4H, PAL1, and PRX1 exhibited higher mRNA expression in salt-tolerant ZM compared with XJD. Moreover, antioxidant enzyme (catalase, superoxide dismutase, ascorbate peroxidase, and glutathione reductase) activity was higher in ZM relative to XJD. This result suggests that high antioxidant provided the defense against oxidative damages in ZM, whereas low enzyme activity with high Na+ triggered the oxidative damage in XJD. These findings together illustrate the ion exchanger, antiporter, and lignin biosysthetic genes involving mechanistic insights into differential salt tolerance in alfalfa.
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Affiliation(s)
- Md Atikur Rahman
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Jae Hoon Woo
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Sang-Hoon Lee
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Hyung Soo Park
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Ahmad Humayan Kabir
- Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, Bangladesh
- Department of Genetics, University of Georgia, Athens, GA, United States
| | - Ali Raza
- College of Agriculture, Oil Crops Research Institute, Fujian Agriculture and Forestry University (FAFU), Fuzhou, China
| | - Ayman El Sabagh
- Faculty of Agriculture, Department of Field Crops, Siirt University, Siirt, Turkey
- Department of Agronomy, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Shaikh, Egypt
| | - Ki-Won Lee
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
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Liu L, Li H, Li N, Li S, Guo J, Li X. Parental salt priming improves the low temperature tolerance in wheat offspring via modulating the seed proteome. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 324:111428. [PMID: 36007631 DOI: 10.1016/j.plantsci.2022.111428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/12/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Low temperature is one of the main abiotic stresses that inhibit wheat growth and development. To understand the physiological mechanism of salt priming induced low temperature tolerance and its transgenerational effects, the chlorophyl b-deficient mutant (ANK) and its wild type (WT) wheat were subjected to low temperature stress after parental salt priming. Salt priming significantly decreased the levels of superoxide anions, hydrogen peroxide and malondialdehyde in both parental and offspring plants under low temperature. The catalase activity in parental wheat and activities of dehydroascorbate reductase and glutathione reductase in the offspring were significantly increased by salt priming under low temperature. Meanwhile, salt priming contributed to mantaining the integrity of chloroplast structure and relatively higher net photosynthetic rate (Pn) in both generations under low temperature. Salt priming also improved the carbohydrate metabolism enzyme activities of parental and offspring plants, such as phosphoglucomutase, fructokinase and sucrose synthase. In addition, ANK plants had significantly higher carbohydrate metabolism enzyme activities than WT plants. The differential expressed proteins (DEP) in seeds of two genotypes under salt priming were mainly related to homeostasis, electron transfer activity, photosynthesis and carbohydrate metabolism. Correlation network analysis showed that the expression of DEP under salt priming was significantly correlated to sucrose concentration and cytoplasmic peroxidase (POX) activity in WT, while that was correlated to various carbohydrate metabolism enzyme activities in ANK plants. These results indicated that the parental salt priming induced modulations of seed proteome regulated the ROS metabolism, photosynthetic carbon assimilation and carbohydrate metabolism, hence enhancing the low temperature tolerance in offspring wheat.
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Affiliation(s)
- Lei Liu
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Hui Li
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Department of Biology, Xinzhou Teachers University, Xinzhou 034000, China
| | - Na Li
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Shuxin Li
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junhong Guo
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangnan Li
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Engineering Laboratory for Eco-agriculture in Water Source of Liaoheyuan, Chinese Academy of Sciences, Changchun 130102, China.
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Yao X, Zhou M, Ruan J, Peng Y, Ma C, Wu W, Gao A, Weng W, Cheng J. Physiological and Biochemical Regulation Mechanism of Exogenous Hydrogen Peroxide in Alleviating NaCl Stress Toxicity in Tartary Buckwheat (Fagopyrum tataricum (L.) Gaertn). Int J Mol Sci 2022; 23:ijms231810698. [PMID: 36142630 PMCID: PMC9505081 DOI: 10.3390/ijms231810698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/06/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
We aimed to elucidate the physiological and biochemical mechanism by which exogenous hydrogen peroxide (H2O2) alleviates salt stress toxicity in Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn). Tartary buckwheat “Chuanqiao-2” under 150 mmol·L−1 salt (NaCl) stress was treated with 5 or 10 mmol·L−1 H2O2, and seedling growth, physiology and biochemistry, and related gene expression were studied. Treatment with 5 mmol·L−1 H2O2 significantly increased plant height (PH), fresh and dry weights of shoots (SFWs/SDWs) and roots (RFWs/RDWs), leaf length (LL) and area (LA), and relative water content (LRWC); increased chlorophyll a (Chl a) and b (Chl b) contents; improved fluorescence parameters; enhanced antioxidant enzyme activity and content; and reduced malondialdehyde (MDA) content. Expressions of all stress-related and enzyme-related genes were up-regulated. The F3′H gene (flavonoid synthesis pathway) exhibited similar up-regulation under 10 mmol·L−1 H2O2 treatment. Correlation and principal component analyses showed that 5 mmol·L−1 H2O2 could significantly alleviate the toxic effect of salt stress on Tartary buckwheat. Our results show that exogenous 5 mmol·L−1 H2O2 can alleviate the inhibitory or toxic effects of 150 mmol·L−1 NaCl stress on Tartary buckwheat by promoting growth, enhancing photosynthesis, improving enzymatic reactions, reducing membrane lipid peroxidation, and inducing the expression of related genes.
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Affiliation(s)
- Xin Yao
- College of Agronomy, Guizhou University, Guiyang 550025, China
| | - Meiliang Zhou
- Institute of Crop Science, Chinese Academy of Agriculture Science, Beijing 100081, China
| | - Jingjun Ruan
- College of Agronomy, Guizhou University, Guiyang 550025, China
- Correspondence: (J.R.); (J.C.)
| | - Yan Peng
- College of Agronomy, Guizhou University, Guiyang 550025, China
| | - Chao Ma
- College of Agronomy, Guizhou University, Guiyang 550025, China
| | - Weijiao Wu
- College of Agronomy, Guizhou University, Guiyang 550025, China
| | - Anjing Gao
- College of Agronomy, Guizhou University, Guiyang 550025, China
| | - Wenfeng Weng
- College of Agronomy, Guizhou University, Guiyang 550025, China
| | - Jianping Cheng
- College of Agronomy, Guizhou University, Guiyang 550025, China
- Correspondence: (J.R.); (J.C.)
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Hasan MN, Bhuiyan FH, Hoque H, Jewel NA, Ashrafuzzaman M, Prodhan SH. Ectopic expression of Vigna radiata's vacuolar Na+/H+ antiporter gene (VrNHX1) in indica rice (Oryza sativa L.). BIOTECHNOLOGY REPORTS 2022; 35:e00740. [PMID: 35646621 PMCID: PMC9130519 DOI: 10.1016/j.btre.2022.e00740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/13/2022] [Accepted: 05/16/2022] [Indexed: 11/22/2022]
Abstract
Successful Agrobacterium-mediated transformation of indica Dhan28 and BRRI Dhan29 Ectopic expression of the Na+/H+ exchanger 1 (VrNHX1) from Vigna radiata L. Wilczek in indica rice improves salinity tolerance. Under 150 mM NaCl salinity stress, transgenic lines performed significantly better than wild type.
It is essential to develop high salt-tolerant rice varieties in order to cultivate the salt-affected lands. In this study, Na+/H+ exchanger 1 (NHX1) gene isolated from Vigna radiata L. Wilczek was transferred in Bangladesh Rice Research Institute (BRRI) developed two indica rice genotypes BRRI Dhan28 and BRRI Dhan29 using in-planta approach for improvement of salinity tolerance. Embryonic axes of matured dehusked rice seeds were injured and co-cultivated with Agrobacterium strain harboring VrNHX1 gene and finally regenerated. GUS histochemical assay and PCR amplification of GUS-a and VrNHX1 were performed to confirm the transformation. Expression confirmation was done by semi-quantitative RT-PCR. Under salinity stress, transgenic lines showed higher chlorophyll, relative water content and decreased electrolyte leakage, proline content, lipid peroxidation level, and catalase enzyme activity which represent the better physiology than control plants. Moreover, under salinity stress (150 mM), transgenic lines exhibited superior growth and salt tolerant than non-transgenic plants.
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11
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Pan R, Buitrago S, Peng Y, Fatouh Abou-Elwafa S, Wan K, Liu Y, Wang R, Yang X, Zhang W. Genome-wide identification of cold-tolerance genes and functional analysis of IbbHLH116 gene in sweet potato. Gene X 2022; 837:146690. [PMID: 35738441 DOI: 10.1016/j.gene.2022.146690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/05/2022] [Accepted: 06/17/2022] [Indexed: 11/17/2022] Open
Abstract
Sweet potato (Ipomoea batatas L.) originated from South America; therefore, it is vulnerable to low temperature. Here, the evolutionary analysis of 22 cold-responsive genes in 35 plant species revealed that the identified MYC-type basic helix-loop-helix (bHLH) transcription factors exhibit diverse structures. We found that the number of bHLH gene family members was significantly lower than that of cold-tolerant species. We further systematically evaluated the gene structure, promoter analysis, synteny analysis, and expression pattern of 28 bHLH gene family members in sweet potato. The basic helix-loop-helix protein 116 (IbbHLH116) has the closest phylogeny to the AtICE1 protein of A. thaliana. However, the IbbHLH116 protein from cold-tolerant variety FS18 showed a 37.90% of sequence homology with AtICE1 protein. Subcellular localization analysis showed that IbbHLH116 is localized in the nucleus. The transcripts of IbbHLH116 were highly accumulated in cold-tolerant genotype FS18, particularly in new leaves and stems, compared to the cold-sensitive genotype NC1 under cold stress. Overexpression of IbbHLH116 in the wild type (Col-0) A. thaliana significantly enhanced cold tolerance in transgenic plants by regulating activities of oxidative protective enzymes, such as peroxidase (POD), superoxide dismutase (SOD), and the contents of malondialdehyde (MDA), proline and soluble proteins. Moreover, overexpression of IbbHLH116 in ice1 mutant A. thaliana fully rescued the cold-sensitive phenotype by promoting the expression of C-repeat binding factors 3 (CBF3). Overexpression of IbbHLH116 in the sweet potato callus also induced the expression of CBF3 under low temperature. These results imply that IbbHLH116 can perform the function of the ICE1 gene in conferring cold tolerance in sweet potato.
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Affiliation(s)
- Rui Pan
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China
| | - Sebastian Buitrago
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China
| | - Ying Peng
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China
| | | | - Kui Wan
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China
| | - Yi Liu
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China; Hubei Sweet potato Engineering and Technology Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Rongsen Wang
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China
| | - Xinsun Yang
- Hubei Sweet potato Engineering and Technology Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Wenying Zhang
- Research Center of Crop Stresses Resistance Technologies/ Engineering Research Centre of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou 434025, China.
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12
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Amoanimaa-Dede H, Shao Z, Su C, Yeboah A, Zhu H. Genome-wide identification and characterization of F-box family proteins in sweet potato and its expression analysis under abiotic stress. Gene 2022; 817:146191. [PMID: 35026290 DOI: 10.1016/j.gene.2022.146191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 10/26/2021] [Accepted: 12/06/2021] [Indexed: 11/04/2022]
Abstract
In this study, genome-wide characterization of F-box proteins in sweet potato yielded 243 IbFBX genes, unevenly distributed on the 15 chromosomes of sweet potato. Gene duplication analysis suggested segmental duplication as the principal factor influencing the expansive evolution of IbFBX genes in sweet potato. Phylogenetic analysis clustered F-box proteins in sweet potato, Arabidopsis, and rice into six clades (I-VI). Gene structure analysis of the IbFBX genes revealed that most of the genes within the same clade were highly conserved. Expression profiles of IbFBX family genes in 9 different tissues and under stress conditions revealed that the IbFBXs were highly upregulated or downregulated in response to salt and drought stress, suggesting their significant roles in abiotic stress response and adaptation. Knowledge of the diverse functions and expression patterns of IbFBXs presents a solid theoretical basis for annotating the functions of IbFBXs and further facilitate the molecular breeding of sweet potato.
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Affiliation(s)
- Hanna Amoanimaa-Dede
- Department of Biotechnology, College of Coastal Agricultural Sciences, Guangdong Ocean University, No. 1 Haida Road, Mazhang District, Zhanjiang 524088, Guangdong, PR China
| | - Zhengwei Shao
- Department of Biotechnology, College of Coastal Agricultural Sciences, Guangdong Ocean University, No. 1 Haida Road, Mazhang District, Zhanjiang 524088, Guangdong, PR China
| | - Chuntao Su
- Department of Biotechnology, College of Coastal Agricultural Sciences, Guangdong Ocean University, No. 1 Haida Road, Mazhang District, Zhanjiang 524088, Guangdong, PR China
| | - Akwasi Yeboah
- Department of Biotechnology, College of Coastal Agricultural Sciences, Guangdong Ocean University, No. 1 Haida Road, Mazhang District, Zhanjiang 524088, Guangdong, PR China
| | - Hongbo Zhu
- Department of Biotechnology, College of Coastal Agricultural Sciences, Guangdong Ocean University, No. 1 Haida Road, Mazhang District, Zhanjiang 524088, Guangdong, PR China.
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13
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Song HH, Zhou ZL, Zhao DL, Tang J, Li YH, Han Z, Chen XY, Hu KD, Yao GF, Zhang H. Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars. FRONTIERS IN PLANT SCIENCE 2021; 12:696142. [PMID: 34887880 PMCID: PMC8649693 DOI: 10.3389/fpls.2021.696142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Sweet potato decays easily due to its high respiration rate and reactive oxygen species (ROS) accumulation during postharvest storage. In this study, we explored the relationship between antioxidant capacity in leaves and storage properties in different sweet potato cultivars, the tuberous roots of 10 sweet potato cultivars were used as the experimental materials to analyze the storage property during storage at 11-15°C. According to the decay percentage after 290 days of storage, Xu 32 was defined as a storage-tolerant cultivar (rot percentage less than 25%); Xu 55-2, Z 15-1, Shangshu 19, Yushu, and Zhezi 3 as above-moderate storage-tolerant cultivars (rot percentage ranging from 25 to 50%); Sushu 16, Yanshu 5, and Hanzi as medium-storable cultivars (rot percentage 50-75%); and Yan 25 as a storage-sensitive cultivar (rot percentage greater than 75%). Meanwhile, analysis of the α-amylase activity in root tubers of the 10 sweet potato cultivars during storage indicated that α-amylase activity was lowest in the storage-tolerant cultivar Xu 32 and highest in the storage-sensitive cultivar Yan 25. Evaluation of antioxidant enzyme activities and ROS content in the leaves of these 10 cultivars demonstrated that cultivar Xu 32, which showed the best storage property, had higher antioxidant enzyme activity [superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD)] but lower lipoxygenase (LOX) activity, hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents, and superoxide anion radical (O2⋅-) production rates compared with those of the storage-sensitive cultivar Yan 25 and the medium-storability cultivars Hanzi, Yanshu 5, and Sushu 16. Additionally, principal component analysis (PCA) suggested that sweet potato cultivars with different storage properties were clustered separately. Correlation and heat map analysis further indicated that CAT, APX, POD, and SOD activities were negatively correlated with α-amylase activity, while LOX activity and MDA and H2O2 contents were negatively correlated with the storage property of sweet potato. Combined, our findings revealed that storage property is highly correlated with antioxidant capacity in sweet potato leaves and negatively correlated with α-amylase activity in tuberous roots, which provides a convenient means for the screening of storage-tolerant sweet potato cultivars.
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Affiliation(s)
- Hui-Hui Song
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Zhi-Lin Zhou
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Dong-Lan Zhao
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Jun Tang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Yan-Hong Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Zhuo Han
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Xiao-Yan Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Kang-Di Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Gai-Fang Yao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Hua Zhang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
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14
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Gao Y, Jiao X, Gao ZF, Feng ZH, Hao LP. Transcriptional analysis of the response of nectarine fruit to low-temperature stress in cold storage. FOOD BIOTECHNOL 2021. [DOI: 10.1080/08905436.2021.1981369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yang Gao
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Xuan Jiao
- Institute of Agricultural Products Storage and Preservation, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi, China
| | - Zhen-feng Gao
- Institute of Agricultural Products Storage and Preservation, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi, China
| | - Zhi-hong Feng
- Institute of Agricultural Products Storage and Preservation, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi, China
| | - Li-Ping Hao
- College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
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15
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GhNHX3D, a Vacuolar-Localized Na +/H + Antiporter, Positively Regulates Salt Response in Upland Cotton. Int J Mol Sci 2021; 22:ijms22084047. [PMID: 33919933 PMCID: PMC8070948 DOI: 10.3390/ijms22084047] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/05/2021] [Accepted: 04/12/2021] [Indexed: 12/26/2022] Open
Abstract
Vacuolar sodium/proton (Na+/H+) antiporters (NHXs) can stabilize ion contents to improve the salt tolerance of plants. Here, GhNHX3D was cloned and characterized from upland cotton (Gossypium hirsutum). Phylogenetic and sequence analyses showed that GhNHX3D belongs to the vacuolar-type NHXs. The GhNHX3D-enhanced green fluorescent protein (eGFP) fusion protein localized on the vacuolar membrane when transiently expressed in Arabidopsis protoplasts. The quantitative real-time PCR (qRT-PCR) analysis showed that GhNHX3D was induced rapidly in response to salt stress in cotton leaves, and its transcript levels increased with the aggravation of salt stress. The introduction of GhNHX3D into the salt-sensitive yeast mutant ATX3 improved its salt tolerance. Furthermore, silencing of GhNHX3D in cotton plants by virus-induced gene silencing (VIGS) increased the Na+ levels in the leaves, stems, and roots and decreased the K+ content in the roots, leading to greater salt sensitivity. Our results indicate that GhNHX3D is a member of the vacuolar NHX family and can confer salt tolerance by adjusting the steady-state balance of cellular Na+ and K+ ions.
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16
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Santander C, Aroca R, Cartes P, Vidal G, Cornejo P. Aquaporins and cation transporters are differentially regulated by two arbuscular mycorrhizal fungi strains in lettuce cultivars growing under salinity conditions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 158:396-409. [PMID: 33248899 DOI: 10.1016/j.plaphy.2020.11.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/17/2020] [Indexed: 05/02/2023]
Abstract
The aim was to identify the effects of AM symbiosis on the expression patterns of genes associated with K+ and Na+ compartmentalization and translocation and on K+/Na+ homeostasis in some lettuce (Lactuca sativa) cultivars as well as the effects of the relative abundance of plant AQPs on plant water status. Two AM fungi species (Funneliformis mosseae and Claroideoglomus lamellosum) isolated from the hyper-arid Atacama Desert (northern Chile) were inoculated to two lettuce cultivars (Grand Rapids and Lollo Bionda), and watered with 0 and 60 mM NaCl. At 60 days of plant growth, the AM symbiotic development, biomass production, nutrient content (Pi, Na+, K+), physiological parameters, gene expressions of ion channels and transporters (NHX and HKT1), and aquaporins proteins abundance (phosphorylated and non-phosphorylated) were evaluated. Salinity increased the AM root colonization by both inocula. AM lettuce plants showed an improved growth, increased relative water content and improved of K/Na ratio in root. In Grand Rapids cultivar, the high efficiency of photosystem II was higher than Lollo Bionda cultivar; on the contrary, stomatal conductance was higher in Lollo Bionda. Nevertheless, both parameters were increased by AM colonization. In the same way, LsaHKT1;1, LsaHKT1;6, LsaNHX2, LsaNHX4, LsaNHX6 and LsaNHX8 genes and aquaporins PIP2 were up-regulated differentially by both AM fungi. The improved plant growth was closely related to a higher water status due to increased PIP2 abundance, as well as to the upregulation of LsaNHX gene expression, which concomitantly improved plant nutrition and K+/Na+ homeostasis maintenance.
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Affiliation(s)
- Christian Santander
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile; Universidad Arturo Prat, Centro de Investigación y Desarrollo en Recursos Hídricos (CIDERH), Vivar 493 2nd floor, Iquique, Chile
| | - Ricardo Aroca
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, Profesor Albareda 1, 18008, Granada, Spain
| | - Paula Cartes
- Scientific and Technological Bioresource Nucleus, BIOREN-UFRO, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile
| | - Gladys Vidal
- Grupo de Ingeniería y Biotecnología Ambiental, Facultad de Ciencias Ambientales y Centro EULA-Chile, Universidad de Concepción, Concepción, Chile
| | - Pablo Cornejo
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile.
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17
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Kotula L, Garcia Caparros P, Zörb C, Colmer TD, Flowers TJ. Improving crop salt tolerance using transgenic approaches: An update and physiological analysis. PLANT, CELL & ENVIRONMENT 2020; 43:2932-2956. [PMID: 32744336 DOI: 10.1111/pce.13865] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 07/13/2020] [Accepted: 07/24/2020] [Indexed: 05/04/2023]
Abstract
Salinization of land is likely to increase due to climate change with impact on agricultural production. Since most species used as crops are sensitive to salinity, improvement of salt tolerance is needed to maintain global food production. This review summarises successes and failures of transgenic approaches in improving salt tolerance in crop species. A conceptual model of coordinated physiological mechanisms in roots and shoots required for salt tolerance is presented. Transgenic plants overexpressing genes of key proteins contributing to Na+ 'exclusion' (PM-ATPases with SOS1 antiporter, and HKT1 transporter) and Na+ compartmentation in vacuoles (V-H+ ATPase and V-H+ PPase with NHX antiporter), as well as two proteins potentially involved in alleviating water deficit during salt stress (aquaporins and dehydrins), were evaluated. Of the 51 transformations, with gene(s) involved in Na+ 'exclusion' or Na+ vacuolar compartmentation that contained quantitative data on growth and include a non-saline control, 48 showed improvements in salt tolerance (less impact on plant mass) of transgenic plants, but with only two tested in field conditions. Of these 51 transformations, 26 involved crop species. Tissue ion concentrations were altered, but not always in the same way. Although glasshouse data are promising, field studies are required to assess crop salinity tolerance.
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Affiliation(s)
- Lukasz Kotula
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Perth, Australia
- ARC Industrial Transformation Research Hub on Legumes for Sustainable Agriculture, Faculty of Science, The University of Western Australia, Perth, Australia
| | - Pedro Garcia Caparros
- Agronomy Department of Superior School Engineering, University of Almeria, CIAIMBITAL, Agrifood Campus of International Excellence ceiA3, Almería, Spain
| | - Christian Zörb
- Institute of Crop Science, Quality of Plant Products 340e, University of Hohenheim, Stuttgart, Germany
| | - Timothy D Colmer
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Perth, Australia
- ARC Industrial Transformation Research Hub on Legumes for Sustainable Agriculture, Faculty of Science, The University of Western Australia, Perth, Australia
| | - Timothy J Flowers
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Perth, Australia
- School of Biological Sciences, University of Sussex, Sussex, UK
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Ma W, Ren Z, Zhou Y, Zhao J, Zhang F, Feng J, Liu W, Ma X. Genome-Wide Identification of the Gossypium hirsutum NHX Genes Reveals that the Endosomal-Type GhNHX4A is Critical for the Salt Tolerance of Cotton. Int J Mol Sci 2020; 21:E7712. [PMID: 33081060 PMCID: PMC7589573 DOI: 10.3390/ijms21207712] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/10/2020] [Accepted: 10/15/2020] [Indexed: 12/27/2022] Open
Abstract
Soil salinization, which is primarily due to excessive Na+ levels, is a major abiotic stress adversely affecting plant growth and development. The Na+/H+ antiporter (NHX) is a transmembrane protein mediating the transport of Na+ or K+ and H+ across the membrane to modulate the ionic balance of plants in response to salt stress. Research regarding NHXs has mainly focused on the vacuolar-type NHX family members. However, the biological functions of the endosomal-type NHXs remain relatively uncharacterized. In this study, 22 NHX family members were identified in Gossypium hirsutum. A phylogenetic analysis divided the GhNHX genes into two categories, with 18 and 4 in the vacuolar and endosomal groups, respectively. The chromosomal distribution of the NHX genes revealed the significant impact of genome-wide duplication during the polyploidization process on the number of GhNHX genes. Analyses of gene structures and conserved motifs indicated that GhNHX genes in the same phylogenetic cluster are conserved. Additionally, the salt-induced expression patterns confirmed that the expression levels of most of the GhNHX genes are affected by salinity. Specifically, in the endosomal group, GhNHX4A expression was substantially up-regulated by salt stress. A yeast functional complementation test proved that GhNHX4A can partially restore the salt tolerance of the salt-sensitive yeast mutant AXT3. Silencing GhNHX4A expression decreased the resistance of cotton to salt stress because of an increase in the accumulation of Na+ in stems and a decrease in the accumulation of K+ in roots. The results of this study may provide the basis for an in-depth characterization of the regulatory functions of NHX genes related to cotton salt tolerance, especially the endosomal-type GhNHX4A. Furthermore, the presented data may be useful for selecting appropriate candidate genes for the breeding of new salt-tolerant cotton varieties.
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Affiliation(s)
- Wenyu Ma
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, China; (W.M.); (Z.R.); (J.Z.); (F.Z.)
| | - Zhongying Ren
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, China; (W.M.); (Z.R.); (J.Z.); (F.Z.)
| | - Yang Zhou
- Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops, College of Horticulture, Hainan University, Haikou 570228, China;
| | - Junjie Zhao
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, China; (W.M.); (Z.R.); (J.Z.); (F.Z.)
| | - Fei Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, China; (W.M.); (Z.R.); (J.Z.); (F.Z.)
| | - Junping Feng
- Collaborative Innovation Center of Henan Grain Crops, Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;
| | - Wei Liu
- Collaborative Innovation Center of Henan Grain Crops, Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;
| | - Xiongfeng Ma
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, China; (W.M.); (Z.R.); (J.Z.); (F.Z.)
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Jerszurki D, Sperling O, Parthasarathi T, Lichston JE, Yaaran A, Moshelion M, Rachmilevitch S, Lazarovitch N. Wide vessels sustain marginal transpiration flux and do not optimize inefficient gas exchange activity under impaired hydraulic control and salinity. PHYSIOLOGIA PLANTARUM 2020; 170:60-74. [PMID: 32303105 DOI: 10.1111/ppl.13107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 04/03/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
Plants optimize water use and carbon assimilation via transient regulation of stomata resistance and by limiting hydraulic conductivity in a long-term response of xylem anatomy. We postulated that without effective hydraulic regulation plants would permanently restrain water loss and photosynthetic productivity under salt stress conditions. We compared wild-type tomatoes to a transgenic type (TT) with impaired stomatal control. Gas exchange activity, biomass, starch content, leaf area and root traits, mineral composition and main stems xylem anatomy and hydraulic conductivity were analyzed in plants exposed to salinities of 1 and 4 dS m-1 over 60 days. As the xylem cannot easily readjust to different environmental conditions, shifts in its anatomy and the permanent effect on plant hydraulic conductivity kept transpiration at lower levels under unstressed conditions and maintained it under salt-stress, while sustaining higher but inefficient assimilation rates, leading to starch accumulation and decreased plant biomass, leaf and root area and root length. Narrow conduits in unstressed TT plants were related to permanent restrain of hydraulic conductivity and plant transpiration. Under salinity, TT plants followed the atmospheric water demand, sustained similar transpiration rate from unstressed to salt-stressed conditions and possibly maintained hydraulic integrity, due to likely impaired hydraulic regulation, wider conduits and higher hydraulic conductivity. The accumulation of salts and starch in the TT plants was a strong evidence of salinity tolerance via osmotic regulation, also thought to help to maintain the assimilation rates and transpiration flux under salinity, although it was not translated into higher growth.
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Affiliation(s)
- Daniela Jerszurki
- Wyler Department of Dryland Agriculture, French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
| | - Or Sperling
- Institute of Plant Sciences, Agricultural Research Organization (ARO), Gilat Research Center, Israel
| | - Theivasigamani Parthasarathi
- Wyler Department of Dryland Agriculture, French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
| | | | - Adi Yaaran
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agricultural, Food & Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Menachem Moshelion
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agricultural, Food & Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Shimon Rachmilevitch
- Wyler Department of Dryland Agriculture, French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
| | - Naftali Lazarovitch
- Wyler Department of Dryland Agriculture, French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
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20
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Resistance of Fritillaria imperialis to freezing stress through gene expression, osmotic adjustment and antioxidants. Sci Rep 2020; 10:10427. [PMID: 32591518 PMCID: PMC7319971 DOI: 10.1038/s41598-020-63006-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 03/21/2020] [Indexed: 12/30/2022] Open
Abstract
Plant survival in response to freezing stress depends on the efficient activation of tolerance mechanisms. Fritillaria imperialis exposure to freezing stress enhanced signalling molecules Ca2+ and H2O2 along with overexpression of Ca2+ signalling proteins (Ca2+ dependent protein kinases, CPK), followed by upregulation of NHX1 (Na+/H+ antiporter), LEA (late embryogenesis abundant proteins) and P5CS (1-pyrroline-5-carboxylate synthetase). Overexpression of OsCNGC6 was responsible for high accumulation Ca2+, Na+ and K+. The NHX1 gene product transported Na+ to vacuoles and increased cytosolic K+ content to re-establish ionic homeostasis under stress conditions. The reduced water potential of leaves was due to high accumulation of osmolytes and ions. No changes were observed in relative water content of leaves, which might be correlated with overexpression of the LEA gene, which protects against dehydration. High accumulation of H2O2 under freezing stress was responsible for activation of antioxidant systems involving SOD, phenols, anthocyanins, catalase and ascorbate peroxidase. Photosynthesis, suppressed in freezing-stressed plants, returned to normal levels after termination of freezing stress. Taken together, our findings suggest that Fritillaria efficiently tolerated freezing stress through induction of signalling mechanisms and overexpression of cold stress-responsive genes, and prevention of cold-induced water stress, oxidative stress and photosynthetic damage.
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Hassan S, Qadir I, Aslam A, Rashid B, Bilal Sarwar M, Husnain T. Cloning, Genetic Transformation and Cellular Localization of Abiotic Stress Responsive Universal Stress Protein Gene (GUSP1) in Gossypium hirsutum. IRANIAN JOURNAL OF BIOTECHNOLOGY 2020; 18:e2312. [PMID: 33542936 PMCID: PMC7856405 DOI: 10.30498/ijb.2020.138051.2312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Drought stress seriously affects the cotton fiber development. Universal stress protein gene isolated from native species Gossypium arboreum has the promising tolerance role against these stresses. OBJECTIVES This study aimed to clone, characterize, and genetically transform the GUSP1 gene in local cotton and to observe its expression in transgenic plants under drought stress. MATERIALS AND METHODS Universal Stress Protein (GUSP1) gene from Gossypium arboreum was cloned in pCEMBIA (-) 1301plant expression vector by replacing Hygromycin and GUS exon with GUSP1-GFP fusion fragment. The construct was transformed into Agrobacterium tumefaciens and transient expression assay was confirmed by agro-infiltration of Nicotiana benthamiana leaves and green fluorescence under a confocal microscope. Gene integration and expression in transgenic plants was observed through Southern blot and real-time PCR analyses. Cellular localization was observed through a confocal microscope and the copy number of the transgene was observed in progeny plants. RESULTS Transformation efficiency was 1.9%. Developmental and spatial expression of GUSP1 was observed through Real-time PCR in stem, root, leaf, inflorescence, and seeds of transgenic plants at the vegetative and flowering stage. Integration of GUSP1 revealed a fragment of approximately 500 bp in Southern Blot analyses. Localization of GUSP1 was detected in the intact leaf of transgenic plants through GFP fluorescence in midrib, guard cells of stomata, and trichomes. Single gene copy was detected in the chromosome of transgenic seeds. CONCLUSION GUSP1 has cloned from native species of local cotton and its integration and expression in transgenic plants confirmed that the role of GUSP1 will provide direction to breed economically important cotton varieties.
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Affiliation(s)
- Sameera Hassan
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore-53700, Pakistan
| | - Imran Qadir
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore-53700, Pakistan
- Present Address: Faculty of Biochemistry and Molecular Medicine, University of Oulu, Notio, Finland
| | - Aqsa Aslam
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore-53700, Pakistan
| | - Bushra Rashid
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore-53700, Pakistan
| | - Muhammad Bilal Sarwar
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore-53700, Pakistan
| | - Tayyab Husnain
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore-53700, Pakistan
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Li Y, Zhang L, Zhu P, Cao Q, Sun J, Li Z, Xu T. Genome-wide identification, characterisation and functional evaluation of WRKY genes in the sweet potato wild ancestor Ipomoea trifida (H.B.K.) G. Don. under abiotic stresses. BMC Genet 2019; 20:90. [PMID: 31795942 PMCID: PMC6889533 DOI: 10.1186/s12863-019-0789-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 11/14/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND WRKY DNA-binding protein (WRKY) is a large gene family involved in plant responses and adaptation to salt, drought, cold and heat stresses. Sweet potato from the genus Ipomoea is a staple food crop, but the WRKY genes in Ipomoea species remain unknown to date. Hence, we carried out a genome-wide analysis of WRKYs in Ipomoea trifida (H.B.K.) G. Don., the wild ancestor of sweet potato. RESULTS A total of 83 WRKY genes encoding 96 proteins were identified in I. trifida, and their gene distribution, duplication, structure, phylogeny and expression patterns were studied. ItfWRKYs were distributed on 15 chromosomes of I. trifida. Gene duplication analysis showed that segmental duplication played an important role in the WRKY gene family expansion in I. trifida. Gene structure analysis showed that the intron-exon model of the ItfWRKY gene was highly conserved. Meanwhile, the ItfWRKYs were divided into five groups (I, IIa + IIb, IIc, IId + IIe and III) on the basis of the phylogenetic analysis on I. trifida and Arabidopsis thaliana WRKY proteins. In addition, gene expression profiles confirmed by quantitative polymerase chain reaction showed that ItfWRKYs were highly up-regulated or down-regulated under salt, drought, cold and heat stress conditions, implying that these genes play important roles in response and adaptation to abiotic stresses. CONCLUSIONS In summary, genome-wide identification, gene structure, phylogeny and expression analysis of WRKY gene in I. trifida provide basic information for further functional studies of ItfWRKYs and for the molecular breeding of sweet potato.
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Affiliation(s)
- Yuxia Li
- Key lab of phylogeny and comparative genomics of the Jiangsu province, Institute of Integrative Plant Biology, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, China
| | - Lei Zhang
- Key lab of phylogeny and comparative genomics of the Jiangsu province, Institute of Integrative Plant Biology, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, China
| | - Panpan Zhu
- Department of Plant Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 500-757, South Korea
| | - Qinghe Cao
- Xuzhou Academy of Agricultural Sciences/Sweet Potato Research Institute, CAAS, Xuzhou, 221121, Jiangsu, China
| | - Jian Sun
- Key lab of phylogeny and comparative genomics of the Jiangsu province, Institute of Integrative Plant Biology, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, China
| | - Zongyun Li
- Key lab of phylogeny and comparative genomics of the Jiangsu province, Institute of Integrative Plant Biology, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, China.
| | - Tao Xu
- Key lab of phylogeny and comparative genomics of the Jiangsu province, Institute of Integrative Plant Biology, School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, China.
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Zhang Y, Deng G, Fan W, Yuan L, Wang H, Zhang P. NHX1 and eIF4A1-stacked transgenic sweetpotato shows enhanced tolerance to drought stress. PLANT CELL REPORTS 2019; 38:1427-1438. [PMID: 31396684 DOI: 10.1007/s00299-019-02454-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
Co-expression of Na+/H+ antiporter NHX1 and DEAD-box RNA helicase eIF4A1 from Arabidopsis positively regulates drought stress tolerance by improving ROS scavenging capacity and maintaining membrane integrity in sweetpotato. Plants evolve multiple strategies for stress adaptation in nature. To improve sweetpotato resistance to drought stress, transgenic sweetpotato plants overexpressing the Arabidopsis Na+/H+ antiporter, NHX1, and the translation initiation factor elF4A1 were characterized for phenotypic traits and physiological performance. Without drought treatment, the NHX1-elF4A1 stacked lines (NE lines) showed normal, vigorous growth comparable to the WT plants. The NE plants showed dense green foliage with delayed leaf senescence and developed more roots than WT plants under drought treatment for 18 days. Compared to WT plants, higher level of reactive oxygen scavenging capacity was detected in NE lines as indicated by reduced H2O2 accumulation as well as increased superoxide dismutase activity and proline content. The relative ion leakage and malondialdehyde content were reduced in NE plants, indicating improved maintenance of intact membranes system. Both NE plants and NHX1-overexpressing plants (N lines) showed larger aerial parts and well-developed root system compared to WT plants under the drought stress conditions, likely due to the improved antioxidant capacity. The NE plants showed better ROS scavenging than N-line plants. All N- and NE-line plants produced normal storage roots with similar yields as WT in the field under normal growth conditions. These results demonstrated the potential to enhance sweetpotato productivity through stacking genes that are involved in ion compartmentalization and translation initiation.
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Affiliation(s)
- Yandi Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Gaifang Deng
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weijuan Fan
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Science, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
| | - Ling Yuan
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546, USA
| | - Hongxia Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai, 200032, China.
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY, 40546, USA.
| | - Peng Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai, 200032, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Mushke R, Yarra R, Kirti PB. Improved salinity tolerance and growth performance in transgenic sunflower plants via ectopic expression of a wheat antiporter gene (TaNHX2). Mol Biol Rep 2019; 46:5941-5953. [PMID: 31401779 DOI: 10.1007/s11033-019-05028-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 08/07/2019] [Indexed: 02/07/2023]
Abstract
Sunflower (Helianthus annuus. L) is one of the principal oil seed crops affected by the salinity stress, which limits the oil content and crop yield of sunflower plants. The acclimatization of plants to abiotic stresses such as salinity tolerance is mainly mediated by the vacuolar Na+/H+ antiporters (NHX) by tagging Na+ into vacuoles from the cytosol. We show here that the over-expression of wheat TaNHX2 gene in transgenic sunflower conferred improved salinity stress tolerance and growth performance. Transgenic sunflower plants were produced by infecting the embryonic axis ex-plants with Agrobacterium tumefaciens strain EHA105 containing a pBin438-TaNHX2 binary vector that carried a wheat antiporter (TaNHX2) gene under the control of a double CaMV 35S promoter with NPT II gene as a selectable marker. PCR analysis of T0 and T1 transgenic plants confirmed the integration of TaNHX2 in sunflower genome. Stable integration and expression of TaNHX2 in sunflower genome was further verified by Southern hybridization and semi-quantitative RT-PCR analyses. As compared to the non-transformed plants, TaNHX2 expressing transgenic plants showed better growth performance and accumulated higher Na+, K+ contents in leaves and roots under salt stress (200 mM NaCl). Transgenic sunflower plants displayed improved protection against cell damage exhibiting stable relative water content, chlorophyll content, increased proline accumulation and improved reactive oxygen species (ROS) scavenging because of higher activities of the antioxidant enzymes like superoxide dismutase and ascorbate peroxidase, along with decreased production of hydrogen peroxide, free oxygen radical and malondialdehyde (MDA) under salt stress (200 mM NaCl). Taken together, our findings suggest that TaNHX2 expression in sunflower plants contributed towards improving growth performance under sodium chloride stress.
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Affiliation(s)
- Ramesh Mushke
- Aegis Agro Chemical India Pvt Ltd, Plot No: B 11/1, Industrial Developmental Area, Uppal, Hyderabad, Telangana, 500039, India
| | - Rajesh Yarra
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, 500049, India.
| | - P B Kirti
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, 500049, India
- Rajendra Prasad Central Agricultural University, Pusa-Samsthipur, Bihar, India
- Agri Biotech Foundation, Rajendranagar, Hyderabad, Telangana, India
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Antioxidative capacity is highly associated with the storage property of tuberous roots in different sweetpotato cultivars. Sci Rep 2019; 9:11141. [PMID: 31366974 PMCID: PMC6668466 DOI: 10.1038/s41598-019-47604-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 07/15/2019] [Indexed: 02/05/2023] Open
Abstract
The activities and gene expression of antioxidative enzymes and the ROS content were analyzed in two typical storage-tolerant cultivars (Xushu 32 and Shangshu 19) and another two storage-sensitive cultivars (Yanshu 25 and Sushu 16) to explore the association between the storage capacity of sweetpotato (Ipomoea batatas (L.) Lam) and ROS scavenging capability. The storage roots of the storage-tolerant cultivars maintained higher activities and expression levels of antioxidative enzymes, including ascorbate peroxidase (APX), peroxidase (POD), catalase (CAT), and superoxide dismutase (SOD); lower activity and expression of lipoxygenase (LOX); and lower accumulation of ROS metabolites compared with the storage-sensitive cultivars. The antioxidative capability and ROS parameters of leaves were positively correlated with those of storage roots. Our results provide valuable insight for evaluating the storability of sweetpotato cultivars by analyzing the capabilities of the antioxidative system and the contents of ROS metabolites.
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26
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Wang SQ, Tang J, Hu KD, Huang ZQ, Yang F, Zhang HY, Hu LY, Li YH, Yao GF, Zhang H. Antioxidative system in sweet potato root is activated by low-temperature storage. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:3824-3833. [PMID: 30677132 DOI: 10.1002/jsfa.9604] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/09/2019] [Accepted: 01/20/2019] [Indexed: 05/05/2023]
Abstract
BACKGROUND Sweet potato is susceptible to chilling injury during low-temperature storage. To explore the correlation between chilling injury and reactive oxygen species (ROS) metabolism, the content of ROS and the activities and gene expression of antioxidant enzymes were analyzed in the typical storage-tolerant cultivar Xushu 32 and storage-sensitive cultivar Yanshu 25. RESULTS The activities of antioxidant enzymes including ascorbate peroxidase (APX), superoxide dismutase (SOD), catalase (CAT) and glutathione reductase (GR) were enhanced rapidly in the early period of storage in response to chilling stress. Thereafter, the content of ROS metabolites increased consistently due to gradual decrease in ROS scavenging enzymes. Storage-tolerant cultivar Xushu 32 had higher antioxidant enzyme activities and gene expressions as well as higher content of antioxidant metabolites and lower content of ROS metabolites compared with storage-sensitive cultivar Yanshu 25, suggesting that the capacity of ROS scavenging by antioxidant enzymes and antioxidants is highly associated with the tolerance of sweet potato to chilling stress. CONCLUSION These results indicated that the antioxidative system is activated in the storage root of sweet potato and the antioxidative capacity is positively associated with better storage performance in the storage-tolerant cultivar. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Si-Qi Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Jun Tang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Kang-Di Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Zhong-Qin Huang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Feng Yang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Hui-Yun Zhang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Lan-Ying Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
- Anhui Province Key Laboratory of Functional Compound Seasoning, Anhui Qiangwang Seasoning Food Co., Ltd., Jieshou, China
| | - Yan-Hong Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Gai-Fang Yao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Hua Zhang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
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Yarra R, Kirti PB. Expressing class I wheat NHX (TaNHX2) gene in eggplant (Solanum melongena L.) improves plant performance under saline condition. Funct Integr Genomics 2019; 19:541-554. [PMID: 30673892 DOI: 10.1007/s10142-019-00656-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 11/03/2018] [Accepted: 01/09/2019] [Indexed: 10/27/2022]
Abstract
Brinjal or eggplant (Solanum melongena L.) is an important solanaceous edible crop, and salt stress adversely affects its growth, development, and overall productivity. To cope with excess salinity, vacuolar Na+/H+ antiporters provide the best mechanism for ionic homeostasis in plants under salt stress. We generated transgenic eggplants by introducing wheat TaNHX2 gene that encodes a vacuolar Na+/H+ antiporter in to the eggplant genome via Agrobacterium-mediated transformation using pBin438 vector that harbors double35S:TaNHX2 to confer salinity tolerance. Polymerase chain reaction and southern hybridization confirmed the presence and integration of TaNHX2 gene in T1 transgenic plants. Southern positive transgenic eggplants showed varied levels of TaNHX2 transcripts as evident by RT-PCR and qRT-PCR. Stress-inducible expression of TaNHX2 significantly improved growth performance and Na+ and K+ contents from leaf and roots tissues of T2 transgenic eggplants under salt stress, compared to non-transformed plants. Furthermore, T2 transgenic eggplants displayed the stable leaf relative water content and chlorophyll content, proline accumulation, improved photosynthetic efficiency, transpiration rate, and stomatal conductivity than the non-transformed plants under salinity stress (200 mM NaCl). Data showed that the T2 transgenic lines revealed that reduction in MDA content, hydrogen peroxide, and oxygen radical production associated with the significant increase of antioxidant enzyme activity in transgenic eggplants than non-transformed plants under salt stress (200 mM NaCl). This study suggested that the TaNHX2 gene plays an important regulatory role in conferring salinity tolerance of transgenic eggplant and thus may serve as a useful candidate gene for improving salinity tolerance in other vegetable crops.
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Affiliation(s)
- Rajesh Yarra
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana State, 500046, India.
| | - P B Kirti
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana State, 500046, India
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Genome-wide identification and expression analysis of glycine-rich RNA-binding protein family in sweet potato wild relative Ipomoea trifida. Gene 2018; 686:177-186. [PMID: 30453066 DOI: 10.1016/j.gene.2018.11.044] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 10/08/2018] [Accepted: 11/15/2018] [Indexed: 01/31/2023]
Abstract
Glycine-rich RNA-binding proteins (GRPs) contain RNA recognition motif (RRM) and glycine-rich domains at the N- or C-terminus, respectively, and they participate in varied physiological and biochemical processes, as well as environmental stresses. Sweet potato from the genus Ipomoea is one of the most important crops. However, the role of the GRP gene family in Ipomoea plant species has not been reported yet. At the same time, the genome of sweet potato remains to be elucidated, but the genome of I. trifida which is most probably the progenitor of the sweet potato was released recently. In this regard, we carried out genome-wide analysis of GRP family members in I. trifida. Here, we identified nine GRP genes in I. trifida and investigated their motif distribution, promoters and gene structure. Subsequently, we performed phylogenetic analysis with the GRP genes from I. trifida, Arabidopsis thaliana, Zea mays L. and Oryza sativa to investigate their phylogenetic relationship. Moreover, we studied the expression patterns of ItGRPs in the roots, stems, young and mature leaves and flowers and found that ItGRP genes were tissue-specific. Meanwhile, the expression profiles under four abiotic stress conditions, including heat, cold, salt and drought stress treatments, revealed that some genes were markedly up-regulated or down-regulated. Taken together, our findings will provide reference to studies on the function of GRP genes in the development and stress response of I. trifida.
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Ahanger MA, Tomar NS, Tittal M, Argal S, Agarwal RM. Plant growth under water/salt stress: ROS production; antioxidants and significance of added potassium under such conditions. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2017; 23:731-744. [PMID: 29158624 PMCID: PMC5671444 DOI: 10.1007/s12298-017-0462-7] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 07/31/2017] [Indexed: 05/18/2023]
Abstract
Plants are confronted with a variety of environmenmtal stresses resulting in enhanced production of ROS. Plants require a threshold level of ROS for vital functions and any change in their concentration alters the entire physiology of plant. Delicate balance of ROS is maintained by an efficient functioning of intriguing indigenous defence system called antioxidant system comprising enzymatic and non enzymatic components. Down regulation of antioxidant system leads to ROS induced oxidative stress causing damage to important cellular structures and hence anomalies in metabolism. Proper mineral nutrition, in addition to other agricultural practices, forms an important part for growth and hence the yield. Potassium (K) is a key macro-element regulating growth and development through alterations in physiological and biochemical attributes. K has been reported to result into accumulation of osmolytes and augmentation of antioxidant components in the plants exposed to water and salt stress. In the present review an effort has been made to revisit the old findings and the current advances in research regarding the role of optimal, suboptimal and deficient K soil status on growth under normal and stressful conditions. Effect of K deficiency and sufficiency is discussed and the information about the K mediated antioxidant regulation and plant response is highlighted.
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Affiliation(s)
| | - Nisha Singh Tomar
- School of Studies in Botany, Jiwaji University, Gwalior, MP 474011 India
| | - Megha Tittal
- School of Studies in Botany, Jiwaji University, Gwalior, MP 474011 India
| | - Surendra Argal
- School of Studies in Botany, Jiwaji University, Gwalior, MP 474011 India
| | - R. M. Agarwal
- School of Studies in Botany, Jiwaji University, Gwalior, MP 474011 India
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Jin R, Kim BH, Ji CY, Kim HS, Li HM, Ma DF, Kwak SS. Overexpressing IbCBF3 increases low temperature and drought stress tolerance in transgenic sweetpotato. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 118:45-54. [PMID: 28603083 DOI: 10.1016/j.plaphy.2017.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 05/26/2017] [Accepted: 06/01/2017] [Indexed: 05/02/2023]
Abstract
Dehydration-responsive element-binding/C-repeat-binding factor (DREB/CBF) proteins regulate the transcription of genes involved in cold acclimation in several species. However, little is known about the physiological functions of CBF proteins in the low temperature-sensitive crop sweetpotato. We previously reported that the DREB1/CBF-like sweetpotato gene SwDREB1/IbCBF3 is involved in responses to diverse abiotic stresses. In this study, we confirmed that IbCBF3 is localized to the nucleus and binds to the C-repeat/dehydration-responsive elements (CRT/DRE) in the promoters of cold-regulated (COR) genes. We generated transgenic sweetpotato plants overexpressing IbCBF3 under the control of the CaMV 35S promoter (referred to as SC plants) and evaluated their responses to various abiotic stresses. IbCBF3 expression was dramatically induced by cold and drought but much less strongly induced by high salinity and ABA. We further characterized two SC lines (SC3 and SC6) with high levels of IbCBF3 transcript. The SC plants displayed enhanced tolerance to cold, drought, and oxidative stress on the whole-plant level. Under cold stress treatment (4 °C for 48 h), severe wilting and chilling injury were observed in the leaves of wild-type (WT) plants, whereas SC plants were not affected by cold stress. In addition, the COR genes were significantly upregulated in SC plants compared with the WT. The SC plants also showed significantly higher tolerance to drought stress than the WT, which was associated with higher photosynthesis efficiency and lower hydrogen peroxide levels. These results indicate that IbCBF3 is a functional transcription factor involved in the responses to various abiotic stresses in sweetpotato.
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Affiliation(s)
- Rong Jin
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Daejeon 34141, South Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Daejeon 34113, South Korea; Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Xuzhou 221121, Jiangsu, China
| | - Beg Hab Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Daejeon 34141, South Korea
| | - Chang Yoon Ji
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Daejeon 34141, South Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Daejeon 34113, South Korea
| | - Ho Soo Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Daejeon 34141, South Korea
| | - Hong Min Li
- Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Xuzhou 221121, Jiangsu, China
| | - Dai Fu Ma
- Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Xuzhou 221121, Jiangsu, China
| | - Sang-Soo Kwak
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Daejeon 34141, South Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Daejeon 34113, South Korea.
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Ma Y, Augé RM, Dong C, Cheng Z(M. Increased salt tolerance with overexpression of cation/proton antiporter 1 genes: a meta-analysis. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:162-173. [PMID: 27383431 PMCID: PMC5258863 DOI: 10.1111/pbi.12599] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 06/21/2016] [Accepted: 06/23/2016] [Indexed: 05/05/2023]
Abstract
Cation/proton antiporter 1 (CPA1) genes encode cellular Na+ /H+ exchanger proteins, which act to adjust ionic balance. Overexpression of CPA1s can improve plant performance under salt stress. However, the diversified roles of the CPA1 family and the various parameters used in evaluating transgenic plants over-expressing CPA1s make it challenging to assess the complex functions of CPA1s and their physiological mechanisms in salt tolerance. Using meta-analysis, we determined how overexpression of CPA1s has influenced several plant characteristics involved in response and resilience to NaCl stress. We also evaluated experimental variables that favour or reduce CPA1 effects in transgenic plants. Viewed across studies, overexpression of CPA1s has increased the magnitude of 10 of the 19 plant characteristics examined, by 25% or more. Among the ten moderating variables, several had substantial impacts on the extent of CPA1 influence: type of culture media, donor and recipient type and genus, and gene family. Genes from monocotyledonous plants stimulated root K+ , root K+ /Na+ , total chlorophyll, total dry weight and root length much more than genes from dicotyledonous species. Genes transformed to or from Arabidopsis have led to smaller CPA1-induced increases in plant characteristics than genes transferred to or from other genera. Heterogeneous expression of CPA1s led to greater increases in leaf chlorophyll and root length than homologous expression. These findings should help guide future investigations into the function of CPA1s in plant salt tolerance and the use of genetic engineering for breeding of resistance.
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Affiliation(s)
- Yuan‐Chun Ma
- Institute of HorticultureJiangsu Academy of Agricultural Sciences/Jiangsu Key Laboratory for Horticultural Crop Genetic ImprovementNanjingJiangsuChina
- College of HorticultureNanjing Agricultural UniversityNanjingJiangsuChina
- Department of Plant SciencesUniversity of TennesseeKnoxvilleTNUSA
| | - Robert M. Augé
- Department of Plant SciencesUniversity of TennesseeKnoxvilleTNUSA
| | - Chao Dong
- College of HorticultureNanjing Agricultural UniversityNanjingJiangsuChina
| | - Zong‐Ming (Max) Cheng
- College of HorticultureNanjing Agricultural UniversityNanjingJiangsuChina
- Department of Plant SciencesUniversity of TennesseeKnoxvilleTNUSA
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Liu Q. Improvement for agronomically important traits by gene engineering in sweetpotato. BREEDING SCIENCE 2017; 67:15-26. [PMID: 28465664 PMCID: PMC5407918 DOI: 10.1270/jsbbs.16126] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/24/2016] [Indexed: 05/05/2023]
Abstract
Sweetpotato is the seventh most important food crop in the world. It is mainly used for human food, animal feed, and for manufacturing starch and alcohol. This crop, a highly heterozygous, generally self-incompatible, outcrossing polyploidy, poses numerous challenges for the conventional breeding. Its productivity and quality are often limited by abiotic and biotic stresses. Gene engineering has been shown to have the great potential for improving the resistance to these stresses as well as the nutritional quality of sweetpotato. To date, an Agrobacterium tumefaciens-mediated transformation system has been developed for a wide range of sweetpotato genotypes. Several genes associated with salinity and drought tolerance, diseases and pests resistance, and starch, carotenoids and anthocyanins biosynthesis have been isolated and characterized from sweetpotato. Gene engineering has been used to improve abiotic and biotic stresses resistance and quality of this crop. This review summarizes major research advances made so far in improving agronomically important traits by gene engineering in sweetpotato and suggests future prospects for research in this field.
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Affiliation(s)
- Qingchang Liu
- Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization, Ministry of Education, China Agricultural University,
Beijing 100193,
China
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Ledger T, Rojas S, Timmermann T, Pinedo I, Poupin MJ, Garrido T, Richter P, Tamayo J, Donoso R. Volatile-Mediated Effects Predominate in Paraburkholderia phytofirmans Growth Promotion and Salt Stress Tolerance of Arabidopsis thaliana. Front Microbiol 2016; 7:1838. [PMID: 27909432 PMCID: PMC5112238 DOI: 10.3389/fmicb.2016.01838] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 11/01/2016] [Indexed: 01/09/2023] Open
Abstract
Abiotic stress has a growing impact on plant growth and agricultural activity worldwide. Specific plant growth promoting rhizobacteria have been reported to stimulate growth and tolerance to abiotic stress in plants, and molecular mechanisms like phytohormone synthesis and 1-aminocyclopropane-1-carboxylate deamination are usual candidates proposed to mediate these bacterial effects. Paraburkholderia phytofirmans PsJN is able to promote growth of several plant hosts, and improve their tolerance to chilling, drought and salinity. This work investigated bacterial determinants involved in PsJN stimulation of growth and salinity tolerance in Arabidopsis thaliana, showing bacteria enable plants to survive long-term salinity treatment, accumulating less sodium within leaf tissues relative to non-inoculated controls. Inactivation of specific bacterial genes encoding ACC deaminase, auxin catabolism, N-acyl-homoserine-lactone production, and flagellin synthesis showed these functions have little influence on bacterial induction of salinity tolerance. Volatile organic compound emission from strain PsJN was shown to reproduce the effects of direct bacterial inoculation of roots, increasing plant growth rate and tolerance to salinity evaluated both in vitro and in soil. Furthermore, early exposure to VOCs from P. phytofirmans was sufficient to stimulate long-term effects observed in Arabidopsis growth in the presence and absence of salinity. Organic compounds were analyzed in the headspace of PsJN cultures, showing production of 2-undecanone, 7-hexanol, 3-methylbutanol and dimethyl disulfide. Exposure of A. thaliana to different quantities of these molecules showed that they are able to influence growth in a wide range of added amounts. Exposure to a blend of the first three compounds was found to mimic the effects of PsJN on both general growth promotion and salinity tolerance. To our knowledge, this is the first report on volatile compound-mediated induction of plant abiotic stress tolerance by a Paraburkholderia species.
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Affiliation(s)
- Thomas Ledger
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
- Center of Applied Ecology and SustainabilitySantiago, Chile
- Millennium Nucleus Center for Plant Systems and Synthetic BiologySantiago, Chile
| | - Sandy Rojas
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
| | - Tania Timmermann
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
- Center of Applied Ecology and SustainabilitySantiago, Chile
- Millennium Nucleus Center for Plant Systems and Synthetic BiologySantiago, Chile
| | - Ignacio Pinedo
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
| | - María J. Poupin
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
- Center of Applied Ecology and SustainabilitySantiago, Chile
- Millennium Nucleus Center for Plant Systems and Synthetic BiologySantiago, Chile
| | - Tatiana Garrido
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de ChileSantiago, Chile
| | - Pablo Richter
- Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de ChileSantiago, Chile
| | - Javier Tamayo
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
| | - Raúl Donoso
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
- Center of Applied Ecology and SustainabilitySantiago, Chile
- Millennium Nucleus Center for Plant Systems and Synthetic BiologySantiago, Chile
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Chakraborty K, Bose J, Shabala L, Shabala S. Difference in root K+ retention ability and reduced sensitivity of K+-permeable channels to reactive oxygen species confer differential salt tolerance in three Brassica species. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:4611-25. [PMID: 27340231 PMCID: PMC4973732 DOI: 10.1093/jxb/erw236] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Brassica species are known to possess significant inter and intraspecies variability in salinity stress tolerance, but the cell-specific mechanisms conferring this difference remain elusive. In this work, the role and relative contribution of several key plasma membrane transporters to salinity stress tolerance were evaluated in three Brassica species (B. napus, B. juncea, and B. oleracea) using a range of electrophysiological assays. Initial root growth assay and viability staining revealed that B. napus was most tolerant amongst the three species, followed by B. juncea and B. oleracea At the mechanistic level, this difference was conferred by at least three complementary physiological mechanisms: (i) higher Na(+) extrusion ability from roots resulting from increased expression and activity of plasma membrane SOS1-like Na(+)/H(+) exchangers; (ii) better root K(+) retention ability resulting from stress-inducible activation of H(+)-ATPase and ability to maintain more negative membrane potential under saline conditions; and (iii) reduced sensitivity of B. napus root K(+)-permeable channels to reactive oxygen species (ROS). The last two mechanisms played the dominant role and conferred most of the differential salt sensitivity between species. Brassica napus plants were also more efficient in preventing the stress-induced increase in GORK transcript levels and up-regulation of expression of AKT1, HAK5, and HKT1 transporter genes. Taken together, our data provide the mechanistic explanation for differential salt stress sensitivity amongst these species and shed light on transcriptional and post-translational regulation of key ion transport systems involved in the maintenance of the root plasma membrane potential and cytosolic K/Na ratio as a key attribute for salt tolerance in Brassica species.
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Affiliation(s)
- Koushik Chakraborty
- Department of Plant Physiology, ICAR-Directorate of Groundnut Research, Junagadh, Gujarat-362 001, India School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Hobart, Private Bag 94, Tas 7001, Australia
| | - Jayakumar Bose
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Hobart, Private Bag 94, Tas 7001, Australia
| | - Lana Shabala
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Hobart, Private Bag 94, Tas 7001, Australia
| | - Sergey Shabala
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Hobart, Private Bag 94, Tas 7001, Australia
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Wu GQ, Feng RJ, Wang SM, Wang CM, Bao AK, Wei L, Yuan HJ. Co-expression of xerophyte Zygophyllum xanthoxylum ZxNHX and ZxVP1-1 confers enhanced salinity tolerance in chimeric sugar beet (Beta vulgaris L.). FRONTIERS IN PLANT SCIENCE 2015; 6:581. [PMID: 26284097 PMCID: PMC4517593 DOI: 10.3389/fpls.2015.00581] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 07/13/2015] [Indexed: 05/20/2023]
Abstract
Salinity is one of the major abiotic stresses that limit the growth and productivity of sugar beet (Beta vulgaris L.). To improve sugar beet's salinity tolerance, the ZxNHX and ZxVP1-1 genes encoding tonoplast Na(+)/H(+) antiporter and H(+)-PPase from xerophyte Zygophyllum xanthoxylum were co-expressed by Agrobacterium tumefaciens-mediated transformation. It is showed here that co-expression of ZxNHX and ZxVP1-1 confers enhanced salinity tolerance to the transformed sugar beet plants compared with the wild-type (WT) plants. The chimeric plants grew well in the presence of high salinity (400 mM NaCl), whereas WT plants displayed chlorosis and died within 8 days. Compared to WT plants, the chimeric plants co-expressing ZxNHX and ZxVP1-1 accumulated more proline, Na(+) and K(+) in their leaves and petioles when exposed to high salinity, which caused lower solute potential, retained more water and thus subjected to lesser cell membrane damage. Interestingly, the chimeric plants accumulated higher sucrose, glucose and fructose contents in their storage roots than WT plants in the absence or presence of high salinity. Our results suggested that co-expression of ZxNHX and ZxVP1-1 improved the osmoregulatory capacity in chimeric sugar beet through increased compartmentalization of ions into the vacuoles by enhancing the activity of proton pumps and thus mitigated Na(+)-toxicity for plants.
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Affiliation(s)
- Guo-Qiang Wu
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Rui-Jun Feng
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Suo-Min Wang
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Chun-Mei Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Ai-Ke Bao
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Li Wei
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Hui-Jun Yuan
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
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36
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Pinedo I, Ledger T, Greve M, Poupin MJ. Burkholderia phytofirmans PsJN induces long-term metabolic and transcriptional changes involved in Arabidopsis thaliana salt tolerance. FRONTIERS IN PLANT SCIENCE 2015; 6:466. [PMID: 26157451 PMCID: PMC4477060 DOI: 10.3389/fpls.2015.00466] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 06/11/2015] [Indexed: 05/18/2023]
Abstract
Salinity is one of the major limitations for food production worldwide. Improvement of plant salt-stress tolerance using plant-growth promoting rhizobacteria (PGPR) has arisen as a promising strategy to help overcome this limitation. However, the molecular and biochemical mechanisms controlling PGPR/plant interactions under salt-stress remain unclear. The main objective of this study was to obtain new insights into the mechanisms underlying salt-stress tolerance enhancement in the salt-sensitive Arabidopsis thaliana Col-0 plants, when inoculated with the well-known PGPR strain Burkholderia phytofirmans PsJN. To tackle this, different life history traits, together with the spatiotemporal accumulation patterns for key metabolites and salt-stress related transcripts, were analyzed in inoculated plants under short and long-term salt-stress. Inoculated plants displayed faster recovery and increased tolerance after sustained salt-stress. PsJN treatment accelerated the accumulation of proline and transcription of genes related to abscisic acid signaling (Relative to Dessication, RD29A and RD29B), ROS scavenging (Ascorbate Peroxidase 2), and detoxification (Glyoxalase I 7), and down-regulated the expression of Lipoxygenase 2 (related to jasmonic acid biosynthesis). Among the general transcriptional effects of this bacterium, the expression pattern of important ion-homeostasis related genes was altered after short and long-term stress (Arabidopsis K(+) Transporter 1, High-Affinity K(+) Transporter 1, Sodium Hydrogen Exchanger 2, and Arabidopsis Salt Overly Sensitive 1). In all, the faster and stronger molecular changes induced by the inoculation suggest a PsJN-priming effect, which may explain the observed tolerance after short-term and sustained salt-stress in plants. This study provides novel information about possible mechanisms involved in salt-stress tolerance induced by PGPR in plants, showing that certain changes are maintained over time. This opens up new venues to study these relevant biological associations, as well as new approaches to a better understanding of the spatiotemporal mechanisms involved in stress tolerance in plants.
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Affiliation(s)
- Ignacio Pinedo
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
| | - Thomas Ledger
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
- Center for Applied Ecology and SustainabilitySantiago, Chile
| | - Macarena Greve
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
| | - María J. Poupin
- Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo IbáñezSantiago, Chile
- Center for Applied Ecology and SustainabilitySantiago, Chile
- *Correspondence: María J. Poupin, Laboratorio de Bioingeniería, Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Avenida Diagonal Las Torres 2640, Peñalolén, Santiago 7941169, Chile,
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