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Zhao J, Bo K, Pan Y, Li Y, Yu D, Li C, Chang J, Wu S, Wang Z, Zhang X, Gu X, Weng Y. Phytochrome-interacting factor PIF3 integrates phytochrome B and UV-B signaling pathways to regulate gibberellin- and auxin-dependent growth in cucumber hypocotyls. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:4520-4539. [PMID: 37201922 DOI: 10.1093/jxb/erad181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 05/11/2023] [Indexed: 05/20/2023]
Abstract
In Arabidopsis, the photoreceptors phytochrome B (PhyB) and UV-B resistance 8 (UVR8) mediate light responses that play a major role in regulating photomorphogenic hypocotyl growth, but how they crosstalk to coordinate this process is not well understood. Here we report map-based cloning and functional characterization of an ultraviolet (UV)-B-insensitive, long-hypocotyl mutant, lh1, and a wild-type-like mutant, lh2, in cucumber (Cucumis sativus), which show defective CsPhyB and GA oxidase2 (CsGA20ox-2), a key gibberellic acid (GA) biosynthesis enzyme, respectively. The lh2 mutation was epistatic to lh1 and partly suppressed the long-hypocotyl phenotype in the lh1lh2 double mutant. We identified phytochrome interacting factor (PIF) CsPIF3 as playing a critical role in integrating the red/far-red and UV-B light responses for hypocotyl growth. We show that two modules, CsPhyB-CsPIF3-CsGA20ox-2-DELLA and CsPIF3-auxin response factor 18 (CsARF18), mediate CsPhyB-regulated hypocotyl elongation through GA and auxin pathways, respectively, in which CsPIF3 binds to the G/E-box motifs in the promoters of CsGA20ox-2 and CsARF18 to regulate their expression. We also identified a new physical interaction between CsPIF3 and CsUVR8 mediating CsPhyB-dependent, UV-B-induced hypocotyl growth inhibition. Our work suggests that hypocotyl growth in cucumber involves a complex interplay of multiple photoreceptor- and phytohormone-mediated signaling pathways that show both conservation with and divergence from those in Arabidopsis.
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Affiliation(s)
- Jianyu Zhao
- Horticulture Department, University of Wisconsin, Madison WI 53706, USA
| | - Kailiang Bo
- Horticulture Department, University of Wisconsin, Madison WI 53706, USA
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yupeng Pan
- Horticulture Department, University of Wisconsin, Madison WI 53706, USA
- College of Horticulture, Northwest A& F University, Yangling 712100, China
| | - Yuhong Li
- College of Horticulture, Northwest A& F University, Yangling 712100, China
| | - Daoliang Yu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chuang Li
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jiang Chang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shuang Wu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhongyi Wang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xiaolan Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xingfang Gu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yiqun Weng
- Horticulture Department, University of Wisconsin, Madison WI 53706, USA
- USDA-ARS Vegetable Crops Research Unit, Madison, WI 53705, USA
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Santin M, Zeni V, Grassi A, Ricciardi R, Pieracci Y, Di Giovanni F, Panzani S, Frasconi C, Agnolucci M, Avio L, Turrini A, Giovannetti M, Ruffini Castiglione M, Ranieri A, Canale A, Lucchi A, Agathokleous E, Benelli G. Do changes in Lactuca sativa metabolic performance, induced by mycorrhizal symbionts and leaf UV-B irradiation, play a role towards tolerance to a polyphagous insect pest? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:56207-56223. [PMID: 36917375 PMCID: PMC10121541 DOI: 10.1007/s11356-023-26218-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
The increased ultraviolet radiation (UV) due to the altered stratospheric ozone leads to multiple plant physiological and biochemical adaptations, likely affecting their interaction with other organisms, such as pests and pathogens. Arbuscular mycorrhizal fungi (AMF) and UV-B treatment can be used as eco-friendly techniques to protect crops from pests by activating plant mechanisms of resistance. In this study, we investigated plant (Lactuca sativa) response to UV-B exposure and Funneliformis mosseae (IMA1) inoculation as well as the role of a major insect pest, Spodoptera littoralis. Lettuce plants exposed to UV-B were heavier and taller than non-irradiated ones. A considerable enrichment in phenolic, flavonoid, anthocyanin, and carotenoid contents and antioxidant capacity, along with redder and more homogenous leaf color, were also observed in UV-B-treated but not in AMF-inoculated plants. Biometric and biochemical data did not differ between AMF and non-AMF plants. AMF-inoculated plants showed hyphae, arbuscules, vesicles, and spores in their roots. AMF colonization levels were not affected by UV-B irradiation. No changes in S. littoralis-feeding behavior towards treated and untreated plants were observed, suggesting the ability of this generalist herbivore to overcome the plant chemical defenses boosted by UV-B exposure. The results of this multi-factorial study shed light on how polyphagous insect pests can cope with multiple plant physiological and biochemical adaptations following biotic and abiotic preconditioning.
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Affiliation(s)
- Marco Santin
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Valeria Zeni
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Arianna Grassi
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Renato Ricciardi
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Ylenia Pieracci
- Department of Pharmacy, University of Pisa, Via Bonanno 6, 56126, Pisa, Italy
| | - Filippo Di Giovanni
- Department of Life Sciences, University of Siena, Via Aldo Moro 2, Siena, Italy
| | - Sofia Panzani
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Christian Frasconi
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Monica Agnolucci
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Luciano Avio
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Alessandra Turrini
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Manuela Giovannetti
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Monica Ruffini Castiglione
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
- Department of Biology, University of Pisa, Via L. Ghini 13, 56126, Pisa, Italy
| | - Annamaria Ranieri
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Angelo Canale
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Andrea Lucchi
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, 56124, Pisa, Italy
| | - Evgenios Agathokleous
- Department of Ecology, School of Applied Meteorology, Science & Technology (NUIST), Nanjing University of Information, Nanjing, 210044, China
| | - Giovanni Benelli
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy.
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Yu L, Ding Y, Zhou M. A long non-coding RNA PelncRNA1 is involved in Phyllostachys edulis response to UV-B stress. PeerJ 2023; 11:e15243. [PMID: 37187514 PMCID: PMC10178214 DOI: 10.7717/peerj.15243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/28/2023] [Indexed: 05/17/2023] Open
Abstract
Phyllostachys edulis (moso bamboo) is China's most widespread bamboo species, with significant economic and ecological values. Long non-coding RNA (lncRNA) is a type of regulatory RNA that is longer than 200 nucleotides and incapable of encoding proteins, and is frequently involved in regulating biotic and abiotic stress and plant development. However, the biological functions of lncRNA in moso bamboo are unknown. In this study, a lncRNA (named PelncRNA1) differentially expressed following UV-B treatment was discovered in the whole transcriptome sequencing database of moso bamboo. The target genes were filtered and defined by correlation analysis of PelncRNA1 and gene expression pattern. The expression levels of PelncRNA1 and its target genes were verified using qRT-PCR. The results demonstrated that the expression levels of PelncRNA1 and its target genes increased during UV-B treatment. In Arabidopsis transgenic seedlings and moso bamboo protoplasts, PelncRNA1 was discovered to influence the expression of its target genes when overexpressed. In addition, transgenic Arabidopsis showed higher tolerance to UV-B stress. These results suggest that PelncRNA1 and its target genes are involved in the response of moso bamboo to UV-B stress. The novel findings would contribute to our understanding of how lncRNAs regulate the response to abiotic stresses in moso bamboo.
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Ding Y, Zou LH, Wu J, Ramakrishnan M, Gao Y, Zhao L, Zhou M. The pattern of DNA methylation alteration, and its association with the expression changes of non-coding RNAs and mRNAs in Moso bamboo under abiotic stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 325:111451. [PMID: 36075278 DOI: 10.1016/j.plantsci.2022.111451] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 08/01/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
Epigenetic changes play an important role in plant growth and development and in stress response. However, DNA methylation pattern and its relationship with the expression changes of non-coding RNAs and mRNAs of Moso bamboo in response to abiotic stress is still largely unknown. In this work, we used whole-genome bisulfite sequencing in combination with whole-transcriptome sequencing to analyze the DNA methylation and transcription patterns of mRNAs and non-coding RNAs in Moso bamboo under abiotic stresses such as cold, heat, ultraviolet (UV) and salinity. We found that CHH methylation in the promoter region was positively correlated with gene expression, while CHG and CHH methylations in the gene body regions were negatively associated with gene expression. Moreover, CG and CHG methylations in the promoter regions were negatively correlated with the transcript abundance of long non-coding RNAs (lncRNAs), microRNAs (miRNAs) and circular RNAs (circRNAs). Similarly, the methylation levels of three contexts in the genic regions were negatively correlated with the transcript abundance of lncRNAs and miRNAs but positively correlated with that of circRNAs. In addition, we suggested that the reduction of 21-nt and 24-nt small interfering RNA (siRNA) expression tended to increase methylation levels in the genic regions. We found that stress-responsive genes such as CRPK1, HSFB2A and CIPK were differentially methylated and expressed. Our results also proposed that DNA methylation may regulate the expression of the transcription factors (TFs) and plant hormone signalling genes such as IAA9, MYC2 and ERF110 in response to abiotic stress. This study firstly reports the abiotic stress-responsive DNA methylation pattern and its involvement of expression of coding RNAs and non-coding RNAs in Moso bamboo. The results expand the knowledge of epigenetic mechanisms in Moso bamboo under abiotic stress and support in-depth deciphering of the function of specific non-coding RNAs in future studies.
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Affiliation(s)
- Yiqian Ding
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China
| | - Long-Hai Zou
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China.
| | - Jiajun Wu
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China
| | - Muthusamy Ramakrishnan
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China
| | - Yubang Gao
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China
| | - Liangzhen Zhao
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China; Basic Forestry and Proteomics Research Center, College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Mingbing Zhou
- The State Key Laboratory of Subtropical Silviculture; Institute of Bamboo, Zhejiang A&F University, Lin'an, Hangzhou 311300, China.
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Aux/IAA11 Is Required for UV-AB Tolerance and Auxin Sensing in Arabidopsis thaliana. Int J Mol Sci 2022; 23:ijms232113386. [PMID: 36362171 PMCID: PMC9655273 DOI: 10.3390/ijms232113386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022] Open
Abstract
In order to survive, plants have, over the course of their evolution, developed sophisticated acclimation and defense strategies governed by complex molecular and physiological, and cellular and extracellular, signaling pathways. They are also able to respond to various stimuli in the form of tropisms; for example, phototropism or gravitropism. All of these retrograde and anterograde signaling pathways are controlled and regulated by waves of reactive oxygen species (ROS), electrical signals, calcium, and hormones, e.g., auxins. Auxins are key phytohormones involved in the regulation of plant growth and development. Acclimation responses, which include programmed cell death induction, require precise auxin perception. However, our knowledge of these pathways is limited. The Aux/IAA family of transcriptional corepressors inhibits the growth of the plant under stress conditions, in order to maintain the balance between development and acclimation responses. In this work, we demonstrate the Aux/IAA11 involvement in auxin sensing, survival, and acclimation to UV-AB, and in carrying out photosynthesis under inhibitory conditions. The tested iaa11 mutants were more susceptible to UV-AB, photosynthetic electron transport (PET) inhibitor, and synthetic endogenous auxin. Among the tested conditions, Aux/IAA11 was not repressed by excess light stress, exclusively among its phylogenetic clade. Repression of transcription by Aux/IAA11 could be important for the inhibition of ROS formation or efficiency of ROS scavenging. We also hypothesize that the demonstrated differences in the subcellular localization of the two Aux/IAA11 protein variants might indicate their regulation by alternative splicing. Our results suggest that Aux/IAA11 plays a specific role in chloroplast retrograde signaling, since it is not repressed by high (excess) light stress, exclusively among its phylogenetic clade.
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Effects and Mechanism of Enhanced UV-B Radiation on the Flag Leaf Angle of Rice. Int J Mol Sci 2022; 23:ijms232112776. [PMID: 36361567 PMCID: PMC9654109 DOI: 10.3390/ijms232112776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 11/25/2022] Open
Abstract
Leaf angle is an influential agricultural trait that influences rice (Oryza sativa L.) plant type and yield, which results from the leaf bending from the vertical axis to the abaxial axis. UV-B radiation affects plant morphology, but the effects of varying UV-B intensities on rice flag leaves and the underlying molecular, cellular, and physiological mechanisms remain unknown. This experiment aims to examine the effect of natural light and field-enhanced UV-B radiation (2.5, 5.0, 7.5 kJ·m−2) on the leaf angle of the traditional rice variety Baijiaolaojing on Yuanyang terraces. In comparison with natural light, the content of brassinolide and gibberellin in rice flag leaves increased by 29.94% and 60.1%, respectively. The auxin content decreased by 17.3%. Compared with the natural light treatment, the cellulose content in the pulvini was reduced by 13.8% and hemicellulose content by 25.7% under 7.5 kJ·m−2 radiation intensity. The thick-walled cell area and vascular bundle area of the leaf pulvini decreased with increasing radiation intensity, and the growth of mechanical tissue in the rice leaf pulvini was inhibited. The flag leaf angle of rice was greatest at 7.5 kJ·m−2 radiation intensity, with an increase of 50.2%. There are two pathways by which the angle of rice flag leaves is controlled under high-intensity UV-B radiation. The leaf angle regulation genes OsBUL1, OsGSR1, and OsARF19 control hormone levels, whereas the ILA1 gene controls fiber levels. Therefore, as cellulose, hemicellulose, sclerenchyma, and vascular bundles weaken the mechanical support of the pulvini, the angle of the flag leaf increases.
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Sah SK, Jumaa S, Li J, Reddy KR. Proteomic analysis response of rice ( Oryza sativa) leaves to ultraviolet-B radiation stress. FRONTIERS IN PLANT SCIENCE 2022; 13:871331. [PMID: 36212327 PMCID: PMC9536139 DOI: 10.3389/fpls.2022.871331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 08/05/2022] [Indexed: 06/16/2023]
Abstract
Rice (Oryza sativa) is a human staple food and serves as a model organism for genetic and molecular studies. Few studies have been conducted to determine the effects of ultraviolet-B (UV-B) stress on rice. UV-B stress triggers morphological and physiological changes in plants. However, the underlying mechanisms governing these integrated responses are unknown. In this study, we conducted a proteomic response of rice leaves to UV-B stress using two-dimensional gel electrophoresis and identified the selected proteins by mass spectrometry analysis. Four levels of daily biologically effective UV-B radiation intensities were imposed to determine changes in protein accumulation in response to UV-B stress: 0 (control), 5, 10, and 15 kJ m-2 d-1in two cultivars, i.e., IR6 and REX. To mimic the natural environment, we conducted this experiment in Sunlit Soil-Plant-Atmosphere-Research (SPAR) chambers. Among the identified proteins, 11% of differentially expressed proteins were found in both cultivars. In the Rex cultivar, only 45% of proteins are differentially expressed, while only 27.5% were expressed in IR6. The results indicate that REX is more affected by UV-B stress than IR6 cultivars. The identified protein TSJT1 (spot 16) in both cultivars plays a crucial role in plant growth and development during stress treatment. Additionally, we found that UV-B stress altered many antioxidant enzymes associated with redox homeostasis and cell defense response. Another enzyme, the glyceraldehyde-3-phosphate dehydrogenase (GAPDH), has been identified as spot 15, which plays an essential role in glycolysis and cellular energy production. Another vital protein identified is glycosyl hydrolase (GH) as spot 9, which catalyzes the hydrolysis of glycosidic bonds in cell wall polymers and significantly affects cell wall architecture. Some identified proteins are related to photosynthesis, protein biosynthesis, signal transduction, and stress response. The findings of our study provide new insights into understanding how rice plants are tailored to UV-B stress via modulating the expression of UV-B responsive proteins, which will help develop superior rice breeds in the future to combat UV-B stress. Data are available via ProteomeXchange with identifier PXD032163.
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Affiliation(s)
- Saroj Kumar Sah
- Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS, United States
| | - Salah Jumaa
- Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS, United States
| | - Jiaxu Li
- Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS, United States
| | - K. Raja Reddy
- Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS, United States
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Dawood MFA, Abu-Elsaoud AM, Sofy MR, Mohamed HI, Soliman MH. Appraisal of kinetin spraying strategy to alleviate the harmful effects of UVC stress on tomato plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:52378-52398. [PMID: 35258726 PMCID: PMC9343307 DOI: 10.1007/s11356-022-19378-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 02/19/2022] [Indexed: 05/17/2023]
Abstract
Increasing ultraviolet (UV) radiation is causing oxidative stress that accounts for growth and yield losses in the present era of climate change. Plant hormones are useful tools for minimizing UV-induced oxidative stress in plants, but their putative roles in protecting tomato development under UVC remain unknown. Therefore, we investigated the underlying mechanism of pre-and post-kinetin (Kn) treatments on tomato plants under UVC stress. The best dose of Kn was screened in the preliminary experiments, and this dose was tested in further experiments. UVC significantly decreases growth traits, photosynthetic pigments, protein content, and primary metabolites (proteins, carbohydrates, amino acids) but increases oxidative stress biomarkers (lipid peroxidation, lipoxygenase activity, superoxide anion, hydroxyl radical, and hydrogen peroxide) and proline content. Treatment of pre-and post-kinetin spraying to tomato plants decreases UVC-induced oxidative stress by restoring the primary and secondary metabolites' (phenolic compounds, flavonoids, and anthocyanins) status and upregulating the antioxidant defense systems (non-enzymatic antioxidants as ascorbate, reduced glutathione, α-tocopherol as well as enzymatic antioxidants as superoxide dismutase, catalase, ascorbate peroxidase, glutathione peroxidase, glutathione-S-transferase, and phenylalanine ammonia-lyase). Thus, the application of Kn in optimum doses and through different modes can be used to alleviate UVC-induced negative impacts in tomato plants.
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Affiliation(s)
- Mona F A Dawood
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | | | - Mahmoud R Sofy
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt.
| | - Heba I Mohamed
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Roxy, P.C.11757, Heliopolis Cairo, Egypt
| | - Mona H Soliman
- Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
- Biology Department, Faculty of Science, Taibah University, Al-SharmYanbu El-Bahr, , Yanbu, 46429, Kingdom of Saudi Arabia
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Supplemental UV-B Exposure Influences the Biomass and the Content of Bioactive Compounds in Linum usitatissimum L. Sprouts and Microgreens. HORTICULTURAE 2022. [DOI: 10.3390/horticulturae8030213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The interest in the pre-harvest ultraviolet-B (UV-B) exposure of crops in indoor cultivation has grown consistently, though very little is known about its influence on the nutraceutical quality of microgreens. Flaxseeds constitute a valuable oilseed species, mostly appreciated for their nutritional properties and the presence of health-promoting compounds. Therefore, although scarcely studied, flaxseed sprouts and microgreens might constitute a high-quality food product to be included in a healthy diet. This study aims to unravel the effects of pre-harvest ultraviolet-B irradiation on the nutritional and nutraceutical quality of flaxseed sprouts and microgreens grown under artificial conditions. The UV-B irradiation decreased the biomass and stem length of microgreens. However, the content of total phenolics and flavonoids and the antioxidant capacity were strongly enhanced by the UV-B treatment in both sprouts and microgreens. Among photosynthetic pigments, chlorophyll a, violaxanthin, antheraxanthin, and lutein in sprouts were reduced by the treatment, while chlorophyll b increased in microgreens. In conclusion, our results showed that growing flaxseed sprouts and microgreens in controlled conditions with supplemental UV-B exposure might increase their nutritional and nutraceutical quality, as well as their antioxidant capacity, making them high-quality functional foods.
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Sheridan ML, Simonelli L, Giustozzi M, Casati P. Ultraviolet-B Radiation Represses Primary Root Elongation by Inhibiting Cell Proliferation in the Meristematic Zone of Arabidopsis Seedlings. FRONTIERS IN PLANT SCIENCE 2022; 13:829336. [PMID: 35401611 PMCID: PMC8988989 DOI: 10.3389/fpls.2022.829336] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 02/28/2022] [Indexed: 05/13/2023]
Abstract
In Arabidopsis thaliana plants, exposure to UV-B induces an inhibition of primary root elongation. Different mutants have been isolated that are deficient in this response; however, little is known about the cellular and molecular mechanisms that regulate inhibition of root elongation in seedlings exposed to UV-B. In this work, we investigated the effect UV-B irradiation of different organs on primary root elongation. Our results demonstrate that irradiation of the leaves and shoots only induce a partial inhibition of primary root elongation, while when only roots are exposed to this radiation, primary root inhibition is similar as that measured when the complete seedling is irradiated. The consequences of exposure at different root developmental stages and times after the end of the treatment was also studied. We here show that inhibition of primary root elongation is a consequence of a decrease in cell proliferation in the meristematic zone of the primary roots, while the elongation zone size is not affected by the treatment. The decrease in cell number after UV-B exposure is partially compensated by an increase in cell length in the root meristem; however, this compensation is not enough to maintain the meristem size. We also here demonstrate that, similarly as what occurs in developing leaves, GROWTH REGULATING FACTOR 3 (GRF3) transcription factor regulates cell proliferation in UV-B irradiated roots; however, and in contrast to what occurs in the leaves, this response does not depend on the presence of MITOGEN ACTIVATED PROTEIN KINASE 3 (MPK3). Inhibition of primary root elongation by UV-B under our experimental conditions is also independent of the UV-B photoreceptor UV RESISTANT LOCUS 8 (UVR8) or ATAXIA TELANGIECTASIA MUTATED (ATM); but a deficiency in ATM AND RAD3-RELATED (ATR) expression increases UV-B sensitivity in the roots. Finally, our data demonstrate that UV-B affects primary root growth in various Arabidopsis accessions, showing different sensitivities to this radiation.
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Dukowic-Schulze S, Harvey A, Garcia N, Chen C, Gardner G. UV-B Irradiation Results in Inhibition of Hypocotyl Elongation, Cell Cycle Arrest, and Decreased Endoreduplication Mediated by miR5642. Photochem Photobiol 2021; 98:1084-1099. [PMID: 34882800 DOI: 10.1111/php.13574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 12/06/2021] [Indexed: 01/11/2023]
Abstract
UV-B as a component of natural solar radiation can induce damage and morphological development in plants. The UV-B response from germination and early development in seedlings is still largely unknown, with most studies focused on older, light-exposed seedlings. We used fluence response curves measuring hypocotyl length after UV-B exposure coupled with RNA-seq and sRNA-seq evaluation of the early seedling response in the model organism Arabidopsis thaliana. We identified miR5642 as a potential novel key regulator of UV-B responses. miR5642 is a noncanonical miRNA predicted to target previously known and unknown components involved in hypocotyl growth inhibition. These include (i) SMAX1, a signal transmitter for seedling germination and growth; (ii) ZAT1, an uncharacterized transcription factor; and (iii) membrane pores and transporters (VHA-E1, VHA-E3, EPSIN-LIKE and PIP1.4) implicated in cell elongation. In addition, HY5 and HYH, two homologous and redundant transcription factors involved in seedling photomorphogenesis, may interact with these newly identified components. Interestingly, UV-B-induced DNA photodimer formation seems to be the direct trigger leading to inhibition of hypocotyl growth through a combination of cellular decisions including cell cycle arrest, reduced endoreduplication and reduced cell elongation, and this inhibition appears to be modulated by miR5642 target genes.
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Affiliation(s)
| | - Allison Harvey
- Department of Horticultural Science, University of Minnesota, St. Paul, MN
| | - Nelson Garcia
- Department of Horticultural Science, University of Minnesota, St. Paul, MN
| | - Changbin Chen
- Department of Horticultural Science, University of Minnesota, St. Paul, MN
| | - Gary Gardner
- Department of Horticultural Science, University of Minnesota, St. Paul, MN
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Shahzad R, Ewas M, Harlina PW, Khan SU, Zhenyuan P, Nie X, Nishawy E. β-Sitosterol differentially regulates key metabolites for growth improvement and stress tolerance in rice plants during prolonged UV-B stress. J Genet Eng Biotechnol 2021; 19:79. [PMID: 34052903 PMCID: PMC8164654 DOI: 10.1186/s43141-021-00183-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/17/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Elevated ultraviolet-B (UV-B) radiation is potentially deleterious to many organisms specifically crop plants and has become a global challenge. Rice is an exceptionally important staple food which is grown worldwide, and many efforts have been done recently to improve rice varieties against UV-B stress. This current study aims to investigate the effects of exogenous application of β-sitosterol (βSito) on growth improvement and tolerance level of rice plants against prolonged UV-B stress. The physiological and metabolic responses were evaluated in rice plants not supplemented with βSito (Nβ) and those supplemented with βSito (Sβ). RESULTS The Nβ and Sβ plants were grown under non-stress (ns) and under prolonged UV-B stress (uvs) conditions and termed as Nβns, Sβns and Nβuvs, Sβuvs, respectively. The application of βSito contributes positively under non-stress and specifically to UV-B stress in terms of improving numerous physiological parameters associated with growth and development such as shoot and root length, RWC, whole plant biomass, chlorophyll pigments, and photosynthetic-related parameters (Pn, Gs, Tr, WUEi, Fv/Fm, and NPQ) in Sβ compared with Nβ plants. Moreover, enhanced oxidative stress tolerance of Sβuvs vs. Nβuvs plants under stress was attributed to low levels of ROS and substantial trigger in activities of antioxidant enzymes (SOD, POD, CAT, and APX). Metabolic analysis was performed using GC-TOFMS, which revealed higher accumulation of several key metabolites including organic acids, sugars, amino acids, and others in Sβuvs vs. Nβuvs plants, which were mainly reduced in Nβ plants under stress vs. non-stress conditions. CONCLUSION These results provide useful data regarding the important role of βSito on growth maintenance and modulation of several metabolites associated with osmotic and redox adjustments during UV-B stress tolerance in rice plants. Importantly, βSito-regulated plasticity could further be explored specifically in relation to different environmental stresses in other economically useful crop plants.
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Affiliation(s)
- Raheel Shahzad
- Department of Biotechnology, Faculty of Science and Technology, Universitas Muhammadiyah Bandung, Bandung, West Java, 40614, Indonesia. .,National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Mohamed Ewas
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China. .,Department of Plant Genetic Resources, Desert Research Center, Cairo, 11753, Egypt.
| | - Putri Widyanti Harlina
- Department of Food Technology, Faculty of Science and Technology, Universitas Muhammadiyah Bandung, Bandung, West Java, 40614, Indonesia
| | - Shahid Ullah Khan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Pan Zhenyuan
- Key Laboratory of Oasis Ecology Agricultural of Xinjiang Bingtuan, Agricultural College, Shihezi University, Shihezi, Xinjiang, 832003, China
| | - Xinhui Nie
- Key Laboratory of Oasis Ecology Agricultural of Xinjiang Bingtuan, Agricultural College, Shihezi University, Shihezi, Xinjiang, 832003, China
| | - Elsayed Nishawy
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.,Department of Plant Genetic Resources, Desert Research Center, Cairo, 11753, Egypt
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Idris M, Seo N, Jiang L, Kiyota S, Hidema J, Iino M. UV-B signalling in rice: Response identification, gene expression profiling and mutant isolation. PLANT, CELL & ENVIRONMENT 2021; 44:1468-1485. [PMID: 33377203 DOI: 10.1111/pce.13988] [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: 09/26/2020] [Revised: 12/23/2020] [Accepted: 12/25/2020] [Indexed: 06/12/2023]
Abstract
Responses of rice seedlings to UV-B radiation (UV-B) were investigated, aiming to establish rice as a model plant for UV-B signalling studies. The growth of japonica rice coleoptiles, grown under red light, was inhibited by brief irradiation with UV-B, but not with blue light. The effective UV-B fluences (10-1 -103 μmol m-2 ) were much lower than those reported in Arabidopsis. The response was much less in indica rice cultivars and its extent varied among Oryza species. We next identified UV-B-specific anthocyanin accumulation in the first leaf of purple rice and used this visible phenotype to isolate mutants. Some isolated mutants were further characterized, and one was found to have a defect in the growth response. Using microarrays, we identified a number of genes that are regulated by low-fluence-rate UV-B in japonica coleoptiles. Some up-regulated genes were analysed by real-time PCR for UV-B specificity and the difference between japonica and indica. More than 70% of UV-B-regulated rice genes had no homologs in UV-B-regulated Arabidopsis genes. Many UV-B-regulated rice genes are related to plant hormones and especially to jasmonate biosynthetic and responsive genes in apparent agreement with the growth response. Possible involvement of two rice homologs of UVR8, a UV-B photoreceptor, is discussed.
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Affiliation(s)
- Muhammad Idris
- Botanical Gardens, Graduate School of Science, Osaka City University, Osaka, Japan
| | - Nobu Seo
- Botanical Gardens, Graduate School of Science, Osaka City University, Osaka, Japan
| | - Lei Jiang
- Botanical Gardens, Graduate School of Science, Osaka City University, Osaka, Japan
| | - Seiichiro Kiyota
- Office of General Administration, Advanced Analysis Center, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Jun Hidema
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Moritoshi Iino
- Botanical Gardens, Graduate School of Science, Osaka City University, Osaka, Japan
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Banaś AK, Zgłobicki P, Kowalska E, Bażant A, Dziga D, Strzałka W. All You Need Is Light. Photorepair of UV-Induced Pyrimidine Dimers. Genes (Basel) 2020; 11:E1304. [PMID: 33158066 PMCID: PMC7694213 DOI: 10.3390/genes11111304] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 10/27/2020] [Accepted: 10/27/2020] [Indexed: 12/18/2022] Open
Abstract
Although solar light is indispensable for the functioning of plants, this environmental factor may also cause damage to living cells. Apart from the visible range, including wavelengths used in photosynthesis, the ultraviolet (UV) light present in solar irradiation reaches the Earth's surface. The high energy of UV causes damage to many cellular components, with DNA as one of the targets. Putting together the puzzle-like elements responsible for the repair of UV-induced DNA damage is of special importance in understanding how plants ensure the stability of their genomes between generations. In this review, we have presented the information on DNA damage produced under UV with a special focus on the pyrimidine dimers formed between the neighboring pyrimidines in a DNA strand. These dimers are highly mutagenic and cytotoxic, thus their repair is essential for the maintenance of suitable genetic information. In prokaryotic and eukaryotic cells, with the exception of placental mammals, this is achieved by means of highly efficient photorepair, dependent on blue/UVA light, which is performed by specialized enzymes known as photolyases. Photolyase properties, as well as their structure, specificity and action mechanism, have been briefly discussed in this paper. Additionally, the main gaps in our knowledge on the functioning of light repair in plant organelles, its regulation and its interaction between different DNA repair systems in plants have been highlighted.
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Affiliation(s)
- Agnieszka Katarzyna Banaś
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Piotr Zgłobicki
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Ewa Kowalska
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Aneta Bażant
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Dariusz Dziga
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland;
| | - Wojciech Strzałka
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
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Yadav A, Singh D, Lingwan M, Yadukrishnan P, Masakapalli SK, Datta S. Light signaling and UV-B-mediated plant growth regulation. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:1270-1292. [PMID: 32237196 DOI: 10.1111/jipb.12932] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 03/26/2020] [Indexed: 05/05/2023]
Abstract
Light plays an important role in plants' growth and development throughout their life cycle. Plants alter their morphological features in response to light cues of varying intensity and quality. Dedicated photoreceptors help plants to perceive light signals of different wavelengths. Activated photoreceptors stimulate the downstream signaling cascades that lead to extensive gene expression changes responsible for physiological and developmental responses. Proteins such as ELONGATED HYPOCOTYL5 (HY5) and CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) act as important factors which modulate light-regulated gene expression, especially during seedling development. These factors function as central regulatory intermediates not only in red, far-red, and blue light pathways but also in the UV-B signaling pathway. UV-B radiation makes up only a minor fraction of sunlight, yet it imparts many positive and negative effects on plant growth. Studies on UV-B perception, signaling, and response in plants has considerably surged in recent times. Plants have developed different strategies to use UV-B as a developmental cue as well as to withstand high doses of UV-B radiation. Plants' responses to UV-B are an integration of its cross-talks with both environmental factors and phytohormones. This review outlines the current developments in light signaling with a major focus on UV-B-mediated plant growth regulation.
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Affiliation(s)
- Arpita Yadav
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, Madhya Pradesh, 462066, India
| | - Deeksha Singh
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, Madhya Pradesh, 462066, India
| | - Maneesh Lingwan
- School of Basic Sciences, Indian Institute of Technology (IIT) Mandi, Kamand, Himachal Pradesh, 175005, India
| | - Premachandran Yadukrishnan
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, Madhya Pradesh, 462066, India
| | - Shyam Kumar Masakapalli
- School of Basic Sciences, Indian Institute of Technology (IIT) Mandi, Kamand, Himachal Pradesh, 175005, India
| | - Sourav Datta
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal, Madhya Pradesh, 462066, India
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Chiari-Andréo BG, Almeida FBD, Yamasaki PR, Santos JLD, Corrêa MA, Chin CM, Isaac VLB. Can natural products improve skin photoprotection? RODRIGUÉSIA 2020. [DOI: 10.1590/2175-7860202071059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract Due to increased UV radiation on the Earth’s surface, caused by depletion of the stratospheric ozone, people have become more susceptible to different types of skin damage, such as erythema, sunburns, and cancer; this is especially of concern in tropical countries. Thus, efforts to improve awareness as well as the use of sunscreen are increasing worldwide. However, synthetic UV filters have been associated with deleterious effects such as photosensitization. Natural products have been used by ancient cultures for several purposes, including protecting the skin from the sun. However, there is still doubt today whether photoprotection is a real phenomenom or whether it is simply tanning of the skin. Plants have self-protective mechanisms and produce secondary metabolites that can protect themselves from UV radiation. Yet, can phytochemical compounds protect human skin? This review discusses the paradoxical effect of chemical UV filters and the influence of phytochemicals in in vitro and in vivo tests of photoprotection.
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Affiliation(s)
| | | | - Paulo Renato Yamasaki
- Universidade Estadual Paulista - UNESP, Brazil; Universidade Paulista - UNIP, Brazil
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17
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Takahashi S, Kojo KH, Hasezawa S. Quantification of Ultraviolet-B Stress-Induced Changes in Nuclear and Cellular Sizes of Tobacco Bright Yellow-2 Cells. CYTOLOGIA 2019. [DOI: 10.1508/cytologia.84.347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Shinya Takahashi
- Faculty of Life and Environmental Sciences, University of Tsukuba
- Graduate School of Frontier Sciences, University of Tokyo
- Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies
| | - Kei H. Kojo
- Research and Development Division, LPIXEL Inc
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18
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Lyu G, Li D, Li S, Hu H. STO and GA negatively regulate UV-B-induced Arabidopsis root growth inhibition. PLANT SIGNALING & BEHAVIOR 2019; 14:1675471. [PMID: 31595819 PMCID: PMC6866680 DOI: 10.1080/15592324.2019.1675471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 09/25/2019] [Accepted: 09/27/2019] [Indexed: 05/03/2023]
Abstract
Studies on UV-B-induced plant photomorphogenesis mainly focus on Arabidopsis shoots (hypocotyl, leaf, petiole, and stem) but less on roots. In the present research, the low-level UV-B (0.2 W·m-2) induced a decrease in the number of root cells in the meristem zone and an inhibition of the cell length in the maturation zone of roots in Arabidopsis thaliana L.Heynh (Col-0). UV-B-induced root growth inhibition was recovered by the addition of GA3 to culture media. GA3 played an important role in UV-B-induced inhibition of root growth. The cop1-4 mutant with more meristem cell and longer mature cells exhibited longer root length under low-level UV-B. COP1 acted as a positive regulator of root growth under UV-B, through regulation of cell division and elongation. The sto mutant exhibited a shorter root length under UV-B with similar cell length but fewer meristem cells compared with wild type (Col-0). STO only regulated cell division, but cell expansion was not affected. UV-B radiation also inhibited the root growth of uvr8 mutant, and the degree of inhibition was greater than for wild type (Ler). UV-B inhibited the growth of Arabidopsis root, possibly because it changes the GA signal and inhibited cell division and cell elongation, which be related to COP1 and STO genes.
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Affiliation(s)
- Guizhen Lyu
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, China
| | - Dongbing Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, China
| | - Shaoshan Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, China
| | - Hongpeng Hu
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou, China
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19
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Robson TM, Aphalo PJ, Banaś AK, Barnes PW, Brelsford CC, Jenkins GI, Kotilainen TK, Łabuz J, Martínez-Abaigar J, Morales LO, Neugart S, Pieristè M, Rai N, Vandenbussche F, Jansen MAK. A perspective on ecologically relevant plant-UV research and its practical application. Photochem Photobiol Sci 2019; 18:970-988. [PMID: 30720036 DOI: 10.1039/c8pp00526e] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Plants perceive ultraviolet-B (UV-B) radiation through the UV-B photoreceptor UV RESISTANCE LOCUS 8 (UVR8), and initiate regulatory responses via associated signalling networks, gene expression and metabolic pathways. Various regulatory adaptations to UV-B radiation enable plants to harvest information about fluctuations in UV-B irradiance and spectral composition in natural environments, and to defend themselves against UV-B exposure. Given that UVR8 is present across plant organs and tissues, knowledge of the systemic signalling involved in its activation and function throughout the plant is important for understanding the context of specific responses. Fine-scale understanding of both UV-B irradiance and perception within tissues and cells requires improved application of knowledge about UV-attenuation in leaves and canopies, warranting greater consideration when designing experiments. In this context, reciprocal crosstalk among photoreceptor-induced pathways also needs to be considered, as this appears to produce particularly complex patterns of physiological and morphological response. Through crosstalk, plant responses to UV-B radiation go beyond simply UV-protection or amelioration of damage, but may give cross-protection over a suite of environmental stressors. Overall, there is emerging knowledge showing how information captured by UVR8 is used to regulate molecular and physiological processes, although understanding of upscaling to higher levels of organisation, i.e. organisms, canopies and communities remains poor. Achieving this will require further studies using model plant species beyond Arabidopsis, and that represent a broad range of functional types. More attention should also be given to plants in natural environments in all their complexity, as such studies are needed to acquire an improved understanding of the impact of climate change in the context of plant-UV responses. Furthermore, broadening the scope of experiments into the regulation of plant-UV responses will facilitate the application of UV radiation in commercial plant production. By considering the progress made in plant-UV research, this perspective highlights prescient topics in plant-UV photobiology where future research efforts can profitably be focussed. This perspective also emphasises burgeoning interdisciplinary links that will assist in understanding of UV-B effects across organisational scales and gaps in knowledge that need to be filled so as to achieve an integrated vision of plant responses to UV-radiation.
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Affiliation(s)
- T Matthew Robson
- Organismal and Evolutionary Biology, Viikki Plant Science Centre (ViPS), University of Helsinki, Finland.
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20
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Guyon-Debast A, Rossetti P, Charlot F, Epert A, Neuhaus JM, Schaefer DG, Nogué F. The XPF-ERCC1 Complex Is Essential for Genome Stability and Is Involved in the Mechanism of Gene Targeting in Physcomitrella patens. FRONTIERS IN PLANT SCIENCE 2019; 10:588. [PMID: 31143199 PMCID: PMC6521618 DOI: 10.3389/fpls.2019.00588] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
The XPF-ERCC1 complex, a highly conserved structure-specific endonuclease, functions in multiple DNA repair pathways that are pivotal for maintaining genome stability, including nucleotide excision repair, interstrand crosslink repair, and homologous recombination. XPF-ERCC1 incises double-stranded DNA at double-strand/single-strand junctions, making it an ideal enzyme for processing DNA structures that contain partially unwound strands. Here, we have examined the role of the XPF-ERCC1 complex in the model bryophyte Physcomitrella patens which exhibits uniquely high gene targeting frequencies. We undertook targeted knockout of the Physcomitrella ERCC1 and XPF genes. Mutant analysis shows that the endonuclease complex is essential for resistance to UV-B and to the alkylating agent MMS, and contributes to the maintenance of genome integrity but is also involved in gene targeting in this model plant. Using different constructs we determine whether the function of the XPF-ERCC1 endonuclease complex in gene targeting was removal of 3' non-homologous termini, similar to SSA, or processing of looped-out heteroduplex intermediates. Interestingly, our data suggest a role of the endonuclease in both pathways and have implications for the mechanism of targeted gene replacement in plants and its specificities compared to yeast and mammalian cells.
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Affiliation(s)
- Anouchka Guyon-Debast
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
| | - Patricia Rossetti
- Laboratoire de Biologie Moléculaire et Cellulaire, Institut de Biologie, Université de Neuchâtel, Neuchâtel, Switzerland
| | - Florence Charlot
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
| | - Aline Epert
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
| | - Jean-Marc Neuhaus
- Laboratoire de Biologie Moléculaire et Cellulaire, Institut de Biologie, Université de Neuchâtel, Neuchâtel, Switzerland
| | - Didier G. Schaefer
- Laboratoire de Biologie Moléculaire et Cellulaire, Institut de Biologie, Université de Neuchâtel, Neuchâtel, Switzerland
| | - Fabien Nogué
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, France
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21
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Nisa MU, Huang Y, Benhamed M, Raynaud C. The Plant DNA Damage Response: Signaling Pathways Leading to Growth Inhibition and Putative Role in Response to Stress Conditions. FRONTIERS IN PLANT SCIENCE 2019; 10:653. [PMID: 31164899 PMCID: PMC6534066 DOI: 10.3389/fpls.2019.00653] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 04/30/2019] [Indexed: 05/02/2023]
Abstract
Maintenance of genome integrity is a key issue for all living organisms. Cells are constantly exposed to DNA damage due to replication or transcription, cellular metabolic activities leading to the production of Reactive Oxygen Species (ROS) or even exposure to DNA damaging agents such as UV light. However, genomes remain extremely stable, thanks to the permanent repair of DNA lesions. One key mechanism contributing to genome stability is the DNA Damage Response (DDR) that activates DNA repair pathways, and in the case of proliferating cells, stops cell division until DNA repair is complete. The signaling mechanisms of the DDR are quite well conserved between organisms including in plants where they have been investigated into detail over the past 20 years. In this review we summarize the acquired knowledge and recent advances regarding the DDR control of cell cycle progression. Studying the plant DDR is particularly interesting because of their mode of development and lifestyle. Indeed, plants develop largely post-embryonically, and form new organs through the activity of meristems in which cells retain the ability to proliferate. In addition, they are sessile organisms that are permanently exposed to adverse conditions that could potentially induce DNA damage in all cell types including meristems. In the second part of the review we discuss the recent findings connecting the plant DDR to responses to biotic and abiotic stresses.
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Bornman JF, Barnes PW, Robson TM, Robinson SA, Jansen MAK, Ballaré CL, Flint SD. Linkages between stratospheric ozone, UV radiation and climate change and their implications for terrestrial ecosystems. Photochem Photobiol Sci 2019; 18:681-716. [DOI: 10.1039/c8pp90061b] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linkages between stratospheric ozone, UV radiation and climate change: terrestrial ecosystems.
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Affiliation(s)
- Janet F. Bornman
- College of Science
- Health
- Engineering and Education
- Murdoch University
- Perth
| | - Paul W. Barnes
- Department of Biological Sciences and Environment Program
- Loyola University
- USA
| | - T. Matthew Robson
- Research Programme in Organismal and Evolutionary Biology
- Viikki Plant Science Centre
- University of Helsinki
- Finland
| | - Sharon A. Robinson
- Centre for Sustainable Ecosystem Solutions
- School of Earth
- Atmosphere and Life Sciences and Global Challenges Program
- University of Wollongong
- Wollongong
| | - Marcel A. K. Jansen
- Plant Ecophysiology Group
- School of Biological
- Earth and Environmental Sciences
- UCC
- Cork
| | - Carlos L. Ballaré
- University of Buenos Aires
- Faculty of Agronomy and IFEVA-CONICET, and IIB
- National University of San Martin
- Buenos Aires
- Argentina
| | - Stephan D. Flint
- Department of Forest
- Rangeland and Fire Sciences
- University of Idaho
- Moscow
- USA
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SOG1 activator and MYB3R repressors regulate a complex DNA damage network in Arabidopsis. Proc Natl Acad Sci U S A 2018; 115:E12453-E12462. [PMID: 30541889 PMCID: PMC6310815 DOI: 10.1073/pnas.1810582115] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
To combat DNA damage, organisms mount a DNA damage response (DDR) that results in cell cycle regulation, DNA repair and, in severe cases, cell death. Underscoring the importance of gene regulation in this response, studies in Arabidopsis have demonstrated that all of the aforementioned processes rely on SUPPRESSOR OF GAMMA RESPONSE 1 (SOG1), a NAC family transcription factor (TF) that has been functionally equated to the mammalian tumor suppressor, p53. However, the expression networks connecting SOG1 to these processes remain largely unknown and, although the DDR spans from minutes to hours, most transcriptomic data correspond to single time-point snapshots. Here, we generated transcriptional models of the DDR from GAMMA (γ)-irradiated wild-type and sog1 seedlings during a 24-hour time course using DREM, the Dynamic Regulatory Events Miner, revealing 11 coexpressed gene groups with distinct biological functions and cis-regulatory features. Within these networks, additional chromatin immunoprecipitation and transcriptomic experiments revealed that SOG1 is the major activator, directly targeting the most strongly up-regulated genes, including TFs, repair factors, and early cell cycle regulators, while three MYB3R TFs are the major repressors, specifically targeting the most strongly down-regulated genes, which mainly correspond to G2/M cell cycle-regulated genes. Together these models reveal the temporal dynamics of the transcriptional events triggered by γ-irradiation and connects these events to TFs and biological processes over a time scale commensurate with key processes coordinated in response to DNA damage, greatly expanding our understanding of the DDR.
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Fraikin GY, Belenikina NS, Rubin AB. Damaging and Defense Processes Induced in Plant Cells by UVB Radiation. BIOL BULL+ 2018. [DOI: 10.1134/s1062359018060031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Fraikin GY. Signaling Mechanisms Regulating Diverse Plant Cell Responses to UVB Radiation. BIOCHEMISTRY (MOSCOW) 2018; 83:787-794. [PMID: 30200863 DOI: 10.1134/s0006297918070027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
UVB radiation (290-320 nm) causes diverse effects in plant cells that vary with the fluence rate of exposure. High fluence rates of UVB radiation cause damage to DNA and formation of reactive oxygen species in mitochondria and chloroplasts, which lead to oxidation of membrane proteins and lipids and inhibition of cellular functions. In response to oxidative stress, mitochondrial transmembrane potential dissipates, resulting in cytochrome c release and activation of metacaspases. This leads to the apoptosis-like cell death. The signaling mechanism based on UVB DNA damage includes checkpoint activation, cell-cycle arrest, and finally programmed cell death with characteristic DNA fragmentation and morphological hallmarks typical of apoptotic cells. Recently, it was shown that among the components of this signaling mechanism the transcriptional factor SOG1 (suppressor of gamma response 1) plays a key role in regulation of programmed cell death in plants. In contrast to its damaging effects, UVB radiation at low fluence rates can act as a regulatory signal that is specifically perceived by plants to promote acclimation and survival in sunlight. The protective action of UVB is based on expression of various genes, including those encoding flavonoid synthesis enzymes that provide a UVB-absorbing sunscreen in epidermal tissues and DNA photorepair enzymes. These processes are mediated by the UVB photoreceptor UVR8, which has been recently characterized at the molecular level. Now progress is made in uncovering the UVR8-mediated signaling pathway mechanism in the context of UVB photon perception and revealing the biochemical components of the early stages of light signal transduction. In this review, attention is focused on the achievements in studying these UVB-induced signaling processes.
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Affiliation(s)
- G Ya Fraikin
- Lomonosov Moscow State University, Moscow, 119991, Russia.
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Gupta S, Gupta V, Singh V, Varadwaj PK. Extrapolation of significant genes and transcriptional regulatory networks involved in Zea mays in response in UV-B stress. Genes Genomics 2018; 40:973-990. [PMID: 30155715 DOI: 10.1007/s13258-018-0705-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/06/2018] [Indexed: 12/21/2022]
Abstract
A wide range of plant species growth influenced when they exposed to solar UV-B radiation. Leaves of the plant are highly affected by UV-B radiation lead to the reduction in the growth of the plant. Current work demonstrates the comparative transcriptional changes and visible symptoms occurred in the maize leaf growth zone (GZ). Primary objective of this study was to identify differentially expressed genes (DEGs) responsible for leaf growth and their association in the transcriptional regulatory network under UV-B stress. Whole transcriptomic data was analysed and the quality check was tested for each sample and further genome-wide mapping and DEGs were performed. Gene Ontology (GO) based functional annotation, associated transcriptional networks and molecular pathways were annotated. Reduction in cell production due to UV-B stress causes a decrease in leaf's length and size was observed. Further, the specific role of the DEGs, in UV-B signalling pathways and other molecular functions responsible for leaf cell death was discovered. Results also infer that the major changes occurred in the cell cycle, transcriptional regulation, post-transcriptional modification, phytohormones, flavonoids biosynthesis, and chromatin remodeling. UV-B signalling pathways and the transcriptional regulatory networks infer the different molecular steps along with downstream transcriptional and post-transcriptional control of metabolic enzymes used in long-term memory adoption and attainment resistance to UV-B stress identified. Effects of UV-B radiation on leaf growth was noted in this study. UV-B stress response genes and associated transcriptional regulatory networks were identified, can be used in developing the marker assist UB-B stress tolerant genotypes of the maize.
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Affiliation(s)
- Saurabh Gupta
- Department of Bioinformatics, Indian Institute of Information Technology-Allahabad, Devghat, Jhalwa, Allahabad, UP, 211015, India
| | - Vikas Gupta
- Department of Molecular and Cellular Engineering, JIBB, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, 211007, India
| | - Vishal Singh
- Department of Bioinformatics, Indian Institute of Information Technology-Allahabad, Devghat, Jhalwa, Allahabad, UP, 211015, India
| | - Pritish Kumar Varadwaj
- Department of Bioinformatics, Indian Institute of Information Technology-Allahabad, Devghat, Jhalwa, Allahabad, UP, 211015, India.
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Vandenbussche F, Yu N, Li W, Vanhaelewyn L, Hamshou M, Van Der Straeten D, Smagghe G. An ultraviolet B condition that affects growth and defense in Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 268:54-63. [PMID: 29362084 DOI: 10.1016/j.plantsci.2017.12.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/08/2017] [Accepted: 12/09/2017] [Indexed: 05/20/2023]
Abstract
Ultraviolet B light (UV-B, 280-315 nm) is the shortest wavelength of the solar spectrum reaching the surface of the Earth. It has profound effects on plants, ranging from growth regulation to severe metabolic changes. Low level UV-B mainly causes photomorphogenic effects while higher levels can induce stress, yet these effects tend to overlap. Here we identified a condition that allows growth reduction without obvious detrimental stress in wild type Arabidopsis rosette plants. This condition was used to study the effects of a daily UV-B dose on plant characteristics of UV-B adapted plants in detail. Exploration of the transcriptome of developing leaves indicated downregulation of genes involved in stomata formation by UV-B, while at the same time genes involved in photoprotective pigment biosynthesis were upregulated. These findings correspond with a decreased stomatal density and increased UV-B absorbing pigments. Gene ontology analysis revealed upregulation of defense related genes and meta-analysis showed substantial overlap of the UV-B regulated transcriptome with transcriptomes of salicylate and jasmonate treated as well as herbivore exposed plants. Feeding experiments showed that caterpillars of Spodoptera littoralis are directly affected by UV-B, while performance of the aphid Myzus persicae is diminished by a plant mediated process.
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Affiliation(s)
- Filip Vandenbussche
- Laboratory of Functional Plant Biology, Department of Biology, Faculty of Sciences, Ghent University, KL Ledeganckstraat 35, B-9000 Ghent, Belgium.
| | - Na Yu
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China; Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
| | - Weidong Li
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
| | - Lucas Vanhaelewyn
- Laboratory of Functional Plant Biology, Department of Biology, Faculty of Sciences, Ghent University, KL Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Mohamad Hamshou
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
| | - Dominique Van Der Straeten
- Laboratory of Functional Plant Biology, Department of Biology, Faculty of Sciences, Ghent University, KL Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Guy Smagghe
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium
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Nikitaki Z, Holá M, Donà M, Pavlopoulou A, Michalopoulos I, Angelis KJ, Georgakilas AG, Macovei A, Balestrazzi A. Integrating plant and animal biology for the search of novel DNA damage biomarkers. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2018; 775:21-38. [DOI: 10.1016/j.mrrev.2018.01.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 01/08/2018] [Accepted: 01/16/2018] [Indexed: 12/11/2022]
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Wan J, Zhang P, Wang R, Sun L, Wang W, Zhou H, Xu J. UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2018; 9:618. [PMID: 29868074 PMCID: PMC5966577 DOI: 10.3389/fpls.2018.00618] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 04/18/2018] [Indexed: 05/21/2023]
Abstract
Ultraviolet (UV)-B radiation-induced root bending has been reported; however, the underlying mechanisms largely remain unclear. Here, we investigate whether and how auxin and flavonoids are involved in UV-B radiation-induced root bending in Arabidopsis using physiological, pharmacological, and genetic approaches. UV-B radiation modulated the direction of root growth by decreasing IAA biosynthesis and affecting auxin distribution in the root tips, where reduced auxin accumulation and asymmetric auxin distribution were observed. UV-B radiation increased the distribution of auxin on the nonradiated side of the root tips, promoting growth and causing root bending. Further analysis indicated that UV-B induced an asymmetric accumulation of flavonoids; this pathway is involved in modulating the accumulation and asymmetric distribution of auxin in root tips and the subsequent redirection of root growth by altering the distribution of auxin carriers in response to UV-B radiation. Taken together, our results indicate that UV-B radiation-induced root bending occurred through a flavonoid-mediated phototropic response to UV-B radiation.
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Affiliation(s)
- Jinpeng Wan
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ping Zhang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ruling Wang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China
| | - Liangliang Sun
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China
| | - Wenying Wang
- College of Life Science, Qinghai Normal University, Xining, China
| | - Huakun Zhou
- Key Laboratory of Restoration Ecology of Cold Area in Qinghai Province, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
| | - Jin Xu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China
- *Correspondence: Jin Xu,
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Dotto M, Casati P. Developmental reprogramming by UV-B radiation in plants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 264:96-101. [PMID: 28969807 DOI: 10.1016/j.plantsci.2017.09.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/27/2017] [Accepted: 09/01/2017] [Indexed: 05/08/2023]
Abstract
Plants are extremely plastic organisms with the ability to adapt and respond to the changing environmental conditions surrounding them. Sunlight is one of the main resources for plants, both as a primary energy source for photosynthesis and as a stimulus that regulates different aspects of their growth and development. UV-B comprises wavelengths that correspond to a high energy region of the solar spectrum capable of reaching the biosphere, influencing plant growth. It is currently believed that plants are able to acclimate when growing under the influence of this radiation and perceive it as a signal, without stress signs. Nonetheless, many UV-B induced changes are elicited after DNA damage occurs as a consequence of exposure. In this review we focus on the influence of UV-B on leaf, flower and root development and emphasize the limited understanding of the molecular mechanisms for most of this developmental processes affected by UV-B documented over the years of research in this area.
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Affiliation(s)
- Marcela Dotto
- Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, 3080, Esperanza, Santa Fe, Argentina.
| | - Paula Casati
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, 2000, Rosario, Santa Fe, Argentina.
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31
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Fina J, Casadevall R, AbdElgawad H, Prinsen E, Markakis MN, Beemster GTS, Casati P. UV-B Inhibits Leaf Growth through Changes in Growth Regulating Factors and Gibberellin Levels. PLANT PHYSIOLOGY 2017; 174:1110-1126. [PMID: 28400494 PMCID: PMC5462048 DOI: 10.1104/pp.17.00365] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 04/10/2017] [Indexed: 05/04/2023]
Abstract
Ultraviolet-B (UV-B) radiation affects leaf growth in a wide range of species. In this work, we demonstrate that UV-B levels present in solar radiation inhibit maize (Zea mays) leaf growth without causing any other visible stress symptoms, including the accumulation of DNA damage. We conducted kinematic analyses of cell division and expansion to understand the impact of UV-B radiation on these cellular processes. Our results demonstrate that the decrease in leaf growth in UV-B-irradiated leaves is a consequence of a reduction in cell production and a shortened growth zone (GZ). To determine the molecular pathways involved in UV-B inhibition of leaf growth, we performed RNA sequencing on isolated GZ tissues of control and UV-B-exposed plants. Our results show a link between the observed leaf growth inhibition and the expression of specific cell cycle and developmental genes, including growth-regulating factors (GRFs) and transcripts for proteins participating in different hormone pathways. Interestingly, the decrease in the GZ size correlates with a decrease in the concentration of GA19, the immediate precursor of the active gibberellin, GA1, by UV-B in this zone, which is regulated, at least in part, by the expression of GRF1 and possibly other transcription factors of the GRF family.
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Affiliation(s)
- Julieta Fina
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Romina Casadevall
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Hamada AbdElgawad
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Els Prinsen
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Marios N Markakis
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Gerrit T S Beemster
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Paula Casati
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.);
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
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Tripathi DK, Singh S, Singh VP, Prasad SM, Dubey NK, Chauhan DK. Silicon nanoparticles more effectively alleviated UV-B stress than silicon in wheat (Triticum aestivum) seedlings. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 110:70-81. [PMID: 27470120 DOI: 10.1016/j.plaphy.2016.06.026] [Citation(s) in RCA: 150] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/17/2016] [Accepted: 06/17/2016] [Indexed: 05/19/2023]
Abstract
The role of silicon (Si) in alleviating biotic as well as abiotic stresses is well known. However, the potential of silicon nanoparticle (SiNP) in regulating abiotic stress and associated mechanisms have not yet been explored. Therefore, in the present study hydroponic experiments were conducted to investigate whether Si or SiNp are more effective in the regulation of UV-B stress. UV-B (ambient and enhanced) radiation caused adverse effect on growth of wheat (Triticum aestivum) seedlings, which was accompanied by declined photosynthetic performance and altered vital leaf structures. Levels of superoxide radical and H2O2 were enhanced by UV-B as also evident from their histochemical stainings, which was accompanied by increased lipid peroxidation (LPO) and electrolyte leakage. Activities of superoxide dismutase and ascorbate peroxidase were inhibited by UV-B while catalase and guaiacol peroxidase, and all non-enzymatic antioxidants were stimulated by UV-B. Although, nitric oxide (NO) content was increased at all tested combinations, but its maximum content was observed under SiNps together with UV-B enhanced treatment. Pre-additions of SiNp as well as Si protected wheat seedlings against UV-B by regulating oxidative stress through enhanced antioxidants. Data indicate that SiNp might have protected wheat seedlings through NO-mediated triggering of antioxidant defense system, which subsequently counterbalance reactive oxygen species-induced damage to photosynthesis. Further, SiNp appear to be more effective in reducing UV-B stress than Si, which is related to its greater availability to wheat seedlings.
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Affiliation(s)
- Durgesh Kumar Tripathi
- Centre of Advanced Study in Botany, Department of Botany, Banaras Hindu University Varanasi, 221005, India.
| | - Swati Singh
- D. D. Pant Interdisciplinary Research Laboratory, Department of Botany, University of Allahabad, Allahabad, 211002, India
| | - Vijay Pratap Singh
- Govt. Ramanuj Pratap Singhdev Post Graduate College, Baikunthpur, Koriya, 497335, Chhattisgarh, India.
| | - Sheo Mohan Prasad
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad, 211002, India.
| | - Nawal Kishore Dubey
- Centre of Advanced Study in Botany, Department of Botany, Banaras Hindu University Varanasi, 221005, India
| | - Devendra Kumar Chauhan
- D. D. Pant Interdisciplinary Research Laboratory, Department of Botany, University of Allahabad, Allahabad, 211002, India.
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Bo K, Wang H, Pan Y, Behera TK, Pandey S, Wen C, Wang Y, Simon PW, Li Y, Chen J, Weng Y. SHORT HYPOCOTYL1 Encodes a SMARCA3-Like Chromatin Remodeling Factor Regulating Elongation. PLANT PHYSIOLOGY 2016; 172:1273-1292. [PMID: 27559036 PMCID: PMC5047076 DOI: 10.1104/pp.16.00501] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 08/22/2016] [Indexed: 05/18/2023]
Abstract
In Arabidopsis (Arabidopsis thaliana), the UVR8-mediated signaling pathway is employed to attain UVB protection and acclimation to deal with low-dosage UVB (LDUVB)-induced stresses. Here, we identified SHORT HYPOCOTYL1 (SH1) in cucumber (Cucumis sativus), which regulates LDUVB-dependent hypocotyl elongation by modulating the UVR8 signaling pathway. We showed that hypocotyl elongation in cucumbers carrying the recessive sh1 allele was LDUVB insensitive and that Sh1 encoded a human SMARCA3-like chromatin remodeling factor. The allele frequency and distribution pattern at this locus among natural populations supported the wild cucumber origin of sh1 for local adaptation, which was under selection during domestication. The cultivated cucumber carries predominantly the Sh1 allele; the sh1 allele is nearly fixed in the semiwild Xishuangbanna cucumber, and the wild cucumber population is largely at Hardy-Weinberg equilibrium for the two alleles. The SH1 protein sequence was highly conserved among eukaryotic organisms, but its regulation of hypocotyl elongation in cucumber seems to be a novel function. While Sh1 expression was inhibited by LDUVB, its transcript abundance was highly correlated with hypocotyl elongation rate and the expression level of cell-elongation-related genes. Expression profiling of key regulators in the UVR8 signaling pathway revealed significant differential expression of CsHY5 between two near isogenic lines of Sh1 Sh1 and CsHY5 acted antagonistically at transcriptional level. A working model was proposed in which Sh1 regulates LDUVB-dependent hypocotyl elongation in cucumber through changing the chromatin states and thus the accessibility of CsHY5 in the UVR8 signaling pathway to promoters of LDUVB-responsive genes for hypocotyl elongation.
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Affiliation(s)
- Kailiang Bo
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Hui Wang
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yupeng Pan
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Tusar K Behera
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Sudhakar Pandey
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Changlong Wen
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yuhui Wang
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Philipp W Simon
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yuhong Li
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Jinfeng Chen
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yiqun Weng
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
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Ogawa T, Mori A, Igari K, Morita MT, Tasaka M, Uchida N. Efficient In Planta Detection and Dissection of De Novo Mutation Events in the Arabidopsis thaliana Disease Resistance Gene UNI. PLANT & CELL PHYSIOLOGY 2016; 57:1123-1132. [PMID: 27016096 DOI: 10.1093/pcp/pcw060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 03/16/2016] [Indexed: 06/05/2023]
Abstract
Plants possess disease resistance (R) proteins encoded by R genes, and each R protein recognizes a specific pathogen factor(s) for immunity. Interestingly, a remarkably high degree of polymorphisms in R genes, which are traces of past mutation events during evolution, suggest the rapid diversification of R genes. However, little is known about molecular aspects that facilitate the rapid change of R genes because of the lack of tools that enable us to monitor de novo R gene mutations efficiently in an experimentally feasible time scale, especially in living plants. Here we introduce a model assay system that enables efficient in planta detection of de novo mutation events in the Arabidopsis thaliana R gene UNI in one generation. The uni-1D mutant harbors a gain-of-function allele of the UNI gene. uni-1D heterozygous individuals originally exhibit dwarfism with abnormally short stems. However, interestingly, morphologically normal stems sometimes emerge spontaneously from the uni-1D plants, and the morphologically reverted tissues carry additional de novo mutations in the UNI gene. Strikingly, under an extreme condition, almost half of the examined population shows the reversion phenomenon. By taking advantage of this phenomenon, we demonstrate that the reversion frequency is remarkably sensitive to a variety of fluctuations in DNA stability, underlying a mutable tendency of the UNI gene. We also reveal that activities of the salicylic acid pathway and DNA damage sensor pathway are involved in the reversion phenomenon. Thus, we provide an experimentally feasible model tool to explore factors and conditions that significantly affect the R gene mutation phenomenon.
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Affiliation(s)
- Tomohiko Ogawa
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, 630-0192 Japan
| | - Akiko Mori
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602 Japan
| | - Kadunari Igari
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, 630-0192 Japan
| | - Miyo Terao Morita
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602 Japan
| | - Masao Tasaka
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, 630-0192 Japan
| | - Naoyuki Uchida
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601 Japan
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35
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Wu G, Carville JS, Spalding EP. ABCB19-mediated polar auxin transport modulates Arabidopsis hypocotyl elongation and the endoreplication variant of the cell cycle. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 85:209-18. [PMID: 26662023 PMCID: PMC4744948 DOI: 10.1111/tpj.13095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/19/2015] [Accepted: 11/24/2015] [Indexed: 05/20/2023]
Abstract
Elongation of the Arabidopsis hypocotyl pushes the shoot-producing meristem out of the soil by rapid expansion of cells already present in the embryo. This elongation process is shown here to be impaired by as much as 35% in mutants lacking ABCB19, an ATP-binding cassette membrane protein required for polar auxin transport, during a limited time of fast growth in dim white light beginning 2.5 days after germination. The discovery of high ectopic expression of a cyclin B1;1-based reporter of mitosis throughout abcb19 hypocotyls without an equivalent effect on mitosis prompted investigations of the endoreplication variant of the cell cycle. Flow cytometry performed on nuclei isolated from upper (growing) regions of 3-day-old hypocotyls showed ploidy levels to be lower in abcb19 mutants compared with wild type. CCS52A2 messenger RNA encoding a nuclear protein that promotes a shift from mitosis to endoreplication was lower in abcb19 hypocotyls, and fluorescence microscopy showed the CCS52A2 protein to be lower in the nuclei of abcb19 hypocotyls compared with wild type. Providing abcb19 seedlings with nanomolar auxin rescued their low CCS52A2 levels, endocycle defects, aberrant cyclin B1;1 expression, and growth rate defect. The abcb19-like growth rate of ccs52a2 mutants was not rescued by auxin, placing CCS52A2 after ABCB19-dependent polar auxin transport in a pathway responsible for a component of ploidy-related hypocotyl growth. A ccs52A2 mutation did not affect the level or pattern of cyclin B1;1 expression, indicating that CCS52A2 does not mediate the effect of auxin on cyclin B1;1.
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Affiliation(s)
- Guosheng Wu
- Department of Botany, University of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI, 53706, USA
| | - Jacqueline S Carville
- Department of Botany, University of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI, 53706, USA
| | - Edgar P Spalding
- Department of Botany, University of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI, 53706, USA
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Li N, Teranishi M, Yamaguchi H, Matsushita T, Watahiki MK, Tsuge T, Li SS, Hidema J. UV-B-Induced CPD Photolyase Gene Expression is Regulated by UVR8-Dependent and -Independent Pathways in Arabidopsis. PLANT & CELL PHYSIOLOGY 2015; 56:2014-23. [PMID: 26272552 DOI: 10.1093/pcp/pcv121] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 08/09/2015] [Indexed: 05/21/2023]
Abstract
Plants have evolved various mechanisms that protect against the harmful effects of UV-B radiation (280-315 nm) on growth and development. Cyclobutane pyrimidine dimer (CPD) photolyase, the repair enzyme for UV-B-induced CPDs, is essential for protecting cells from UV-B radiation. Expression of the CPD photolyase gene (PHR) is controlled by light with various wavelengths including UV-B, but the mechanisms of this regulation remain poorly understood. In this study, we investigated the regulation of PHR expression by light with various wavelengths, in particular low-fluence UV-B radiation (280 nm, 0.2 µmol m(-2) s(-1)), in Arabidopsis thaliana seedlings grown under light-dark cycles for 7 d and then adapted to the dark for 3 d. Low-fluence UV-B radiation induced CPDs but not reactive oxygen species. AtPHR expression was effectively induced by UV-B, UV-A (375 nm) and blue light. Expression induced by UV-A and blue light was predominantly regulated by the cryptochrome-dependent pathway, whereas phytochromes A and B played a minor but noticeable role. Expression induced by UV-B was predominantly regulated by the UVR8-dependent pathway. AtPHR expression was also mediated by a UVR8-independent pathway, which is correlated with CPD accumulation induced by UV-B radiation. These results indicate that Arabidopsis has evolved diverse mechanisms to regulate CPD photolyase expression by multiple photoreceptor signaling pathways, including UVR8-dependent and -independent pathways, as protection against harmful effects of UV-B radiation.
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Affiliation(s)
- Nan Li
- Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577 Japan
| | - Mika Teranishi
- Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577 Japan
| | - Hiroko Yamaguchi
- Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577 Japan
| | - Tomonao Matsushita
- Faculty of Agriculture, Kyushu University, Fukuoka, 812-8581 Japan PRESTO, JST, Saitama, 332-0012 Japan
| | - Masaaki K Watahiki
- Division of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, 060-0810 Japan
| | - Tomohiko Tsuge
- Institute for Chemical Research, Kyoto University, Uji, 611-0011 Japan
| | - Shao-Shan Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Jun Hidema
- Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577 Japan
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Takahashi S, Kojo KH, Kutsuna N, Endo M, Toki S, Isoda H, Hasezawa S. Differential responses to high- and low-dose ultraviolet-B stress in tobacco Bright Yellow-2 cells. FRONTIERS IN PLANT SCIENCE 2015; 6:254. [PMID: 25954287 PMCID: PMC4404814 DOI: 10.3389/fpls.2015.00254] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 03/31/2015] [Indexed: 05/14/2023]
Abstract
Ultraviolet (UV)-B irradiation leads to DNA damage, cell cycle arrest, growth inhibition, and cell death. To evaluate the UV-B stress-induced changes in plant cells, we developed a model system based on tobacco Bright Yellow-2 (BY-2) cells. Both low-dose UV-B (low UV-B: 740 J m(-2)) and high-dose UV-B (high UV-B: 2960 J m(-2)) inhibited cell proliferation and induced cell death; these effects were more pronounced at high UV-B. Flow cytometry showed cell cycle arrest within 1 day after UV-B irradiation; neither low- nor high-UV-B-irradiated cells entered mitosis within 12 h. Cell cycle progression was gradually restored in low-UV-B-irradiated cells but not in high-UV-B-irradiated cells. UV-A irradiation, which activates cyclobutane pyrimidine dimer (CPD) photolyase, reduced inhibition of cell proliferation by low but not high UV-B and suppressed high-UV-B-induced cell death. UV-B induced CPD formation in a dose-dependent manner. The amounts of CPDs decreased gradually within 3 days in low-UV-B-irradiated cells, but remained elevated after 3 days in high-UV-B-irradiated cells. Low UV-B slightly increased the number of DNA single-strand breaks detected by the comet assay at 1 day after irradiation, and then decreased at 2 and 3 days after irradiation. High UV-B increased DNA fragmentation detected by the terminal deoxynucleotidyl transferase dUTP nick end labeling assay 1 and 3 days after irradiation. Caffeine, an inhibitor of ataxia telangiectasia mutated (ATM) and ataxia telangiectasia and Rad3-related (ATR) checkpoint kinases, reduced the rate of cell death in high-UV-B-irradiated cells. Our data suggest that low-UV-B-induced CPDs and/or DNA strand-breaks inhibit DNA replication and proliferation of BY-2 cells, whereas larger contents of high-UV-B-induced CPDs and/or DNA strand-breaks lead to cell death.
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Affiliation(s)
- Shinya Takahashi
- Department of Integrated Biosciences, Graduated School of Frontier Sciences, The University of TokyoKashiwa, Japan
- Alliance for Research on North Africa, University of TsukubaTsukuba, Japan
- Ph. D. Program in Life Science Innovation, University of TsukubaTsukuba, Japan
| | - Kei H. Kojo
- Department of Integrated Biosciences, Graduated School of Frontier Sciences, The University of TokyoKashiwa, Japan
- LPixel Inc.Bunkyo-ku, Japan
| | - Natsumaro Kutsuna
- Department of Integrated Biosciences, Graduated School of Frontier Sciences, The University of TokyoKashiwa, Japan
- LPixel Inc.Bunkyo-ku, Japan
| | - Masaki Endo
- Plant Genome Engineering Research Unit, Agrogenomics Research Center, National Institute of Agrobiological SciencesTsukuba, Japan
| | - Seiichi Toki
- Plant Genome Engineering Research Unit, Agrogenomics Research Center, National Institute of Agrobiological SciencesTsukuba, Japan
| | - Hiroko Isoda
- Alliance for Research on North Africa, University of TsukubaTsukuba, Japan
- Ph. D. Program in Life Science Innovation, University of TsukubaTsukuba, Japan
| | - Seiichiro Hasezawa
- Department of Integrated Biosciences, Graduated School of Frontier Sciences, The University of TokyoKashiwa, Japan
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Singh VP, Kumar J, Singh S, Prasad SM. Dimethoate modifies enhanced UV-B effects on growth, photosynthesis and oxidative stress in mung bean (Vigna radiata L.) seedlings: implication of salicylic acid. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2014; 116:13-23. [PMID: 25454516 DOI: 10.1016/j.pestbp.2014.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 09/15/2014] [Accepted: 09/15/2014] [Indexed: 06/04/2023]
Abstract
The present study is aimed to investigate implication of salicylic acid (SA) in regulation of dimethoate (30 and 150 ppm designated as D1 and D2, respectively) and enhanced UV-B radiation (ambient + supplemental; ambient + 4.0 kJ m(-2) and ambient + 8.0 kJ m(-2), designated as UV-B1 and UV-B2, respectively) induced responses in mung bean seedlings. Seeds of Vigna radiata L. cv. Narendra 1 were surface sterilized, washed thoroughly and soaked for 24 h in sterilized distilled water. Soaked seeds were sown in acid washed sterilized sand filled in plastic trays, and incubated in dark at 26 ± 2 °C for 2 days. The seedlings were grown in growth chamber at 26 ± 2 °C with 12 h photoperiod (350 µmol photons m(-2 )s(-1), PAR) and watered regularly. Six day old seedlings of equal size were gently transferred in 0.2 strength Rorison nutrient medium (pH 6.8) for acclimatization. Thereafter, dimethoate (30 and 150 ppm designated as D1 and D2, respectively) and enhanced UV-B radiation treatments were given. On the 12th day, seedlings of each set were harvested and various parameters related to growth, pigments, photosynthesis, oxidative stress and antioxidant system were analyzed. The D2 dose of dimethoate and UV-B1 and UV-B2 alone and together significantly (P < 0.05) declined growth, photosynthetic pigments and photosynthesis (Fv/Fm and qP except NPQ) which were accompanied by significant decrease in SA level. Similarly, D2 and UV-B also enhanced (P < 0.05) accumulation of reactive oxygen species and concomitantly damaging effects on lipids, proteins and membrane stability were observed. In contrast, in SA-pretreated seedlings damaging impacts of D2, UV-B1 and UV-B2 alone and together were significantly (P < 0.05) alleviated. Besides this, interestingly D1 dose of dimethoate alone had stimulatory effect on growth and it also ameliorated damaging effects of both the doses of UV-B. The activity of superoxide dismutase was stimulated by all the combinations. However, catalase, glutathione reductase and dehydroascorbate reductase activities were significantly (P < 0.05) inhibited by D2, UV-B1 and UV-B2 while SA-pretreatment ameliorated D2 and UV-B-induced inhibitions in activities of these enzymes. Total ascorbate and glutathione pools also decreased by D2 and both doses of UV-B; however, in SA-pretreated seedlings their amounts were significantly (P < 0.05) higher than D2, UV-B1 and UV-B2 alone. Interestingly, D1 also alleviated damaging impact of UV-B1 and UV-B2 on total ascorbate and glutathione pools. Results revealed that D2, UV-B1 and UV-B2 might alter SA biosynthesis that results into declined SA level which might be related with their toxicity. However, SA-pretreatment might act as a signal that reduces oxidative stress by triggering up-regulation of antioxidants hence improved growth and photosynthesis noticed. Alleviation of UV-B toxicity by D1 suggests about hormesis that triggers SA biosynthesis and hence protection against both doses of UV-B was observed.
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Affiliation(s)
- Vijay Pratap Singh
- Govt. Ramanuj Pratap Singhdev Post Graduate College, Baikunthpur, Korea, Chhattisgarh 497335, India.
| | - Jitendra Kumar
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad 211 002, India
| | - Samiksha Singh
- Department of Environmental Science, University of Lucknow, Lucknow 226025, India
| | - Sheo Mohan Prasad
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Allahabad 211 002, India.
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