1
|
Wei L, Wen S, Ma J, Tu Z, Zhu S, Zhai X, Li H. Overexpression of LtuHB6 from Liriodendron tulipifera causes lobed-leaf formation in Arabidopsis thaliana. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:1875-1887. [PMID: 36484027 PMCID: PMC9723050 DOI: 10.1007/s12298-022-01254-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Liriodendron tulipifera L. is an ornamental tree species with extraordinarily lobed leaves. However, the mechanisms underlying lobed leaf formation in plants remain unclear. The transcription factor, ARABIDOPSIS THALIANA HOMEBOX 6 (HB6), plays a role in regulating leaf margin development. HB6 is involved in cell division and differentiation of developmental organs and negatively regulates abscisic acid (ABA) signal transmission under external abiotic stress; it is unclear whether HB6 performs a pivotal role in leaf morphogenesis in L. tulipifera. In this study, full-length LtuHB6 from L. tulipifera was heterologously expressed in tobacco and Arabidopsis thaliana; its expression pattern was analyzed to determine its potential role in leaf development. In addition, LtuHB6 is localized in the nucleus and cell membrane of tobacco leaves. The expression of LtuHB6 was highest in mature leaves compared to the other stages of leaf development (bud growth, young leaves, and leaf senescence). Transgenic A. thaliana plants overexpressing LtuHB6 exhibited an abnormal phenotype with lobed leaves. Moreover, LtuHB6 overexpression significantly affected the expression of seven genes related to leaf serration in the initial stage of leaf primordia and altered the expression levels of hormonal genes. Our findings indicate that LtuHB6 is an essential regulatory factor in L. tulipifera lobed-leaf formation and is involved in regulating and responding to hormones. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-022-01254-9.
Collapse
Affiliation(s)
- Lingmin Wei
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| | - Shaoying Wen
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| | - Jikai Ma
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| | - Zhonghua Tu
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| | - Shenghua Zhu
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| | - Xinyu Zhai
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| | - Huogen Li
- Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China
| |
Collapse
|
2
|
Jo H, Kim M, Cho H, Ha BK, Kang S, Song JT, Lee JD. Identification of a Potential Gene for Elevating ω-3 Concentration and Its Efficiency for Improving the ω-6/ω-3 Ratio in Soybean. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:3836-3847. [PMID: 33770440 DOI: 10.1021/acs.jafc.0c05830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This present study was to identify a novel candidate gene that contributes to the elevated α-linolenic acid (ALA, ω-3) concentration in PE2166 from mutagenesis of Pungsannamul. Major loci qALA5_1 and qALA5_2 were detected on chromosome 5 of soybean through quantitative trait loci mapping analyses of recombinant inbred lines. With next-generation sequencing of parental lines and Pungsannamul and recombinant analyses, a potential gene, Glyma.05g221500 (HD), controlling elevated ALA concentration was identified. HD is a homeodomain-like transcriptional regulator that may regulate the expression level of microsomal ω-3 fatty acid desaturase (FAD3) genes responsible for the conversion of linoleic acid into ALA in the fatty acid biosynthetic pathway. In addition, we hypothesized that a combination of mutant alleles, HD, and either of microsomal delta-12 fatty acid desaturase 2-1 (FAD2-1) could reduce the ω-6/ω-3 ratio. In populations where HD, FAD2-1A, and FAD2-1B genes were segregated, a combination of a hd allele from PE2166 and either of the variant FAD2-1 alleles was sufficient to reduce the ω-6/ω-3 ratio in seeds.
Collapse
Affiliation(s)
- Hyun Jo
- Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Minsu Kim
- Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hyeontae Cho
- Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Bo-Keun Ha
- Department of Applied Plant Science, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sungtaeg Kang
- Department of Crop Science and Biotechnology, Dankook University, Cheonan 16890, Republic of Korea
| | - Jong Tae Song
- Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jeong-Dong Lee
- Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
| |
Collapse
|
3
|
Arora H, Padmaja KL, Paritosh K, Mukhi N, Tewari AK, Mukhopadhyay A, Gupta V, Pradhan AK, Pental D. BjuWRR1, a CC-NB-LRR gene identified in Brassica juncea, confers resistance to white rust caused by Albugo candida. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2019; 132:2223-2236. [PMID: 31049632 DOI: 10.1007/s00122-019-03350-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 04/20/2019] [Indexed: 05/28/2023]
Abstract
BjuWRR1, a CNL-type R gene, was identified from an east European gene pool line of Brassica juncea and validated for conferring resistance to white rust by genetic transformation. White rust caused by the oomycete pathogen Albugo candida is a significant disease of crucifer crops including Brassica juncea (mustard), a major oilseed crop of the Indian subcontinent. Earlier, a resistance-conferring locus named AcB1-A5.1 was mapped in an east European gene pool line of B. juncea-Donskaja-IV. This line was tested along with some other lines of B. juncea (AABB), B. rapa (AA) and B. nigra (BB) for resistance to six isolates of A. candida collected from different mustard growing regions of India. Donskaja-IV was found to be completely resistant to all the tested isolates. Sequencing of a BAC spanning the locus AcB1-A5.1 showed the presence of a single CC-NB-LRR protein encoding R gene. The genomic sequence of the putative R gene with its native promoter and terminator was used for the genetic transformation of a susceptible Indian gene pool line Varuna and was found to confer complete resistance to all the isolates. This is the first white rust resistance-conferring gene described from Brassica species and has been named BjuWRR1. Allelic variants of the gene in B. juncea germplasm and orthologues in the Brassicaceae genomes were studied to understand the evolutionary dynamics of the BjuWRR1 gene.
Collapse
Affiliation(s)
- Heena Arora
- Department of Genetics, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - K Lakshmi Padmaja
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Kumar Paritosh
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Nitika Mukhi
- Department of Genetics, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - A K Tewari
- Department of Plant Pathology, Govind Ballabh Pant University of Agriculture and Technology, Udham Singh Nagar, Pantnagar, Uttarakhand, 263145, India
| | - Arundhati Mukhopadhyay
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Vibha Gupta
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Akshay K Pradhan
- Department of Genetics, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Deepak Pental
- Centre for Genetic Manipulation of Crop Plants, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
| |
Collapse
|
4
|
Zeng W, Sun Z, Lai Z, Yang S, Chen H, Yang X, Tao J, Tang X. Determination of the MiRNAs Related to Bean Pyralid Larvae Resistance in Soybean Using Small RNA and Transcriptome Sequencing. Int J Mol Sci 2019; 20:E2966. [PMID: 31216642 PMCID: PMC6628378 DOI: 10.3390/ijms20122966] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 06/15/2019] [Accepted: 06/17/2019] [Indexed: 01/05/2023] Open
Abstract
Soybean is one of the most important oil crops in the world. Bean pyralid is a major leaf-feeding insect of soybean. In order to screen out the functional genes and regulatory pathways related to the resistance for bean pyralid larvae, the small RNA and transcriptome sequencing were performed based on the highly resistant material (Gantai-2-2) and highly susceptible material (Wan 82-178) of soybean. The results showed that, when comparing 48 h feeding with 0 h feeding, 55 differentially expressed miRNAs were identified in Gantai-2-2 and 58 differentially expressed miRNAs were identified in Wan82-178. When comparing Gantai-2-2 with Wan82-178, 77 differentially expressed miRNAs were identified at 0 h feeding, and 70 differentially expressed miRNAs were identified at 48 h feeding. The pathway analysis of the predicted target genes revealed that the plant hormone signal transduction, RNA transport, protein processing in the endoplasmic reticulum, zeatin biosynthesis, ubiquinone and other terpenoid-quinone biosynthesis, and isoquinoline alkaloid biosynthesis may play important roles in soybean's defense against the stress caused by bean pyralid larvae. According to conjoint analysis of the miRNA/mRNA, a total of 20 differentially expressed miRNAs were negatively correlated with 26 differentially expressed target genes. The qRT-PCR analysis verified that the small RNA sequencing results were credible. According to the analyses of the differentially expressed miRNAs, we speculated that miRNAs are more likely to play key roles in the resistance to insects. Gma-miR156q, Gma-miR166u, Gma-miR166b, Gma-miR166j-3p, Gma-miR319d, Gma-miR394a-3p, Gma-miR396e, and so on-as well as their negatively regulated differentially expressed target genes-may be involved in the regulation of soybean resistance to bean pyralid larvae. These results laid a foundation for further in-depth research regarding the action mechanisms of insect resistance.
Collapse
Affiliation(s)
- Weiying Zeng
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Zudong Sun
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Zhenguang Lai
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Shouzhen Yang
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Huaizhu Chen
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Xinghai Yang
- Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Jiangrong Tao
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Xiangmin Tang
- Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| |
Collapse
|
5
|
Tao JJ, Wei W, Pan WJ, Lu L, Li QT, Ma JB, Zhang WK, Ma B, Chen SY, Zhang JS. An Alfin-like gene from Atriplex hortensis enhances salt and drought tolerance and abscisic acid response in transgenic Arabidopsis. Sci Rep 2018; 8:2707. [PMID: 29426828 PMCID: PMC5807399 DOI: 10.1038/s41598-018-21148-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 01/29/2018] [Indexed: 12/11/2022] Open
Abstract
Alfin-like (AL) is a small plant-specific gene family with prominent roles in root growth and abiotic stress response. Here, we aimed to identify novel stress tolerance AL genes from the stress-tolerant species Atriplex hortensis. Totally, we isolated four AhAL genes, all encoding nuclear-localized proteins with cis-element-binding and transrepression activities. Constitutive expression of AhAL1 in Arabidopsis facilitated plants to survive under saline condition, while expressing anyone of the other three AhAL genes led to salt-hypersensitive response, indicating functional divergence of AhAL family. AhAL1 also conferred enhanced drought tolerance, as judged from enhanced survival, improved growth, decreased malonaldehyde (MDA) content and reduced water loss in AhAL1-expressing plants compared to WT. In addition, abscisic acid (ABA)-mediated stomatal closure and inhibition of seed germination and primary root elongation were enhanced in AhAL1-transgenic plants. Further analysis demonstrated that AhAL1 could bind to promoter regions of GRF7, DREB1C and several group-A PP2C genes and repress their expression. Correspondingly, the expression levels of positive stress regulator genes DREB1A, DREB2A and three ABFs were all increased in AhAL1-expressing plants. Based on these results, AhAL1 was identified as a novel candidate gene for improving abiotic stress tolerance of crop plants.
Collapse
Affiliation(s)
- Jian-Jun Tao
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Wei Wei
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Wen-Jia Pan
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Long Lu
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Qing-Tian Li
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jin-Biao Ma
- Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang, China
| | - Wan-Ke Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Biao Ma
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Shou-Yi Chen
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Jin-Song Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
6
|
Perotti MF, Ribone PA, Chan RL. Plant transcription factors from the homeodomain-leucine zipper family I. Role in development and stress responses. IUBMB Life 2017; 69:280-289. [PMID: 28337836 DOI: 10.1002/iub.1619] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 02/24/2017] [Indexed: 01/08/2023]
Abstract
In front of stressful conditions plants display adaptation mechanisms leading to changes in their morphology, physiology, development and molecular composition. Transcription factors (TFs) play crucial roles in these complex adaptation processes. This work is focused in the homeodomain-leucine zipper I (HD-Zip I) family of TFs, unique to plants. First discovered in 1991, they were identified and isolated from monocotyledonous and dicotyledonous plants showing high structural similarity and diversified functions. These TFs have, besides the homeodomain and leucine zipper, conserved motifs in their carboxy-termini allowing the interaction with the basal machinery and with other regulatory proteins. The model dicotyledonous plant Arabidopsis thaliana has 17 HD-Zip I members; most of them regulated by external stimuli and hormones. These TFs are involved in key developmental processes like root and stem elongation, rosette leaves morphology determination, inflorescence stem branching, flowering and pollen hydration. Moreover, they are key players in responses to environmental stresses and illumination conditions. Several HD-Zip I encoding genes from different species were protected in patents because their overexpression or mutation generates improved agronomical phenotypes. Here we discuss many aspects about these TFs including structural features, biological functions and their utilization as biotechnological tools to improve crops. © 2017 IUBMB Life, 69(5):280-289, 2017.
Collapse
Affiliation(s)
- María Florencia Perotti
- Instituto de Agrobiotecnología del Litoral Universidad Nacional del Litoral, CONICET, Centro Científico Tecnológico CONICET Santa Fe, Santa Fe, Argentina
| | - Pamela Anahí Ribone
- Instituto de Agrobiotecnología del Litoral Universidad Nacional del Litoral, CONICET, Centro Científico Tecnológico CONICET Santa Fe, Santa Fe, Argentina
| | - Raquel Lía Chan
- Instituto de Agrobiotecnología del Litoral Universidad Nacional del Litoral, CONICET, Centro Científico Tecnológico CONICET Santa Fe, Santa Fe, Argentina
| |
Collapse
|
7
|
Jiang Y, Liu C, Yan D, Wen X, Liu Y, Wang H, Dai J, Zhang Y, Liu Y, Zhou B, Ren X. MdHB1 down-regulation activates anthocyanin biosynthesis in the white-fleshed apple cultivar 'Granny Smith'. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:1055-1069. [PMID: 28338881 DOI: 10.1093/jxb/erx029] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Coloration in apple (Malus×domestica) flesh is mainly caused by the accumulation of anthocyanin. Anthocyanin is biosynthesized through the flavonoid pathway and regulated by MYB, bHLH, and WD40 transcription factors (TFs). Here, we report that the HD-Zip I TF MdHB1 was also involved in the regulation of anthocyanin accumulation. MdHB1 silencing caused the accumulation of anthocyanin in 'Granny Smith' flesh, whereas its overexpression reduced the flesh content of anthocyanin in 'Ballerina' (red-fleshed apple). Moreover, flowers of transgenic tobacco (Nicotiana tabacum 'NC89') overexpressing MdHB1 showed a remarkable reduction in pigmentation. Transient promoter activation assays and yeast one-hybrid results indicated that MdHB1 indirectly inhibited expression of the anthocyanin biosynthetic genes encoding dihydroflavonol-4-reductase (DFR) and UDP-glucose:flavonoid 3-O-glycosyltransferase (UFGT). Yeast two-hybrid and bimolecular fluorescence complementation determined that MdHB1 acted as a homodimer and could interact with MYB, bHLH, and WD40 in the cytoplasm, consistent with its cytoplasmic localization by green fluorescent protein fluorescence observations. Together, these results suggest that MdHB1 constrains MdMYB10, MdbHLH3, and MdTTG1 to the cytoplasm, and then represses the transcription of MdDFR and MdUFGT indirectly. When MdHB1 is silenced, these TFs are released to activate the expression of MdDFR and MdUFGT and also anthocyanin biosynthesis, resulting in red flesh in 'Granny Smith'.
Collapse
Affiliation(s)
- Yonghua Jiang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cuihua Liu
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dan Yan
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaohong Wen
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanli Liu
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Haojie Wang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jieyu Dai
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yujie Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanfei Liu
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Bin Zhou
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaolin Ren
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| |
Collapse
|
8
|
Shu Y, Tao Y, Wang S, Huang L, Yu X, Wang Z, Chen M, Gu W, Ma H. GmSBH1, a homeobox transcription factor gene, relates to growth and development and involves in response to high temperature and humidity stress in soybean. PLANT CELL REPORTS 2015; 34:1927-37. [PMID: 26205508 DOI: 10.1007/s00299-015-1840-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/24/2015] [Accepted: 07/07/2015] [Indexed: 05/11/2023]
Abstract
KEY MESSAGE GmSBH1 involves in response to high temperature and humidity stress. Homeobox transcription factors are key switches that control plant development processes. Glycine max H1 Sbh1 (GmSBH1) was the first homeobox gene isolated from soybean. In the present study, the full ORF of GmSBH1 was isolated, and the encoded protein was found to be a typical class I KNOX homeobox transcription factor. Subcellular localization and transcriptional activation assays showed that GmSBH1 is a nuclear protein and possesses transcriptional activation activity in the homeodomain. The KNOX1 domain was found to play a clear role in suppressing the transcriptional activation activity of GmSBH1. GmSBH1 showed different expression levels among different soybean tissues and was involved in response to high temperature and humidity (HTH) stress in developing soybean seeds. The overexpression of GmSBH1 in Arabidopsis altered leaf and stoma phenotypes and enhanced seed tolerance to HTH stress. Overall, our results indicated that GmSBH1 is involved in growth, development, and enhances tolerance to pre-harvest seed deterioration caused by HTH stress in soybean.
Collapse
Affiliation(s)
- Yingjie Shu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- College of Agriculture, Anhui Science and Technology University, Fengyang, 233100, China
| | - Yuan Tao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shuang Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Liyan Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xingwang Yu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhankui Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ming Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weihong Gu
- Animal and Plant Introduction and Research Center, Shanghai Agricultural Academy, Shanghai, 201106, People's Republic of China
| | - Hao Ma
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
| |
Collapse
|
9
|
Bhattacharjee A, Ghangal R, Garg R, Jain M. Genome-wide analysis of homeobox gene family in legumes: identification, gene duplication and expression profiling. PLoS One 2015; 10:e0119198. [PMID: 25745864 PMCID: PMC4352023 DOI: 10.1371/journal.pone.0119198] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 01/11/2015] [Indexed: 02/03/2023] Open
Abstract
Homeobox genes encode transcription factors that are known to play a major role in different aspects of plant growth and development. In the present study, we identified homeobox genes belonging to 14 different classes in five legume species, including chickpea, soybean, Medicago, Lotus and pigeonpea. The characteristic differences within homeodomain sequences among various classes of homeobox gene family were quite evident. Genome-wide expression analysis using publicly available datasets (RNA-seq and microarray) indicated that homeobox genes are differentially expressed in various tissues/developmental stages and under stress conditions in different legumes. We validated the differential expression of selected chickpea homeobox genes via quantitative reverse transcription polymerase chain reaction. Genome duplication analysis in soybean indicated that segmental duplication has significantly contributed in the expansion of homeobox gene family. The Ka/Ks ratio of duplicated homeobox genes in soybean showed that several members of this family have undergone purifying selection. Moreover, expression profiling indicated that duplicated genes might have been retained due to sub-functionalization. The genome-wide identification and comprehensive gene expression profiling of homeobox gene family members in legumes will provide opportunities for functional analysis to unravel their exact role in plant growth and development.
Collapse
Affiliation(s)
- Annapurna Bhattacharjee
- Functional and Applied Genomics Laboratory, National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Rajesh Ghangal
- Functional and Applied Genomics Laboratory, National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Rohini Garg
- Functional and Applied Genomics Laboratory, National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| | - Mukesh Jain
- Functional and Applied Genomics Laboratory, National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, India
| |
Collapse
|
10
|
Capella M, Ré DA, Arce AL, Chan RL. Plant homeodomain-leucine zipper I transcription factors exhibit different functional AHA motifs that selectively interact with TBP or/and TFIIB. PLANT CELL REPORTS 2014; 33:955-67. [PMID: 24531799 DOI: 10.1007/s00299-014-1576-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 01/23/2014] [Indexed: 05/05/2023]
Abstract
Different members of the HD-Zip I family of transcription factors exhibit differential AHA-like activation motifs, able to interact with proteins of the basal transcriptional machinery. Homeodomain-leucine zipper proteins are transcription factors unique to plants, classified in four subfamilies. Subfamily I members have been mainly associated to abiotic stress responses. Several ones have been characterized using knockout or overexpressors plants, indicating that they take part in different signal transduction pathways even when their expression patterns are similar and they bind the same DNA sequence. A bioinformatic analysis has revealed the existence of conserved motifs outside the HD-Zip domain, including transactivation AHA motifs. Here, we demonstrate that these putative activation motifs are functional. Four members of the Arabidopsis family were chosen: AtHB1, AtHB7, AtHB12 and AtHB13. All of them exhibited activation activity in yeast and in plants but with different degrees. The protein segment necessary for such activation was different for these four transcription factors as well as the role of the tryptophans they present. When interaction with components of the basal transcription machinery was tested, AtHB1 was able to interact with TBP, AtHB12 interacted with TFIIB, AtHB7 interacted with both, TBP and TFIIB while AtHB13 showed weak interactions with any of them, in yeast two-hybrid as well as in pull-down assays. Transient transformation of Arabidopsis seedlings confirmed the activation capacity and specificity of these transcription factors and showed some differences with the results obtained in yeast. In conclusion, the differential activation functionality of these transcription factors adds an important level of functional divergence of these proteins, and together with their expression patterns, these differences could explain, at least in part, their functional divergence.
Collapse
Affiliation(s)
- Matías Capella
- Instituto de Agrobiotecnología del Litoral, CONICET-UNL, CC 242 Ciudad Universitaria, 3000, Santa Fe, Argentina
| | | | | | | |
Collapse
|
11
|
Su LT, Li JW, Liu DQ, Zhai Y, Zhang HJ, Li XW, Zhang QL, Wang Y, Wang QY. A novel MYB transcription factor, GmMYBJ1, from soybean confers drought and cold tolerance in Arabidopsis thaliana. Gene 2014; 538:46-55. [PMID: 24440241 DOI: 10.1016/j.gene.2014.01.024] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 12/23/2013] [Accepted: 01/02/2014] [Indexed: 11/18/2022]
Abstract
MYB transcription factors play important roles in the regulation of plant growth, developmental metabolism and stress responses. In this study, a new MYB transcription factor gene, GmMYBJ1, was isolated from soybean [Glycine max (L.)]. The GmMYBJ1 cDNA is 1296bp in length with an open reading frame (ORF) of 816 bp encoding for 271 amino acids. The amino acid sequence displays similarities to the typical R2R3 MYB proteins reported in other plants. Transient expression analysis using the GmMYBJ1-GFP fusion gene in onion epidermal cells revealed that the GmMYBJ1 protein is targeted to the nucleus. Quantitative RT-PCR analysis demonstrated that GmMYBJ1 expression was induced by abiotic stresses, such as drought, cold, salt and exogenous abscisic acid (ABA). Compared to wild-type (WT) plants, transgenic Arabidopsis overexpressing GmMYBJ1 exhibited an enhanced tolerance to drought and cold stresses. These results indicate that GmMYBJ1 has the potential to be utilized in transgenic breeding lines to improve abiotic stress tolerance.
Collapse
Affiliation(s)
- Lian-Tai Su
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China
| | - Jing-Wen Li
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China
| | - De-Quan Liu
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China
| | - Ying Zhai
- College of Life Science and Agroforestry, Qiqihaer University, Qiqihaer 161006, Heilongjiang, China
| | - Hai-Jun Zhang
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China
| | - Xiao-Wei Li
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, Jilin, China
| | - Qing-Lin Zhang
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China
| | - Ying Wang
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China.
| | - Qing-Yu Wang
- Jilin Key Laboratory for Crop Genetic Engineering, College of Plant Science, Jilin University, Changchun 130062, Jilin, China.
| |
Collapse
|
12
|
Li Z, Jiang H, Zhou L, Deng L, Lin Y, Peng X, Yan H, Cheng B. Molecular evolution of the HD-ZIP I gene family in legume genomes. Gene 2013; 533:218-28. [PMID: 24095777 DOI: 10.1016/j.gene.2013.09.084] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 09/22/2013] [Accepted: 09/24/2013] [Indexed: 11/26/2022]
Abstract
Homeodomain leucine zipper I (HD-ZIP I) genes were used to increase the plasticity of plants by mediating external signals and regulating growth in response to environmental conditions. The way genomic histories drove the evolution of the HD-ZIP I family in legume species was described; HD-ZIP I genes were searched in Lotus japonicus, Medicago truncatula, Cajanus cajan and Phaseolus vulgaris, and then divided into five clades through phylogenetic analysis. Microsynteny analysis was made based on genomic segments containing the HD-ZIP I genes. Some pairs turned out to conform with syntenic genome regions, while others corresponded to those that were inverted, expanded, or contracted after the divergence of legumes. Besides, we dated their duplications by Ks analysis and demonstrated that all the blocks were formed after the monocot-dicot split; we observed Ka/Ks ratios representing strong purifying selections in the four legume species which might have been followed by gene loss and rearrangement.
Collapse
Affiliation(s)
- Zhen Li
- Key Lab of Crop Biology, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Hao YJ, Wei W, Song QX, Chen HW, Zhang YQ, Wang F, Zou HF, Lei G, Tian AG, Zhang WK, Ma B, Zhang JS, Chen SY. Soybean NAC transcription factors promote abiotic stress tolerance and lateral root formation in transgenic plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2011; 68:302-13. [PMID: 21707801 DOI: 10.1111/j.1365-313x.2011.04687.x] [Citation(s) in RCA: 293] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
NAC transcription factors play important roles in plant growth, development and stress responses. Previously, we identified multiple NAC genes in soybean (Glycine max). Here, we identify the roles of two genes, GmNAC11 and GmNAC20, in stress responses and other processes. The two genes were differentially induced by multiple abiotic stresses and plant hormones, and their transcripts were abundant in roots and cotyledons. Both genes encoded proteins that localized to the nucleus and bound to the core DNA sequence CGT[G/A]. In the protoplast assay system, GmNAC11 acts as a transcriptional activator, whereas GmNAC20 functions as a mild repressor; however, the C-terminal end of GmANC20 has transcriptional activation activity. Over-expression of GmNAC20 enhances salt and freezing tolerance in transgenic Arabidopsis plants; however, GmNAC11 over-expression only improves salt tolerance. Over-expression of GmNAC20 also promotes lateral root formation. GmNAC20 may regulate stress tolerance through activation of the DREB/CBF-COR pathway, and may control lateral root development by altering auxin signaling-related genes. GmNAC11 probably regulates DREB1A and other stress-related genes. The roles of the two GmNAC genes in stress tolerance were further analyzed in soybean transgenic hairy roots. These results provide a basis for genetic manipulation to improve the agronomic traits of important crops.
Collapse
Affiliation(s)
- Yu-Jun Hao
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Wei W, Huang J, Hao YJ, Zou HF, Wang HW, Zhao JY, Liu XY, Zhang WK, Ma B, Zhang JS, Chen SY. Soybean GmPHD-type transcription regulators improve stress tolerance in transgenic Arabidopsis plants. PLoS One 2009; 4:e7209. [PMID: 19789627 PMCID: PMC2747011 DOI: 10.1371/journal.pone.0007209] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Accepted: 09/07/2009] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Soybean [Glycine max (L.) Merr.] is one of the most important crops for oil and protein resource. Improvement of stress tolerance will be beneficial for soybean seed production. PRINCIPAL FINDINGS Six GmPHD genes encoding Alfin1-type PHD finger protein were identified and their expressions differentially responded to drought, salt, cold and ABA treatments. The six GmPHDs were nuclear proteins and showed ability to bind the cis-element "GTGGAG". The N-terminal domain of GmPHD played a major role in DNA binding. Using a protoplast assay system, we find that GmPHD1 to GmPHD5 had transcriptional suppression activity whereas GmPHD6 did not have. In yeast assay, the GmPHD6 can form homodimer and heterodimer with the other GmPHDs except GmPHD2. The N-terminal plus the variable regions but not the PHD-finger is required for the dimerization. Transgenic Arabidopsis plants overexpressing the GmPHD2 showed salt tolerance when compared with the wild type plants. This tolerance was likely achieved by diminishing the oxidative stress through regulation of downstream genes. SIGNIFICANCE These results provide important clues for soybean stress tolerance through manipulation of PHD-type transcription regulator.
Collapse
Affiliation(s)
- Wei Wei
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Jian Huang
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yu-Jun Hao
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Hong-Feng Zou
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Hui-Wen Wang
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Jing-Yun Zhao
- Institute of economic crops, Shanxi Academy of Agricultural Sciences, Fenyang, Shanxi, China
| | - Xue-Yi Liu
- Institute of economic crops, Shanxi Academy of Agricultural Sciences, Fenyang, Shanxi, China
| | - Wan-Ke Zhang
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Biao Ma
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Jin-Song Zhang
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Shou-Yi Chen
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
15
|
Liao Y, Zou HF, Wei W, Hao YJ, Tian AG, Huang J, Liu YF, Zhang JS, Chen SY. Soybean GmbZIP44, GmbZIP62 and GmbZIP78 genes function as negative regulator of ABA signaling and confer salt and freezing tolerance in transgenic Arabidopsis. PLANTA 2008; 228:225-40. [PMID: 18365246 DOI: 10.1007/s00425-008-0731-3] [Citation(s) in RCA: 214] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Accepted: 03/12/2008] [Indexed: 05/03/2023]
Abstract
From soybean plant, 131 bZIP genes were identified and named as GmbZIPs. The GmbZIPs can be classified into ten groups and more than one third of these GmbZIPs are responsive to at least one of the four treatments including ABA, salt, drought and cold stresses. Previous studies have shown that group A bZIP proteins are involved in ABA and stress signaling. We now chose four non-group A genes to study their features. The four proteins GmbZIP44, GmbZIP46, GmbZIP62 and GmbZIP78 belong to the group S, I, C and G, respectively, and can bind to GLM (GTGAGTCAT), ABRE (CCACGTGG) and PB-like (TGAAAA) elements with differential affinity in both the yeast one-hybrid assay and in vitro gel-shift analysis. GmbZIP46 can form homodimer or heterodimer with GmbZIP62 or GmMYB76. Transgenic Arabidopsis plants overexpressing the GmbZIP44, GmbZIP62 or GmbZIP78 showed reduced ABA sensitivity. However, all the transgenic plants were more tolerant to salt and freezing stresses when compared with the Col plants. The GmbZIP44, GmbZIP62 and GmbZIP78 may function in ABA signaling through upregulation of ABI1 and ABI2 and play roles in stress tolerance through regulation of various stress-responsive genes. These results indicate that GmbZIP44, GmbZIP62 and GmbZIP78 are negative regulators of ABA signaling and function in salt and freezing tolerance.
Collapse
Affiliation(s)
- Yong Liao
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101 Beijing, China
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Udvardi MK, Kakar K, Wandrey M, Montanari O, Murray J, Andriankaja A, Zhang JY, Benedito V, Hofer JMI, Chueng F, Town CD. Legume transcription factors: global regulators of plant development and response to the environment. PLANT PHYSIOLOGY 2007; 144:538-49. [PMID: 17556517 PMCID: PMC1914172 DOI: 10.1104/pp.107.098061] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2007] [Accepted: 03/24/2007] [Indexed: 05/15/2023]
|
17
|
Saddic LA, Huvermann B, Bezhani S, Su Y, Winter CM, Kwon CS, Collum RP, Wagner D. The LEAFY target LMI1 is a meristem identity regulator and acts together with LEAFY to regulate expression ofCAULIFLOWER. Development 2006; 133:1673-82. [PMID: 16554366 DOI: 10.1242/dev.02331] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The timing of the switch from vegetative to reproductive development is crucial for species survival. The plant-specific transcription factor and meristem identity regulator LEAFY (LFY) controls this switch in Arabidopsis, in part via the direct activation of two other meristem identity genes, APETALA1 (AP1) and CAULIFLOWER(CAL). We recently identified five new direct LFY targets as candidates for the missing meristem identity regulators that act downstream of LFY. Here, we demonstrate that one of these, the class I homeodomain leucine-zipper transcription factor LMI1, is a meristem identity regulator. LMI1 acts together with LFY to activate CAL expression. The interaction between LFY, LMI1 and CAL resembles a feed-forward loop transcriptional network motif. LMI1 has additional LFY-independent roles in the formation of simple serrated leaves and in the suppression of bract formation. The temporal and spatial expression of LMI1 supports a role in meristem identity and leaf/bract morphogenesis.
Collapse
Affiliation(s)
- Louis A Saddic
- Department of Biology, University of Pennsylvania, Philadelphia, PA 19104-6018, USA
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Wang HW, Zhang JS, Gai JY, Chen SY. Cloning and comparative analysis of the gene encoding diacylglycerol acyltransferase from wild type and cultivated soybean. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2006; 112:1086-97. [PMID: 16432735 DOI: 10.1007/s00122-006-0210-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Accepted: 12/28/2005] [Indexed: 05/05/2023]
Abstract
Diacylglycerol acyltransferase (DGAT), as an important enzyme in triacylglycerol synthesis, catalyzes the final acylation of the Kennedy pathway. In the present study, the GmDGAT gene was cloned from Glycine max by using AtDGAT as a query to search against the soybean EST database and the rapid amplification of cDNA ends (RACE) method. Allelic genes were also isolated from 13 soybean accessions and the divergence of the deduced amino acid sequences were compared. The comparison reveals that although GmDGAT is a highly conserved protein, several differences of insertion/deletion were identified in the N-terminal region of the GmDGATs from various soybean accessions. In the C-terminal regions, a single amino acid mutation specific to both G. max and G. soja was also found. The GmDGAT genomic sequences were further cloned and the number and size of exons in the DGAT genomic sequence were very similar among different plant species, whereas the introns were more diverged. These results may have significance in elucidating the genetic diversity of the GmDGAT among the soybean subgenus.
Collapse
Affiliation(s)
- Hui-Wen Wang
- The National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101 Beijing, China
| | | | | | | |
Collapse
|
19
|
Shinozuka H, Hisano H, Yoneyama S, Shimamoto Y, Jones ES, Forster JW, Yamada T, Kanazawa A. Gene expression and genetic mapping analyses of a perennial ryegrass glycine-rich RNA-binding protein gene suggest a role in cold adaptation. Mol Genet Genomics 2006; 275:399-408. [PMID: 16614778 DOI: 10.1007/s00438-005-0095-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2005] [Accepted: 12/17/2005] [Indexed: 10/25/2022]
Abstract
A perennial ryegrass cDNA clone encoding a putative glycine-rich RNA binding protein (LpGRP1) was isolated from a cDNA library constructed from crown tissues of cold-treated plants. The deduced polypeptide sequence consists of 107 amino acids with a single N-terminal RNA recognition motif (RRM) and a single C-terminal glycine-rich domain. The sequence showed extensive homology to glycine-rich RNA binding proteins previously identified in other plant species. LpGRP1-specific genomic DNA sequence was isolated by an inverse PCR amplification. A single intron which shows conserved locations in plant genes was detected between the sequence motifs encoding RNP-1 and RNP-2 consensus protein domains. A significant increase in the mRNA level of LpGRP1 was detected in root, crown and leaf tissues during the treatment of plants at 4 degrees C, through which freezing tolerance is attained. The increase in the mRNA level was prominent at least 2 h after the commencement of the cold treatment, and persisted for at least 1 week. Changes in mRNA level induced by cold treatment were more obvious than those due to treatments with abscisic acid (ABA) and drought. The LpGRP1 protein was found to localise in the nucleus in onion epidermal cells, suggesting that it may be involved in pre-mRNA processing. The LpGRP1 gene locus was mapped to linkage group 2. Possible roles for the LpGRP1 protein in adaptation to cold environments are discussed.
Collapse
Affiliation(s)
- H Shinozuka
- Graduate School of Agriculture, Hokkaido University, 060-8589 Sapporo, Japan
| | | | | | | | | | | | | | | |
Collapse
|