151
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Transcriptomic profile analysis of the halophyte Suaeda rigida response and tolerance under NaCl stress. Sci Rep 2020; 10:15148. [PMID: 32939003 PMCID: PMC7494938 DOI: 10.1038/s41598-020-71529-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 08/17/2020] [Indexed: 11/17/2022] Open
Abstract
Suaeda rigida is a lignified, true haplotype that predominantly grows in the Tarim basin, China. It has significant economic and ecological value. Herein, with aim to determine the genes associated with salt tolerance, transcriptome sequencing was performed on its stem, leaves and root over three set NaCl gradients regimens at treatment intervals of 3 h and 5 days. From our findings, we identified 829,095 unigenes, with 331,394 being successfully matched to at least one annotation database. In roots, under 3 h treatment, no up-regulated DEGs were identified in 100 and 500 mM NaCl treated samples. Under 5 days treatment, 97, 60 and 242 up-regulated DEGs were identified in 100, 300, 500 mM NaCl treated samples, respectively. We identified 50, 22 and 255 down-regulated DEGs in 100, 300, 500 mM NaCl treated samples, respectively. GO biological process enrichment analysis established that down-regulated DEGs were associated with nitrogen compound transport, organic substance transport and intracellular protein transport while the up-regulated genes were enriched in cell wall biogenesis, such as plant-type cell wall biogenesis, cell wall assembly, extracellular matrix organization and plant-type cell wall organization. These findings provide valuable knowledge on genes associated with salt tolerance of Suaeda rigida, and can be applied in other downstream haplotype studies.
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152
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Transcriptome Sequencing Analysis of Birch (Betula platyphylla Sukaczev) under Low-Temperature Stress. FORESTS 2020. [DOI: 10.3390/f11090970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Low temperature is one of the common abiotic stresses that adversely affect the growth and development of plants. In this study, we used RNA-Seq to identify low-temperature-responsive genes in birch and further analyzed the underlying molecular mechanism. Birch seedlings were treated by the low temperature (6 °C) for 0, 1, 1.5, 2, 2.5, and 3 h, respectively. A total of 3491 genes were differentially expressed after low-temperature stress. Gene Ontology (GO) and Kyoto Encyclopedia of Gene and Genomes (KEGG) functional enrichment analysis were performed for the differentially expressed genes (DEGs). GO analysis indicated that 3491 DEGs were distributed into 1002 categories, and these DEGs were enriched in “cell process”, “metabolic process”, and “stimulus response”, under the “biological process” category; in “organelles” and “cell components”, under the “cell component” category; and in “catalytic activity” and “adhesion”, under the “molecular function” category. The KEGG enrichment indicated that 119 DEGs were involved in Ca2+ and plant hormone signal transduction; 205 DEGs were involved in secondary metabolic processes, such as lipid metabolism and phenylpropanoid biosynthesis pathway; and 20 DEGs were involved in photosynthesis. In addition, a total of 362 transcription factors (TFs) were differentially expressed under low-temperature stress, including AP2/ERF, C2H2, MYB-HB-like, WRKY, bHLH, WD40-like, and GRAS families. Gene Bpev01.c0480.g0081 (calmodulin-like CML38), Bpev01.c1074.g0005 (calmodulin-like CML25), Bpev01.c1074.g0001 (Calcium-binding EF-hand family protein), Bpev01.c2029.g0005 (calmodulin-like protein), Bpev01.c0154.g0008 (POD), Bpev01.c0015.g0143 (N-acetyl-1-glutamate synthase), and Bpev01.c0148.g0010 (branched chain amino acid transferase) were up-regulated at a high level, under low-temperature stress.
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153
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Diao P, Chen C, Zhang Y, Meng Q, Lv W, Ma N. The role of NAC transcription factor in plant cold response. PLANT SIGNALING & BEHAVIOR 2020; 15:1785668. [PMID: 32662739 PMCID: PMC8550289 DOI: 10.1080/15592324.2020.1785668] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The NAC transcription factor (TF) is one of the largest families of TFs in plants and plays an important role in plant growth, development, and response to environmental stress. The structural and functional characteristics of NAC TFs have been uncovered in the past years, including sequence binding features of the DNA-binding domain located in the N-terminus and dynamic interplay between the domain located at the C-terminus and other proteins. Studies on NAC TF are increasing in number; these studies distinctly contribute to our understanding of the regulatory networks of NAC-mediated complex signaling and transcriptional reprogramming. Previous studies have indicated that NAC TFs are key regulators of the plant stress response. However, these studies have been for six years so far and mainly focused on drought and salt stress. There are relatively few reports about NAC TFs in plant cold signal pathway and no related reviews have been published. In this review article, we summarize the structural features of NAC TFs, the target genes, upstream regulators and interaction proteins of stress-responsive NAC TFs, and the roles NAC TFs play in plant cold stress signal pathway.
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Affiliation(s)
- Pengfei Diao
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Tai’an, Shandong, China
| | - Chong Chen
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Tai’an, Shandong, China
- Nana Ma State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Daizong Street, Tai’an, Shandong, 271018, China
| | - Yuzhen Zhang
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Tai’an, Shandong, China
| | - Qingwei Meng
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Tai’an, Shandong, China
| | - Wei Lv
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Tai’an, Shandong, China
- CONTACT Wei Lv
| | - Nana Ma
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Tai’an, Shandong, China
- Nana Ma State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Daizong Street, Tai’an, Shandong, 271018, China
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154
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Ahmed RF, Irfan M, Shakir HA, Khan M, Chen L. Engineering drought tolerance in plants by modification of transcription and signalling factors. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1805359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Rida Fatima Ahmed
- Department of Biotechnology, Faculty of Science, University of Sargodha, Sargodha, Pakistan
| | - Muhammad Irfan
- Department of Biotechnology, Faculty of Science, University of Sargodha, Sargodha, Pakistan
| | - Hafiz Abdullah Shakir
- Department of Zoology, Faculty of life Science, University of the Punjab New Campus, Lahore, Pakistan
| | - Muhammad Khan
- Department of Zoology, Faculty of life Science, University of the Punjab New Campus, Lahore, Pakistan
| | - Lijing Chen
- Department of Biotechnology, College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, PR China
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155
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Zhang CY, Liu HC, Zhang XS, Guo QX, Bian SM, Wang JY, Zhai LL. VcMYB4a, an R2R3-MYB transcription factor from Vaccinium corymbosum, negatively regulates salt, drought, and temperature stress. Gene 2020; 757:144935. [PMID: 32653482 DOI: 10.1016/j.gene.2020.144935] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 06/22/2020] [Accepted: 07/01/2020] [Indexed: 11/26/2022]
Abstract
MYB transcription factors (TFs) play important roles in the plant's response to abiotic stress. In this study, we cloned a novel MYB TF gene from Vaccinium corymbosum (blueberry) using rapid amplification of cDNA ends (RACE). The cDNA contained a 798-bp open reading frame that encodes a 265-amino acid protein. VcMYB4a possessed a C2/EAR-repressor motif domain and phylogenetic analysis showed that it clustered into a subgroup 4 with six Arabidopsis thaliana MYBs. Quantitative RT-PCR analysis demonstrated that VcMYB4a expression was downregulated by salt, drought, and cold treatment, but was induced by freezing and heat. Overexpression of VcMYB4a in blueberry callus enhanced sensitivity to salt, drought, cold, freezing, and heat stress. These results indicate that VcMYB4a may be an important repressor of abiotic stress in blueberry.
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Affiliation(s)
- Chun-Yu Zhang
- College of Plant Science, Jilin University, Changchun 130062, China.
| | - Hong-Chao Liu
- Songliao Water Resources Protection Scientific Research Institute, Changchun 130021, China
| | - Xin-Sheng Zhang
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Qing-Xun Guo
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Shao-Min Bian
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Jing-Ying Wang
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Lu-Lu Zhai
- College of Plant Science, Jilin University, Changchun 130062, China
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156
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Lidón-Soto A, Núñez-Delegido E, Pastor-Martínez I, Robles P, Quesada V. Arabidopsis Plastid-RNA Polymerase RPOTp Is Involved in Abiotic Stress Tolerance. PLANTS (BASEL, SWITZERLAND) 2020; 9:E834. [PMID: 32630785 PMCID: PMC7412009 DOI: 10.3390/plants9070834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 06/25/2020] [Accepted: 06/29/2020] [Indexed: 05/05/2023]
Abstract
Plastid gene expression (PGE) must adequately respond to changes in both development and environmental cues. The transcriptional machinery of plastids in land plants is far more complex than that of prokaryotes. Two types of DNA-dependent RNA polymerases transcribe the plastid genome: a multimeric plastid-encoded polymerase (PEP), and a monomeric nuclear-encoded polymerase (NEP). A single NEP in monocots (RPOTp, RNA polymerase of the T3/T7 phage-type) and two NEPs in dicots (plastid-targeted RPOTp, and plastid- and mitochondrial-targeted RPOTmp) have been hitherto identified. To unravel the role of PGE in plant responses to abiotic stress, we investigated if Arabidopsis RPOTp could function in plant salt tolerance. To this end, we studied the sensitivity of T-DNA mutants scabra3-2 (sca3-2) and sca3-3, defective in the RPOTp gene, to salinity, osmotic stress and the phytohormone abscisic acid (ABA) required for plants to adapt to abiotic stress. sca3 mutants were hypersensitive to NaCl, mannitol and ABA during germination and seedling establishment. Later in development, sca3 plants displayed reduced sensitivity to salt stress. A gene ontology (GO) analysis of the nuclear genes differentially expressed in the sca3-2 mutant (301) revealed that many significantly enriched GO terms were related to chloroplast function, and also to the response to several abiotic stresses. By quantitative RT-PCR (qRT-PCR), we found that genes LHCB1 (LIGHT-HARVESTING CHLOROPHYLL a/b-BINDING1) and AOX1A (ALTERNATIVE OXIDASE 1A) were respectively down- and up-regulated in the Columbia-0 (Col-0) salt-stressed plants, which suggests the activation of plastid and mitochondria-to-nucleus retrograde signaling. The transcript levels of genes RPOTp, RPOTmp and RPOTm significantly increased in these salt-stressed seedlings, but this enhanced expression did not lead to the up-regulation of the plastid genes solely transcribed by NEP. Similar to salinity, carotenoid inhibitor norflurazon (NF) also enhanced the RPOTp transcript levels in Col-0 seedlings. This shows that besides salinity, inhibition of chloroplast biogenesis also induces RPOTp expression. Unlike salt and NF, the NEP genes were significantly down-regulated in the Col-0 seedlings grown in ABA-supplemented media. Together, our findings demonstrate that RPOTp functions in abiotic stress tolerance, and RPOTp is likely regulated positively by plastid-to-nucleus retrograde signaling, which is triggered when chloroplast functionality is perturbed by environmental stresses, e.g., salinity or NF. This suggests the existence of a compensatory mechanism, elicited by impaired chloroplast function. To our knowledge, this is the first study to suggest the role of a nuclear-encoded plastid-RNA polymerase in salt stress tolerance in plants.
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Affiliation(s)
| | | | | | | | - Víctor Quesada
- Instituto de Bioingeniería, Universidad Miguel Hernández, Campus de Elche, 03202 Elche, Spain; (A.L.-S.); (E.N.-D.); (I.P.-M.); (P.R.)
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157
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Seven M, Akdemir H. DOF, MYB and TCP transcription factors: Their possible roles on barley germination and seedling establishment. Gene Expr Patterns 2020; 37:119116. [PMID: 32603687 DOI: 10.1016/j.gep.2020.119116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/03/2020] [Indexed: 12/28/2022]
Abstract
Seed germination is a multi-staged complex process during seed plant life cycle, and it is tightly regulated through a coordinated expression of diverse genes in diverse tissues. As regulatory molecules of gene expression, determination of transcription factors is crucial to understanding molecular basis and regulatory network of germination process and seedling establishment. However, limited data on the contributions of these transcription factors to the germination of crop barley (Hordeum vulgare L.) are available. Here, we investigated the expression profiles of selected transcription factors from different families (DOF, MYB and TCP) with qRT-PCR analysis in various tissues including coleoptiles, leaves and roots following the germination. Analysis of MYB and DOF gene expression profiles indicated that there were differing expressions in different aged tissues, HvMYB5 and HvDOF2 being the most outstanding one in the oldest tissue, 15-day-old root. On the other hand, investigated TCP genes were lowly expressed compared to selected MYB and DOF genes, except HvTCP3, where the highest expression was observed in 15-day-old root tissue. The obtained expression profiles illustrate the importance of potential regulatory roles of transcription factors in early developmental stages of barley germination and seedling establishment.
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Affiliation(s)
- Merve Seven
- Yeditepe University, Department of Genetics and Bioengineering, 34755, Istanbul, Turkey
| | - Hulya Akdemir
- Gebze Technical University, Faculty of Science, Department of Molecular Biology and Genetics, 41400, Kocaeli, Turkey.
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158
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Jeyaraj A, Elango T, Li X, Guo G. Utilization of microRNAs and their regulatory functions for improving biotic stress tolerance in tea plant [ Camellia sinensis (L.) O. Kuntze]. RNA Biol 2020; 17:1365-1382. [PMID: 32478595 DOI: 10.1080/15476286.2020.1774987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs play a central role in responses to biotic stressors through their interactions with their target mRNAs. Tea plant (Camellia sinensis L.), an important beverage crop, is vulnerable to tea geometrid and anthracnose disease that causes considerable crop loss and tea production worldwide. Sustainable production of tea in the current scenario to biotic factors is major challenges. To overcome the problem of biotic stresses, high-throughput sequencing (HTS) with bioinformatics analyses has been used as an effective approach for the identification of stress-responsive miRNAs and their regulatory functions in tea plant. These stress-responsive miRNAs can be utilized for miRNA-mediated gene silencing to enhance stress tolerance in tea plant. Therefore, this review summarizes the current understanding of miRNAs regulatory functions in tea plant responding to Ectropis oblique and Colletotrichum gloeosporioides attacks for future miRNA research. Also, it highlights the utilization of miRNA-mediated gene silencing strategies for developing biotic stress-tolerant tea plant.
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Affiliation(s)
- Anburaj Jeyaraj
- Tea Research Institute, Nanjing Agricultural University , Nanjing, China.,Department of Biotechnology, Karpagam Academy of Higher Education , Tamilnadu, India
| | - Tamilselvi Elango
- Tea Research Institute, Nanjing Agricultural University , Nanjing, China
| | - Xinghui Li
- Tea Research Institute, Nanjing Agricultural University , Nanjing, China
| | - Guiyi Guo
- Henan Key Laboratory of Tea Plant Comprehensive Utilization in South Henan, Xinyang Agriculture and Forestry University , Xinyang, P.R. China
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159
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Zhang L, Xie J, Wang L, Si L, Zheng S, Yang Y, Yang H, Tian S. Wheat TabZIP8, 9, 13 participate in ABA biosynthesis in NaCl-stressed roots regulated by TaCDPK9-1. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:650-658. [PMID: 32339912 DOI: 10.1016/j.plaphy.2020.03.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 05/02/2023]
Abstract
In plants, basic leucine zipper (bZIP) transcription factors (TFs) participate in various biological processes such as development and stress responses. But the molecular mechanism of wheat bZIP TFs modulating abscisic acid (ABA) biosynthesis is unknown. In this study, we demonstrated the expressions of three bZIP TF genes TabZIP8, 9, 13, were regulated by Triticum aestivum calcium (Ca2+)-dependent protein kinase 9-1 (TaCDPK9-1) and they took part in ABA biosynthesis in wheat roots under salt stress. We first isolated TabZIP8, 9, 13 and TaCDPK9-1 from wheat. TabZIP8, 9, 13 genes transcripts were strongly induced by salt stress, but salt-induced TabZIP8, 9, 13 transcriptions were drastically impaired by Ca2+ channel blocker LaCl3. TaCDPK9-1 kinase could interact with TabZIP8, 9, 13 TFs through yeast two-hybrid assay. Next, the expression levels of salt-induced wheat 9-cis-epoxycarotenoid dioxygenase1, 2 (TaNCED1,2) encoding a key enzyme controlling ABA production and salt-induced ABA content were found to be decreased under LaCl3 treatment, and yeast one-hybrid experiment revealed TabZIP8, 9, 13 could bind to the ABA-responsive elements (ABREs) and the promoter sequence of TaNCED2 gene. Together, our results suggest that salt stress-induced ABA accumulation is mediated by TabZIP8, 9, 13, which are adjusted by TaCDPK9-1 in wheat roots.
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Affiliation(s)
- Lina Zhang
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China.
| | - Jiaqi Xie
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
| | - Liting Wang
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
| | - Lianbang Si
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
| | - Shen Zheng
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
| | - Yingli Yang
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
| | - Hong Yang
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
| | - Shengguo Tian
- School of Life Science, Northwest Normal University, Lanzhou, 730070, China
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160
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Zhang L, Guo X, Qin Y, Feng B, Wu Y, He Y, Wang A, Zhu J. The chilling tolerance divergence 1 protein confers cold stress tolerance in processing tomato. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:34-46. [PMID: 32193092 DOI: 10.1016/j.plaphy.2020.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 06/10/2023]
Abstract
Tomato (Lycopersicon esculentum Mill [Solanum lycopersicum L.].) is an important food material and cash crop, as well as a model plant for genetic evolution and molecular biology research. However, as a cold-sensitive crop originating from the tropics, the growth and development of tomato is often affected by low temperature stress. Therefore, how processing tomatoes resist this type of stress has important theoretical and practical significance. In this study, the LeCOLD1 gene was cloned from processing tomato. Subcellular localization analysis showed that LeCOLD1 was located in the plasma membrane. Real-time quantitative PCR analysis showed that LeCOLD1 was highly expressed in roots. Drought, salt and low temperatures induced the expression of COLD1. Overexpression and RNA interference vectors of LeCOLD1 were constructed and were transformed into tomato by the Agrobacterium-mediated method, and then obtaining transgenic tomato plants. It was found that LeCOLD1 increased the height of processing tomato plants and increased the length of their roots. In addition, overexpression of LeCOLD1 significantly improved the cold resistance of the plants. Overexpressing LeCOLD1 in tomato plants reduced the damage to the cell membrane, accumulation of ROS and photoinhibition of PSII, and maintained the high activity of antioxidant enzymes and the content of osmotic regulators. Further analysis revealed that during low temperature stress, the cells maintained high levels of antioxidant enzyme activity by regulating the transcription of the genes encoding these enzymes. The results show that overexpressing LeCOLD1 in tomato increases the plants' resistance to low temperatures, and that reducing LeCOLD1 expression makes the plants more sensitive to low temperatures.
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Affiliation(s)
- Li Zhang
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Xinyong Guo
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Yujie Qin
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Bin Feng
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Yating Wu
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Yaling He
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Aiying Wang
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China
| | - Jianbo Zhu
- Key Laboratory of Agricultural Biotechnology, College of Life Science, Shihezi University, Shihezi, 832000, China.
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161
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Vincent C, Rowland D, Schaffer B, Bassil E, Racette K, Zurweller B. Primed acclimation: A physiological process offers a strategy for more resilient and irrigation-efficient crop production. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 295:110240. [PMID: 32534621 DOI: 10.1016/j.plantsci.2019.110240] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 08/22/2019] [Accepted: 08/24/2019] [Indexed: 06/11/2023]
Abstract
Optimizing plant physiological function is essential to maintaining crop yields under water scarcity and in developing more water-efficient production practices. However, the most common strategies in addressing water conservation in agricultural production have focused on water-efficient technologies aimed at managing water application or on improving crop water-use efficiency through breeding. Few management strategies explicitly consider the management or manipulation of plant physiological processes, but one which does is termed primed acclimation (PA). The PA strategy uses the physiological processes involved in priming to pre-acclimate plants to water deficits while reducing irrigation. It has been shown to evoke multi-mechanistic responses across numerous crop species. A combination of existing literature and emerging studies find that mechanisms for pre-acclimating plants to water deficit stress include changes in root:shoot partitioning, root architecture, water use, photosynthetic characteristics, osmotic adjustment and anti-oxidant production. In many cases, PA reduces agricultural water use by improving plant access to existing soil water. Implementing PA in seasonally water-limited environments can mitigate yield losses to drought. Genotypic variation in PA responses offers the potential to screen for crop varieties with the greatest potential for beneficial priming responses and to identify specific priming and acclimation mechanisms. In this review we: 1) summarize the concept of priming within the context of plant stress physiology; 2) review the development of a PA management system that utilizes priming for water conservation in agroecosystems; and 3) address the future of PA, how it should be evaluated across crop species, and its utility in managing crop stress tolerance.
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Affiliation(s)
- Christopher Vincent
- Horticultural Sciences Department, Citrus Research and Education Center, University of Florida, 700 Old Lee Jackson Road, Lake Alfred, FL, USA.
| | - Diane Rowland
- Agronomy Department, University of Florida, P.O. Box 110500, Gainesville, FL, 32611, USA.
| | - Bruce Schaffer
- Horticultural Sciences Department, Tropical Research and Education Center, University of Florida, 18905 S.W. 280 Street, Homestead, FL, 33031, USA
| | - Elias Bassil
- Horticultural Sciences Department, Tropical Research and Education Center, University of Florida, 18905 S.W. 280 Street, Homestead, FL, 33031, USA.
| | - Kelly Racette
- Agronomy Department, University of Florida, P.O. Box 110500, Gainesville, FL, 32611, USA
| | - Brendan Zurweller
- Department of Plant and Soil Sciences, Mississippi State University, P.O. Box 9555, Mississippi State, MS, 39762, USA.
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162
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Bukhat S, Imran A, Javaid S, Shahid M, Majeed A, Naqqash T. Communication of plants with microbial world: Exploring the regulatory networks for PGPR mediated defense signaling. Microbiol Res 2020; 238:126486. [PMID: 32464574 DOI: 10.1016/j.micres.2020.126486] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/20/2020] [Accepted: 03/28/2020] [Indexed: 02/01/2023]
Abstract
Agricultural manipulation of potentially beneficial rhizosphere microbes is increasing rapidly due to their multi-functional plant-protective and growth related benefits. Plant growth promoting rhizobacteria (PGPR) are mostly non-pathogenic microbes which exert direct benefits on plants while there are rhizosphere bacteria which indirectly help plant by ameliorating the biotic and/or abiotic stress or induction of defense response in plant. Regulation of these direct or indirect effect takes place via highly specialized communication system induced at multiple levels of interaction i.e., inter-species, intra-species, and inter-kingdom. Studies have provided insights into the functioning of signaling molecules involved in communication and induction of defense responses. Activation of host immune responses upon bacterial infection or rhizobacteria perception requires comprehensive and precise gene expression reprogramming and communication between hosts and microbes. Majority of studies have focused on signaling of host pattern recognition receptors (PRR) and nod-like receptor (NLR) and microbial effector proteins under mining the role of other components such as mitogen activated protein kinase (MAPK), microRNA, histone deacytylases. The later ones are important regulators of gene expression reprogramming in plant immune responses, pathogen virulence and communications in plant-microbe interactions. During the past decade, inoculation of PGPR has emerged as potential strategy to induce biotic and abiotic stress tolerance in plants; hence, it is imperative to expose the basis of these interactions. This review discusses microbes and plants derived signaling molecules for their communication, regulatory and signaling networks of PGPR and their different products that are involved in inducing resistance and tolerance in plants against environmental stresses and the effect of defense signaling on root microbiome. We expect that it will lead to the development and exploitation of beneficial microbes as source of crop biofertilizers in climate changing scenario enabling more sustainable agriculture.
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Affiliation(s)
- Sherien Bukhat
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, 60800 Multan, Pakistan.
| | - Asma Imran
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577, Jhang Road, Faisalabad, Pakistan.
| | - Shaista Javaid
- Institute of Molecular Biology and Biotechnology, University of Lahore Main Campus, Defense road, Lahore, Pakistan.
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad 38000, Pakistan.
| | - Afshan Majeed
- Department of Soil and Environmental Sciences, The University of Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan.
| | - Tahir Naqqash
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, 60800 Multan, Pakistan.
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163
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Li Q, Qin Y, Hu X, Li G, Ding H, Xiong X, Wang W. Transcriptome analysis uncovers the gene expression profile of salt-stressed potato (Solanum tuberosum L.). Sci Rep 2020; 10:5411. [PMID: 32214109 PMCID: PMC7096413 DOI: 10.1038/s41598-020-62057-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/05/2020] [Indexed: 12/14/2022] Open
Abstract
Potato (Solanum tuberosum L.) is an important staple food worldwide. However, its growth has been heavily suppressed by salt stress. The molecular mechanisms of salt tolerance in potato remain unclear. It has been shown that the tetraploid potato Longshu No. 5 is a salt-tolerant genotype. Therefore, in this study we conducted research to identify salt stress response genes in Longshu No. 5 using a NaCl treatment and time-course RNA sequencing. The total number of differentially expressed genes (DEGs) in response to salt stress was 5508. Based on Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis, it was found that DEGs were significantly enriched in the categories of nucleic acid binding, transporter activity, ion or molecule transport, ion binding, kinase activity and oxidative phosphorylation. Particularly, the significant differential expression of encoding ion transport signaling genes suggests that this signaling pathway plays a vital role in salt stress response in potato. Finally, the DEGs in the salt response pathway were verified by Quantitative real-time PCR (qRT-PCR). These results provide valuable information on the salt tolerance of molecular mechanisms in potatoes, and establish a basis for breeding salt-tolerant cultivars.
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Affiliation(s)
- Qing Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Root and Tuber Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
- College of Horticulture, Hunan Agricultural University/Hunan Provincial Engineering Research Center for Potatoes/Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China
| | - Yuzhi Qin
- College of Horticulture, Hunan Agricultural University/Hunan Provincial Engineering Research Center for Potatoes/Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China
| | - Xinxi Hu
- College of Horticulture, Hunan Agricultural University/Hunan Provincial Engineering Research Center for Potatoes/Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China
| | - Guangcun Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Root and Tuber Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Hongying Ding
- College of Horticulture, Hunan Agricultural University/Hunan Provincial Engineering Research Center for Potatoes/Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China
| | - Xingyao Xiong
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Root and Tuber Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
- College of Horticulture, Hunan Agricultural University/Hunan Provincial Engineering Research Center for Potatoes/Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, China.
| | - Wanxing Wang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Root and Tuber Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
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Norlina R, Norashikin MN, Loh SH, Aziz A, Cha TS. Exogenous Abscisic Acid Supplementation at Early Stationary Growth Phase Triggers Changes in the Regulation of Fatty Acid Biosynthesis in Chlorella vulgaris UMT-M1. Appl Biochem Biotechnol 2020; 191:1653-1669. [PMID: 32198601 DOI: 10.1007/s12010-020-03312-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 03/12/2020] [Indexed: 11/30/2022]
Abstract
Abscisic acid (ABA) has been known to exist in a microalgal system and serves as one of the chemical stimuli in various biological pathways. Nonetheless, the involvement of ABA in fatty acid biosynthesis, particularly at the transcription level in microalgae is poorly understood. The objective of this study was to determine the effects of exogenous ABA on growth, total oil content, fatty acid composition, and the expression level of beta ketoacyl-ACP synthase I (KAS I) and omega-3 fatty acid desaturase (ω-3 FAD) genes in Chlorella vulgaris UMT-M1. ABA was applied to early stationary C. vulgaris cultures at concentrations of 0, 10, 20, and 80 μM for 48 h. The results showed that ABA significantly increased biomass production and total oil content. The increment of palmitic (C16:0) and stearic (C18:0) acids was coupled by decrement in linoleic (C18:2) and α-linolenic (C18:3n3) acids. Both KAS I and ω-3 FAD gene expression were downregulated, which was negatively correlated to saturated fatty acid (SFAs), but positively correlated to polyunsaturated fatty acid (PUFA) accumulations. Further analysis of both KAS I and ω-3 FAD promoters revealed the presence of multiple ABA-responsive elements (ABREs) in addition to other phytohormone-responsive elements. However, the role of these phytohormone-responsive elements in regulating KAS I and ω-3 FAD gene expression still remains elusive. This revelation might suggest that phytohormone-responsive gene regulation in C. vulgaris and microalgae as a whole might diverge from higher plants which deserve further scientific research to elucidate its functional roles.
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Affiliation(s)
- Ramlee Norlina
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
| | - Md Nor Norashikin
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
| | - Saw Hong Loh
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
| | - Ahmad Aziz
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
| | - Thye San Cha
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia.
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Ma XJ, Yu TF, Li XH, Cao XY, Ma J, Chen J, Zhou YB, Chen M, Ma YZ, Zhang JH, Xu ZS. Overexpression of GmNFYA5 confers drought tolerance to transgenic Arabidopsis and soybean plants. BMC PLANT BIOLOGY 2020; 20:123. [PMID: 32192425 PMCID: PMC7082914 DOI: 10.1186/s12870-020-02337-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/10/2020] [Indexed: 05/27/2023]
Abstract
BACKGROUND Crop productivity is challenged by abiotic stresses, among which drought stress is the most common. NF-Y genes, especially NF-YA genes, regulate tolerance to abiotic stress. RESULTS Soybean NF-Y gene GmNFYA5 was identified to have the highest transcript level among all 21 NF-YA genes in soybean (Glycine max L.) under drought stress. Drought-induced transcript of GmNFYA5 was suppressed by the ABA synthesis inhibitor naproxen (NAP). GmNFYA5 transcript was detected in various tissues at vegetative and reproductive growth stages with higher levels in roots and leaves than in other tissues, which was consist with the GmNFYA5 promoter: GUS fusion assay. Overexpression of GmNFYA5 in transgenic Arabidopsis plants caused enhanced drought tolerance in seedlings by decreasing stomatal aperture and water loss from leaves. Overexpression and suppression of GmNFYA5 in soybean resulted in increased and decreased drought tolerance, respectively, relative to plants with an empty vector (EV). Transcript levels of ABA-dependent genes (ABI2, ABI3, NCED3, LEA3, RD29A, P5CS1, GmWRKY46, GmNCED2 and GmbZIP1) and ABA-independent genes (DREB1A, DREB2A, DREB2B, GmDREB1, GmDREB2 and GmDREB3) in transgenic plants overexpressing GmNFYA5 were higher than those of wild-type plants under drought stress; suppression of GmNFYA5 transcript produced opposite results. GmNFYA5 probably regulated the transcript abundance of GmDREB2 and GmbZIP1 by binding to the promoters in vivo. CONCLUSIONS Our results suggested that overexpression of GmNFYA5 improved drought tolerance in soybean via both ABA-dependent and ABA-independent pathways.
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Affiliation(s)
- Xiao-Jun Ma
- College of Agronomy, Northeast Agricultural University, Harbin, 150030 China
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
| | - Tai-Fei Yu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
| | - Xiao-Hui Li
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, 136100 China
| | - Xin-You Cao
- Crop Research Institute, Shandong Academy of Agricultural Sciences, National Engineering Laboratory for Wheat and Maize, Key Laboratory of Wheat Biology and Genetic Improvement, Jinan, 250100 China
| | - Jian Ma
- College of Agronomy, Jilin Agricultural University, Changchun, 130118 China
| | - Jun Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
| | - Yong-Bin Zhou
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
| | - Ming Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
| | - You-Zhi Ma
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
| | - Jun-Hua Zhang
- College of Agronomy, Northeast Agricultural University, Harbin, 150030 China
| | - Zhao-Shi Xu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, 100081 China
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166
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Yousefirad S, Soltanloo H, Ramezanpour SS, Zaynali Nezhad K, Shariati V. The RNA-seq transcriptomic analysis reveals genes mediating salt tolerance through rapid triggering of ion transporters in a mutant barley. PLoS One 2020; 15:e0229513. [PMID: 32187229 PMCID: PMC7080263 DOI: 10.1371/journal.pone.0229513] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/09/2020] [Indexed: 12/23/2022] Open
Abstract
Considering the complex nature of salinity tolerance mechanisms, the use of isogenic lines or mutants possessing the same genetic background albeit different tolerance to salinity is a suitable method for reduction of analytical complexity to study these mechanisms. In the present study, whole transcriptome analysis was evaluated using RNA-seq method between a salt-tolerant mutant line "M4-73-30" and its wild-type "Zarjou" cultivar at seedling stage after six hours of exposure to salt stress (300 mM NaCl). Transcriptome sequencing yielded 20 million reads for each genotype. A total number of 7116 transcripts with differential expression were identified, 1586 and 1479 of which were obtained with significantly increased expression in the mutant and the wild-type, respectively. In addition, the families of WRKY, ERF, AP2/EREBP, NAC, CTR/DRE, AP2/ERF, MAD, MIKC, HSF, and bZIP were identified as the important transcription factors with specific expression in the mutant genotype. The RNA-seq results were confirmed at several time points using qRT-PCR for some important salt-responsive genes. In general, the results revealed that the mutant accumulated higher levels of sodium ion in the root and decreased its transfer to the shoot. Also, the mutant increased the amount of potassium ion leading to the maintenance a high ratio [K+]/[Na+] in the shoot compared to its wild-type via fast stomata closure and consequently transpiration reduction under the salt stress. Moreover, a reduction in photosynthesis and respiration was observed in the mutant, resulting in utilization of the stored energy and the carbon for maintaining the plant tissues, which is considered as a mechanism of salt tolerance in plants. Up-regulation of catalase, peroxidase, and ascorbate peroxidase genes has resulted in higher accumulation of H2O2 in the wild-type compared to the mutant. Therefore, the wild-type initiated rapid ROS signals which led to less oxidative scavenging in comparison with the mutant. The mutant increased expression in the ion transporters and the channels related to the salinity to maintain the ion homeostasis. In overall, the results demonstrated that the mutant responded better to the salt stress under both osmotic and ionic stress phases and lower damage was observed in the mutant compared to its wild-type under the salt stress.
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Affiliation(s)
- Sareh Yousefirad
- Department of Plant Breeding and Plant Biotechnolgy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Golestan, Iran
| | - Hassan Soltanloo
- Department of Plant Breeding and Plant Biotechnolgy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Golestan, Iran
| | - Seyedeh Sanaz Ramezanpour
- Department of Plant Breeding and Plant Biotechnolgy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Golestan, Iran
| | - Khalil Zaynali Nezhad
- Department of Plant Breeding and Plant Biotechnolgy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Golestan, Iran
| | - Vahid Shariati
- Department of Genome Center, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
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167
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Sampangi-Ramaiah MH, Jagadheesh, Dey P, Jambagi S, Vasantha Kumari MM, Oelmüller R, Nataraja KN, Venkataramana Ravishankar K, Ravikanth G, Uma Shaanker R. An endophyte from salt-adapted Pokkali rice confers salt-tolerance to a salt-sensitive rice variety and targets a unique pattern of genes in its new host. Sci Rep 2020; 10:3237. [PMID: 32094443 PMCID: PMC7039991 DOI: 10.1038/s41598-020-59998-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 02/04/2020] [Indexed: 11/25/2022] Open
Abstract
Endophytes, both of bacterial and fungal origin, are ubiquitously present in all plants. While their origin and evolution are enigmatic, there is burgeoning literature on their role in promoting growth and stress responses in their hosts. We demonstrate that a salt-tolerant endophyte isolated from salt-adapted Pokkali rice, a Fusarium sp., colonizes the salt-sensitive rice variety IR-64, promotes its growth under salt stress and confers salinity stress tolerance to its host. Physiological parameters, such as assimilation rate and chlorophyll stability index were higher in the colonized plants. Comparative transcriptome analysis revealed 1348 up-regulated and 1078 down-regulated genes in plants colonized by the endophyte. Analysis of the regulated genes by MapMan and interaction network programs showed that they are involved in both abiotic and biotic stress tolerance, and code for proteins involved in signal perception (leucine-rich repeat proteins, receptor-like kinases) and transduction (Ca2+ and calmodulin-binding proteins), transcription factors, secondary metabolism and oxidative stress scavenging. For nine genes, the data were validated by qPCR analysis in both roots and shoots. Taken together, these results show that salt-adapted Pokkali rice varieties are powerful sources for the identification of novel endophytes, which can be used to confer salinity tolerance to agriculturally important, but salt-sensitive rice varieties.
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Affiliation(s)
| | - Jagadheesh
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, 560065, India
| | - Prajjal Dey
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, 560065, India
| | - Shridhar Jambagi
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, 560065, India
| | - M M Vasantha Kumari
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, 560065, India
| | - Ralf Oelmüller
- Friedrich-Schiller - University, Institute of General Botany and Plant Physiology, Dornbuger Str. 159, 07743, Jena, Germany
| | - Karaba N Nataraja
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, 560065, India
| | | | - G Ravikanth
- Ashoka Trust for Research in Ecology and the Environment, Royal Enclave, Srirampura, Jakkur Post, Bangalore, 560064, India
| | - R Uma Shaanker
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, 560065, India.
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, 560065, India.
- Ashoka Trust for Research in Ecology and the Environment, Royal Enclave, Srirampura, Jakkur Post, Bangalore, 560064, India.
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168
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Tan X, Li S, Hu L, Zhang C. Genome-wide analysis of long non-coding RNAs (lncRNAs) in two contrasting rapeseed (Brassica napus L.) genotypes subjected to drought stress and re-watering. BMC PLANT BIOLOGY 2020; 20:81. [PMID: 32075594 PMCID: PMC7032001 DOI: 10.1186/s12870-020-2286-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 02/12/2020] [Indexed: 05/23/2023]
Abstract
BACKGROUND Drought stress is a major abiotic factor that affects rapeseed (Brassica napus L.) productivity. Though previous studies indicated that long non-coding RNAs (lncRNAs) play a key role in response to drought stress, a scheme for genome-wide identification and characterization of lncRNAs' response to drought stress is still lacking, especially in the case of B. napus. In order to further understand the molecular mechanism of the response of B. napus to drought stress, we compared changes in the transcriptome between Q2 (a drought-tolerant genotype) and Qinyou8 (a drought-sensitive genotype) responding drought stress and rehydration treatment at the seedling stage. RESULTS A total of 5546 down-regulated and 6997 up-regulated mRNAs were detected in Q2 compared with 7824 and 10,251 in Qinyou8, respectively; 369 down-regulated and 108 up- regulated lncRNAs were detected in Q2 compared with 449 and 257 in Qinyou8, respectively. LncRNA-mRNA interaction network analysis indicated that the co-expression network of Q2 was composed of 145 network nodes and 5175 connections, while the co-expression network of Qinyou8 was composed of 305 network nodes and 22,327 connections. We further identified 34 transcription factors (TFs) corresponding to 126 differentially expressed lncRNAs in Q2, and 45 TFs corresponding to 359 differentially expressed lncRNAs in Qinyou8. Differential expression analysis of lncRNAs indicated that up- and down-regulated mRNAs co-expressed with lncRNAs participated in different metabolic pathways and were involved in different regulatory mechanisms in the two genotypes. Notably, some lncRNAs were co-expressed with BnaC07g44670D, which are associated with plant hormone signal transduction. Additionally, some mRNAs co-located with XLOC_052298, XLOC_094954 and XLOC_012868 were mainly categorized as signal transport and defense/stress response. CONCLUSIONS The results of this study increased our understanding of expression characterization of rapeseed lncRNAs in response to drought stress and re-watering, which would be useful to provide a reference for the further study of the function and action mechanisms of lncRNAs under drought stress and re-watering.
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Affiliation(s)
- Xiaoyu Tan
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Su Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Liyong Hu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Chunlei Zhang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.
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169
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Lv B, Wu Q, Wang A, Li Q, Dong Q, Yang J, Zhao H, Wang X, Chen H, Li C. A WRKY transcription factor, FtWRKY46, from Tartary buckwheat improves salt tolerance in transgenic Arabidopsis thaliana. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 147:43-53. [PMID: 31841961 DOI: 10.1016/j.plaphy.2019.12.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/03/2019] [Accepted: 12/03/2019] [Indexed: 05/06/2023]
Abstract
The WRKY transcription factor family includes plant-specific transcription factors that are widely involved in plant biotic and abiotic stress responses, growth and development. Tartary buckwheat is a type of small grain with strong resistance to adverse growing conditions. No systematic exploration of the WRKY family in Tartary buckwheat has yet been reported. In this paper, we report the FtWRKY46 gene from Tartary buckwheat and study its role in salt tolerance. FtWRKY46 has transcriptional activation activity in yeast, and FtWRKY46 fused to yellow fluorescent protein localizes to the nucleus. Further studies have found that its transcriptional activation region is located at the N-terminus. A yeast one-hybrid assay indicated that FtWRKY46 could bind to a W-box and activate reporter gene expression. Similarly, transient cotransfection showed that FtWRKY46 could specifically bind to W-box regions and activate reporter gene expression in plants. Furthermore, ectopic expression of FtWRKY46 could enhance Arabidopsis tolerance to salt stress. More specifically, the seed germination rate, root length, chlorophyll content and proline content were significantly higher in transgenic plants ectopically expressing FtWRKY46 than in WT plants after salt stress (P < 0.05), while MDA levels were significantly lower than in WT plants (P < 0.05). Additionally, salt treatment increased the expression of stress-related genes. To summarize, our results suggest that ectopic expression of FtWRKY46 enhance the stress tolerance of transgenic plants by modulating ROS clearance and stress-related gene expression.
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Affiliation(s)
- Bingbing Lv
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Qi Wu
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Anhu Wang
- Xichang College, 615013, Xichang, Sichuan, China
| | - Qi Li
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Qixin Dong
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Jingjing Yang
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Haixia Zhao
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Xiaoli Wang
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Hui Chen
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China
| | - Chenglei Li
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya'an, 625014, Sichuan, China.
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170
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Morpho-physiological and biochemical responses of finger millet (Eleusine coracana (L.) Gaertn.) genotypes to PEG-induced osmotic stress. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2019.101488] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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171
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Ma Y, Dias MC, Freitas H. Drought and Salinity Stress Responses and Microbe-Induced Tolerance in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:591911. [PMID: 33281852 PMCID: PMC7691295 DOI: 10.3389/fpls.2020.591911] [Citation(s) in RCA: 174] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/19/2020] [Indexed: 05/19/2023]
Abstract
Drought and salinity are among the most important environmental factors that hampered agricultural productivity worldwide. Both stresses can induce several morphological, physiological, biochemical, and metabolic alterations through various mechanisms, eventually influencing plant growth, development, and productivity. The responses of plants to these stress conditions are highly complex and depend on other factors, such as the species and genotype, plant age and size, the rate of progression as well as the intensity and duration of the stresses. These factors have a strong effect on plant response and define whether mitigation processes related to acclimation will occur or not. In this review, we summarize how drought and salinity extensively affect plant growth in agriculture ecosystems. In particular, we focus on the morphological, physiological, biochemical, and metabolic responses of plants to these stresses. Moreover, we discuss mechanisms underlying plant-microbe interactions that confer abiotic stress tolerance.
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172
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Hu Z, Ban Q, Hao J, Zhu X, Cheng Y, Mao J, Lin M, Xia E, Li Y. Genome-Wide Characterization of the C-repeat Binding Factor (CBF) Gene Family Involved in the Response to Abiotic Stresses in Tea Plant ( Camellia sinensis). FRONTIERS IN PLANT SCIENCE 2020; 11:921. [PMID: 32849669 PMCID: PMC7396485 DOI: 10.3389/fpls.2020.00921] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 06/05/2020] [Indexed: 05/18/2023]
Abstract
C-repeat (CRT)/dehydration responsive element (DRE)-binding factor CBFs, a small family of genes encoding transcriptional activators, play important roles in plant cold tolerance. In this study, a comprehensive genome-wide analysis was carried out to identify and characterize the functional dynamics of CsCBFs in tea plant (Camellia sinensis). A total of 6 CBF genes were obtained from the tea plant genome and named CBF1-6. All of the CsCBFs had an AP2/ERF DNA-binding domain and nuclear localization signal (NLS) sequence. CsCBF-eGFP fusion and DAPI staining analysis confirmed the nuclear localization of the CsCBFs. Transactivation assays showed that the CsCBFs, except CsCBF1, had transcriptional activity. CsCBF expression was differentially induced by cold, heat, PEG, salinity, ABA, GA, MeJA, and SA stresses. In particular, the CsCBF genes were significantly induced by cold treatments. To further characterize the functions of CsCBF genes, we overexpressed the CsCBF3 gene in Arabidopsis thaliana plants. The resulting transgenic plants showed increased cold tolerance compared with the wild-type Arabidopsis plant. The enhanced cold tolerance of the transgenic plants was potentially achieved through an ABA-independent pathway. This study will help to increase our understanding of CsCBF genes and their contributions to stress tolerance in tea plants.
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173
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Al-Arjani ABF, Hashem A, Abd_Allah EF. Arbuscular mycorrhizal fungi modulates dynamics tolerance expression to mitigate drought stress in Ephedra foliata Boiss. Saudi J Biol Sci 2020; 27:380-394. [PMID: 31889861 PMCID: PMC6933241 DOI: 10.1016/j.sjbs.2019.10.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 10/13/2019] [Accepted: 10/20/2019] [Indexed: 01/19/2023] Open
Abstract
Arbuscular mycorrhizal fungi (AMF) are one of the most important drivers of soil ecosystem dynamics. AMF have the potential to improve plant growth and development by modulating key hormonal pathways, which result in decreasing the adverse impact of abiotic stress, such as drought. Pot experiments were conducted in this study to investigate the ability of AMF to ameliorate the adverse impact of drought in Ephedra foliate. Non-inoculated AMF E. foliate (Ef) plants, exhibited reduced growth in response to drought stress with a concomitant lowering of chlorophyll pigments, relative to non-stressed and AMF inoculated plant. AMF inoculated E. foliate showed improved nitrogen metabolism by positively regulating nitrate and nitrite reductase activity which results in greater ammonium availability for the synthesis of amino acids. Inoculation with AMF also increased antioxidant enzyme activity, ascorbic acid contents, and reduction in glutathione level. This resulted in significant amelioration of oxidative damage to plant membranes by restricting the excess generation of reactive oxygen species (ROS), such as hydrogen peroxide. Greater content of proline, glucose, and total soluble protein in AMF-inoculated plants provided further benefit to E. foliate plants and their ability to withstand drought stress, and also evident by a greater level of sucrose phosphate synthase activity. AMF significantly enhanced the uptake of essential nutrients like K, Mg, and Ca. Importantly, higher concentrations of plant hormones, including indole acetic acid (IAA), indole butyric acid (IBA), gibberellic acid (GA), and abscisic acid (ABA), were maintained in AMF-inoculated Ef plants. AMF inoculation also boosted phosphorous metabolism by increasing alkaline and acid phosphatase enzyme activity. In summary, AMF-inoculation of Ef plants significantly reduced the deleterious effect of drought stress by up-regulating the antioxidant defense system, synthesis of osmolytes, and maintaining phytohormone levels.
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Affiliation(s)
- Al-Bandari Fahad Al-Arjani
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza 12511, Egypt
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
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174
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Efferth T, Saeed ME, Kadioglu O, Seo EJ, Shirooie S, Mbaveng AT, Nabavi SM, Kuete V. Collateral sensitivity of natural products in drug-resistant cancer cells. Biotechnol Adv 2020; 38:107342. [DOI: 10.1016/j.biotechadv.2019.01.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 01/17/2019] [Accepted: 01/26/2019] [Indexed: 01/25/2023]
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175
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Li B, Liu G, Wang Y, Wei Y, Shi H. Overexpression of Banana ATG8f Modulates Drought Stress Resistance in Arabidopsis. Biomolecules 2019; 9:biom9120814. [PMID: 31810306 PMCID: PMC6995610 DOI: 10.3390/biom9120814] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 11/28/2019] [Accepted: 11/28/2019] [Indexed: 12/13/2022] Open
Abstract
Autophagy is essential for plant growth, development, and stress resistance. However, the involvement of banana autophagy-related genes in drought stress response and the underlying mechanism remain elusive. In this study, we found that the transcripts of 10 banana ATG8s responded to drought stress in different ways, and MaATG8f with the highest transcript in response to drought stress among them was chosen for functional analysis. Overexpression of MaATG8f improved drought stress resistance in Arabidopsis, with lower malonaldehyde level and higher level of assimilation rate. On the one hand, overexpression of MaATG8f activated the activities of superoxide dismutase, catalase, and peroxidase under drought stress conditions, so as to regulate reactive oxygen species accumulation. On the other hand, MaATG8f-overexpressing lines exhibited higher endogenous abscisic acid (ABA) level and more sensitivity to abscisic acid. Notably, the autophagosomes as visualized by CaMV35S::GFP–MaATG8f was activated after ABA treatment. Taken together, overexpression of MaATG8f positively regulated plant drought stress resistance through modulating reactive oxygen species metabolism, abscisic acid biosynthesis, and autophagic activity.
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Affiliation(s)
- Bing Li
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
| | - Guoyin Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
- College of Forestry, Hainan University, Haikou 570228, China;
| | - Yuqi Wang
- College of Forestry, Hainan University, Haikou 570228, China;
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
- Correspondence: (Y.W.); (H.S.); Tel.: +86-898-6616-0721 (Y.W. & H.S.)
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou 570228, China; (B.L.); (G.L.)
- Correspondence: (Y.W.); (H.S.); Tel.: +86-898-6616-0721 (Y.W. & H.S.)
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176
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Lin J, Dang F, Chen Y, Guan D, He S. CaWRKY27 negatively regulates salt and osmotic stress responses in pepper. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 145:43-51. [PMID: 31665666 DOI: 10.1016/j.plaphy.2019.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 07/29/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
WRKY transcription factors are key regulatory components of plant responses to both biotic and abiotic stresses. In pepper (Capsicum annuum), CaWRKY27 positively regulates resistance to the pathogenic bacterium Ralstonia solanacearum and negatively regulates thermotolerance. Here, we report that CaWRKY27 functions in the response to salinity and osmotic stress. CaWRKY27 transcription was induced by salinity, osmotic, and abscisic acid (ABA) treatments, as determined using qPCR and GUS assays. Transgenic Arabidopsis thaliana and tobacco (Nicotiana tabacum) plants heterologously expressing CaWRKY27 had an increased sensitivity to salinity and osmotic stress, with a higher inhibition of both root elongation and whole plant growth, more severe chlorosis and wilting, lower germination rates, and an enhanced germination sensitivity to ABA than the corresponding wild-type plants. Furthermore, most marker genes associated with reactive oxygen species (ROS) detoxification and polyamine and ABA biosynthesis, as well as stress-responsive genes NtDREB3, were downregulated in plants transgenically expressing CaWRKY27 upon exposure to salinity or osmotic stress. Consistently, silencing of CaWRKY27 using virus-induced gene silencing conferred tolerance to salinity and osmotic stress in pepper plants. These findings suggest that CaWRKY27 acts as a molecular link in the antagonistic crosstalk regulating the expression of defense-related genes in the responses to both abiotic and biotic stresses by acting either as a transcriptional activator or repressor in pepper.
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Affiliation(s)
- Jinhui Lin
- Key Laboratory of Plant Genetic Improvement and Comprehensive Utilization of the Ministry of Education, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Fengfeng Dang
- Key Laboratory of Plant Genetic Improvement and Comprehensive Utilization of the Ministry of Education, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Yongping Chen
- College of Horticulture Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Deyi Guan
- Key Laboratory of Plant Genetic Improvement and Comprehensive Utilization of the Ministry of Education, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Shuilin He
- Key Laboratory of Plant Genetic Improvement and Comprehensive Utilization of the Ministry of Education, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.
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177
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Buti M, Baldoni E, Formentin E, Milc J, Frugis G, Lo Schiavo F, Genga A, Francia E. A Meta-Analysis of Comparative Transcriptomic Data Reveals a Set of Key Genes Involved in the Tolerance to Abiotic Stresses in Rice. Int J Mol Sci 2019; 20:E5662. [PMID: 31726733 PMCID: PMC6888222 DOI: 10.3390/ijms20225662] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/05/2019] [Accepted: 11/10/2019] [Indexed: 12/16/2022] Open
Abstract
Several environmental factors, such as drought, salinity, and extreme temperatures, negatively affect plant growth and development, which leads to yield losses. The tolerance or sensitivity to abiotic stressors are the expression of a complex machinery involving molecular, biochemical, and physiological mechanisms. Here, a meta-analysis on previously published RNA-Seq data was performed to identify the genes conferring tolerance to chilling, osmotic, and salt stresses, by comparing the transcriptomic changes between tolerant and susceptible rice genotypes. Several genes encoding transcription factors (TFs) were identified, suggesting that abiotic stress tolerance involves upstream regulatory pathways. A gene co-expression network defined the metabolic and signalling pathways with a prominent role in the differentiation between tolerance and susceptibility: (i) the regulation of endogenous abscisic acid (ABA) levels, through the modulation of genes that are related to its biosynthesis/catabolism, (ii) the signalling pathways mediated by ABA and jasmonic acid, (iii) the activity of the "Drought and Salt Tolerance" TF, involved in the negative regulation of stomatal closure, and (iv) the regulation of flavonoid biosynthesis by specific MYB TFs. The identified genes represent putative key players for conferring tolerance to a broad range of abiotic stresses in rice; a fine-tuning of their expression seems to be crucial for rice plants to cope with environmental cues.
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Affiliation(s)
- Matteo Buti
- Department of Life Sciences, Centre BIOGEST-SITEIA, University of Modena and Reggio Emilia, Via Amendola 2, 42124 Reggio Emilia, Italy; (M.B.); (J.M.); (E.F.)
- Present address: Department of Agriculture, Food, Environment and Forestry, University of Florence, 50144 Florence, Italy
| | - Elena Baldoni
- National Research Council (CNR), Institute of Agricultural Biology and Biotechnology (IBBA), Via Bassini 15, 20133 Milano, Italy;
- CNR-IBBA, Rome Unit, via Salaria Km. 29,300, 00015 Monterotondo Scalo (Roma), Italy;
| | - Elide Formentin
- Department of Biology, University of Padova, 35131 Padova, Italy; (E.F.); (F.L.S.)
- Botanical Garden, University of Padova, 35123 Padova, Italy
| | - Justyna Milc
- Department of Life Sciences, Centre BIOGEST-SITEIA, University of Modena and Reggio Emilia, Via Amendola 2, 42124 Reggio Emilia, Italy; (M.B.); (J.M.); (E.F.)
| | - Giovanna Frugis
- CNR-IBBA, Rome Unit, via Salaria Km. 29,300, 00015 Monterotondo Scalo (Roma), Italy;
| | - Fiorella Lo Schiavo
- Department of Biology, University of Padova, 35131 Padova, Italy; (E.F.); (F.L.S.)
- Botanical Garden, University of Padova, 35123 Padova, Italy
| | - Annamaria Genga
- National Research Council (CNR), Institute of Agricultural Biology and Biotechnology (IBBA), Via Bassini 15, 20133 Milano, Italy;
| | - Enrico Francia
- Department of Life Sciences, Centre BIOGEST-SITEIA, University of Modena and Reggio Emilia, Via Amendola 2, 42124 Reggio Emilia, Italy; (M.B.); (J.M.); (E.F.)
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178
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Lin KH, Sei SC, Su YH, Chiang CM. Overexpression of the Arabidopsis and winter squash superoxide dismutase genes enhances chilling tolerance via ABA-sensitive transcriptional regulation in transgenic Arabidopsis. PLANT SIGNALING & BEHAVIOR 2019; 14:1685728. [PMID: 31680612 PMCID: PMC6866689 DOI: 10.1080/15592324.2019.1685728] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/15/2019] [Accepted: 10/16/2019] [Indexed: 05/31/2023]
Abstract
The winter squash (Cucurbita moschata, Cm) superoxide dismutase (SOD) CmSOD gene and Arabidopsis thaliana (At)SOD gene were transferred under a ubiquitin promoter into Arabidopsis via Agrobacterium tumefaciens. The expression and amount of SOD and the SOD activities in the AtSOD and CmSOD transgenic lines were significantly higher than those of non-transgenic (NT) plants exposed to 23 or 4°C treatment for 6 ~ 192-h periods. Furthermore, expressions of the cold-inducible gene (AtCBF2) and desiccation-responsible transcription factors (AtRD29A/B) were also activated in all transgenic lines compared to NT plants after chilling treatments. Compared to NT plants under chilling stress, superoxide (•O2-) accumulation was significantly lower, and chlorophyll (Chl) contents were significantly higher in all transgenic lines with higher SOD activity. Moreover, Arabidopsis seedlings overexpressing AtSOD and CmSOD also displayed greater resistance to chilling and less oxidative injury than NT plants under chilled conditions, indicating that the overexpression of AtSOD and CmSOD in Arabidopsis enhanced chilling tolerance by eliminating •O2-. The expression of AtRD29A was strongly up-regulated only in AtSOD transgenic plants treated with abscisic acid (ABA), while it was repressed in other transgenic plants, indicating ABA-sensitive AtCBF2 and AtRD29A/B transcriptional regulation signaling pathways in transgenic Arabidopsis under chilling conditions.
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MESH Headings
- Abscisic Acid/pharmacology
- Adaptation, Physiological/drug effects
- Adaptation, Physiological/genetics
- Arabidopsis/drug effects
- Arabidopsis/genetics
- Arabidopsis/physiology
- Chlorophyll/metabolism
- Cold Temperature
- Cucurbita/enzymology
- Cucurbita/genetics
- Gene Expression Regulation, Plant/drug effects
- Genes, Plant
- Plants, Genetically Modified
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Regeneration/drug effects
- Stress, Physiological/drug effects
- Stress, Physiological/genetics
- Superoxide Dismutase/genetics
- Superoxide Dismutase/metabolism
- Superoxides/metabolism
- Transcription, Genetic/drug effects
- Transformation, Genetic
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Affiliation(s)
- Kuan-Hung Lin
- Department of Horticulture and Biotechnology, Chinese Culture University, Taipei, Taiwan
| | - Sin-Ci Sei
- Department of Biotechnology, Ming Chuan University, Taoyuan, Taiwan
| | - Yu-Huei Su
- Department of Biotechnology, Ming Chuan University, Taoyuan, Taiwan
| | - Chih-Ming Chiang
- Department of Biotechnology, Ming Chuan University, Taoyuan, Taiwan
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179
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Ren YR, Yang YY, Zhang R, You CX, Zhao Q, Hao YJ. MdGRF11, an apple 14-3-3 protein, acts as a positive regulator of drought and salt tolerance. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 288:110219. [PMID: 31521216 DOI: 10.1016/j.plantsci.2019.110219] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/11/2019] [Accepted: 08/12/2019] [Indexed: 05/22/2023]
Abstract
The 14-3-3 proteins are a family of highly conserved phosphoserine-binding proteins that participate in the regulation of diverse physiological and developmental processes. In this research, twenty 14-3-3 genes in apples, which contained a highly conserved 14-3-3 domain, were identified and divided into two subgroups. Among them, MdGRF11 was further cloned and investigated. qRT-PCR analyses and GUS staining show that MdGRF11 is expressed in various organs and tissues with the highest expression levels found in the fruit. MdGRF11 was upregulated by polyethylene glycol 6000 (PEG 6000), NaCl, abscisic acid (ABA) and low temperature (4 °C) treatments. MdGRF11-overexpressing transgenic Arabidopsis and apple calli exhibited reduced sensitivity to salt and PEG 6000 treatments. Moreover, the ectopic expression of MdGRF11 improved the tolerance of transgenic tobacco to salt and drought stresses, which grew longer roots, underwent more growth, and presented higher chlorophyll levels than the wild-type control under salt and drought stress conditions. Furthermore, MdGRF11 expression remarkably reduced electrolyte leakage, malondialdehyde content levels, H2O2 and O2- accumulation under salt and drought stress conditions, which relied on the regulation of ROS-scavenging signaling to reduce oxidative damage of cells after salt and drought stress treatment. MdGRF11 also enhanced tolerance to stress by upregulating expression levels of ROS-scavenging and stress-related genes, especially improving responses to drought stress by modifying the water loss rates and stomatal aperture. Moreover, MdGRF11 could interact with MdAREB/ABF transcription factors through yeast two hybrid analyses. In conclusion, our results indicate that MdGRF11 acts as a positive regulator of salt and drought stress responses through regulating ROS scavenging and other signaling systems.
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Affiliation(s)
- Yi-Ran Ren
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Yu-Ying Yang
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Rui Zhang
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Chun-Xiang You
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Qiang Zhao
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China.
| | - Yu-Jin Hao
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China.
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180
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Magwanga RO, Kirungu JN, Lu P, Yang X, Dong Q, Cai X, Xu Y, Wang X, Zhou Z, Hou Y, Nyunja R, Agong SG, Hua J, Zhang B, Wang K, Liu F. Genome wide identification of the trihelix transcription factors and overexpression of Gh_A05G2067 (GT-2), a novel gene contributing to increased drought and salt stresses tolerance in cotton. PHYSIOLOGIA PLANTARUM 2019; 167:447-464. [PMID: 30629305 PMCID: PMC6850275 DOI: 10.1111/ppl.12920] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/03/2019] [Accepted: 01/06/2019] [Indexed: 05/20/2023]
Abstract
We identified 102, 51 and 51 proteins encoded by the trihelix genes in Gossypium hirsutum, Gossypium arboreum and Gossypium raimondii, respectively. RNA sequence data and real-time quantitative polymerase chain reaction analysis showed that Gh_A05G2067 (GT-2) was highly upregulated under drought and salt stress conditions. Transient expression of GT-2-green fluorescent protein fusion protein in protoplast showed that GT-2 was localized in the nucleus. The overexpression of GT-2 conferred an enhanced drought tolerance to cotton, with lower malondialdehyde, hydrogen peroxide contents and higher reactive oxygen scavenging enzyme activities. Moreover, chlorophyll content, relative leaf water content (RLWC), excised leaf water loss (ELWL) and cell membrane stability (CMS) were relatively stable in the GT-2-overexpressed lines compared to wild-type (WT). Similarly, stress-responsive genes RD29A, SOS1, ABF4 and CBL1 were highly upregulated in the GT-2-overexpressed lines but were significantly downregulated in WT. In addition, the GT-2-silenced cotton plants exhibited a high level of oxidation injury, due to high levels of oxidant enzymes, in addition to negative effects on CMS, ELWL, RLWC and chlorophyll content. These results mark the foundation for future exploration of the trihelix genes in cotton, with an aim of developing more resilient, versatile and highly tolerant cotton genotypes.
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Affiliation(s)
- Richard O. Magwanga
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
- Jaramogi Oginga OdingaUniversity of Science and TechnologySchool of Biological and Physical Sciences (SBPS), P.O Box 210‐40601, BondoKenya
| | - Joy N. Kirungu
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Pu Lu
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Xiu Yang
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Qi Dong
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Xiaoyan Cai
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Yanchao Xu
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Xingxing Wang
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Zhongli Zhou
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Yuqing Hou
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Regina Nyunja
- Jaramogi Oginga OdingaUniversity of Science and TechnologySchool of Biological and Physical Sciences (SBPS), P.O Box 210‐40601, BondoKenya
| | - Stephen G. Agong
- Jaramogi Oginga OdingaUniversity of Science and TechnologySchool of Biological and Physical Sciences (SBPS), P.O Box 210‐40601, BondoKenya
| | | | - Baohong Zhang
- North Carolina State UniversityRaleighNorth Carolina
| | - Kunbo Wang
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
| | - Fang Liu
- Institute of Cotton ResearchChinese Academy of Agricultural Science (ICR, CAAS)/State Key Laboratory of Cotton BiologyAnyang 455000China
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181
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Wang P, Yang Y, Shi H, Wang Y, Ren F. Small RNA and degradome deep sequencing reveal respective roles of cold-related microRNAs across Chinese wild grapevine and cultivated grapevine. BMC Genomics 2019; 20:740. [PMID: 31615400 PMCID: PMC6794902 DOI: 10.1186/s12864-019-6111-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 09/20/2019] [Indexed: 12/28/2022] Open
Abstract
Background Chinese wild grapevine (Vitis amurensis) has remarkable cold stress tolerance, exceeding that of the common cultivated grapevine (Vitis vinifera L.). Result Here, we surveyed the expression dynamics of microRNAs (miRNAs) across Chinese wild grapevine (cv. Beibinghong) and cultivated grapevine (cv. Cabernet Sauvignon) under cold stress using high-throughput sequencing. We identified 186 known miRNAs in cultivated grape and 427 known miRNAs in Beibinghong. Of the identified miRNAs, 59 are conserved miRNAs orthologous in Cabernet Sauvignon and Beibinghong. In addition, 105 and 129 novel miRNAs were identified in Cabernet Sauvignon and Beibinghong, respectively. The expression of some miRNAs was related to cold stress both in Cabernet Sauvignon and Beibinghong. Many cold-related miRNAs in Cabernet Sauvignon and Beibinghong were predicted to target stress response-related genes such as MYB, WRKY, bHLH transcription factor genes, and heat shock protein genes. However, the expression tendency under cold treatment of many of these miRNAs was different between Cabernet Sauvignon and Beibinghong. Different modes of expression of cultivated and Chinese wild grape miRNAs were indicated in key pathways under cold stress by degradome, target prediction, GO, and KEGG analyses. Conclusion Our study indicated three likely reasons that led to the different cold stress tolerance levels of Cabernet Sauvignon and Beibinghong. Specifically, there may be (1) differential expression of orthologous miRNAs between cultivated grapevine and Chinese wild grape; (2) species-specific miRNAs or target genes; or (3) different regulatory models of miRNAs in cultivated and Chinese wild grape in some key pathways.
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Affiliation(s)
- Pengfei Wang
- Shandong Academy of Grape; Shandong engineering research center for Grape cultivation and deep-processing, Jinan, People's Republic of China.
| | - Yang Yang
- Shandong Academy of Grape; Shandong engineering research center for Grape cultivation and deep-processing, Jinan, People's Republic of China
| | - Hongmei Shi
- Shandong Academy of Grape; Shandong engineering research center for Grape cultivation and deep-processing, Jinan, People's Republic of China.
| | - Yongmei Wang
- Shandong Academy of Grape; Shandong engineering research center for Grape cultivation and deep-processing, Jinan, People's Republic of China.,Shandong engineering research center for cultivation and deep-processing of grape, Jinan, People's Republic of China.,Key Laboratory of Urban Agriculture (East China), Ministry of Agriculture, Jinan, People's Republic of China
| | - Fengshan Ren
- Shandong Academy of Grape; Shandong engineering research center for Grape cultivation and deep-processing, Jinan, People's Republic of China. .,Shandong engineering research center for cultivation and deep-processing of grape, Jinan, People's Republic of China. .,Key Laboratory of Urban Agriculture (East China), Ministry of Agriculture, Jinan, People's Republic of China.
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182
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Kashash Y, Holland D, Porat R. Molecular mechanisms involved in postharvest chilling tolerance of pomegranate fruit. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:5617-5623. [PMID: 31321784 DOI: 10.1002/jsfa.9933] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/14/2019] [Accepted: 07/15/2019] [Indexed: 06/10/2023]
Abstract
Cold storage of pomegranates is essential for prolonging postharvest storage and for the implementation of cold-quarantine insect disinfestation treatments required for international trading. However, pomegranates are chilling sensitive; they may develop chilling injuries upon exposure to unfavorable low temperatures. In this mini-review, we summarize molecular data obtained from three different RNA Seq transcriptome analyses of responses of pomegranate fruits to cold storage. These experiments included comparisons among the transcriptomic responses following a 2-week exposure to 1 °C in three different model systems: 1) unconditioned chilling-sensitive fruits versus relatively chilling-tolerant low-temperature-conditioned fruits; 2) chilling-sensitive early harvested fruits versus relatively chilling-tolerant late-harvested ones; and 3) chilling-sensitive 'Ganesh' variety versus the relatively chilling-tolerant 'Wonderful' variety. Comparisons among differentially expressed transcripts that were exclusively and significantly up-regulated in the relatively chilling-tolerant fruits in all three model systems enabled identification of 573 common chilling tolerance-associated genes in pomegranates. Functional categorization and classification of the differentially expressed transcripts revealed several regulatory, metabolic, and stress-adaptation pathways that were uniquely activated in response to cold storage in relatively chilling-tolerant fruits. More specifically, we identified common up-regulation of transcripts involved in activation of jasmonic acid and ethylene hormone biosynthesis and signaling, stress-related transcription factors, calcium and MAPK signaling, starch degradation and galactinol and raffinose biosynthesis, phenol biosynthesis, lipid metabolism, and heat-shock proteins. We hypothesized these pathways to be involved in imparting chilling tolerance to pomegranate fruits. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Yael Kashash
- Department of Postharvest Science, ARO, The Volcani Center, Rishon LeZion, Israel
- The Robert H Smith Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Doron Holland
- Department of Fruit Tree Sciences, ARO, Newe Ya'ar Research Center, Ramat Yishay, Israel
| | - Ron Porat
- Department of Postharvest Science, ARO, The Volcani Center, Rishon LeZion, Israel
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183
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Wei W, Liang DW, Bian XH, Shen M, Xiao JH, Zhang WK, Ma B, Lin Q, Lv J, Chen X, Chen SY, Zhang JS. GmWRKY54 improves drought tolerance through activating genes in abscisic acid and Ca 2+ signaling pathways in transgenic soybean. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 100:384-398. [PMID: 31271689 DOI: 10.1111/tpj.14449] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 05/31/2019] [Accepted: 06/27/2019] [Indexed: 05/18/2023]
Abstract
WRKY transcription factors play important roles in response to various abiotic stresses. Previous study have proved that soybean GmWRKY54 can improve stress tolerance in transgenic Arabidopsis. Here, we generated soybean transgenic plants and further investigated roles and biological mechanisms of GmWRKY54 in response to drought stress. We demonstrated that expression of GmWRKY54, driven by either a constitutive promoter (pCm) or a drought-induced promoter (RD29a), confers drought tolerance. GmWRKY54 is a transcriptional activator and affects a large number of stress-related genes as revealed by RNA sequencing. Gene ontology (GO) enrichment and co-expression network analysis, together with measurement of physiological parameters, supported the idea that GmWRKY54 enhances stomatal closure to reduce water loss, and therefore confers drought tolerance in soybean. GmWRKY54 directly binds to the promoter regions of genes including PYL8, SRK2A, CIPK11 and CPK3 and activates them. Therefore GmWRKY54 achieves its function through abscisic acid (ABA) and Ca2+ signaling pathways. It is valuable that GmWRKY54 activates an ABA receptor and an SnRK2 kinase in the upstream position, unlike other WRKY proteins that regulate downstream genes in the ABA pathway. Our study revealed the role of GmWRKY54 in drought tolerance and further manipulation of this gene should improve growth and production in soybean and other legumes/crops under unfavorable conditions.
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Affiliation(s)
- Wei Wei
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Da-Wei Liang
- Syngenta Biotechnology (China) Co., Ltd., Beijing, China
| | - Xiao-Hua Bian
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ming Shen
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jian-Hui Xiao
- Syngenta Biotechnology (China) Co., Ltd., Beijing, China
| | - Wan-Ke Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Biao Ma
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Qing Lin
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jian Lv
- Syngenta Biotechnology (China) Co., Ltd., Beijing, China
| | - Xi Chen
- Syngenta Biotechnology (China) Co., Ltd., Beijing, China
| | - Shou-Yi Chen
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jin-Song Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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184
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Fu L, Ding Z, Sun X, Zhang J. Physiological and Transcriptomic Analysis Reveals Distorted Ion Homeostasis and Responses in the Freshwater Plant Spirodela polyrhiza L. under Salt Stress. Genes (Basel) 2019; 10:genes10100743. [PMID: 31554307 PMCID: PMC6826491 DOI: 10.3390/genes10100743] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/14/2019] [Accepted: 09/21/2019] [Indexed: 01/02/2023] Open
Abstract
Duckweeds are a family of freshwater angiosperms with morphology reduced to fronds and propagation by vegetative budding. Unlike other angiosperm plants such as Arabidopsis and rice that have physical barriers between their photosynthetic organs and soils, the photosynthetic organs of duckweeds face directly to their nutrient suppliers (waters), therefore, their responses to salinity may be distinct. In this research, we found that the duckweed Spirodela polyrhiza L. accumulated high content of sodium and reduced potassium and calcium contents in large amounts under salt stress. Fresh weight, Rubisco and AGPase activities, and starch content were significantly decreaseded in the first day but recovered gradually in the following days and accumulated more starch than control from Day 3 to Day 5 when treated with 100 mM and 150 mM NaCl. A total of 2156 differentially expressed genes were identified. Overall, the genes related to ethylene metabolism, major CHO degradation, lipid degradation, N-metabolism, secondary metabolism of flavonoids, and abiotic stress were significantly increased, while those involved in cell cycle and organization, cell wall, mitochondrial electron transport of ATP synthesis, light reaction of photosynthesis, auxin metabolism, and tetrapyrrole synthesis were greatly inhibited. Moreover, salt stress also significantly influenced the expression of transcription factors that are mainly involved in abiotic stress and cell differentiation. However, most of the osmosensing calcium antiporters (OSCA) and the potassium inward channels were downregulated, Na+/H+ antiporters (SOS1 and NHX) and a Na+/Ca2+ exchanger were slightly upregulated, but most of them did not respond significantly to salt stress. These results indicated that the ion homeostasis was strongly disturbed. Finally, the shared and distinct regulatory networks of salt stress responses between duckweeds and other plants were intensively discussed. Taken together, these findings provide novel insights into the underlying mechanisms of salt stress response in duckweeds, and can be served as a useful foundation for salt tolerance improvement of duckweeds for the application in salinity conditions.
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Affiliation(s)
- Lili Fu
- Institute of Tropical Bioscience and Biotechnology, MOA Key Laboratory of Tropical Crops Biology and Genetic Resources, Hainan Academy of Tropical Agricultural Resource, Hainan Bioenergy Center, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, China.
| | - Zehong Ding
- Institute of Tropical Bioscience and Biotechnology, MOA Key Laboratory of Tropical Crops Biology and Genetic Resources, Hainan Academy of Tropical Agricultural Resource, Hainan Bioenergy Center, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, China.
| | - Xuepiao Sun
- Institute of Tropical Bioscience and Biotechnology, MOA Key Laboratory of Tropical Crops Biology and Genetic Resources, Hainan Academy of Tropical Agricultural Resource, Hainan Bioenergy Center, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, China.
| | - Jiaming Zhang
- Institute of Tropical Bioscience and Biotechnology, MOA Key Laboratory of Tropical Crops Biology and Genetic Resources, Hainan Academy of Tropical Agricultural Resource, Hainan Bioenergy Center, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou 571101, China.
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185
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Thakur S, Choudhary S, Dubey P, Bhardwaj P. Comparative transcriptome profiling reveals the reprogramming of gene networks under arsenic stress in Indian mustard. Genome 2019; 62:833-847. [PMID: 31518504 DOI: 10.1139/gen-2018-0152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Arsenic is a widespread toxic metalloid that is classified as a class I carcinogen known to cause adverse health effects in humans. In the present study, we investigated arsenic accumulation potential and comparative gene expression in Indian mustard. The amount of arsenic accumulated in shoots varied in the range of 15.99-1138.70 mg/kg on a dry weight basis among five cultivars. Comparative expression analysis revealed 10 870 significantly differentially expressed genes mostly belonging to response to stress, metabolic processes, signal transduction, transporter activity, and transcription regulator activity to be up-regulated, while most of the genes involved in photosynthesis, developmental processes, and cell growth were found to be down-regulated in arsenic-treated tissues. Further, pathway analysis using the KEGG Automated Annotation server (KAAS) revealed a large-scale reprogramming of genes involved in genetic and environmental information processing pathways. Top pathways with maximum KEGG orthology hits included carbon metabolism (2.5%), biosynthesis of amino acids (2.1%), plant hormone signal transduction (1.4%), and glutathione metabolism (0.6%). A transcriptomic investigation to understand the arsenic accumulation and detoxification in Indian mustard will not only help to improve its phytoremediation efficiency but also add to the control measures required to check bioaccumulation of arsenic in the food chain.
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Affiliation(s)
- Sapna Thakur
- Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India.,Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India
| | - Shruti Choudhary
- Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India.,Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India
| | - Preeti Dubey
- Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India.,Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India
| | - Pankaj Bhardwaj
- Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India.,Molecular Genetics Laboratory, Department of Plant Sciences, Central University of Punjab, Bathinda, India
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186
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Ben Saad R, Harbaoui M, Ben Romdhane W, Zouari N, Giang KN, Ben Hsouna A, Brini F. Overexpression of Triticum durum TdAnn12 gene confers stress tolerance through scavenging reactive oxygen species in transgenic tobacco. FUNCTIONAL PLANT BIOLOGY : FPB 2019; 46:885-895. [PMID: 31196377 DOI: 10.1071/fp18316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 05/22/2019] [Indexed: 05/20/2023]
Abstract
Plant annexins are proteins with multiple functions and roles in plant development and responses to abiotic stresses. We report here the functional analysis of the TdAnn12 annexin protein isolated from Triticum durum Desf. We have previously shown that TdAnn12 expression is highly induced by different abiotic stresses. In the present study, to investigate the physiological and biochemical stress-induced responses, we overexpressed TdAnn12 in tobacco. We demonstrate that transgenic tobacco plants expressing TdAnn12 exhibited enhanced tolerance to salt, osmotic stress and H2O2 at the seedling stage. Under greenhouse conditions, these plants showed tolerance to drought and salt stresses. Moreover, scavenging reactive oxygen species (ROS), higher chlorophyll content, lower lipid peroxidation levels and increased antioxidant activities (peroxidase, catalase and superoxide dismutase) were observed. Finally, accumulation of TdAnn12 in tobacco positively affects the regulation of some stress-related genes (MnSOD, APX1, CAT1, P5CS, NHX1, SOS1 and DREB1A). TdAnn12 interacts directly or indirectly with stress-related genes that could stimulate an adaptive potential to gain tolerance which is not present in non-transgenic (NT) plants. Our results clearly show that overexpression of TdAnn12 in transgenic tobacco improves stress tolerance through the removal of ROS.
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Affiliation(s)
- Rania Ben Saad
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P. '1177' 3018, Sfax, Tunisia; and Corresponding author.
| | - Marwa Harbaoui
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P. '1177' 3018, Sfax, Tunisia
| | - Walid Ben Romdhane
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P. '1177' 3018, Sfax, Tunisia; and Plant Production Department, College of Food and Agricultural Sciences, King Saud University, PO Box 2460, 11451 Riyadh, Saudi Arabia
| | - Nabil Zouari
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P. '1177' 3018, Sfax, Tunisia
| | - Khong N Giang
- International Joint Laboratory (LMI-RICE2), National Key Laboratory of Plant Cell Biotechnology, Agricultural Genetics Institute (AGI), Vietnam Academy of Agriculture Sciences (VAAS), Km2 Pham Van Dong Road, Co Nhue, Tu Liem District, Hanoi 10000, Vietnam
| | - Anis Ben Hsouna
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P. '1177' 3018, Sfax, Tunisia; and Department of Life Sciences, Faculty of Sciences of Gafsa, Zarroug 2112, Gafsa, Tunisia
| | - Faical Brini
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax (CBS)/University of Sfax, B.P. '1177' 3018, Sfax, Tunisia
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187
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Identification of Genes Differentially Expressed in Response to Cold in Pisum sativum Using RNA Sequencing Analyses. PLANTS 2019; 8:plants8080288. [PMID: 31443248 PMCID: PMC6724123 DOI: 10.3390/plants8080288] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/30/2019] [Accepted: 08/09/2019] [Indexed: 12/11/2022]
Abstract
Low temperature stress affects growth and development in pea (Pisum sativum L.) and decreases yield. In this study, RNA sequencing time series analyses performed on lines, Champagne frost-tolerant and Térèse frost-sensitive, during a low temperature treatment versus a control condition, led us to identify 4981 differentially expressed genes. Thanks to our experimental design and statistical analyses, we were able to classify these genes into three sets. The first one was composed of 2487 genes that could be related to the constitutive differences between the two lines and were not regulated during cold treatment. The second gathered 1403 genes that could be related to the chilling response. The third set contained 1091 genes, including genes that could be related to freezing tolerance. The identification of differentially expressed genes related to cold, oxidative stress, and dehydration responses, including some transcription factors and kinases, confirmed the soundness of our analyses. In addition, we identified about one hundred genes, whose expression has not yet been linked to cold stress. Overall, our findings showed that both lines have different characteristics for their cold response (chilling response and/or freezing tolerance), as more than 90% of differentially expressed genes were specific to each of them.
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188
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Zhao MJ, Yin LJ, Ma J, Zheng JC, Wang YX, Lan JH, Fu JD, Chen M, Xu ZS, Ma YZ. The Roles of GmERF135 in Improving Salt Tolerance and Decreasing ABA Sensitivity in Soybean. FRONTIERS IN PLANT SCIENCE 2019; 10:940. [PMID: 31396249 PMCID: PMC6664033 DOI: 10.3389/fpls.2019.00940] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 07/04/2019] [Indexed: 05/24/2023]
Abstract
Abscisic acid (ABA) mediates various abiotic stress responses, and ethylene responsive factors (ERFs) play vital role in resisting stresses, but the interaction of these molecular mechanisms remains elusive. In this study, we identified an ABA-induced soybean ERF gene GmERF135 that was highly up-regulated by ethylene (ET), drought, salt, and low temperature treatments. Subcellular localization assay showed that the GmERF135 protein was targeted to the nucleus. Promoter cis-acting elements analysis suggested that numerous potential stress responsive cis-elements were distributed in the promoter region of GmERF135, including ABA-, light-, ET-, gibberellin (GA)-, and methyl jasmonate (MeJA)-responsive elements. Overexpression of GmERF135 in Arabidopsis enhanced tolerance to drought and salt conditions. In addition, GmERF135 promoted the growth of transgenic hairy roots under salt and exogenous ABA conditions. These results suggest that soybean GmERF135 may participate in both ABA and ET signaling pathways to regulate the responses to multiple stresses.
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Affiliation(s)
- Meng-Jie Zhao
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - Li-Juan Yin
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - Jian Ma
- Department of Agronomy, Jilin Agricultural University, Changchun, China
| | - Jia-Cheng Zheng
- College of Agriculture, Anhui University of Science and Technology, Fengyang County, China
| | - Yan-Xia Wang
- Hebei Academy of Agriculture and Forestry Sciences, Research Center of Wheat Engineering Technology of Hebei, Shijiazhuang, China
| | - Jin-Hao Lan
- College of Agronomy and Plant Protection, Qingdao Agricultural University, Qingdao, China
| | - Jin-Dong Fu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - Ming Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - Zhao-Shi Xu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
- Department of Agronomy, Jilin Agricultural University, Changchun, China
- College of Agriculture, Anhui University of Science and Technology, Fengyang County, China
| | - You-Zhi Ma
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
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189
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Gu H, Yang Y, Xing M, Yue C, Wei F, Zhang Y, Zhao W, Huang J. Physiological and transcriptome analyses of Opisthopappus taihangensis in response to drought stress. Cell Biosci 2019; 9:56. [PMID: 31312427 PMCID: PMC6611040 DOI: 10.1186/s13578-019-0318-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/25/2019] [Indexed: 11/15/2022] Open
Abstract
Background Water scarcity is considered to be a severe environmental constraint to plant survival and productivity. Studies on drought-tolerant plants would definitely promote a better understanding of the regulatory mechanism lying behind the adaptive response of plants to drought. Opisthopappus taihangensis (ling) shih is a typical drought-tolerant perennial plant species endemically distributed across the Taihang Mountains in China, but the underlying mechanism for drought tolerance of this particular species remains elusive. Results To mimic natural drought stress, O. taihangensis plants were treated with two different concentrations (25% and 5%) of polyethylene glycol (PEG6000), which represent the H group (high salinity) and the L group (low salinity), respectively. The physiological characteristics of these two groups of plants, including relative water content maintenance (RWC), proline content and chlorophyll content were assessed and compared with plants in the control group (CK), which had normal irrigation. There was not a significant difference in RWC when comparing plants in the L group with the control group. Proline was accumulated to a higher level, and chlorophyll content was decreased slightly in plants under low drought stress. In plants from the H group, a lower RWC was observed. Proline was accumulated to an even higher level when compared with plants from the L group, and chlorophyll content was further reduced in plants under high drought stress. Transcriptomic analysis was carried out to look for genes that are differentially expressed (DEGs) in O. taihangensis plants coping adaptively with the two levels of drought stress. A total of 23,056 genes are differentially expressed between CK and L, among which 12,180 genes are up-regulated and 10,876 genes are down-regulated. Between H and L, 6182 genes are up-regulated and 1850 genes are down-regulated, which gives a total of 8032 genes. The highest number of genes, that are differentially expressed, was obtained when a comparison was made between CK and H. A total of 43,074 genes were found to be differentially expressed with 26,977 genes up-regulated and 16,097 genes down-regulated. Further analysis of these genes suggests that many of the up-regulated genes are enriched in pathways involved in amino acid metabolism. Besides, 39 transcription factors (TFs) were found to be continuously up-regulated with the increase of drought stress level. Conclusion Taken together, the results indicate that O. taihangensis plants are able to live adaptively under drought stress by responding physiologically and regulating the expression of a substantial number of drought-responsive genes and TFs to avoid adverse effects. Electronic supplementary material The online version of this article (10.1186/s13578-019-0318-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Huihui Gu
- 1School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China.,2School of Life Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Yan Yang
- 2School of Life Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China.,3School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Minghui Xing
- 2School of Life Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Caipeng Yue
- 3School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Fang Wei
- 3School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Yanjie Zhang
- 3School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Wenen Zhao
- 1School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
| | - Jinyong Huang
- 3School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan 450001 People's Republic of China
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190
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Regni L, Del Pino AM, Mousavi S, Palmerini CA, Baldoni L, Mariotti R, Mairech H, Gardi T, D’Amato R, Proietti P. Behavior of Four Olive Cultivars During Salt Stress. FRONTIERS IN PLANT SCIENCE 2019; 10:867. [PMID: 31333704 PMCID: PMC6624443 DOI: 10.3389/fpls.2019.00867] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 06/18/2019] [Indexed: 05/28/2023]
Abstract
Olive is considered as a moderately salt tolerant plant, however, tolerance to salt appears to be cultivar-dependent and genotypic responses have not been extensively investigated. In this work, saline stress was induced in four olive cultivars: Arbequina, Koroneiki, Royal de Cazorla and Fadak 86. The plants were grown in 2.5 l pots containing 60% peat and 40% of pumice mixture for 240 days and were irrigated three times a week with half-strength Hoagland solution containing 0, 100 and 200 mM NaCl. The effects of salt stress on growth, physiological and biochemical parameters were determined after 180, 210, and 240 days of treatment. Saline stress response was evaluated in leaves by measuring the activity of GSH and CAT enzymatic activity, as well as proline levels, gas exchanges, leaves relative water content and chlorophyll content, and proline content. All the studied cultivars showed a decrease in Net Photosynthesis, leaves chlorophyll content and plant growth (mainly leaves dry weight) and an increase in the activity of GSH and CAT. In addition, the reduction of proline content in leaf tissues, induced an alteration of osmotic regulation. Among the studied cultivars Royal and Koroneiki better counteracting the effects of saline stress thanks to a higher activity of two antioxidant enzymes.
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Affiliation(s)
- Luca Regni
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - Alberto Marco Del Pino
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - Soraya Mousavi
- Institute of Biosciences and Bioresources, National Research Council, Perugia, Italy
| | - Carlo Alberto Palmerini
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - Luciana Baldoni
- Institute of Biosciences and Bioresources, National Research Council, Perugia, Italy
| | - Roberto Mariotti
- Institute of Biosciences and Bioresources, National Research Council, Perugia, Italy
| | - Hanene Mairech
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - Tiziano Gardi
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - Roberto D’Amato
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
| | - Primo Proietti
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy
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191
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Yang Z, Sheng J, Lv K, Ren L, Zhang D. Y 2SK 2 and SK 3 type dehydrins from Agapanthus praecox can improve plant stress tolerance and act as multifunctional protectants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 284:143-160. [PMID: 31084867 DOI: 10.1016/j.plantsci.2019.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/14/2019] [Accepted: 03/16/2019] [Indexed: 05/25/2023]
Abstract
Two dehydrins from Agapanthus praecox (ApY2SK2 and ApSK3) show important protective effects under complex stresses. Both ApY2SK2 and ApSK3 contain one intron and consist of a full-length cDNA of 981 bp and 1057 bp encoding 186 and 215 amino acids, respectively. ApY2SK2 and ApSK3 transgenic Arabidopsis thaliana show reduced plasma membrane damage and ROS levels and higher antioxidant activity and photosynthesis capability under salt, osmotic, cold and drought stresses compared with the wild-type. ApY2SK2 and ApSK3 are mainly located in the cytoplasm and cell membrane, and ApY2SK2 can even localize in the nucleus. In vitro tests indicate that ApY2SK2 and ApSK3 can effectively protect enzyme activity during the freeze-thaw process, and ApY2SK2 also exhibits this function during desiccation treatment. Furthermore, ApY2SK2 and ApSK3 can significantly inhibit hydroxyl radical generation. These two dehydrins can bind metal ions with a binding affinity of Co2+> Ni2+> Cu2+> Fe3+; the binding affinity of ApSK3 is higher than that of ApY2SK2. Thus, ApY2SK2 has a better protective effect on enzyme activity, and ApSK3 has stronger metal ion binding function and effect on ROS metabolism. Moreover, plant cryopreservation evaluation tests indicate that ApY2SK2 and ApSK3 transformation can enhance the seedling survival ratio from 23% to 47% and 55%, respectively; the addition of recombinant ApY2SK2 and ApSK3 to plant vitrification solution may increase the survival ratio of wild-type A. thaliana seedlings from 24% to 50% and 46%, respectively. These findings suggest that ApY2SK2 and ApSK3 can effectively improve cell stress tolerance and have great potential for in vivo or in vitro applications.
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Affiliation(s)
- Zhou Yang
- Department of Landscape Science and Engineering, School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiangyuan Sheng
- Department of Landscape Science and Engineering, School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ke Lv
- Department of Landscape Science and Engineering, School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Li Ren
- Department of Landscape Science and Engineering, School of Design, Shanghai Jiao Tong University, Shanghai 200240, China; Institute for Agri-Food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Di Zhang
- Department of Landscape Science and Engineering, School of Design, Shanghai Jiao Tong University, Shanghai 200240, China.
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192
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Li X, Zhang Q, Yang X, Han J, Zhu Z. OsANN3, a calcium-dependent lipid binding annexin is a positive regulator of ABA-dependent stress tolerance in rice. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 284:212-220. [PMID: 31084874 DOI: 10.1016/j.plantsci.2019.04.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 04/02/2019] [Accepted: 04/23/2019] [Indexed: 05/20/2023]
Abstract
Annexin is a multigene family that plays critical roles in plant stress responses and various cellular processes. Here, we reported the cloning and functional characterization of a novel rice annexin protein, OsANN3. We found that expression of OsANN3 was induced by polyethylene glycol (PEG) and abscisic acid (ABA) treatments. Overexpression of OsANN3 in rice significantly increased survival rates under drought stress, while knocking down OsANN3 resulted in sensitivity to drought. Meanwhile, OsANN3 overexpression showed enhanced sensitivity to exogenous ABA. Together with its Ca2+ and phospholipid binding activity, we proposed that when plants were subjected to drought stress, OsANN3 might mediate Ca2+ influx by binding to phospholipid to activate ABA signaling pathways. In addition, overexpression OsANN3 showed better growth under drought stress comparing to wild type, such as longer root length and more stomata closure for reducing water loss by regulating ABA-dependent stress response pathways.
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Affiliation(s)
- Xuefei Li
- Hebei Key Laboratory of Molecular and Cellular Biology, Key Laboratory of Molecular and Cellular Biology of the Ministry of Education, College of Life Science, Hebei Normal University, Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, Hebei, 050024, China
| | - Qian Zhang
- Hebei Key Laboratory of Molecular and Cellular Biology, Key Laboratory of Molecular and Cellular Biology of the Ministry of Education, College of Life Science, Hebei Normal University, Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, Hebei, 050024, China
| | - Xue Yang
- Hebei Key Laboratory of Molecular and Cellular Biology, Key Laboratory of Molecular and Cellular Biology of the Ministry of Education, College of Life Science, Hebei Normal University, Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, Hebei, 050024, China
| | - Jianbo Han
- Hebei Key Laboratory of Molecular and Cellular Biology, Key Laboratory of Molecular and Cellular Biology of the Ministry of Education, College of Life Science, Hebei Normal University, Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, Hebei, 050024, China
| | - Zhengge Zhu
- Hebei Key Laboratory of Molecular and Cellular Biology, Key Laboratory of Molecular and Cellular Biology of the Ministry of Education, College of Life Science, Hebei Normal University, Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, Hebei, 050024, China.
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193
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A MYB-Related Transcription Factor from Lilium lancifolium L. (LlMYB3) Is Involved in Anthocyanin Biosynthesis Pathway and Enhances Multiple Abiotic Stress Tolerance in Arabidopsis thaliana. Int J Mol Sci 2019; 20:ijms20133195. [PMID: 31261872 PMCID: PMC6651583 DOI: 10.3390/ijms20133195] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/27/2019] [Accepted: 06/27/2019] [Indexed: 12/24/2022] Open
Abstract
Most commercial cultivars of lily are sensitive to abiotic stresses. However, tiger lily (Lilium lancifolium L.), one of the most widely distributed wild lilies in Asia, has strong abiotic stresses resistance. Thus, it is indispensable to identify stress-responsive candidate genes in tiger lily for the stress resistance improvement of plants. In this study, a MYB related homolog (LlMYB3) from tiger lily was functionally characterized as a positive regulator in plant stress tolerance. LlMYB3 is a nuclear protein with transcriptional activation activity at C-terminus. The expression of LlMYB3 gene was induced by multiple stress treatments. Several stress-related cis-acting regulatory elements (MYBRS, MYCRS, LTRE and DRE/CRT) were located within the promoter of LlMYB3; however, the promoter activity was not induced sufficiently by various stresses treatments. Overexpressing LlMYB3 in Arabidopsis thaliana L. transgenic plants showed ABA hypersensitivity and enhanced tolerance to cold, drought, and salt stresses. Furthermore, we found LlMYB3 highly co-expressed with LlCHS2 gene under cold treatment; yeast one-hybrid (Y1H) assays demonstrated LlMYB3 was able to bind to the promoter of LlCHS2. These findings suggest that the stress-responsive LlMYB3 may be involved in anthocyanin biosynthesis pathway to regulate stress tolerance of tiger lily.
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194
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Transcriptome analysis provides insights into the stress response crosstalk in apple (Malus × domestica) subjected to drought, cold and high salinity. Sci Rep 2019; 9:9071. [PMID: 31227734 PMCID: PMC6588687 DOI: 10.1038/s41598-019-45266-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 06/04/2019] [Indexed: 02/06/2023] Open
Abstract
Drought, cold, and high salinity are three major abiotic stresses effecting apple tree growth and fruit production. Understanding the genetic mechanisms of crosstalk between stress responses signalling networks and identifying the genes involved in apple has potential importance for crop improvement and breeding strategies. Here, the transcriptome profiling analysis of in vitro-grown apple plants subjected to drought, cold and high salinity stress, showed a total of 377 upregulated and 211 downregulated common differentially expressed genes (DEGs) to all 3 stress treatments compared with the control. Gene Ontology (GO) analysis indicated that these common DEGs were enriched in ‘metabolic process’ under the ‘biological process’ category, as well as in ‘binding’ and ‘catalytic activity’ under the ‘molecular function’ category. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis showed that common DEGs were mainly belong to the ‘biological functions’ category and 17 DEGs were identified in ‘environmental information processing’ sub-category which may act as signal transduction components in response crosstalk regulation. Overexpression of 5 upregulated genes individually, out of these 17 common DEGs in apple calli promoted the consistent upregulation of DREB6, CBF1 and ZAT10 and increased the mass weight and antioxidase ability, implying these five common DEGs involved in multiple pathways and improved comprehensive resistance to stress.
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195
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Sun D, Zhu Y, Xu H, He Y, Cen H. Time-Series Chlorophyll Fluorescence Imaging Reveals Dynamic Photosynthetic Fingerprints of sos Mutants to Drought Stress. SENSORS 2019; 19:s19122649. [PMID: 31212744 PMCID: PMC6631407 DOI: 10.3390/s19122649] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/03/2019] [Accepted: 06/10/2019] [Indexed: 01/16/2023]
Abstract
Resistance to drought stress is one of the most favorable traits in breeding programs yet drought stress is one of the most poorly addressed biological processes for both phenomics and genetics. In this study, we investigated the potential of using a time-series chlorophyll fluorescence (ChlF) analysis to dissect the ChlF fingerprints of salt overly sensitive (SOS) mutants under drought stress. Principle component analysis (PCA) was used to identify a shifting pattern of different genotypes including sos mutants and wild type (WT) Col-0. A time-series deep-learning algorithm, sparse auto encoders (SAEs) neural network, was applied to extract time-series ChlF features which were used in four classification models including linear discriminant analysis (LDA), k-nearest neighbor classifier (KNN), Gaussian naive Bayes (NB) and support vector machine (SVM). The results showed that the discrimination accuracy of sos mutants SOS1-1, SOS2-3, and wild type Col-0 reached 95% with LDA classification model. Sequential forward selection (SFS) algorithm was used to obtain ChlF fingerprints of the shifting pattern, which could address the response of sos mutants and Col-0 to drought stress over time. Parameters including QY, NPQ and Fm, etc. were significantly different between sos mutants and WT. This research proved the potential of ChlF imaging for gene function analysis and the study of drought stress using ChlF in a time-series manner.
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Affiliation(s)
- Dawei Sun
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
- Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China.
| | - Yueming Zhu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
- Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China.
| | - Haixia Xu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
- Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China.
| | - Yong He
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
- Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China.
- State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China.
| | - Haiyan Cen
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
- Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture and Rural Affairs, Hangzhou 310058, China.
- State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China.
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196
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de Freitas GM, Thomas J, Liyanage R, Lay JO, Basu S, Ramegowda V, do Amaral MN, Benitez LC, Bolacel Braga EJ, Pereira A. Cold tolerance response mechanisms revealed through comparative analysis of gene and protein expression in multiple rice genotypes. PLoS One 2019; 14:e0218019. [PMID: 31181089 PMCID: PMC6557504 DOI: 10.1371/journal.pone.0218019] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 05/24/2019] [Indexed: 11/25/2022] Open
Abstract
Due to its tropical origin and adaptation, rice is significantly impacted by cold stress, and consequently sustains large losses in growth and productivity. Currently, rice is the second most consumed cereal in the world and production losses caused by extreme temperature events in the context of "major climatic changes" can have major impacts on the world economy. We report here an analysis of rice genotypes in response to low-temperature stress, studied through physiological gas-exchange parameters, biochemical changes in photosynthetic pigments and antioxidants, and at the level of gene and protein expression, towards an understanding and identification of multiple low-temperature tolerance mechanisms. The first effects of cold stress were observed on photosynthesis among all genotypes. However, the tropical japonica genotypes Secano do Brazil and Cypress had a greater reduction in gas exchange parameters like photosynthesis and water use efficiency in comparison to the temperate japonica Nipponbare and M202 genotypes. The analysis of biochemical profiles showed that despite the impacts of low temperature on tolerant plants, they quickly adjusted to maintain their cellular homeostasis by an accumulation of antioxidants and osmolytes like phenolic compounds and proline. The cold tolerant and sensitive genotypes showed a clear difference in gene expression at the transcript level for OsGH3-2, OsSRO1a, OsZFP245, and OsTPP1, as well as for expression at the protein level for LRR-RLKs, bHLH, GLYI, and LTP1 proteins. This study exemplifies the cold tolerant features of the temperate japonica Nipponbare and M202 genotypes, as observed through the analysis of physiological and biochemical responses and the associated changes in gene and protein expression patterns. The genes and proteins showing differential expression response are notable candidates towards understanding the biological pathways affected in rice and for engineering cold tolerance, to generate cultivars capable of maintaining growth, development, and reproduction under cold stress. We also propose that the mechanisms of action of the genes analyzed are associated with the tolerance response.
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Affiliation(s)
- Gabriela Moraes de Freitas
- Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, United States of America
- Department of Botany, Federal University of Pelotas, Pelotas, Brazil
| | - Julie Thomas
- Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Rohana Liyanage
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Jackson O. Lay
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Supratim Basu
- Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Venkategowda Ramegowda
- Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, United States of America
| | | | | | | | - Andy Pereira
- Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, United States of America
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197
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Singh AK, Chamovitz DA. Role of Cop9 Signalosome Subunits in the Environmental and Hormonal Balance of Plant. Biomolecules 2019; 9:E224. [PMID: 31181827 PMCID: PMC6628103 DOI: 10.3390/biom9060224] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 06/06/2019] [Accepted: 06/08/2019] [Indexed: 11/17/2022] Open
Abstract
The COP9 (Constitutive photomorphogenesis 9) signalosome (CSN) is a highly conserved protein complex that influences several signaling and developmental processes. The COP9 signalosome consists of eight subunits, among which two subunits, CSN5 and CSN6, contain an Mpr1/Pad1 N-terminal (MPN) domain and the remaining six subunits contain a proteasome, COP9 signalosome, and initiation factor 3 (PCI) domain. In plants, each MPN subunit is encoded by two genes, which is not the case in other organisms. This review aims to provide in-depth knowledge of each COP9 signalosome subunit, concentrating on genetic analysis of both partial and complete loss-of-function mutants. At the beginning of this review, the role of COP9 signalosome in the hormonal signaling and defense is discussed, whereas later sections deal in detail with the available partial loss-of-function, hypomorphic mutants of each subunit. All available hypomorphic mutants are compared based on their growth response and deneddylation activity.
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Affiliation(s)
- Amit Kumar Singh
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv 6997801, Israel.
- Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 8499000, Israel.
| | - Daniel A Chamovitz
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv 6997801, Israel.
- Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 8499000, Israel.
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198
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Zhou DR, Eid R, Miller KA, Boucher E, Mandato CA, Greenwood MT. Intracellular second messengers mediate stress inducible hormesis and Programmed Cell Death: A review. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:773-792. [DOI: 10.1016/j.bbamcr.2019.01.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/25/2019] [Accepted: 01/29/2019] [Indexed: 12/11/2022]
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199
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Neji M, Gorel A, Ojeda DI, Duminil J, Kastally C, Steppe K, Fayolle A, Hardy OJ. Comparative analysis of two sister Erythrophleum species (Leguminosae) reveal contrasting transcriptome-wide responses to early drought stress. Gene 2019; 694:50-62. [PMID: 30716444 DOI: 10.1016/j.gene.2019.01.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 12/11/2018] [Accepted: 01/22/2019] [Indexed: 02/01/2023]
Abstract
With the ongoing climate change, African rainforests are expected to experience severe drought events in the future. In Africa, the tropical genus Erythrophleum (Fabaceae) includes two forest sister timber tree species displaying contrasting geographical distributions. Erythrophleum ivorense is adapted to wet evergreen Guineo-Congolian forests, whereas E. suaveolens occurs in a wider range of climates, being found in moist dense forests but also in gallery forests under a relatively drier climate. This geographical distribution pattern suggests that the two species might cope differently to drought at the genomic level. Yet, the genetic basis of tolerance response to drought stress in both species is still uncharacterized. To bridge this gap, we performed an RNA-seq approach on seedlings from each species to monitor their transcriptional responses at different levels of drought stress (0, 2 and 6 weeks after stopping watering seedlings). Monitoring of wilting symptoms revealed that E. suaveolens displayed an earlier phenotypic response to drought stress than E. ivorense. At the transcriptomic level, results revealed 2020 (1204 down-regulated/816 up-regulated) and 1495 differentially expressed genes (DEGs) in response to drought stress from a total of 67,432 and 66,605 contigs assembled in E. ivorense and E. suaveolens, respectively. After identifying 30,374 orthologs between species, we found that only 7 of them were DEGs shared between species, while 587 and 458 were differentially expressed only in E. ivorense or E. suaveolens, respectively. GO and KEGG enrichment analysis revealed that the two species differ in terms of significantly regulated pathways as well as the number and expression profile of DEGs (Up/Down) associated with each pathway in the two stress stages. Our results suggested that the two studied species react differently to drought. E. suaveolens seems displaying a prompt response to drought at its early stage strengthened by the down-regulation of many DEGs encoding for signaling and metabolism-related pathways. A considerable up-regulation of these pathways was also found in E. ivorense at the late stage of drought, suggesting this species may be a late responder. Overall, our data may serve as basis for further understanding the genetic control of drought tolerance in tropical trees and favor the selection of crucial genes for genetically enhancing drought resistance.
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Affiliation(s)
- Mohamed Neji
- Unit of Evolutionary Biology & Ecology, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt, 50, CP 160/12, B-1050 Brussels, Belgium; Department of Life Sciences, Faculty of Sciences of Gabès, University of Gabès, Tunisia; Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, Hammam-Lif, Tunisia.
| | - Anais Gorel
- Department Biosystem Engineering (BIOSE), Gembloux Agro-Bio Tech, University of Liege, Belgium
| | - Dario I Ojeda
- Unit of Evolutionary Biology & Ecology, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt, 50, CP 160/12, B-1050 Brussels, Belgium; Unit of Ecology and Genetics, Department of Biology, Oulu University, Finland; Norwegian Institute of Bioeconomy Research, Ås, Norway
| | - Jérôme Duminil
- Unit of Evolutionary Biology & Ecology, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt, 50, CP 160/12, B-1050 Brussels, Belgium; UMR-DIADE, Institut de Recherche pour le Développement, Univ. Montpellier, Montpellier, France
| | - Chedly Kastally
- Unit of Evolutionary Biology & Ecology, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt, 50, CP 160/12, B-1050 Brussels, Belgium
| | - Kathy Steppe
- Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
| | - Adeline Fayolle
- Department Biosystem Engineering (BIOSE), Gembloux Agro-Bio Tech, University of Liege, Belgium
| | - Olivier J Hardy
- Unit of Evolutionary Biology & Ecology, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt, 50, CP 160/12, B-1050 Brussels, Belgium
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200
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Identification and functional prediction of cold-related long non-coding RNA (lncRNA) in grapevine. Sci Rep 2019; 9:6638. [PMID: 31036931 PMCID: PMC6488645 DOI: 10.1038/s41598-019-43269-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 04/18/2019] [Indexed: 11/09/2022] Open
Abstract
Plant long non-coding RNA (lncRNA) undergoes dynamic regulation and acts in developmental and stress regulation. In this study, we surveyed the expression dynamics of lncRNAs in grapevine (Vitis vinifera L.) under cold stress using high-throughput sequencing. Two-hundred and three known lncRNAs were significantly up-regulated and 144 known lncRNAs were significantly down-regulated in cold-treated grapevine. In addition, 2 088 novel lncRNA transcripts were identified in this study, with 284 novel lncRNAs significantly up-regulated and 182 novel lncRNAs significantly down-regulated in cold-treated grapevine. Two-hundred and forty-two differentially expressed grapevine lncRNAs were predicted to target 326 protein-coding genes in a cis-regulatory relationship. Many differentially expressed grapevine lncRNAs targeted stress response-related genes, such as CBF4 transcription factor genes, late embryogenesis abundant protein genes, peroxisome biogenesis protein genes, and WRKY transcription factor genes. Sixty-two differentially expressed grapevine lncRNAs were predicted to target 100 protein-coding genes in a trans-regulatory relationship. The expression of overall target genes in both cis and trans-regulatory relationships were positively related to the expression of lncRNAs in grapevines under cold stress. We identified 31 known lncRNAs as 34 grapevine micro RNA (miRNA) precursors and some miRNAs may be derived from multiple lncRNAs. We found 212 lncRNAs acting as targets of miRNAs in grapevines, involving 150 miRNAs; additionally, 120 grapevine genes were predicted as targets of grapevine miRNAs and lncRNAs. We found one gene cluster that was up-regulated and showed the same expression trend. In this cluster, many genes may be involved in abiotic stress response such as WRKY, Hsf, and NAC transcription factor genes.
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