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Xu G, Cheng Y, Wang X, Dai Z, Kang Z, Ye Z, Pan Y, Zhou L, Xie D, Sun J. Identification of Single Nucleotide Polymorphic Loci and Candidate Genes for Seed Germination Percentage in Okra under Salt and No-Salt Stresses by Genome-Wide Association Study. PLANTS (BASEL, SWITZERLAND) 2024; 13:588. [PMID: 38475435 DOI: 10.3390/plants13050588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/12/2024] [Accepted: 02/15/2024] [Indexed: 03/14/2024]
Abstract
Excessive soil salinity is a major stressor inhibiting crops' growth, development, and yield. Seed germination is a critical stage of crop growth and development, as well as one of the most salt-sensitive stages. Salt stress has a significant inhibitory effect on seed germination. Okra is a nutritious vegetable, but its seed germination percentage (GP) is low, whether under salt stress conditions or suitable conditions. In this study, we used 180 okra accessions and conducted a genome-wide association study (GWAS) on the germination percentage using 20,133,859 single nucleotide polymorphic (SNP) markers under 0 (CK, diluted water), 70 (treatment 1, T1), and 140 mmol/L (treatment 2, T2) NaCl conditions. Using the mixed linear model (MLM) in Efficient Mixed-model Association eXpedated (EMMAX) and Genome-wide Efficient Mixed Model Association (GEMMA) software, 511 SNP loci were significantly associated during germination, of which 167 SNP loci were detected simultaneously by both programs. Among the 167 SNPs, SNP2619493 on chromosome 59 and SNP2692266 on chromosome 44 were detected simultaneously under the CK, T1, and T2 conditions, and were key SNP loci regulating the GP of okra seeds. Linkage disequilibrium block analysis revealed that nsSNP2626294 (C/T) in Ae59G004900 was near SNP2619493, and the amino acid changes caused by nsSNP2626294 led to an increase in the phenotypic values in some okra accessions. There was an nsSNP2688406 (A/G) in Ae44G005470 near SNP2692266, and the amino acid change caused by nsSNP2688406 led to a decrease in phenotypic values in some okra accessions. These results indicate that Ae59G004900 and Ae44G005470 regulate the GP of okra seeds under salt and no-salt stresses. The gene expression analysis further demonstrated these results. The SNP markers and genes that were identified in this study will provide reference for further research on the GP of okra, as well as new genetic markers and candidate genes for cultivating new okra varieties with high GPs under salt and no-salt stress conditions.
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Affiliation(s)
- Gaowen Xu
- School of Life Sciences, Nantong University, Nantong 226019, China
| | - Yujing Cheng
- Jiangsu Yanjiang Institute of Agricultural Sciences, Nantong 226019, China
| | - Xiaoqiu Wang
- Jiangsu Yanjiang Institute of Agricultural Sciences, Nantong 226019, China
| | - Zhigang Dai
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China
| | - Zepei Kang
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China
| | - Zhichao Ye
- School of Life Sciences, Nantong University, Nantong 226019, China
| | - Yangyang Pan
- School of Life Sciences, Nantong University, Nantong 226019, China
| | - Linkang Zhou
- School of Life Sciences, Nantong University, Nantong 226019, China
| | - Dongwei Xie
- School of Life Sciences, Nantong University, Nantong 226019, China
| | - Jian Sun
- School of Life Sciences, Nantong University, Nantong 226019, China
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Li Y, Wang W, Zhang N, Cheng Y, Hussain S, Wang Y, Tian H, Hussain H, Lin R, Yuan Y, Wang C, Wang T, Wang S. Antagonistic Regulation of ABA Responses by Duplicated Tandemly Repeated DUF538 Protein Genes in Arabidopsis. PLANTS (BASEL, SWITZERLAND) 2023; 12:2989. [PMID: 37631202 PMCID: PMC10459309 DOI: 10.3390/plants12162989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023]
Abstract
The plant hormone ABA (abscisic acid) regulates plant responses to abiotic stresses by regulating the expression of ABA response genes. However, the functions of a large portion of ABA response genes have remained unclear. We report in this study the identification of ASDs (ABA-inducible signal peptide-containing DUF538 proteins), a subgroup of DUF538 proteins with a signal peptide, as the regulators of plant responses to ABA in Arabidopsis. ASDs are encoded by four closely related DUF538 genes, with ASD1/ASD2 and ASD3/ASD4 being two pairs of duplicated tandemly repeated genes. The quantitative RT-PCR (qRT-PCR) results showed that the expression levels of ASDs increased significantly in response to ABA as well as NaCl and mannitol treatments, with the exception that the expression level of ASD2 remained largely unchanged in response to NaCl treatment. The results of Arabidopsis protoplast transient transfection assays showed that ASDs were localized on the plasma membrane and in the cytosol and nucleus. When recruited to the promoter of the reporter gene via a fused GD domain, ASDs were able to slightly repress the expression of the co-transfected reporter gene. Seed germination and cotyledon greening assays showed that ABA sensitivity was increased in the transgenic plants that were over-expressing ASD1 or ASD3 but decreased in the transgenic plants that were over-expressing ASD2 or ASD4. On the other hand, ABA sensitivity was increased in the CRISPR/Cas9 gene-edited asd2 single mutants but decreased in the asd3 single mutants. A transcriptome analysis showed that differentially expressed genes in the 35S:ASD2 transgenic plant seedlings were enriched in several different processes, including in plant growth and development, the secondary metabolism, and plant hormone signaling. In summary, our results show that ASDs are ABA response genes and that ASDs are involved in the regulation of plant responses to ABA in Arabidopsis; however, ASD1/ASD3 and ASD2/ASD4 have opposite functions.
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Affiliation(s)
- Yingying Li
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Wei Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China; (W.W.); (S.H.)
| | - Na Zhang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Yuxin Cheng
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Saddam Hussain
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China; (W.W.); (S.H.)
| | - Yating Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Hainan Tian
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Hadia Hussain
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Rao Lin
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Yuan Yuan
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Chen Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Tianya Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
| | - Shucai Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China; (Y.L.); (N.Z.); (Y.C.); (Y.W.); (H.T.); (H.H.); (R.L.); (Y.Y.); (C.W.); (T.W.)
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China; (W.W.); (S.H.)
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Wang Y, Wang W, Jia Q, Tian H, Wang X, Li Y, Hussain S, Hussain H, Wang T, Wang S. BIC2, a Cryptochrome Function Inhibitor, Is Involved in the Regulation of ABA Responses in Arabidopsis. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12112220. [PMID: 37299199 DOI: 10.3390/plants12112220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/18/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
The plant hormone ABA (abscisic acid) is able to regulate plant responses to abiotic stresses via regulating the expression of ABA response genes. BIC1 (Blue-light Inhibitor of Cryptochromes 1) and BIC2 have been identified as the inhibitors of plant cryptochrome functions, and are involved in the regulation of plant development and metabolism in Arabidopsis . In this study, we report the identification of BIC2 as a regulator of ABA responses in Arabidopsis . RT-PCR (Reverse Transcription-Polymerase Chain Reaction) results show that the expression level of BIC1 remained largely unchanged, but that of BIC2 increased significantly in response to ABA treatment. Transfection assays in Arabidopsis protoplasts show that both BIC1 and BIC2 were mainly localized in the nucleus, and were able to activate the expression of the co-transfected reporter gene. Results in seed germination and seedling greening assays show that ABA sensitivity was increased in the transgenic plants overexpressing BIC2, but increased slightly, if any, in the transgenic plants overexpressing BIC1. ABA sensitivity was also increased in the bic2 single mutants in seedling greening assays, but no further increase was observed in the bic1 bic2 double mutants. On the other hand, in root elongation assays, ABA sensitivity was decreased in the transgenic plants overexpressing BIC2, as well as the bic2 single mutants, but no further decrease was observed in the bic1 bic2 double mutants. By using qRT-PCR (quantitative RT-PCR), we further examined how BIC2 may regulate ABA responses in Arabidopsis , and found that inhibition of ABA on the expression of the ABA receptor genes PYL4 (PYR1-Like 4) and PYL5 were decreased, but promotion of ABA on the expression of the protein kinase gene SnRK2.6 (SNF1-Related Protein Kinases 2.6) was enhanced in both the bic1 bic2 double mutants and 35S:BIC2 overexpression transgenic plants. Taken together, our results suggest that BIC2 regulates ABA responses in Arabidopsis possibly by affecting the expression of ABA signaling key regulator genes.
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Affiliation(s)
- Yating Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Wei Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China
| | - Qiming Jia
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Hainan Tian
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Xutong Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China
| | - Yingying Li
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Saddam Hussain
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Hadia Hussain
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Tianya Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun 130024, China
| | - Shucai Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi 276000, China
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Wang S, Chen H, Huang Y, Zhang X, Chen Y, Du H, Wang H, Qin F, Ding S. Ubiquitin E3 ligase AtCHYR2 functions in glucose regulation of germination and post-germinative growth in Arabidopsis thaliana. PLANT CELL REPORTS 2023; 42:989-1002. [PMID: 36991149 DOI: 10.1007/s00299-023-03008-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 03/19/2023] [Indexed: 05/12/2023]
Abstract
KEY MESSAGE Cytoplasm-localized RING ubiquitin E3 ligase AtCHYR2 involved in plant glucose responses during germination and post-germinative growth. CHY ZINC FINGER AND RING PROTEIN (CHYR) containing both a CHY zinc finger and a C3H2C3-type RING domain plays important roles in plant drought tolerance and the abscisic acid (ABA) response; however, their functions in sugar signaling pathways are less studied. Here, we report a glucose (Glc) response gene AtCHYR2, a homolog of RZFP34/CHYR1, which is induced by various abiotic stresses, ABA, and sugar treatments. In vitro, we demonstrated that AtCHYR2 is a cytoplasm-localized RING ubiquitin E3 ligase. Overexpression of AtCHYR2 led to hypersensitivity to Glc and enhanced Glc-mediated inhibition of cotyledon greening and post-germinative growth. Contrastingly, AtCHYR2 loss-of-function plants were insensitive to Glc-regulated seed germination and primary root growth, suggesting that AtCHYR2 is a positively regulator of the plant glucose response. Additionally, physiological analyses showed that overexpression AtCHYR2 increased stomata aperture and photosynthesis under normal condition, and promoted accumulation of endogenous soluble sugar and starch in response to high Glc. Genome-wide RNA sequencing analysis showed that AtCHYR2 affects a major proportion of Glc-responsive genes. Particularly, sugar marker gene expression analysis suggested that AtCHYR2 enhances the Glc response via a signaling pathway dependent on glucose metabolism. Taken together, our findings show that a novel RING ubiquitin E3 ligase, AtCHYR2, plays an important role in glucose responses in Arabidopsis.
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Affiliation(s)
- Shengyong Wang
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China
| | - Huili Chen
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China
| | - Yujie Huang
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China
| | - Xiaotian Zhang
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China
| | - Yuhang Chen
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China
| | - Hewei Du
- College of Life Science, Yangtze University, Jingzhou, 434025, China
| | - Hongwei Wang
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China.
| | - Feng Qin
- Center for Crop Functional Genomics and Molecular Breeding, China Agricultural University, Beijing, 100193, China.
| | - Shuangcheng Ding
- MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction by Ministry and Province), College of Agriculture, Yangtze University, 1 Jingmi Road, Jingzhou, 434025, Hubei, China.
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou, 434025, China.
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Kumar S, Shah SH, Vimala Y, Jatav HS, Ahmad P, Chen Y, Siddique KHM. Abscisic acid: Metabolism, transport, crosstalk with other plant growth regulators, and its role in heavy metal stress mitigation. FRONTIERS IN PLANT SCIENCE 2022; 13:972856. [PMID: 36186053 PMCID: PMC9515544 DOI: 10.3389/fpls.2022.972856] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 08/17/2022] [Indexed: 05/06/2023]
Abstract
Heavy metal (HM) stress is threatening agricultural crops, ecological systems, and human health worldwide. HM toxicity adversely affects plant growth, physiological processes, and crop productivity by disturbing cellular ionic balance, metabolic balance, cell membrane integrity, and protein and enzyme activities. Plants under HM stress intrinsically develop mechanisms to counter the adversities of HM but not prevent them. However, the exogenous application of abscisic acid (ABA) is a strategy for boosting the tolerance capacity of plants against HM toxicity by improving osmolyte accumulation and antioxidant machinery. ABA is an essential plant growth regulator that modulates various plant growth and metabolic processes, including seed development and germination, vegetative growth, stomatal regulation, flowering, and leaf senescence under diverse environmental conditions. This review summarizes ABA biosynthesis, signaling, transport, and catabolism in plant tissues and the adverse effects of HM stress on crop plants. Moreover, we describe the role of ABA in mitigating HM stress and elucidating the interplay of ABA with other plant growth regulators.
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Affiliation(s)
- Sandeep Kumar
- Plant Physiology and Tissue Culture Laboratory, Department of Botany, Chaudhary Charan Singh University, Meerut, India
| | - Sajad Hussain Shah
- Plant Physiology and Tissue Culture Laboratory, Department of Botany, Chaudhary Charan Singh University, Meerut, India
| | - Yerramilli Vimala
- Plant Physiology and Tissue Culture Laboratory, Department of Botany, Chaudhary Charan Singh University, Meerut, India
| | - Hanuman Singh Jatav
- Soil Science and Agricultural Chemistry, Sri Karan Narendra Agriculture University Jobner, Jaipur, India
| | - Parvaiz Ahmad
- Department of Botany, GDC Pulwama, Jammu and Kashmir, India
| | - Yinglong Chen
- The UWA Institute of Agriculture and School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Kadambot H. M. Siddique
- The UWA Institute of Agriculture and School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
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Li Z, Xiao W, Chen H, Zhu G, Lv F. Transcriptome Analysis Reveals Endogenous Hormone Changes during Spike Development in Phalaenopsis. Int J Mol Sci 2022; 23:ijms231810461. [PMID: 36142373 PMCID: PMC9499595 DOI: 10.3390/ijms231810461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 08/29/2022] [Accepted: 09/02/2022] [Indexed: 11/16/2022] Open
Abstract
Phalaenopsis orchids are popular worldwide due to their high ornamental and economic value; the spike and inflorescence formation of their flowers could be efficiently controlled under proper conditions. In this study, transcriptomic profiles and endogenous hormone changes were investigated to better understand the spike formation of Phalaenopsis. Morphological observations revealed four spike initiation statuses (i.e., S0: the status refers to axillary buds remaining dormant in the leaf axils; S1: the status refers to the 0.5 cm-long initial spike; S2: the status refers to the 1 cm-long spike; S3: the status refers to the 3 cm-long spike) during the process of spike development, while anatomical observations revealed four related statuses of inflorescence primordium differentiation. A total of 4080 differentially expressed genes were identified based on pairwise comparisons of the transcriptomic data obtained from the S0 to S3 samples; high levels of differential gene expression were mostly observed in S1 vs. S2, followed by S0 vs. S1. Then, the contents of 12 endogenous hormones (e.g., irindole-3-acetic acid (IAA), salicylic acid (SA), abscisic acid (ABA), gibberellins, and cytokinins) were measured. The results showed that the ABA content was decreased from S0 to S1, while the gibberellic acid 1 (GA1) content exhibited an opposite trend, indicating the reduction in ABA levels combined with the increase in GA1 levels in S0 promoted the axillary bud dormancy breaking, preparing for the following spike initiation. The GA20 oxidase and ABA 8'-hydroxylase genes, which are involved in endogenous hormone metabolism and signaling pathways, displayed similar expression patterns, suggesting they were probably the key genes participating in the GA and ABA regulation. Taken together, the findings of this study indicate that GA and ABA may be the key endogenous hormones breaking the dormancy and promoting the germination of axillary buds in Phalaenopsis.
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Liu S, Long J, Zhang L, Gao J, Dong T, Wang Y, Peng C. Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation. BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2101942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Siwen Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Jianmei Long
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
| | - Liding Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Jiayu Gao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Tiantian Dong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
| | - Ying Wang
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
| | - Changcao Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, PR China
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, PR China
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Yang B, Chen M, Zhan C, Liu K, Cheng Y, Xie T, Zhu P, He Y, Zeng P, Tang H, Tsugama D, Chen S, Zhang H, Cheng J. Identification of OsPK5 involved in rice glycolytic metabolism and GA/ABA balance for improving seed germination via genome-wide association study. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:3446-3461. [PMID: 35191960 PMCID: PMC9162179 DOI: 10.1093/jxb/erac071] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 02/19/2022] [Indexed: 06/12/2023]
Abstract
Seed germination plays a pivotal role in the plant life cycle, and its precise regulatory mechanisms are not clear. In this study, 19 quantitative trait loci (QTLs) associated with rice seed germination were identified through genome-wide association studies (GWAS) of the following traits in 2016 and 2017: germination rate (GR) at 3, 5, and 7 days after imbibition (DAI) and germination index (GI). Two major stable QTLs, qSG4 and qSG11.1, were found to be associated with GR and GI over 2 continuous years. Furthermore, OsPK5, encoding a pyruvate kinase, was shown to be a crucial regulator of seed germination in rice, and might be a causal gene of the key QTL qSG11.1, on chromosome 11. Natural variation in OsPK5 function altered the activity of pyruvate kinase. The disruption of OsPK5 function resulted in slow germination and seedling growth during seed germination, blocked glycolytic metabolism, caused glucose accumulation, decreased energy levels, and affected the GA/ABA balance. Taken together, our results provide novel insights into the roles of OsPK5 in seed germination, and facilitate its application in rice breeding to improve seed vigour.
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Affiliation(s)
| | | | | | - Kexin Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Yanhao Cheng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Ting Xie
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Peiwen Zhu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying He
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Peng Zeng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Haijuan Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
| | - Daisuke Tsugama
- Asian Natural Environmental Science Center (ANESC), The University of Tokyo, 1-1-1 Midori-cho, Nishitokyo-shi, Tokyo 188-0002, Japan
| | - Sunlu Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Jiangsu Province Engineering Research Center of Seed Industry Science and Technology, Cyrus Tang Innovation Center for Seed Industry, Nanjing Agricultural University, Nanjing 210095, China
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Zhang J, Qian JY, Bian YH, Liu X, Wang CL. Transcriptome and Metabolite Conjoint Analysis Reveals the Seed Dormancy Release Process in Callery Pear. Int J Mol Sci 2022; 23:ijms23042186. [PMID: 35216299 PMCID: PMC8878392 DOI: 10.3390/ijms23042186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/07/2022] [Accepted: 02/14/2022] [Indexed: 01/09/2023] Open
Abstract
Seed dormancy transition is a vital developmental process for seedling propagation and agricultural production. The process is precisely regulated by diverse endogenous genetic factors and environmental cues. Callery pear (Pyrus calleryana Decne) is an important rootstock species that requires cold stratification to break seed dormancy, but the mechanisms underlying pear seed dormancy release are not yet fully understood. Here, we analyzed the transcriptome profiles at three different stages of cold stratification in callery pear seeds using RNA sequencing combined with phytohormone and sugar content measurements. Significant alterations in hormone contents and carbohydrate metabolism were observed and reflected the dormancy status of the seeds. The expressions of genes related to plant hormone metabolism and signaling transduction, including indole-3-acetic acid (IAA) biosynthesis (ASAs, TSA, NITs, YUC, and AAO) genes as well as several abscisic acid (ABA) and gibberellic acid (GA) catabolism and signaling transduction genes (CYP707As, GA2ox, and DELLAs), were consistent with endogenous hormone changes. We further found that several genes involved in cytokinin (CTK), ethylene (ETH), brassionolide (BR), and jasmonic acid (JA) metabolism and signaling transduction were differentially expressed and integrated in pear seed dormancy release. In accordance with changes in starch and soluble sugar contents, the genes associated with starch and sucrose metabolism were significantly up-regulated during seed dormancy release progression. Furthermore, the expression levels of genes involved in lipid metabolism pathways were also up-regulated. Finally, 447 transcription factor (TF) genes (including ERF, bHLH, bZIP, NAC, WRKY, and MYB genes) were observed to be differentially expressed during seed cold stratification and might relate to pear seed dormancy release. Our results suggest that the mechanism underlying pear seed dormancy release is a complex, transcriptionally regulated process involving hormones, sugars, lipids, and TFs.
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Comparative transcriptomic and physiological analyses of weedy rice and cultivated rice to identify vital differentially expressed genes and pathways regulating the ABA response. Sci Rep 2021; 11:12881. [PMID: 34145345 PMCID: PMC8213743 DOI: 10.1038/s41598-021-92504-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/03/2021] [Indexed: 01/15/2023] Open
Abstract
Weedy rice is a valuable germplasm resource characterized by its high tolerance to both abiotic and biotic stresses. Abscisic acid (ABA) serves as a regulatory signal in plant cells as part of their adaptive response to stress. However, a global understanding of the response of weedy rice to ABA remains to be elucidated. In the present study, the sensitivity to ABA of weedy rice (WR04-6) was compared with that of temperate japonica Shennong9816 (SN9816) in terms of seed germination and post-germination growth via the application of exogenous ABA and diniconazole, an inhibitor of ABA catabolism. Physiological analysis and a transcriptomic comparison allowed elucidation of the molecular and physiological mechanisms associated with continuous ABA and diniconazole treatment. WR04-6 was found to display higher ABA sensitivity than SN9816, resulting in the rapid promotion of antioxidant enzyme activity. Comparative transcriptomic analyses indicated that the number of differentially expressed genes (DEGs) in WR04-6 seedlings treated with 2 μM ABA or 10 μM diniconazole was greater than that in SN9816 seedlings. Genes involved in stress defense, hormone signal transduction, and glycolytic and citrate cycle pathways were highly expressed in WR04-6 in response to ABA and diniconazole. These findings provide new insight into key processes mediating the ABA response between weedy and cultivated rice.
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Shi XP, Ren JJ, Qi HD, Lin Y, Wang YY, Li DF, Kong LJ, Wang XL. Plant-Specific AtS40.4 Acts as a Negative Regulator in Abscisic Acid Signaling During Seed Germination and Seedling Growth in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2021; 12:622201. [PMID: 33613604 PMCID: PMC7889505 DOI: 10.3389/fpls.2021.622201] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/15/2021] [Indexed: 06/01/2023]
Abstract
Abscisic acid (ABA) is an important phytohormone regulating plant growth, development and stress responses. A multitude of key factors implicated in ABA signaling have been identified; however, the regulation network of these factors needs for further information. AtS40.4, a plant-specific DUF584 domain-containing protein, was identified previously as a senescence regulator in Arabidopsis. In this study, our finding showed that AtS40.4 was negatively involved in ABA signaling during seed germination and early seedling growth. AtS40.4 was highly expressed in seeds and seedlings, and the expression level was promoted by ABA. AtS40.4 was localized both in the nucleus and the cytoplasm. Moreover, the subcellular localization pattern of AtS40.4 was affected by ABA. The knockdown mutants of AtS40.4 exhibited an increased sensitivity to ABA, whereas the overexpression of AtS40.4 decreased the ABA response during seed germination and seedling growth of Arabidopsis. Furthermore, AtS40.4 was involved in ABRE-dependent ABA signaling and influenced the expression levels of ABA INSENTIVE (ABI)1-5 and SnRK2.6. Further genetic evidence demonstrated that AtS40.4 functioned upstream of ABI4. These findings support the notion that AtS40.4 is a novel negative regulator of the ABA response network during seed germination and early seedling growth.
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Affiliation(s)
- Xiao-Pu Shi
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- Biology and Food Engineering School, Fuyang Normal University, Fuyang, China
| | - Jing-Jing Ren
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Hao-Dong Qi
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Yi Lin
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Yu-Yi Wang
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - De-Feng Li
- Shandong Lufeng Group Co., Ltd., Anqiu, China
| | - Lan-Jing Kong
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Xiu-Ling Wang
- National Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
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Okazawa A, Wakabayashi T, Muranaka T, Sugimoto Y, Ohta D. The effect of nojirimycin on the transcriptome of germinating Orobanche minor seeds. JOURNAL OF PESTICIDE SCIENCE 2020; 45:230-237. [PMID: 33304192 PMCID: PMC7691558 DOI: 10.1584/jpestics.d20-057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 09/29/2020] [Indexed: 06/02/2023]
Abstract
Orobanchaceae root parasitic weeds cause serious agricultural damage worldwide. Although numerous studies have been conducted to establish an effective control strategy for the growth and spread of root parasitic weeds, no practical method has been developed so far. Previously, metabolomic analyses were conducted on germinating seeds of a broomrape, Orobanche minor, to find novel targets for its selective control. Interestingly, planteose metabolism was identified as a possible target, and nojirimycin (NJ) selectively inhibited the germination of O. minor by intercepting planteose metabolism, although its precise mode of action was unclear. Here, transcriptome analysis by RNA-Seq was conducted to obtain molecular insight into the effects of NJ on germinating O. minor seeds. Differential gene expression analysis results suggest that NJ alters sugar metabolism and/or signaling, which is required to promote seed germination. This finding will contribute to understanding the effect of NJ and establishing a novel strategy for parasitic weed control.
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Affiliation(s)
- Atsushi Okazawa
- Department of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Takatoshi Wakabayashi
- Department of Biotechnology, Graduate School of Engineering, Osaka University
- Department of Agrobioscience, Graduate School of Agricultural Sciences, Kobe University
| | - Toshiya Muranaka
- Department of Biotechnology, Graduate School of Engineering, Osaka University
| | - Yukihiro Sugimoto
- Department of Agrobioscience, Graduate School of Agricultural Sciences, Kobe University
| | - Daisaku Ohta
- Department of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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Zhao PX, Miao ZQ, Zhang J, Chen SY, Liu QQ, Xiang CB. Arabidopsis MADS-box factor AGL16 negatively regulates drought resistance via stomatal density and stomatal movement. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:6092-6106. [PMID: 32594177 DOI: 10.1093/jxb/eraa303] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/19/2020] [Indexed: 05/26/2023]
Abstract
Drought is one of the most important environmental factors limiting plant growth and productivity. The molecular mechanisms underlying plant drought resistance are complex and not yet fully understood. Here, we show that the Arabidopsis MADS-box transcription factor AGL16 acts as a negative regulator in drought resistance by regulating stomatal density and movement. Loss-of-AGL16 mutants were more resistant to drought stress and had higher relative water content, which was attributed to lower leaf stomatal density and more sensitive stomatal closure due to higher leaf ABA levels compared with the wild type. AGL16-overexpressing lines displayed the opposite phenotypes. AGL16 is preferentially expressed in guard cells and down-regulated in response to drought stress. The expression of CYP707A3 and AAO3 in ABA metabolism and SDD1 in stomatal development was altered in agl16 and overexpression lines, making them potential targets of AGL16. Using chromatin immunoprecipitation, transient transactivation, yeast one-hybrid, and electrophoretic mobility shift assays, we demonstrated that AGL16 was able to bind the CArG motifs in the promoters of the CYP707A3, AAO3, and SDD1 and regulate their transcription, leading to altered leaf stomatal density and ABA levels. Taking our findings together, AGL16 acts as a negative regulator of drought resistance by modulating leaf stomatal density and ABA accumulation.
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Affiliation(s)
- Ping-Xia Zhao
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, Hefei, Anhui Province, China
| | - Zi-Qing Miao
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, Hefei, Anhui Province, China
| | - Jing Zhang
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, Hefei, Anhui Province, China
| | - Si-Yan Chen
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, Hefei, Anhui Province, China
| | - Qian-Qian Liu
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, Hefei, Anhui Province, China
| | - Cheng-Bin Xiang
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, The Innovation Academy of Seed Design, Chinese Academy of Sciences, Hefei, Anhui Province, China
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Yu B, Wang Y, Zhou H, Li P, Liu C, Chen S, Peng Y, Zhang Y, Teng S. Genome-wide binding analysis reveals that ANAC060 directly represses sugar-induced transcription of ABI5 in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 103:965-979. [PMID: 32314488 DOI: 10.1111/tpj.14777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/18/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
The sugar status of a plant acts as a signal affecting growth and development. The phenomenon by which high levels of sugars inhibit seedling establishment has been widely used to gain insight into sugar-signaling pathways. Natural allelic variation has been identified at the ANAC060 locus. The Arabidopsis Columbia ecotype produces a short ANAC060 protein without a transmembrane domain that is constitutively located to the nucleus, causing sugar insensitivity when overexpressed. In this study, we generated a genome-wide DNA-binding map of ANAC060 via chromatin immunoprecipitation sequencing using transgenic lines that express a functional ANAC060-GFP fusion protein in an anac060 background. A total of 3282 genes associated with ANAC060-binding sites were identified. These genes were enriched in biotic and abiotic stress responses, and the G-box binding motif was highly enriched in ANAC060-bound genomic regions. Expression microarray analysis resulted in the identification of 8350 genes whose activities were altered in the anac060 mutant and upon sugar treatment. Cluster analysis revealed that ANAC060 attenuates sugar-regulated gene expression. Direct target genes of ANAC060 included equivalent numbers of genes that were upregulated or downregulated by ANAC060. The various functions of these target genes indicate that ANAC060 has several functions. Our results demonstrate that ANAC060 directly binds to the promoter of ABI5 and represses the sugar-induced transcription of ABI5. Genetic data indicate that ABI5 is epistatic to ANAC060 in both sugar and abscisic acid responses.
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Affiliation(s)
- Bo Yu
- Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049, China
| | - Yuejun Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049, China
| | - Hua Zhou
- Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Ping Li
- Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Chunmei Liu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049, China
| | - Sunlu Chen
- Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, 210095, China
| | - Yu Peng
- Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
| | - Yijing Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049, China
| | - Sheng Teng
- Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032, China
- University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049, China
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15
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Ikeya S, Aoyanagi T, Ishizuka I, Takeuchi A, Kozaki A. Nitrate Promotes Germination Under Inhibition by NaCl or High Concentration of Glucose. PLANTS 2020; 9:plants9060707. [PMID: 32498308 PMCID: PMC7355496 DOI: 10.3390/plants9060707] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/16/2020] [Accepted: 05/29/2020] [Indexed: 11/16/2022]
Abstract
Seed germination, one of the most important stages in a plant’s life cycle, can be affected by abiotic stresses, such as salinity. The plant hormone abscisic acid (ABA) and high concentrations of glucose are also known to inhibit germination. In contrast, nitrate is known to stimulate germination in many plants. However, this stimulatory effect has not yet been investigated in the presence of inhibitory effects caused by abiotic stresses, ABA, and glucose. In this study, we show that nitrate can alleviate the inhibitory effects of sodium chloride (NaCl) or high concentrations of glucose on seed germination in Arabidopsis, while it was not able to promote germination that was inhibited by exogenous ABA and mannitol (an inducer of osmotic stress). An analysis of the gene expression involved in the regulation of germination showed that GA20ox1, encoding the gibberellin (GA) synthesis enzyme, SPATULA (SPT), encoding a bHLH transcription factor, and CYP707A2, encoding an ABA catabolic enzyme, were significantly upregulated by the addition of KNO3 in the presence of NaCl or glucose. Our results suggest the possibility that these genes are involved in the nitrate-mediated control of seed germination in the presence of NaCl or glucose.
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Affiliation(s)
- Shun Ikeya
- Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; (S.I.); (T.A.)
| | - Takuya Aoyanagi
- Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; (S.I.); (T.A.)
| | | | | | - Akiko Kozaki
- Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; (S.I.); (T.A.)
- Correspondence: ; Tel.: +81-54-238-4957; Fax: +81-54-238-4957
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16
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Zhang Y, Wang X, Luo Y, Zhang L, Yao Y, Han L, Chen Z, Wang L, Li Y. OsABA8ox2, an ABA catabolic gene, suppresses root elongation of rice seedlings and contributes to drought response. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.cj.2019.08.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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17
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Zhang H, Liu X, Yang X, Wu H, Zhu J, Zhang H. miRNA-mRNA Integrated Analysis Reveals Roles for miRNAs in a Typical Halophyte, Reaumuria soongorica, during Seed Germination under Salt Stress. PLANTS 2020; 9:plants9030351. [PMID: 32164348 PMCID: PMC7154850 DOI: 10.3390/plants9030351] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 01/02/2023]
Abstract
MicroRNAs (miRNAs) are endogenous small RNAs that play a crucial role in plant growth, development, and environmental stress responses. Reaumuria soongorica is a typical halophyte that is widely distributed in saline–alkali desert regions. Under salt stress, R. soongorica can complete germination, a critical biological process in the life cycle of seed plants. To identify miRNAs and predict target mRNAs involved in seed germination during salt stress, nine small-RNA libraries were constructed and analyzed from R. soongorica seeds treated with various concentrations of NaCl. We also obtained transcriptome data under the same treatment conditions. Further analysis identified 88 conserved miRNAs representing 25 defined families and discovered 13 novel miRNAs from nine libraries. A co-expression analysis was performed on the same samples to identify putative miRNA–mRNA interactions that were responsive to salt stress. A comparative analysis of expression during germination under 273 (threshold) and 43 mM (optimal) NaCl treatments identified 13 differentially expressed miRNAs and 23 corresponding target mRNAs, while a comparison between 43 mM NaCl and non-salt-stress conditions uncovered one differentially expressed miRNA and one corresponding target mRNA. These results provide basic data for further study of molecular mechanisms involved in the germination of salt-stressed R. soongorica seeds, and also provide a reference for the improvement of salt tolerance during plant germination.
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Affiliation(s)
- Huilong Zhang
- Research Center of Saline and Alkali Land of State Forestry and Grassland Administration, Beijing 100091, China; (H.Z.); (X.L.); (X.Y.); (H.W.)
- Tianjin Research Institute of Forestry of Chinese Academy of Forestry, Tianjin 300450, China
| | - Xiaowei Liu
- Research Center of Saline and Alkali Land of State Forestry and Grassland Administration, Beijing 100091, China; (H.Z.); (X.L.); (X.Y.); (H.W.)
- Tianjin Research Institute of Forestry of Chinese Academy of Forestry, Tianjin 300450, China
| | - Xiuyan Yang
- Research Center of Saline and Alkali Land of State Forestry and Grassland Administration, Beijing 100091, China; (H.Z.); (X.L.); (X.Y.); (H.W.)
- Tianjin Research Institute of Forestry of Chinese Academy of Forestry, Tianjin 300450, China
| | - Haiwen Wu
- Research Center of Saline and Alkali Land of State Forestry and Grassland Administration, Beijing 100091, China; (H.Z.); (X.L.); (X.Y.); (H.W.)
- Tianjin Research Institute of Forestry of Chinese Academy of Forestry, Tianjin 300450, China
| | - Jianfeng Zhu
- Research Center of Saline and Alkali Land of State Forestry and Grassland Administration, Beijing 100091, China; (H.Z.); (X.L.); (X.Y.); (H.W.)
- Tianjin Research Institute of Forestry of Chinese Academy of Forestry, Tianjin 300450, China
- Correspondence: (J.Z.); (H.Z.); Tel.: +86-10-6288-8900 (J.Z.); +86-10-6288-9343 (H.Z.)
| | - Huaxin Zhang
- Research Center of Saline and Alkali Land of State Forestry and Grassland Administration, Beijing 100091, China; (H.Z.); (X.L.); (X.Y.); (H.W.)
- Tianjin Research Institute of Forestry of Chinese Academy of Forestry, Tianjin 300450, China
- Correspondence: (J.Z.); (H.Z.); Tel.: +86-10-6288-8900 (J.Z.); +86-10-6288-9343 (H.Z.)
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Chi J, Guo M, Zhang C, Zhang Y, Ai S, Hou J, Wu P, Li X. Glucose oxidase and Au nanocluster co-encapsulated metal–organic frameworks as a sensitive colorimetric sensor for glucose based on a cascade reaction. NEW J CHEM 2020. [DOI: 10.1039/c9nj06339k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The GOx & AuNCs@ZIF-8 composite was simply obtained as a colorimetric glucose sensor with high sensitivity and selectivity and long-term storage stability.
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Affiliation(s)
- Jingtian Chi
- College of Food Science and Engineering
- Shandong Agricultural University
- Taian
- P. R. China
| | - Manli Guo
- College of Food Science and Engineering
- Shandong Agricultural University
- Taian
- P. R. China
| | - Chi Zhang
- College of Chemistry and Material Science
- Shandong Agricultural University
- Taian
- P. R. China
| | - Yuanhong Zhang
- College of Chemistry and Material Science
- Shandong Agricultural University
- Taian
- P. R. China
| | - Shiyun Ai
- College of Chemistry and Material Science
- Shandong Agricultural University
- Taian
- P. R. China
| | - Juying Hou
- College of Chemistry and Material Science
- Shandong Agricultural University
- Taian
- P. R. China
| | - Peng Wu
- College of Food Science and Engineering
- Shandong Agricultural University
- Taian
- P. R. China
| | - Xiangyang Li
- College of Food Science and Engineering
- Shandong Agricultural University
- Taian
- P. R. China
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Hwang SG, Lee CY, Tseng CS. Heterologous expression of rice 9-cis-epoxycarotenoid dioxygenase 4 (OsNCED4) in Arabidopsis confers sugar oversensitivity and drought tolerance. BOTANICAL STUDIES 2018; 59:2. [PMID: 29335785 PMCID: PMC5768580 DOI: 10.1186/s40529-018-0219-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/10/2018] [Indexed: 05/11/2023]
Abstract
BACKGROUND The 9-cis-epoxycarotenoid dioxygenases OsNCED4 was cloned from rice in conjunction with OsNCED 1-3 and 5, of which 3 has been shown to function in ABA biosynthesis and alteration of leaf morphology. In higher plants, NCEDs have been shown to be key enzymes controlling ABA biosynthesis and belong to a differentially expressed gene family. Aside from OsNCED3, it remains largely unknown if other OsNCED genes are involved in ABA biosynthesis in rice. Thus, transgenic Arabidopsis plants overexpressing OsNCED4 were generated in the 129B08/nced3 mutant background to explore OsNCED4 function in ABA biosynthesis. RESULTS Heterologous expression of OsNCED4 in Arabidopsis increased ABA levels and altered plant size and leaf shape, delayed seed germination, caused sugar oversensitivity in post-germination growth, and enhanced tolerance to drought. The native OsNCED3 and OsNCED4 promoters were expressed in an overlapping pattern in rice seeds and young seedlings, suggesting possible functional redundancy between OsNCED3 and OsNCED4. At the one-leaf stage, similar regulation of OsNCED3 and OsNCED4 gene expression in roots or leaves in response to moderate salt stress (150 mM NaCl) was observed. CONCLUSION Like OsNCED3, OsNCED4 is functionally active in ABA biosynthesis in rice. OsNCED3 and OsNCED4 might play redundant roles in controlling ABA biosynthesis in rice, as suggested by GUS staining assay, but this should be further analyzed through complementation of rice NCED knockout mutants.
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Affiliation(s)
- San-Gwang Hwang
- Department of Horticulture, National Chung Hsing University, 145 Xingda Road, South District, Taichung, 40227 Taiwan, ROC
| | - Chia-Yun Lee
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529 Taiwan, ROC
| | - Ching-Shan Tseng
- Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan, No.189, Zhongzheng Road, Wufeng District, Taichung, 41362 Taiwan, ROC
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20
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Misra BB, Acharya BR, Granot D, Assmann SM, Chen S. The guard cell metabolome: functions in stomatal movement and global food security. FRONTIERS IN PLANT SCIENCE 2015; 6:334. [PMID: 26042131 PMCID: PMC4436583 DOI: 10.3389/fpls.2015.00334] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 04/28/2015] [Indexed: 05/06/2023]
Abstract
Guard cells represent a unique single cell-type system for the study of cellular responses to abiotic and biotic perturbations that affect stomatal movement. Decades of effort through both classical physiological and functional genomics approaches have generated an enormous amount of information on the roles of individual metabolites in stomatal guard cell function and physiology. Recent application of metabolomics methods has produced a substantial amount of new information on metabolome control of stomatal movement. In conjunction with other "omics" approaches, the knowledge-base is growing to reach a systems-level description of this single cell-type. Here we summarize current knowledge of the guard cell metabolome and highlight critical metabolites that bear significant impact on future engineering and breeding efforts to generate plants/crops that are resistant to environmental challenges and produce high yield and quality products for food and energy security.
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Affiliation(s)
- Biswapriya B. Misra
- Department of Biology, Genetics Institute, Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL, USA
| | | | - David Granot
- Department of Vegetable Research, Institute of Plant Sciences, Agricultural Research Organization, Bet-Dagan, Israel
| | | | - Sixue Chen
- Department of Biology, Genetics Institute, Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL, USA
- Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, USA
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Leng P, Yuan B, Guo Y. The role of abscisic acid in fruit ripening and responses to abiotic stress. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:4577-88. [PMID: 24821949 DOI: 10.1093/jxb/eru204] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The phytohormone abscisic acid (ABA) plays a crucial role not only in fruit development and ripening, but also in adaptive responses to biotic and abiotic stresses. In these processes, the actions of ABA are under the control of complex regulatory mechanisms involving ABA metabolism, signal transduction, and transport. The endogenous ABA content is determined by the dynamic balance between biosynthesis and catabolism, processes which are regulated by 9-cis-epoxycarotenoid dioxygenase (NCED) and ABA 8'-hydroxylase (CYP707A), respectively. ABA conjugation by cytosolic UDP-glucosyltransferases, or release by β-glucosidases, is also important for maintaining ABA homeostasis. Recently, multiple putative ABA receptors localized at different subcellular sites have been reported. Among these is a major breakthrough in the field of ABA signalling-the identification of a signalling cascade involving the PYR/PYL/RCAR protein family, the type 2C protein phosphatases (PP2Cs), and subfamily 2 of the SNF1-related kinases (SnRK2s). With regard to transport, two ATP-binding cassette (ABC) proteins and two ABA transporters in the nitrate transporter 1/peptide transporter (NRT1/PTR) family have been identified. In this review, we summarize recent research progress on the role of ABA in fruit ripening, stress response, and transcriptional regulation, and also the functional verification of both ABA-responsive and ripening-related genes. In addition, we suggest possible commercial applications of genetic manipulation of ABA signalling to improve fruit quality and yields.
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Affiliation(s)
- Ping Leng
- College of Agronomy and Biotechnology, China Agricultural University, PR China
| | - Bing Yuan
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University BouleVard, Tucson, AZ, USA
| | - Yangdong Guo
- College of Agronomy and Biotechnology, China Agricultural University, PR China
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Dyson BC, Webster RE, Johnson GN. GPT2: a glucose 6-phosphate/phosphate translocator with a novel role in the regulation of sugar signalling during seedling development. ANNALS OF BOTANY 2014; 113:643-52. [PMID: 24489010 PMCID: PMC3936590 DOI: 10.1093/aob/mct298] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
BACKGROUND AND AIMS GPT2, a glucose 6-phosphate/phosphate translocator, plays an important role in environmental sensing in mature leaves of Arabidopsis thaliana. Its expression has also been detected in arabidopsis seeds and seedlings. In order to examine the role of this protein early in development, germination and seedling growth were studied. METHODS Germination, greening and establishment of seedlings were monitored in both wild-type Arabidopsis thaliana and in a gpt2 T-DNA insertion knockout line. Seeds were sown on agar plates in the presence or absence of glucose and abscisic acid. Relative expression of GPT2 in seedlings was measured using quantitative PCR. KEY RESULTS Plants lacking GPT2 expression were delayed (25-40 %) in seedling establishment, specifically in the process of cotyledon greening (rather than germination). This phenotype could not be rescued by glucose in the growth medium, with greening being hypersensitive to glucose. Germination itself was, however, hyposensitive to glucose in the gpt2 mutant. CONCLUSIONS The expression of GPT2 modulates seedling development and plays a crucial role in determining the response of seedlings to exogenous sugars during their establishment. This allows us to conclude that endogenous sugar signals function in controlling germination and the transition from heterotrophic to autotrophic growth, and that the partitioning of glucose 6-phosphate, or related metabolites, between the cytosol and the plastid modulates these developmental responses.
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Affiliation(s)
- Beth C. Dyson
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK
| | - Rachel E. Webster
- The Manchester Museum, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Giles N. Johnson
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK
- For correspondence. E-mail
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23
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Kelly G, Moshelion M, David-Schwartz R, Halperin O, Wallach R, Attia Z, Belausov E, Granot D. Hexokinase mediates stomatal closure. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2013; 75:977-88. [PMID: 23738737 DOI: 10.1111/tpj.12258] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 05/30/2013] [Accepted: 06/03/2013] [Indexed: 05/19/2023]
Abstract
Stomata, composed of two guard cells, are the gates whose controlled movement allows the plant to balance the demand for CO2 for photosynthesis with the loss of water through transpiration. Increased guard-cell osmolarity leads to the opening of the stomata and decreased osmolarity causes the stomata to close. The role of sugars in the regulation of stomata is not yet clear. In this study, we examined the role of hexokinase (HXK), a sugar-phosphorylating enzyme involved in sugar-sensing, in guard cells and its effect on stomatal aperture. We show here that increased expression of HXK in guard cells accelerates stomatal closure. We further show that this closure is induced by sugar and is mediated by abscisic acid. These findings support the existence of a feedback-inhibition mechanism that is mediated by a product of photosynthesis, namely sucrose. When the rate of sucrose production exceeds the rate at which sucrose is loaded into the phloem, the surplus sucrose is carried toward the stomata by the transpiration stream and stimulates stomatal closure via HXK, thereby preventing the loss of precious water.
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Affiliation(s)
- Gilor Kelly
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, 50250, Israel
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Li XY, Liu X, Yao Y, Li YH, Liu S, He CY, Li JM, Lin YY, Li L. Overexpression of Arachis hypogaea AREB1 gene enhances drought tolerance by modulating ROS scavenging and maintaining endogenous ABA content. Int J Mol Sci 2013; 14:12827-42. [PMID: 23783278 PMCID: PMC3709814 DOI: 10.3390/ijms140612827] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 05/21/2013] [Accepted: 05/31/2013] [Indexed: 01/23/2023] Open
Abstract
AhAREB1 (Arachis hypogaea Abscisic-acid Response Element Binding Protein 1) is a member of the basic domain leucine zipper (bZIP)-type transcription factor in peanut. Previously, we found that expression of AhAREB1 was specifically induced by abscisic acid (ABA), dehydration and drought. To understand the drought defense mechanism regulated by AhAREB1, transgenic Arabidopsis overexpressing AhAREB1 was conducted in wild-type (WT), and a complementation experiment was employed to ABA non-sensitivity mutant abi5 (abscisic acid-insensitive 5). Constitutive expression of AhAREB1 confers water stress tolerance and is highly sensitive to exogenous ABA. Microarray and further real-time PCR analysis revealed that drought stress, reactive oxygen species (ROS) scavenging, ABA synthesis/metabolism-related genes and others were regulated in transgenic Arabidopsis overexpressing AhAREB1. Accordingly, low level of ROS, but higher ABA content was detected in the transgenic Arabidopsis plants’ overexpression of AhAREB1. Taken together, it was concluded that AhAREB1 modulates ROS accumulation and endogenous ABA level to improve drought tolerance in transgenic Arabidopsis.
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Affiliation(s)
- Xiao-Yun Li
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Xu Liu
- Molecular Analysis and Genetic Improvement Center, South China Botanical Garden, Chinese Academy of Science, Guangzhou 510650, China
| | - Yao Yao
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Yi-Hao Li
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Shuai Liu
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Chao-Yong He
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Jian-Mei Li
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Ying-Ying Lin
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
| | - Ling Li
- Guangdong Provincial Key Lab of Biotechnology for Plant Development, College of Life Science, South China Normal University, Guangzhou 510631, China; E-Mails: (X.-Y.L.); (X.L.); (Y.Y.); (Y.-H.L.); (S.L.); (C.-Y.H.); (J.-M.L.); (Y.-Y.L.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-020-8521-1378; Fax: +86-020-8521-5535
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Abstract
Abscisic acid (ABA) is one of the "classical" plant hormones, i.e. discovered at least 50 years ago, that regulates many aspects of plant growth and development. This chapter reviews our current understanding of ABA synthesis, metabolism, transport, and signal transduction, emphasizing knowledge gained from studies of Arabidopsis. A combination of genetic, molecular and biochemical studies has identified nearly all of the enzymes involved in ABA metabolism, almost 200 loci regulating ABA response, and thousands of genes regulated by ABA in various contexts. Some of these regulators are implicated in cross-talk with other developmental, environmental or hormonal signals. Specific details of the ABA signaling mechanisms vary among tissues or developmental stages; these are discussed in the context of ABA effects on seed maturation, germination, seedling growth, vegetative stress responses, stomatal regulation, pathogen response, flowering, and senescence.
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Affiliation(s)
- Ruth Finkelstein
- Department of Molecular, Cellular and Developmental Biology, University of California at Santa Barbara, Santa Barbara, CA 93106 Address
- correspondence to e-mail:
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26
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Song S, Dai X, Zhang WH. A rice F-box gene, OsFbx352, is involved in glucose-delayed seed germination in rice. JOURNAL OF EXPERIMENTAL BOTANY 2012; 63:5559-68. [PMID: 22859682 PMCID: PMC3444269 DOI: 10.1093/jxb/ers206] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
F-box proteins play diverse roles in regulating numerous physiological processes in plants. This study isolated a gene (OsFbx352) from rice encoding an F-box domain protein and characterized its role in seed germination. Expression of OsFbx352 was upregulated by abscisic acid (ABA). The transcripts of OsFbx352 were increased upon imbibition of rice seeds and the increase was markedly suppressed by glucose. Germination of seeds with overexpression of OsFbx352 was less suppressed by glucose than that of wild-type seeds, while glucose had greater inhibition for germination of seeds with knockdown of OsFbx352 by RNA interference (RNAi) than that of wild-type seeds. The differential response of germination of the transgenic and wild-type seeds to glucose may be accounted for by differences in ABA content among overexpressing, RNAi, and wild-type seeds such that overexpression of OsFbx352 and knockdown of OsFbx352 led to lower and higher ABA contents, respectively, than that of wild-type seeds in the presence of glucose. Overexpression of OsFbx352 led to a reduction in expression of genes responsible for ABA synthesis (OsNced2, OsNced3) and an increase in expression of genes encoding ABA catabolism (OsAba-ox2, OsAba-ox3) in the presence of glucose. These findings indicate that OsFbx352 plays a regulatory role in the regulation of glucose-induced suppression of seed germination by targeting ABA metabolism.
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Affiliation(s)
- Shiyong Song
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences,Beijing 100093PR China
- Graduate University of the Chinese Academy of Sciences, Beijing 100049PR China
| | - Xiaoyan Dai
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences,Beijing 100093PR China
| | - Wen-Hao Zhang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences,Beijing 100093PR China
- To whom correspondence should be addressed. E-mail:
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