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Pontigo S, Parra-Almuna L, Luengo-Escobar A, Poblete-Grant P, Nunes-Nesi A, Mora MDLL, Cartes P. Biochemical and Molecular Responses Underlying the Contrasting Phosphorus Use Efficiency in Ryegrass Cultivars. PLANTS (BASEL, SWITZERLAND) 2023; 12:1224. [PMID: 36986913 PMCID: PMC10057710 DOI: 10.3390/plants12061224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/23/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
Improving plant ability to acquire and efficiently utilize phosphorus (P) is a promising approach for developing sustainable pasture production. This study aimed to identify ryegrass cultivars with contrasting P use efficiency, and to assess their associated biochemical and molecular responses. Nine ryegrass cultivars were hydroponically grown under optimal (0.1 mM) or P-deficient (0.01 mM) conditions, and P uptake, dry biomass, phosphorus acquisition efficiency (PAE) and phosphorus utilization efficiency (PUE) were evaluated. Accordingly, two cultivars with high PAE but low PUE (Ansa and Stellar), and two cultivars with low PAE and high PUE (24Seven and Extreme) were selected to analyze the activity and gene expression of acid phosphatases (APases), as well as the transcript levels of P transporters. Our results showed that ryegrass cultivars with high PAE were mainly influenced by root-related responses, including the expression of genes codifying for the P transporter LpPHT1;4, purple acid phosphatase LpPAP1 and APase activity. Moreover, the traits that contributed greatly to enhanced PUE were the expression of LpPHT1;1/4 and LpPHO1;2, and the APase activity in shoots. These outcomes could be useful to evaluate and develop cultivars with high P-use efficiency, thus contributing to improve the management of P in grassland systems.
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Affiliation(s)
- Sofía Pontigo
- Center of Plant Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
| | - Leyla Parra-Almuna
- Center of Plant Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
| | - Ana Luengo-Escobar
- Instituto de Investigaciones Agropecuarias, INIA Carillanca, km 10 camino Cajón-Vilcún s/n, Temuco P.O. Box 929, Chile
| | - Patricia Poblete-Grant
- Center of Plant Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil
| | - María de la Luz Mora
- Center of Plant Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
| | - Paula Cartes
- Center of Plant Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4780000, Chile
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Zhou Z, Zhang L, Shu J, Wang M, Li H, Shu H, Wang X, Sun Q, Zhang S. Root Breeding in the Post-Genomics Era: From Concept to Practice in Apple. PLANTS (BASEL, SWITZERLAND) 2022; 11:1408. [PMID: 35684181 PMCID: PMC9182997 DOI: 10.3390/plants11111408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/05/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
The development of rootstocks with a high-quality dwarf-type root system is a popular research topic in the apple industry. However, the precise breeding of rootstocks is still challenging, mainly because the root system is buried deep underground, roots have a complex life cycle, and research on root architecture has progressed slowly. This paper describes ideas for the precise breeding and domestication of wild apple resources and the application of key genes. The primary goal of this research is to combine the existing rootstock resources with molecular breeding and summarize the methods of precision breeding. Here, we reviewed the existing rootstock germplasm, high-quality genome, and genetic resources available to explain how wild resources might be used in modern breeding. In particular, we proposed the 'from genotype to phenotype' theory and summarized the difficulties in future breeding processes. Lastly, the genetics governing root diversity and associated regulatory mechanisms were elaborated on to optimize the precise breeding of rootstocks.
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Affiliation(s)
- Zhou Zhou
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Lei Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Jing Shu
- College of Forestry Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China;
| | - Mengyu Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Han Li
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Huairui Shu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Xiaoyun Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Qinghua Sun
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Shizhong Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
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Ren HJ, Cui J, Yang W, Liu RD, Wang ZQ. Identification of differentially expressed genes of Trichinella spiralis larvae after exposure to host intestine milieu. PLoS One 2013; 8:e67570. [PMID: 23840742 PMCID: PMC3695927 DOI: 10.1371/journal.pone.0067570] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Accepted: 05/20/2013] [Indexed: 01/08/2023] Open
Abstract
Although it has been known for many years that T. spiralis muscle larvae (ML) can not invade intestinal epithelial cells unless they are exposed to the intestinal milieu and activated into intestinal infective larvae (IIL), which genes in IIL are involved in the process of invasion is still unknown. In this study, suppression subtractive hybridization (SSH) was performed to identify differentially expressed genes between IIL and ML. SSH library was constructed using cDNA generated from IIL as the ‘tester’. About 110 positive clones were randomly selected from the library and sequenced, of which 33 T. spiralis genes were identified. Thirty encoded proteins were annotated according to Gene Ontology Annotation in terms of molecular function, biological process, and cellular localization. Out of 30 annotated proteins, 16 proteins (53.3%) had binding activity and 12 proteins (40.0%) had catalytic activity. The results of real-time PCR showed that the expression of nine genes (Ts7, Ndr family protein; Ts8, serine/threonine-protein kinase polo; Ts11, proteasome subunit beta type-7; Ts17, nudix hydrolase; Ts19, ovochymase-1; Ts22, fibronectin type III domain protein; Ts23, muscle cell intermediate filament protein OV71; Ts26, neutral and basic amino acid transport protein rBAT and Ts33, FACT complex subunit SPT16) from 33 T. spiralis genes in IIL were up-regulated compared with that of ML. The present study provide a group of the potential invasion-related candidate genes and will be helpful for further studies of mechanisms by which T. spiralis infective larvae recognize and invade the intestinal epithelial cells.
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Affiliation(s)
- Hui Jun Ren
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China
- Departments of Clinical Laboratory, the First Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - Jing Cui
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China
- * E-mail: (JC); (ZQW)
| | - Wei Yang
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China
| | - Ruo Dan Liu
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China
| | - Zhong Quan Wang
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China
- * E-mail: (JC); (ZQW)
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Jain A, Nagarajan VK, Raghothama KG. Transcriptional regulation of phosphate acquisition by higher plants. Cell Mol Life Sci 2012; 69:3207-24. [PMID: 22899310 PMCID: PMC11114959 DOI: 10.1007/s00018-012-1090-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Revised: 07/09/2012] [Accepted: 07/09/2012] [Indexed: 01/27/2023]
Abstract
Phosphorus (P), an essential macronutrient required for plant growth and development, is often limiting in natural and agro-climatic environments. To cope with heterogeneous or low phosphate (Pi) availability, plants have evolved an array of adaptive responses facilitating optimal acquisition and distribution of Pi. The root system plays a pivotal role in Pi-deficiency-mediated adaptive responses that are regulated by a complex interplay of systemic and local Pi sensing. Cross-talk with sugar, phytohormones, and other nutrient signaling pathways further highlight the intricacies involved in maintaining Pi homeostasis. Transcriptional regulation of Pi-starvation responses is particularly intriguing and involves a host of transcription factors (TFs). Although PHR1 of Arabidopsis is an extensively studied MYB TF regulating subset of Pi-starvation responses, it is not induced during Pi deprivation. Genome-wide analyses of Arabidopsis have shown that low Pi stress triggers spatiotemporal expression of several genes encoding different TFs. Functional characterization of some of these TFs reveals their diverse roles in regulating root system architecture, and acquisition and utilization of Pi. Some of the TFs are also involved in phytohormone-mediated root responses to Pi starvation. The biological roles of these TFs in transcriptional regulation of Pi homeostasis in model plants Arabidopsis thaliana and Oryza sativa are presented in this review.
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Affiliation(s)
- Ajay Jain
- National Research Centre on Plant Biotechnology, PUSA Campus, New Delhi, India.
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Sharma NC, Sahi SV. Enhanced organic phosphorus assimilation promoting biomass and shoot P hyperaccumulations in Lolium multiflorum grown under sterile conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:10531-7. [PMID: 22035414 DOI: 10.1021/es200942v] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Search for plant species - prodigious in P use - is important for both P-sufficient and -deficient conditions. Gulf and Marshall ryegrass (Lolium multiflorum), grown in sterile media containing different organic P substrates (AMP, ATP, GMP, and IHP), exhibited high rates of growth and shoot P concentrations. Growth increase in Gulf was significantly greater on IHP relative to other sources of organic P substrates. Growth was also dependent on an increasing concentration of IHP (0-20 mM) in this cultivar. P accumulations in Gulf exceeded 1% shoot dry weight from IHP, AMP, and ATP-equivalent to the P accrual from equimolar Pi source. Plants supplied with IHP had phytase activity in root extracts comparable to that in Pi-fed plants or control (no P). The extracellular phytase, however, increased by about 100% relative to that observed in root extracts- for both ryegrass cultivars, but there were no significant differences (P < 0.05) between plant groups grown on different substrates (IHP, Pi or control). No significant differences in phosphomonoesterase activities were evident between plant groups supplied with organic P (IHP, G1P) and inorganic source or control. This study establishes the high P-use efficiency in ryegrass, irrespective of P source.
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Affiliation(s)
- Nilesh C Sharma
- Department of Biology, Western Kentucky University, Bowling Green, 1906 College Heights Boulevard, Kentucky 42101-1080, United States.
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Padmanabhan P, Venkatachalam P, Sahi SV. Characterization of upregulated genes associated with high phosphorus accumulation in cucumber. PHYSIOLOGIA PLANTARUM 2011; 143:344-354. [PMID: 21883253 DOI: 10.1111/j.1399-3054.2011.01512.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Excessive application of phosphorus (P)-rich manures to agricultural lands often results in P-accumulation in soils leading to water pollution through runoffs and leaching. Use of suitable plant species that can extract and sequester excess P from soil into their biomass is an effective method of remediation of P-contaminated soils. Knowledge on the molecular responses of plants to high P-accumulation and tolerance is lacking. Therefore, a suppression subtractive hybridization (SSH) strategy was employed to identify and elucidate the pattern of gene expression related to P-tolerance and accumulation in cucumber (Cucumis sativus L.), a P-accumulator plant. RNA isolated from cucumber grown in high P was used for 'tester' cDNA synthesis and SSH library preparation. A total of 63 cDNAs were identified as showing upregulated expression in this plant in response to high P. No putative function could be assigned to 7 (11%) of the 63 upregulated high P-modulated genes and 11 expressed sequence tags (ESTs) (17%) did not match database entries. The remaining 45 ESTs were grouped into five functional classes. The majority of these ESTs belonged to three groups: 'metabolism', 'protein synthesis/degradation and signaling' and 'cell structure/cell wall'. Only six 'stress/defense'-related ESTs were identified from this library. The results of reverse northern blot analysis was further confirmed and validated through semi-quantitative RT-PCR carried out with representative ESTs identified in this study. The research reported here may contribute to a preliminary understanding of the high P-related gene expression in this P-accumulating plant.
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Affiliation(s)
- Priya Padmanabhan
- Department of Biology, Western Kentucky University, Bowling Green, KY 42101, USA
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Zulfiqar A, Paulose B, Chhikara S, Dhankher OP. Identifying genes and gene networks involved in chromium metabolism and detoxification in Crambe abyssinica. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2011; 159:3123-3128. [PMID: 21784565 DOI: 10.1016/j.envpol.2011.06.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 05/25/2011] [Accepted: 06/24/2011] [Indexed: 05/31/2023]
Abstract
Chromium pollution is a serious environmental problem with few cost-effective remediation strategies available. Crambe abyssinica (a member of Brassicaseae), a non-food, fast growing high biomass crop, is an ideal candidate for phytoremediation of heavy metals contaminated soils. The present study used a PCR-Select Suppression Subtraction Hybridization approach in C. abyssinica to isolate differentially expressed genes in response to Cr exposure. A total of 72 differentially expressed subtracted cDNAs were sequenced and found to represent 43 genes. The subtracted cDNAs suggest that Cr stress significantly affects pathways related to stress/defense, ion transporters, sulfur assimilation, cell signaling, protein degradation, photosynthesis and cell metabolism. The regulation of these genes in response to Cr exposure was further confirmed by semi-quantitative RT-PCR. Characterization of these differentially expressed genes may enable the engineering of non-food, high-biomass plants, including C. abyssinica, for phytoremediation of Cr-contaminated soils and sediments.
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Affiliation(s)
- Asma Zulfiqar
- Department of Plant, Soil, and Insect Sciences, 270 Stockbridge Road, University of Massachusetts Amherst, MA 01003, USA.
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Padmanabhan P, Sahi SV. Suppression subtractive hybridization reveals differential gene expression in sunflower grown in high P. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2011; 49:584-591. [PMID: 21463950 DOI: 10.1016/j.plaphy.2011.02.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2011] [Accepted: 02/18/2011] [Indexed: 05/30/2023]
Abstract
Sunflower (Helianthus annuus L.) is a commercially important oilseed crop. Previous studies proved that this crop is a promising plant species for phytoextraction of excess soil phosphorus (P) because of its superior P accumulating characteristics. Suppression subtractive hybridization (SSH) strategy was employed to isolate and characterize genes that are induced in response to high P in this crop. SSH library was prepared using cDNA generated from plants treated with high P as the 'tester'. Based on the results of dot blot analysis, 360 positive cDNA clones were selected from the SSH library for sequencing. A total of 89 non-redundant expressed sequence tags (ESTs) were identified as high P-responsive genes and they were classified into 6 functional groups. Several genes involved in metabolism showed markedly preferential expression in the library. For further confirmation, thirteen of the representative ESTs were selected from all categories for RT-PCR analysis and the results showed up-regulation of these genes in response to high P-treatment. The gene expression data derived from this study suggested that several of the up-regulated genes identified under high P-treatment might be involved in P-accumulation and tolerance in this plant.
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Affiliation(s)
- Priya Padmanabhan
- Department of Biology, Western Kentucky University, 1906 College Heights Blvd #110180, Bowling Green, KY 42101-1080, USA
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Rascio N, Navari-Izzo F. Heavy metal hyperaccumulating plants: how and why do they do it? And what makes them so interesting? PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2011; 180:169-81. [PMID: 21421358 DOI: 10.1016/j.plantsci.2010.08.016] [Citation(s) in RCA: 700] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 08/25/2010] [Accepted: 08/26/2010] [Indexed: 05/18/2023]
Abstract
The term "hyperaccumulator" describes a number of plants that belong to distantly related families, but share the ability to grow on metalliferous soils and to accumulate extraordinarily high amounts of heavy metals in the aerial organs, far in excess of the levels found in the majority of species, without suffering phytotoxic effects. Three basic hallmarks distinguish hyperaccumulators from related non-hyperaccumulating taxa: a strongly enhanced rate of heavy metal uptake, a faster root-to-shoot translocation and a greater ability to detoxify and sequester heavy metals in leaves. An interesting breakthrough that has emerged from comparative physiological and molecular analyses of hyperaccumulators and related non-hyperaccumulators is that most key steps of hyperaccumulation rely on different regulation and expression of genes found in both kinds of plants. In particular, a determinant role in driving the uptake, translocation to leaves and, finally, sequestration in vacuoles or cell walls of great amounts of heavy metals, is played in hyperaccumulators by constitutive overexpression of genes encoding transmembrane transporters, such as members of ZIP, HMA, MATE, YSL and MTP families. Among the hypotheses proposed to explain the function of hyperaccumulation, most evidence has supported the "elemental defence" hypothesis, which states that plants hyperaccumulate heavy metals as a defence mechanism against natural enemies, such as herbivores. According to the more recent hypothesis of "joint effects", heavy metals can operate in concert with organic defensive compounds leading to enhanced plant defence overall. Heavy metal contaminated soils pose an increasing problem to human and animal health. Using plants that hyperaccumulate specific metals in cleanup efforts appeared over the last 20 years. Metal accumulating species can be used for phytoremediation (removal of contaminant from soils) or phytomining (growing plants to harvest the metals). In addition, as many of the metals that can be hyperaccumulated are also essential nutrients, food fortification and phytoremediation might be considered two sides of the same coin. An overview of literature discussing the phytoremediation capacity of hyperaccumulators to clean up soils contaminated with heavy metals and the possibility of using these plants in phytomining is presented.
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Affiliation(s)
- Nicoletta Rascio
- Department of Biology, University of Padova, via U. Bassi 58/B, I-35121 Padova, Italy.
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Gu L, Xu D, You T, Li X, Yao S, Chen S, Zhao J, Lan H, Zhang F. Analysis of gene expression by ESTs from suppression subtractive hybridization library in Chenopodium album L. under salt stress. Mol Biol Rep 2011; 38:5285-95. [PMID: 21246286 DOI: 10.1007/s11033-011-0678-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2010] [Accepted: 01/10/2011] [Indexed: 11/29/2022]
Abstract
To identify genes expression in Chenopodium album exposed to NaCl stress and screen ESTs related to salt stress, a subtractive suppression hybridization (SSH) library of C. album under salt stress was constructed in the present study. Random EST sequencing produced 825 high-quality ESTs with GenBank ID GE746311-GE747007, which had 301 bp of average size and were clustered into 88 contigs and 550 singletons. They were classified into 12 categories according to their function annotations. 635 ESTs (76.97%) showed similarities to gene sequences in the non-redundancy database, while 190 ESTs (23.03%) showed low or no similarities. The transcriptional profiles of 56 ESTs randomly selected from 347 unknown or novel ESTs of SSH library under varying NaCl concentration and at different time points were analyzed. The results indicated that a high proportion of tested ESTs were activated by salt stress. Four in 56 ESTs responded to NaCl were also enhanced in expression level when exposed to ABA and PEG stresses. The above four ESTs were validated by northern blotting which was consistent with the results of RT-PCR. The results suggested that genes corresponded to these ESTs might be involved in stress response or regulation. The complete sequences and detailed function of these ESTs need to be further studied.
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Affiliation(s)
- Lili Gu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China
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D’Urso OF, D’Urso PI, Storelli C, Marsigliante S. Solid phase subtractive cloning in differentially expressed genes identification. Mol Biol Rep 2009; 37:1435-8. [DOI: 10.1007/s11033-009-9530-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Accepted: 03/20/2009] [Indexed: 11/30/2022]
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