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Mumtaz S, Javed R, Rana JN, Iqbal M, Choi EH. Pulsed high power microwave seeds priming modulates germination, growth, redox homeostasis, and hormonal shifts in barley for improved seedling growth: Unleashing the molecular dynamics. Free Radic Biol Med 2024; 222:371-385. [PMID: 38901500 DOI: 10.1016/j.freeradbiomed.2024.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 06/12/2024] [Accepted: 06/17/2024] [Indexed: 06/22/2024]
Abstract
Increasing the seed germination potential and seedling growth rates play a pivotal role in increasing overall crop productivity. Seed germination and early vegetative (seedling) growth are critical developmental stages in plants. High-power microwave (HPM) technology has facilitated both the emergence of novel applications and improvements to existing in agriculture. The implications of pulsed HPM on agriculture remain unexplored. In this study, we have investigated the effects of pulsed HPM exposure on barley germination and seedling growth, elucidating the plausible underlying mechanisms. Barley seeds underwent direct HPM irradiation, with 60 pulses by 2.04 mJ/pulse, across three distinct irradiation settings: dry, submerged in deionized (DI) water, and submerged in DI water one day before exposure. Seed germination significantly increased in all HPM-treated groups, where the HPM-dry group exhibited a notable increase, with a 2.48-fold rise at day 2 and a 1.9-fold increment at day 3. Similarly, all HPM-treated groups displayed significant enhancements in water uptake, and seedling growth (weight and length), as well as elevated levels of chlorophyll, carotenoids, and total soluble protein content. The obtained results indicate that when comparing three irradiation setting, HPM-dry showed the most promising effects. Condition HPM seed treatment increases the level of reactive species within the barley seedlings, thereby modulating plant biochemistry, physiology, and different cellular signaling cascades via induced enzymatic activities. Notably, the markers associated with plant growth are upregulated and growth inhibitory markers are downregulated post-HPM exposure. Under optimal HPM-dry treatment, auxin (IAA) levels increased threefold, while ABA levels decreased by up to 65 %. These molecular findings illuminate the intricate regulatory mechanisms governing phenotypic changes in barley seedlings subjected to HPM treatment. The results of this study might play a key role to understand molecular mechanisms after pulsed-HPM irradiation of seeds, contributing significantly to address the global need of sustainable crop yield.
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Affiliation(s)
- Sohail Mumtaz
- Plasma Bioscience Research Center (PBRC), Kwangwoon University, Seoul, Republic of Korea; Department of Electrical and Biological Physics, Kwangwoon University, Seoul, Republic of Korea
| | - Rida Javed
- Department of Electrical and Biological Physics, Kwangwoon University, Seoul, Republic of Korea; Department of Plasma Bio Display, Kwangwoon University, Seoul, Republic of Korea
| | - Juie Nahushkumar Rana
- Department of Electrical and Biological Physics, Kwangwoon University, Seoul, Republic of Korea; Department of Plasma Bio Display, Kwangwoon University, Seoul, Republic of Korea
| | - Madeeha Iqbal
- Department of Electrical and Biological Physics, Kwangwoon University, Seoul, Republic of Korea; Department of Plasma Bio Display, Kwangwoon University, Seoul, Republic of Korea
| | - Eun Ha Choi
- Plasma Bioscience Research Center (PBRC), Kwangwoon University, Seoul, Republic of Korea; Department of Electrical and Biological Physics, Kwangwoon University, Seoul, Republic of Korea; Department of Plasma Bio Display, Kwangwoon University, Seoul, Republic of Korea.
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Huang Y, Mei G, Cao D, Qin Y, Yang L, Ruan X. Spermidine enhances heat tolerance of rice seeds during mid-filling stage and promote subsequent seed germination. FRONTIERS IN PLANT SCIENCE 2023; 14:1230331. [PMID: 37790791 PMCID: PMC10543890 DOI: 10.3389/fpls.2023.1230331] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/25/2023] [Indexed: 10/05/2023]
Abstract
Introduction Heat stress is a vital factor which restricts rice seed quality and yield. However, the response mechanism to heat stress in the mid filling stage of rice seed is unclear. Methods In the present study we integrated phenotypic analysis with biochemical, hormone, and gene expression analysis in order to explore technologies for improving rice seeds heat tolerance and subsequent seed germination. Results Spermidine (Spd) application effectively alleviated the damage of heat stress treatment during mid-filling stage (HTM, 12-20 days after pollination) on seed development, promoted subsequent seed germination and seedlings establishment. Spd significantly increased seed dry weight, starch and amylose contents during seed development under heat stress, and improved seed germinate, seedlings establishment and seedling characteristics during germination time. Biochemical analysis indicated that, HTM significantly decreased the activities of several starch synthase enzymes and led to a decrease in starch content. While Spd treatment significantly enhanced the activities of ADP-glucose pyrophosphorylas and granule-bound starch synthase, as well as the corresponding-genes expressions in HTM rice seeds, resulting in the increases of amylose and total starch contents. In addition, Spd significantly increased the catalase and glutathione reductase activities together with corresponding-genes expressions, and lowered the overaccumulation of H2O2 and malondialdehyde in HTM seeds. In the subsequent seed germination process, HTM+Spd seeds exhibited dramatically up-regulated levels of soluble sugars, glucose, ATP and energy charges. Consistently, HTM+Spd seeds showed significantly increased of α-amylose and α-glucosidase activities as well as corresponding-genes expressions during early germination. Moreover, HTM evidently increased the abscisic acid (ABA) content, decreased the gibberellin (GA) content, and accordingly significantly declined the GA/ABA ratio during early rice seeds germination. However, Spd treatment did not significantly affect the metabolism of GA and ABA in seed germination stage. Discussion The present study suggested that Spd treatment could effectively alleviate the negative impact of HTM on seed development and the subsequent seed germination, which might be closely correlated with starch synthesis and antioxidant defense during seed filling period, starch decomposition and energy supply in seed germination period.
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Affiliation(s)
- Yutao Huang
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Gaofu Mei
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Dongdong Cao
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yebo Qin
- Zhejiang Agricultural Technology Extension Center, Hangzhou, China
| | - Liu Yang
- Zhejiang Nongke Seed Co.Ltd, Hangzhou, China
| | - Xiaoli Ruan
- Zhejiang Nongke Seed Co.Ltd, Hangzhou, China
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Cao D, Huang Y, Mei G, Zhang S, Wu H, Zhao T. Spermidine enhances chilling tolerance of kale seeds by modulating ROS and phytohormone metabolism. PLoS One 2023; 18:e0289563. [PMID: 37535595 PMCID: PMC10399780 DOI: 10.1371/journal.pone.0289563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 07/20/2023] [Indexed: 08/05/2023] Open
Abstract
Chilling stress is an important constraint for kale seed germination and seedlings establishment. It is vital to develop an effective approach to enhance kale seed germination ability under chilling stress. The present study reported that spermidine (Spd) could improve seed chilling tolerance in two kale cultivars 'Nagoya' (MGW) and 'Pigeon' (BB) during germination. The results showed that MGW was cold tolerant with a 90.67% germination percentage (GP) under chilling stress, while BB was cold sensitive with a 70.67% GP under chilling stress. Spd content in MGW and BB seeds during seed germination were up-regulated and down-regulated by chilling stress, respectively. Besides, chilling stress apparently decreased the gibberellin (GA) and ethylene (ET) contents, while increased the levels of abscisic acid (ABA) and reactive oxygen species (ROS) in MGW and BB seeds during germination. Exogenous Spd application increased GA, ET contents and decreased ABA content through regulating the gene expressions of metabolic-related enzymes, thus effectively alleviating the low temperature damage on kale seed germination. Besides, Spd significantly increased the activities of superoxide dismutase (SOD) and peroxidase (POD), and reduced the levels of hydrogen peroxide (H2O2) and superoxide anion (O2·-). The present study demonstrated that endogenous Spd metabolism plays an important role in kale seed germination under chilling stress. The effect of exogenous Spd on the metabolism of endogenous Spd, GA, ABA, ET and antioxidant enzymes might be the important reason for promoting the kale seed vigor at low temperature.
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Affiliation(s)
- Dongdong Cao
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yutao Huang
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Gaofu Mei
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Sheng Zhang
- Taizhou Agricultural Technology Extension Center, Taizhou, China
| | - Huaping Wu
- Huzhou Keao Seed Co., Ltd., Huzhou, China
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Zou X, Sun H. DOF transcription factors: Specific regulators of plant biological processes. FRONTIERS IN PLANT SCIENCE 2023; 14:1044918. [PMID: 36743498 PMCID: PMC9897228 DOI: 10.3389/fpls.2023.1044918] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/03/2023] [Indexed: 06/12/2023]
Abstract
Plant biological processes, such as growth and metabolism, hormone signal transduction, and stress responses, are affected by gene transcriptional regulation. As gene expression regulators, transcription factors activate or inhibit target gene transcription by directly binding to downstream promoter elements. DOF (DNA binding with One Finger) is a classic transcription factor family exclusive to plants that is characterized by its single zinc finger structure. With breakthroughs in taxonomic studies of different species in recent years, many DOF members have been reported to play vital roles throughout the plant life cycle. They are not only involved in regulating hormone signals and various biotic or abiotic stress responses but are also reported to regulate many plant biological processes, such as dormancy, tissue differentiation, carbon and nitrogen assimilation, and carbohydrate metabolism. Nevertheless, some outstanding issues remain. This article mainly reviews the origin and evolution, protein structure, and functions of DOF members reported in studies published in many fields to clarify the direction for future research on DOF transcription factors.
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Affiliation(s)
- Xiaoman Zou
- Key Laboratory of Protected Horticulture of Education Ministry, College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Hongmei Sun
- Key Laboratory of Protected Horticulture of Education Ministry, College of Horticulture, Shenyang Agricultural University, Shenyang, China
- National and Local Joint Engineering Research Center of Northern Horticultural Facilities Design and Application Technology, Shenyang, China
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Alamer KH, Attia H. UV-C seed priming improves tomato plant growth against salt stress. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2022. [DOI: 10.1080/16583655.2022.2153443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Khalid H. Alamer
- Biological Sciences Department, Faculty of Science and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Houneida Attia
- Department of Biology, Laboratory of Vegetable Productivity and Environmental Constraint LR18ES04, University Tunis El Manar II, Tunis, Tunisia
- Department of Biology, College of Sciences, Taif University, Taif, Saudi Arabia
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Chen F, Wang N, Zhou J, Zhao Z, Lv K, Huang Y, Huang G, Qiu L. Summer dormancy of Myricaria laxiflora to escape flooding stress: Changes in phytohormones and enzymes induced by environmental factors. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 193:61-69. [PMID: 36327533 DOI: 10.1016/j.plaphy.2022.10.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/13/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Dormancy is an adaptation mechanism of plants to environmental stress. Myricaria laxiflora undergoes a long period of flooding stress every year. In order to determine whether this species escapes flooding stress through dormancy, young branches and leaves were collected at different time points before the onset of flooding, and changes in the content/activity of hormones/enzymes that are closely involved in plant growth were monitored. The inducing environmental factors of summer dormancy were identified. The branches and leaves of M. laxiflora showed the following trends as summer flooding approached: (1) gradual increase in the abscisic acid content; (2) gradual decrease in the gibberellin and cytokinin contents; and (3) a continuous decrease in the activities of malate dehydrogenase (MDH), ribulose diphosphate carboxylase (RuBisCo), and glycolate oxidase (GLO). Pearson correlation analysis revealed (1) daylight duration was highly correlated with the hormone content and enzyme activity; (2) the daily mean air temperature (DMAT) was significantly correlated with the cytokinin content. These findings suggest that daylight duration was the main environmental factor leading to changes in the phytohormone content and enzyme activity as well as leading to summer dormancy. M. laxiflora undergoes dormancy before the onset of summer flooding to escape summer flooding stress. Our data indicate that summer flooding does not impede the survival and growth of M. laxiflora.
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Affiliation(s)
- Fangqing Chen
- Hubei International Scientific and Technological Center of Ecological Conservation and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8, Yichang, Hubei Province, 443002, PR China.
| | - Nin Wang
- Hubei International Scientific and Technological Center of Ecological Conservation and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8, Yichang, Hubei Province, 443002, PR China.
| | - Jumei Zhou
- Hubei International Scientific and Technological Center of Ecological Conservation and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8, Yichang, Hubei Province, 443002, PR China.
| | - Zixian Zhao
- Hubei International Scientific and Technological Center of Ecological Conservation and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8, Yichang, Hubei Province, 443002, PR China.
| | - Kun Lv
- Hubei International Scientific and Technological Center of Ecological Conservation and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8, Yichang, Hubei Province, 443002, PR China.
| | - Yongwen Huang
- Hubei International Scientific and Technological Center of Ecological Conservation and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8, Yichang, Hubei Province, 443002, PR China.
| | - Guiyun Huang
- Yangtze River Rare Plant Research Institute, China Three Gorges Cooperation, Yichang, Hubei Province, 443001, PR China.
| | - Liwen Qiu
- Yangtze River Rare Plant Research Institute, China Three Gorges Cooperation, Yichang, Hubei Province, 443001, PR China.
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Genome-Wide Identification and Analysis of DOF Gene Family in Eugenia uniflora L. (Myrtaceae). Genes (Basel) 2022; 13:genes13122235. [PMID: 36553502 PMCID: PMC9778057 DOI: 10.3390/genes13122235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/16/2022] [Accepted: 11/19/2022] [Indexed: 11/29/2022] Open
Abstract
Eugenia uniflora is a Brazilian native plant species with great ecological and economic importance. It is distributed throughout the Atlantic forest, where two distinct populations show local adaptation to the contrasting conditions of restinga and riparian forest. Among various TFs described in plants, the DOF TF family has been reported to affect flowering and vascular development, making them promising candidates for characterization in E. uniflora. In this study, 28 DOF genes were identified by a genome-wide analysis, of which 20 were grouped into 11 MCOGs by Bayesian phylogeny, suggesting a shared functionallity between members. Based on RNA-seq experiments, we have detected eight drought responsive genes, and SNPs identification revealed population unique polymorphisms, implying a role in local adapatation mechanisms. Finally, analysis of conserved motifs through MEME revealed 15 different protein motifs, and a promoter region analysis returned 40 enriched TF binding motifs, both reporting novel biological functions circa the DOF gene family. In general, the DOF family is found to be conserved both in sequence and expression. Furthermore, this study contributes to both DOF literature and the genetic exploration of native species, elucidating their genetic potential and bringing to light new research topics, paving the way to future studies.
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Smolikova G, Strygina K, Krylova E, Vikhorev A, Bilova T, Frolov A, Khlestkina E, Medvedev S. Seed-to-Seedling Transition in Pisum sativum L.: A Transcriptomic Approach. PLANTS 2022; 11:plants11131686. [PMID: 35807638 PMCID: PMC9268910 DOI: 10.3390/plants11131686] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 12/13/2022]
Abstract
The seed-to-seedling transition is a crucial step in the plant life cycle. The transition occurs at the end of seed germination and corresponds to the initiation of embryonic root growth. To improve our understanding of how a seed transforms into a seedling, we germinated the Pisum sativum L. seeds for 72 h and divided them into samples before and after radicle protrusion. Before radicle protrusion, seeds survived after drying and formed normally developed seedlings upon rehydration. Radicle protrusion increased the moisture content level in seed axes, and the accumulation of ROS first generated in the embryonic root and plumule. The water and oxidative status shift correlated with the desiccation tolerance loss. Then, we compared RNA sequencing-based transcriptomics in the embryonic axes isolated from pea seeds before and after radicle protrusion. We identified 24,184 differentially expressed genes during the transition to the post-germination stage. Among them, 2101 genes showed more prominent expression. They were related to primary and secondary metabolism, photosynthesis, biosynthesis of cell wall components, redox status, and responses to biotic stress. On the other hand, 415 genes showed significantly decreased expression, including the groups related to water deprivation (eight genes) and response to the ABA stimulus (fifteen genes). We assume that the water deprivation group, especially three genes also belonging to ABA stimulus (LTI65, LTP4, and HVA22E), may be crucial for the desiccation tolerance loss during a metabolic switch from seed to seedling. The latter is also accompanied by the suppression of ABA-related transcription factors ABI3, ABI4, and ABI5. Among them, HVA22E, ABI4, and ABI5 were highly conservative in functional domains and showed homologous sequences in different drought-tolerant species. These findings elaborate on the critical biochemical pathways and genes regulating seed-to-seedling transition.
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Affiliation(s)
- Galina Smolikova
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia; (K.S.); (E.K.); (T.B.); (S.M.)
- Correspondence:
| | - Ksenia Strygina
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia; (K.S.); (E.K.); (T.B.); (S.M.)
| | - Ekaterina Krylova
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia; (K.S.); (E.K.); (T.B.); (S.M.)
- Postgenomic Studies Laboratory, Federal Research Center N.I. Vavilov All-Russian Institute of Plant Genetic Resources of Russian Academy of Sciences, 190000 St. Petersburg, Russia;
| | - Aleksander Vikhorev
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia;
| | - Tatiana Bilova
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia; (K.S.); (E.K.); (T.B.); (S.M.)
| | - Andrej Frolov
- Department of Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia;
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany
| | - Elena Khlestkina
- Postgenomic Studies Laboratory, Federal Research Center N.I. Vavilov All-Russian Institute of Plant Genetic Resources of Russian Academy of Sciences, 190000 St. Petersburg, Russia;
| | - Sergei Medvedev
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia; (K.S.); (E.K.); (T.B.); (S.M.)
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Li J, Zhang Y, Xu L, Wang C, Luo Y, Feng S, Yuan Y, Yang Q, Feng B. Genome-Wide Identification of DNA Binding with One Finger ( Dof) Gene Family in Tartary Buckwheat ( Fagopyrum tataricum) and Analysis of Its Expression Pattern after Exogenous Hormone Stimulation. BIOLOGY 2022; 11:biology11020173. [PMID: 35205040 PMCID: PMC8869700 DOI: 10.3390/biology11020173] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/14/2022] [Accepted: 01/18/2022] [Indexed: 01/11/2023]
Abstract
Simple Summary A number of studies have demonstrated that DNA binding with one finger (Dof) proteins are involved in multiple biological processes. In the present study, Dof genes or proteins in Tartary buckwheat (FtDofs) were systematically analysed, including their physical properties, phylogenetic relationships, structure, motif composition, cis-acting elements present in promoter regions, chromosomal distribution, gene duplication events, syntenic relationships, expression patterns in different tissues and different fruit developmental stages and responses to exogenous hormone stimulation. The results indicated that the expansion of FtDofs was mainly due to segmental duplication. The tissue-specific expression patterns of FtDofs and their positive responses to exogenous hormone stimulation suggest that they play important roles in the growth and development of Tartary buckwheat as well as in the adaptation to environmental changes. Collectively, this study lays a foundation for further exploration of the function of FtDof genes in Tartary buckwheat. Abstract DNA binding with one finger (Dof) proteins have been proven to be involved in multiple biological processes. However, genome-wide identification of the Dof gene family has not been reported for Tartary buckwheat (Fagopyrum tataricum). In this study, 35 FtDof proteins were identified, and they could be divided into nine phylogenetic subgroups. Proteins within the same subgroup had similar gene structure and motif composition. Moreover, abundant cis-acting elements were present in the promoter regions of FtDof genes. Segmental duplication was the primary driving force for the evolution of the FtDof gene family. Synteny analysis indicated that Tartary buckwheat was closer to dicotyledons, and more orthologous Dof genes existed among them. The expression pattern of FtDofs in different tissues and at different fruit developmental stages varied. Different tissues contained several genes that were specifically expressed. FtDof expression was mainly upregulated under methyl jasmonate treatment and downregulated under other hormone treatments. Taken together, FtDofs may play important roles in the growth and development of Tartary buckwheat and in response to abiotic and biotic stresses. Therefore, the genome-wide identification and expression pattern analysis of the Tartary buckwheat Dof gene family lays a foundation for further exploration of the functional characteristics of FtDofs in the future.
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Affiliation(s)
- Jing Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Yuchuan Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Lei Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Chenyang Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Yan Luo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Shan Feng
- School of Mathematics and Statistics, Northwestern Polytechnical University, Xi’an 710129, China;
| | - Yuhao Yuan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Qinghua Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
| | - Baili Feng
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Xianyang 712000, China; (J.L.); (Y.Z.); (L.X.); (C.W.); (Y.L.); (Y.Y.); (Q.Y.)
- Correspondence:
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Cai S, Wu L, Wang G, Liu J, Song J, Xu H, Luo J, Shen Y, Shen S. DA-6 improves sunflower seed vigor under Al 3+ stress by regulating Al 3+ balance and ethylene metabolic. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 229:113048. [PMID: 34883324 DOI: 10.1016/j.ecoenv.2021.113048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/05/2021] [Accepted: 11/29/2021] [Indexed: 06/13/2023]
Abstract
Aluminum (Al3+) stress restricts plant seed germination and seedling growth seriously. Here, the sunflower "S175″ variety was used to explore the technique of improving seed vigor under Al3+ stress and investigate the effect of diethyl aminoethyl hexanoate (DA-6) on physiological characteristics in sunflower seeds during germination under Al3+ stress. The results showed that 3.0 mmol·L-1 Al3+ treatment significantly suppressed the sunflower seed germination and seedling growth. Al3+ stress significantly increased Al3+ content and secretion rates of citric and malic acids in sunflower seeds during germination. Besides, endogenous ethylene content was increased in Al3+-treated seeds. DA-6 serves as a positive signal to regulate the sunflower seed germination under Al3+ stress. Moreover, DA-6 enhanced the activities of malic dehydrogenase, citrate synthase, and isocitrate dehydrogenase, up-regulated the expressions of organic acid transport-related genes (ALMT and MATE), resulting in reduced accumulation of Al3+. Furthermore, exogenous DA-6 mitigated excessive accumulation of ethylene by decreasing the 1-aminocyclopropane-1-dihydrodipicolinate synthase activity and related-gene expression. However, DA-6 treatment had no effect on abscisic acid or gibberellin metabolism in sunflower seeds under Al3+ stress. These results confirmed that DA-6 application enhanced the germination capacity through induction of the synthesis and transport of malic and citric acids, and suppression of the excessive accumulation of endogenous ethylene, thus contributing to alleviate Al3+ toxicity in sunflower seeds.
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Affiliation(s)
- Shuyu Cai
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China.
| | - Liyuan Wu
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Guofu Wang
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Jianxin Liu
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Jiangping Song
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Hua Xu
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Jie Luo
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Yi Shen
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
| | - Shuyu Shen
- School of Architectural Engineering, Shaoxing University Yuanpei College, Qunxianzhong Road 2799, Shaoxing 312000, China
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Huang Y, Cai S, Ruan X, Xu J, Cao D. CSN improves seed vigor of aged sunflower seeds by regulating the fatty acid, glycometabolism, and abscisic acid metabolism. J Adv Res 2021; 33:1-13. [PMID: 34603775 PMCID: PMC8463905 DOI: 10.1016/j.jare.2021.01.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/03/2021] [Accepted: 01/29/2021] [Indexed: 11/06/2022] Open
Abstract
Introduction Sunflower seeds possess higher oil content than do cereal crop seeds. Storage of sunflower seeds is accompanied by loss of seed vigor and oxidation of storage and membrane lipids. Objectives This study first reported that compound sodium nitrophenolate (CSN), a new plant growth modulator, improved the germination and seedling emergence of aged sunflower seeds. The present study provide a future reference as to the potential applications of CSN and the regulation mechanism of exogenous substances in increasing aged crop seed vigor. Methods Phenotypic analysis was performed to investigate the effect of CSN on germination and seedling emergence from naturally- and artificially-aged sunflower seeds. The biochemical and enzyme activity analysis were conducted to test the CSN-induced effect on glycometabolism, fatty acid and abscisic acid metabolism. Meanwhile, gene expression analysis was carried out to detect the changes in the transcription level of sunflower seeds during early germination period after CSN treatment. Results CSN application significantly increased the germination rate and seedling emergence rate of sunflower seeds under natural and artificial aging. Biochemical analysis indicated that, CSN treatment significantly enhanced the sucrose and fructose contents in aged sunflower seeds during early germination period. Moreover, the contents of several different fatty acids in CSN-treated sunflower seeds also significantly increased. Enzyme activity analysis revealed that CSN treatment remarkably up-regulated the activities of several critical enzymes related to triacylglycerol hydrolysis. Consequently, the transcription levels of the above key enzymes-related synthetic genes were also significantly up-regulated in CSN treatment. Furthermore, CSN treatment significantly decreased abscisic acid (ABA) content through the regulation of the gene expressions and activities of metabolism related-enzymes. Conclusion Taken together, the contribution of CSN to the improvement of aged sunflower seed germination and seedling emergence might be closely related to the fatty acid, glycometabolism, and ABA metabolism.
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Affiliation(s)
- Yutao Huang
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Science, 310021 Hangzhou, China
| | - Shuyu Cai
- School of Architectural Engineering, Shaoxing University Yuanpei College, 312000 Shaoxing, China
| | - Xiaoli Ruan
- Zhejiang Nongke Seed Co. Ltd, 198 Shiqiao Road, Hangzhou 310021, China
| | - Jun Xu
- Bureau of Agriculture and Rural Affairs of Pinhu City, 500 Xinhuabei Road, Pinhu 314200, China
| | - Dongdong Cao
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Science, 310021 Hangzhou, China
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12
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Huang Y, Lu M, Wu H, Zhao T, Wu P, Cao D. High Drying Temperature Accelerates Sunflower Seed Deterioration by Regulating the Fatty Acid Metabolism, Glycometabolism, and Abscisic Acid/Gibberellin Balance. FRONTIERS IN PLANT SCIENCE 2021; 12:628251. [PMID: 34122464 PMCID: PMC8193951 DOI: 10.3389/fpls.2021.628251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 05/03/2021] [Indexed: 05/04/2023]
Abstract
Sunflower seed storage is accompanied by the loss of seed vigor. Seed drying is a key link between seed harvest and seed storage; however, to date, the effect of seed drying on sunflower seed deterioration during storage remains unclear. The present study performed hot air drying for sunflower seeds with an initial moisture content of 30% to examine the manner in which drying temperature (35, 40, 45, 50, and 55°C) affects the drying performance and seed vigor following storage process (6 and 12 months). A drying temperature of 40°C was evidently safe for sunflower seeds, whereas the high drying temperatures (HTD, 45, 50, and 55°C) significantly lowered sunflower seed vigor by regulating the fatty acid metabolism, glycometabolism, and abscisic acid (ABA)/gibberellin (GA) balance. HDT significantly increased the seed damage rate and accelerated sunflower seed deterioration during natural and artificial aging process. Further biochemical analysis indicated that HDT significantly increased lipoxygenase and dioxygenase activities, leading to malonaldehyde and reactive oxygen species over-accumulation during storage. During early seed germination, HDT significantly inhibited fatty acid hydrolysis and glycometabolism by decreasing triacylglycerol lipase, CoA-SH oxidase, and invertase activities. Moreover, HDT remarkably increased ABA levels but reduced GA levels by regulating gene expressions and metabolic enzyme activities during early imbibitions. Cumulatively, the seed drying effect on sunflower seed vigor deterioration during the storage process may be strongly related to fatty acid oxidation and hydrolysis metabolism, toxic substance accumulation, and ABA/GA balance.
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Affiliation(s)
- Yutao Huang
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Min Lu
- Huzhou Keao Seed Co., Ltd., Huzhou, China
| | - Huaping Wu
- Huzhou Keao Seed Co., Ltd., Huzhou, China
| | | | - Pin Wu
- Huzhou Keao Seed Co., Ltd., Huzhou, China
| | - Dongdong Cao
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- Huzhou Keao Seed Co., Ltd., Huzhou, China
- *Correspondence: Dongdong Cao,
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13
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Longo C, Holness S, De Angelis V, Lepri A, Occhigrossi S, Ruta V, Vittorioso P. From the Outside to the Inside: New Insights on the Main Factors That Guide Seed Dormancy and Germination. Genes (Basel) 2020; 12:genes12010052. [PMID: 33396410 PMCID: PMC7824603 DOI: 10.3390/genes12010052] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 12/11/2022] Open
Abstract
The transition from a dormant to a germinating seed represents a crucial developmental switch in the life cycle of a plant. Subsequent transition from a germinating seed to an autotrophic organism also requires a robust and multi-layered control. Seed germination and seedling growth are multistep processes, involving both internal and external signals, which lead to a fine-tuning control network. In recent years, numerous studies have contributed to elucidate the molecular mechanisms underlying these processes: from light signaling and light-hormone crosstalk to the effects of abiotic stresses, from epigenetic regulation to translational control. However, there are still many open questions and molecular elements to be identified. This review will focus on the different aspects of the molecular control of seed dormancy and germination, pointing out new molecular elements and how these integrate in the signaling pathways already known.
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14
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Huang YT, Wu W, Zou WX, Wu HP, Cao DD. Drying temperature affects rice seed vigor via gibberellin, abscisic acid, and antioxidant enzyme metabolism. J Zhejiang Univ Sci B 2020; 21:796-810. [PMID: 33043645 DOI: 10.1631/jzus.b2000297] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Seed vigor is a key factor affecting seed quality. The mechanical drying process exerts a significant influence on rice seed vigor. The initial moisture content (IMC) and drying temperature are considered the main factors affecting rice seed vigor through mechanical drying. This study aimed to determine the optimum drying temperature for rice seeds according to the IMC, and elucidate the mechanisms mediating the effects of drying temperature and IMC on seed vigor. Rice seeds with three different IMCs (20%, 25%, and 30%) were dried to the target moisture content (14%) at four different drying temperatures. The results showed that the drying temperature and IMC had significant effects on the drying performance and vigor of the rice seeds. The upper limits of drying temperature for rice seeds with 20%, 25%, and 30% IMCs were 45, 42, and 38 °C, respectively. The drying rate and seed temperature increased significantly with increasing drying temperature. The drying temperature, drying rate, and seed temperature showed extremely significant negative correlations with germination energy (GE), germination rate, germination index (GI), and vigor index (VI). A high IMC and drying temperature probably induced a massive accumulation of hydrogen peroxide (H2O2) and superoxide anions in the seeds, enhanced superoxide dismutase (SOD) and catalase (CAT) activity, and increased the abscisic acid (ABA) content. In the early stage of seed germination, the IMC and drying temperature regulated seed germination through the metabolism of H2O2, gibberellin acid (GA), ABA, and α-amylase. These results indicate that the metabolism of reactive oxygen species (ROS), antioxidant enzymes, GA, ABA, and α-amylase might be involved in the mediation of the effects of drying temperature on seed vigor. The results of this study provide a theoretical basis and technical guidance for the mechanical drying of rice seeds.
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Affiliation(s)
- Yu-Tao Huang
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Wei Wu
- Seed Management Station of Zhejiang Province, Hangzhou 310020, China
| | - Wen-Xiong Zou
- Seed Management Station of Zhejiang Province, Hangzhou 310020, China
| | - Hua-Ping Wu
- Huzhou Keao Seed Co., Ltd., Huzhou 313000, China
| | - Dong-Dong Cao
- Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.,Huzhou Keao Seed Co., Ltd., Huzhou 313000, China
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15
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Martín G, Veciana N, Boix M, Rovira A, Henriques R, Monte E. The photoperiodic response of hypocotyl elongation involves regulation of CDF1 and CDF5 activity. PHYSIOLOGIA PLANTARUM 2020; 169:480-490. [PMID: 32379360 DOI: 10.1111/ppl.13119] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/23/2020] [Accepted: 05/03/2020] [Indexed: 06/11/2023]
Abstract
Hypocotyl elongation relies on directional cell expansion, a process under light and circadian clock control. Under short photoperiods (SD), hypocotyl elongation in Arabidopsis thaliana follows a rhythmic pattern, a process in which circadian morning-to-midnight waves of the transcriptional repressors PSEUDO-RESPONSE REGULATORS (PRRs) jointly gate PHYTOCHROME-INTERACTING FACTOR (PIF) activity to dawn. Previously, we described CYCLING DOF FACTOR 5 (CDF5) as a target of this antagonistic PRR/PIF dynamic interplay. Under SD, PIFs induce CDF5 accumulation specifically at dawn, when it promotes the expression of positive cell elongation regulators such as YUCCA8 to induce growth. In contrast to SD, hypocotyl elongation under long days (LD) is largely reduced. Here, we examine whether CDF5 is an actor in this photoperiod specific regulation. We report that transcription of CDF5 is robustly induced in SD compared to LD, in accordance with PIFs accumulating to higher levels in SD, and in contrast to other members of the CDF family, whose expression is mainly clock regulated and have similar waveforms in SD and LD. Notably, when CDF5 was constitutively expressed under LD, CDF5 protein accumulated to levels comparable to SD but was inactive in promoting cell elongation. Similar results were observed for CDF1. Our findings indicate that both CDFs can promote cell elongation specifically in shorter photoperiods, however, their activity in LD is inhibited at the post-translational level. These data not only expand our understanding of the biological role of CDF transcription factors, but also identify a previously unrecognized regulatory layer in the photoperiodic response of hypocotyl elongation.
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Affiliation(s)
- Guiomar Martín
- Center for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, 08193, Spain
- Instituto Gulbenkian de Ciência (IGC), Oeiras, 2780-156, Portugal
| | - Nil Veciana
- Center for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, 08193, Spain
| | - Marc Boix
- Center for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, 08193, Spain
| | - Arnau Rovira
- Center for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, 08193, Spain
| | - Rossana Henriques
- Center for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, 08193, Spain
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork, T23 TK30, Ireland
- Environmental Research Institute, University College Cork, Cork, T23 XE10, Ireland
| | - Elena Monte
- Center for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Barcelona, 08193, Spain
- Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, 08028, Spain
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16
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Carrera-Castaño G, Calleja-Cabrera J, Pernas M, Gómez L, Oñate-Sánchez L. An Updated Overview on the Regulation of Seed Germination. PLANTS 2020; 9:plants9060703. [PMID: 32492790 PMCID: PMC7356954 DOI: 10.3390/plants9060703] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 02/07/2023]
Abstract
The ability of a seed to germinate and establish a plant at the right time of year is of vital importance from an ecological and economical point of view. Due to the fragility of these early growth stages, their swiftness and robustness will impact later developmental stages and crop yield. These traits are modulated by a continuous interaction between the genetic makeup of the plant and the environment from seed production to germination stages. In this review, we have summarized the established knowledge on the control of seed germination from a molecular and a genetic perspective. This serves as a “backbone” to integrate the latest developments in the field. These include the link of germination to events occurring in the mother plant influenced by the environment, the impact of changes in the chromatin landscape, the discovery of new players and new insights related to well-known master regulators. Finally, results from recent studies on hormone transport, signaling, and biophysical and mechanical tissue properties are underscoring the relevance of tissue-specific regulation and the interplay of signals in this crucial developmental process.
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17
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The DOF Transcription Factors in Seed and Seedling Development. PLANTS 2020; 9:plants9020218. [PMID: 32046332 PMCID: PMC7076670 DOI: 10.3390/plants9020218] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 01/28/2023]
Abstract
The DOF (DNA binding with one finger) family of plant-specific transcription factors (TF) was first identified in maize in 1995. Since then, DOF proteins have been shown to be present in the whole plant kingdom, including the unicellular alga Chlamydomonas reinhardtii. The DOF TF family is characterised by a highly conserved DNA binding domain (DOF domain), consisting of a CX2C-X21-CX2C motif, which is able to form a zinc finger structure. Early in the study of DOF proteins, their relevance for seed biology became clear. Indeed, the PROLAMIN BINDING FACTOR (PBF), one of the first DOF proteins characterised, controls the endosperm-specific expression of the zein genes in maize. Subsequently, several DOF proteins from both monocots and dicots have been shown to be primarily involved in seed development, dormancy and germination, as well as in seedling development and other light-mediated processes. In the last two decades, the molecular network underlying these processes have been outlined, and the main molecular players and their interactions have been identified. In this review, we will focus on the DOF TFs involved in these molecular networks, and on their interaction with other proteins.
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18
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Zhou Y, Cheng Y, Wan C, Li J, Yang Y, Chen J. Genome-wide characterization and expression analysis of the Dof gene family related to abiotic stress in watermelon. PeerJ 2020; 8:e8358. [PMID: 32110479 PMCID: PMC7032062 DOI: 10.7717/peerj.8358] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 12/04/2019] [Indexed: 02/05/2023] Open
Abstract
The plant DNA-binding with one finger (Dof) gene family is a class of plant-specific transcription factors that play vital roles in many biological processes and stress responses. In the present study, a total of 36 ClDof genes were identified in the watermelon genome, which were unevenly distributed on 10 chromosomes. Phylogenetic analysis showed that the ClDof proteins could be divided into nine groups, and the members in a particular group had similar motif arrangement and exon-intron structure. Synteny analysis indicated the presence of a large number of syntenic relationship events between watermelon and cucumber. In promoter analysis, five kinds of stress-related and nine kinds of hormone-related cis-elements were identified in the promoter regions of ClDof genes. We then analyzed the expression patterns of nine selected ClDof genes in eight specific tissues by qRT-PCR, and the results showed that they have tissue-specific expression patterns. We also evaluated the expression levels of 12 selected ClDof genes under salt stress and ABA treatments using qRT-PCR. As a result, they showed differential expression under these treatments, suggesting their important roles in stress response. Taken together, our results provide a basis for future research on the biological functions of Dof genes in watermelon.
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Affiliation(s)
- Yong Zhou
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
- Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, Jiangxi Province, China
| | - Yuan Cheng
- Zhejiang Academy of Agricultural Sciences, State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Vegetables, Hanghzou, Zhejiang, China
| | - Chunpeng Wan
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Jingwen Li
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Youxin Yang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Jinyin Chen
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, Jiangxi, China
- Pingxiang University, Pingxiang, Jiangxi, China
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19
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Ruta V, Longo C, Boccaccini A, Madia VN, Saccoliti F, Tudino V, Di Santo R, Lorrai R, Dello Ioio R, Sabatini S, Costi R, Costantino P, Vittorioso P. Inhibition of Polycomb Repressive Complex 2 activity reduces trimethylation of H3K27 and affects development in Arabidopsis seedlings. BMC PLANT BIOLOGY 2019; 19:429. [PMID: 31619182 PMCID: PMC6796367 DOI: 10.1186/s12870-019-2057-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 09/26/2019] [Indexed: 05/21/2023]
Abstract
BACKGROUND Polycomb repressive complex 2 (PRC2) is an epigenetic transcriptional repression system, whose catalytic subunit (ENHANCER OF ZESTE HOMOLOG 2, EZH2 in animals) is responsible for trimethylating histone H3 at lysine 27 (H3K27me3). In mammals, gain-of-function mutations as well as overexpression of EZH2 have been associated with several tumors, therefore making this subunit a suitable target for the development of selective inhibitors. Indeed, highly specific small-molecule inhibitors of EZH2 have been reported. In plants, mutations in some PRC2 components lead to embryonic lethality, but no trial with any inhibitor has ever been reported. RESULTS We show here that the 1,5-bis (3-bromo-4-methoxyphenyl)penta-1,4-dien-3-one compound (RDS 3434), previously reported as an EZH2 inhibitor in human leukemia cells, is active on the Arabidopsis catalytic subunit of PRC2, since treatment with the drug reduces the total amount of H3K27me3 in a dose-dependent fashion. Consistently, we show that the expression level of two PRC2 targets is significantly increased following treatment with the RDS 3434 compound. Finally, we show that impairment of H3K27 trimethylation in Arabidopsis seeds and seedlings affects both seed germination and root growth. CONCLUSIONS Our results provide a useful tool for the plant community in investigating how PRC2 affects transcriptional control in plant development.
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Affiliation(s)
- Veronica Ruta
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Chiara Longo
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Alessandra Boccaccini
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Valentina Noemi Madia
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Chimica e Tecnologie del Farmaco, Dipartimento di Eccellenza 2018-2022, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Francesco Saccoliti
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Chimica e Tecnologie del Farmaco, Dipartimento di Eccellenza 2018-2022, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Valeria Tudino
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Chimica e Tecnologie del Farmaco, Dipartimento di Eccellenza 2018-2022, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Roberto Di Santo
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Chimica e Tecnologie del Farmaco, Dipartimento di Eccellenza 2018-2022, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Riccardo Lorrai
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Raffaele Dello Ioio
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Sabrina Sabatini
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Roberta Costi
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Chimica e Tecnologie del Farmaco, Dipartimento di Eccellenza 2018-2022, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Paolo Costantino
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Paola Vittorioso
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Dipartimento di Biologia e Biotecnologie “C. Darwin”, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy
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Huang Y, Bai X, Luo M, Xing Y. Short Panicle 3 controls panicle architecture by upregulating APO2/RFL and increasing cytokinin content in rice. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2019; 61:987-999. [PMID: 30302902 DOI: 10.1111/jipb.12729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 10/07/2018] [Indexed: 05/20/2023]
Abstract
Inflorescence architecture is a major determinant of spikelet numbers per panicle, a key component of grain yield in rice. In this study, Short Panicle 3 (SP3) was identified from a short panicle 3 (sp3) mutant in which T-DNA was inserted in the promoter of SP3, resulting in a knockdown mutation. SP3 encodes a DNA binding with one finger (Dof) transcriptional activator. Quantitative real time (qRT)-PCR and RNA in situ hybridization assays confirmed that SP3 is preferentially expressed in the young rice inflorescence, specifically in the branch primordial regions. SP3 acts as a negative regulator of inflorescence meristem abortion by upregulating APO2/RFL. SP3 both up- and downregulates expression of genes involved in cytokinin biosynthesis and catabolism, respectively. Consequently, cytokinin concentrations are decreased in young sp3 panicles, thereby leading to small panicles having fewer branches and spikelets. Our findings support a model in which SP3 regulates panicle architecture by modulating cytokinin homeostasis. Potential applications to rice breeding, through gene-editing of the SP3 promoter are assessed.
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Affiliation(s)
- Yong Huang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Xufeng Bai
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Meifang Luo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yongzhong Xing
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
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21
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Qin H, Wang J, Chen X, Wang F, Peng P, Zhou Y, Miao Y, Zhang Y, Gao Y, Qi Y, Zhou J, Huang R. Rice OsDOF15 contributes to ethylene-inhibited primary root elongation under salt stress. THE NEW PHYTOLOGIST 2019; 223:798-813. [PMID: 30924949 DOI: 10.1111/nph.15824] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 03/17/2019] [Indexed: 05/22/2023]
Abstract
In early seedlings, the primary root adapts rapidly to environmental changes through the modulation of endogenous hormone levels. The phytohormone ethylene inhibits primary root elongation, but the underlying molecular mechanism of how ethylene-reduced root growth is modulated in environmental changes remains poorly understood. Here, we show that a novel rice (Oryza sativa) DOF transcription factor OsDOF15 positively regulates primary root elongation by regulating cell proliferation in the root meristem, via restricting ethylene biosynthesis. Loss-of-function of OsDOF15 impaired primary root elongation and cell proliferation in the root meristem, whereas OsDOF15 overexpression enhanced these processes, indicating that OsDOF15 is a key regulator of primary root elongation. This regulation involves the direct interaction of OsDOF15 with the promoter of OsACS1, resulting in the repression of ethylene biosynthesis. The control of ethylene biosynthesis by OsDOF15 in turn regulates cell proliferation in the root meristem. OsDOF15 transcription is repressed by salt stress, and OsDOF15-mediated ethylene biosynthesis plays a role in inhibition of primary root elongation by salt stress. Thus, our data reveal how the ethylene-inhibited primary root elongation is finely controlled by OsDOF15 in response to environmental signal, a novel mechanism of plants responding to salt stress and transmitting the information to ethylene biosynthesis to restrict root elongation.
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Affiliation(s)
- Hua Qin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, 100081, China
| | - Juan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, 100081, China
| | - Xinbing Chen
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Fangfang Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China
| | - Peng Peng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yun Zhou
- Institute of Plant Stress Biology, Collaborative Innovation Center of Crop Stress Biology, Henan University, Kaifeng, Henan, 475001, China
| | - Yuchen Miao
- Institute of Plant Stress Biology, Collaborative Innovation Center of Crop Stress Biology, Henan University, Kaifeng, Henan, 475001, China
| | - Yuqiong Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China
| | - Yadi Gao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yidong Qi
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jiahao Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Rongfeng Huang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, 100081, China
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22
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Wang M, Qu H, Zhang H, Liu S, Li Y, Zhang C. Hormone and RNA-seq analyses reveal the mechanisms underlying differences in seed vigour at different maize ear positions. PLANT MOLECULAR BIOLOGY 2019; 99:461-476. [PMID: 30710225 DOI: 10.1007/s11103-019-00830-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
ABA/GA4 ratio, stress resistance, carbon and nitrogen metabolism, and chromatin structure play important roles in vigour differences of seeds located at different maize ear positions. Seed vigour, which ensures rapid and uniform field emergence across diverse environments, differs at different maize ear positions. However, little is known regarding the associated mechanisms. In this study, we determined that seed vigour, stress resistance, and carbon and nitrogen metabolism were higher in seeds from middle and bottom section of the ear, while the ABA/GA4 ratio in the embryos was significantly lower. Compared with the seeds subjected to repeated pollination during silking, less variation in seed vigour and the ABA/GA4 ratio in the embryos was observed in seeds at different ear positions subjected to single pollination after complete silking. This indicated that single pollination can reduce, but not eliminate, the differences in seed vigour at different ear positions. RNA-seq analysis indicated that the seed vigour differences at the different locations of the maize ears of the single pollinated treatment were related to carbon and nitrogen metabolism. In contrast, the differences in seed vigour under repeated pollination were related to chromatin structure. The present study contributes to our understanding of the mechanisms underlying differences in seed vigour at different positions on the maize ear.
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Affiliation(s)
- Mingming Wang
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Haibin Qu
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Huidi Zhang
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Shuai Liu
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Yan Li
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China.
| | - Chunqing Zhang
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China.
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23
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Arrillaga I, Morcillo M, Zanón I, Lario F, Segura J, Sales E. New Approaches to Optimize Somatic Embryogenesis in Maritime Pine. FRONTIERS IN PLANT SCIENCE 2019; 10:138. [PMID: 30838010 PMCID: PMC6389691 DOI: 10.3389/fpls.2019.00138] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 01/28/2019] [Indexed: 05/22/2023]
Abstract
Maritime pine (Pinus pinaster Aiton) is a coniferous native of the Mediterranean basin. Because of its adaptability to a wide range of environmental conditions, the species have become a model for studies in coniferous forest management and functional genomics. Somatic embryogenesis (SE) has been so far, the preferred biotechnological strategy for maritime pine breeding programs initiated at the middle-end of the 20th century. To overcome the limitations of the induction and maturation phases in maritime pine SE, we analyzed the possible maternal influence on the embryogenic capability of megagametophytes from controlled crosses, as well as the effect of the temperature and water availability during SE process on the production of plants. A strong maternal effect on the embryogenic potential of maritime pine megagametophytes was observed in our experiments using half-sib and full-sib progenies, while paternal effect was almost undetectable. Besides, it seems possible to improve somatic embryo production of maritime pine megagametophytes by adjusting optimal temperature throughout the process: 28°C during induction and proliferation, and 23°C during the maturation phase. Using induction and proliferation media with reduced water availability (6 g/L Gelrite) can also increase embryo production. Since other limitation of maritime pine SE is culture decline of embryogenic masses (EMs), that reduces embryo yield and germination, we assessed the profile of ABA and IAA and the expression of two embryogenesis-related genes (LEC1 and WOX2) during maturation of EMs of two morphotypes that differed in their maturation capability. Spiky morphotype (SK), with high maturation capability, had a steady increase in both hormones along the 12 weeks of the maturation, whereas ABA content in smooth morphotype picked at the 4th week and dropped. EMs with this morphotype also had a higher IAA content at the beginning of the maturation. A decrease of LEC1 and WOX2 gene expression over the course of embryo development was found to be characteristic of the SK with high maturation capability.
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Affiliation(s)
- Isabel Arrillaga
- ERI BiotecMed, Departamento de Biología Vegetal, Facultad de Farmacia, Universidad de Valencia, Valencia, Spain
- *Correspondence: Isabel Arrillaga,
| | - Marian Morcillo
- ERI BiotecMed, Departamento de Biología Vegetal, Facultad de Farmacia, Universidad de Valencia, Valencia, Spain
| | - Israel Zanón
- ERI BiotecMed, Departamento de Biología Vegetal, Facultad de Farmacia, Universidad de Valencia, Valencia, Spain
| | - Francisco Lario
- TRAGSA, Vivero de Maceda, Carretera Maceda – Baldrei, Ourense, Spain
| | - Juan Segura
- ERI BiotecMed, Departamento de Biología Vegetal, Facultad de Farmacia, Universidad de Valencia, Valencia, Spain
| | - Ester Sales
- Departamento de Ciencias Agrarias y del Medio Natural, Escuela Politécnica Superior, Instituto Universitario de Ciencias Ambientales, Universidad de Zaragoza, Huesca, Spain
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24
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Xue J, Li T, Wang S, Xue Y, Hu F, Zhang X. Elucidation of the mechanism of reflowering in tree peony (Paeonia suffruticosa) 'Zi Luo Lan' by defoliation and gibberellic acid application. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 132:571-578. [PMID: 30326436 DOI: 10.1016/j.plaphy.2018.10.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/03/2018] [Accepted: 10/06/2018] [Indexed: 05/06/2023]
Abstract
In this study, the reflowering mechanism of tree peony (Paeonia suffruticosa 'Zi Luo Lan') after defoliation and gibberellic acid (GA) application (autumn-flowering treatment) was investigated by monitoring the morphological changes, measuring the endogenous GA3 and abscisic acid (ABA) contents, and determining the expression patterns of six GA- and two ABA-related genes. The results show that autumn-flowering treatment induced tree peony reflowering in autumn, which was accompanied by nutrient absorption in buds. The application of exogenous GA3 induced a simultaneous increase in GA3 and decrease in ABA levels, suggesting that the high ratios of GA3/ABA may play a key role in inducing tree peony reflowering. RT-qPCR analysis shows that PsCPS and PsGA2ox were significantly induced and inhibited by GA3 application, respectively, which supports the hypothesis that GA3 treatment induces endogenous GA3 production. In addition, GA3 treatment inhibited the expression of the PsGID1c, but its effect on PsGAI1 was limited, whereas the expression of PsGAMYB could be GA- or ABA-related. Furthermore, autumn-flowering treatment significantly inhibited the expression of PsNCED and PsbZIP, which coincides with the observed changes in ABA levels. Therefore, we postulate that autumn-flowering treatment induces tree peony reflowering by inhibiting the function of ABA accumulation and signaling.
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Affiliation(s)
- Jingqi Xue
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Tingting Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China; Institute of Landscape Architecture, Nanjing Forestry University, Nanjing, 210037, China
| | - Shunli Wang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Yuqian Xue
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China
| | - Fengrong Hu
- Institute of Landscape Architecture, Nanjing Forestry University, Nanjing, 210037, China.
| | - Xiuxin Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, China; Department of Peony, Chinese Academy of Agricultural Sciences, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
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25
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Lorrai R, Gandolfi F, Boccaccini A, Ruta V, Possenti M, Tramontano A, Costantino P, Lepore R, Vittorioso P. Genome-wide RNA-seq analysis indicates that the DAG1 transcription factor promotes hypocotyl elongation acting on ABA, ethylene and auxin signaling. Sci Rep 2018; 8:15895. [PMID: 30367178 PMCID: PMC6203721 DOI: 10.1038/s41598-018-34256-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 10/12/2018] [Indexed: 11/23/2022] Open
Abstract
Hypocotyl elongation is influenced by light and hormones, but the molecular mechanisms underlying this process are not yet fully elucidated. We had previously suggested that the Arabidopsis DOF transcription factor DAG1 may be a negative component of the mechanism of light-mediated inhibition of hypocotyl elongation, as light-grown dag1 knock-out mutant seedlings show significant shorter hypocotyls than the wild type. By using high-throughput RNA-seq, we compared the transcriptome profile of dag1 and wild type hypocotyls and seedlings. We identified more than 250 genes differentially expressed in dag1 hypocotyls, and their analysis suggests that DAG1 is involved in the promotion of hypocotyl elongation through the control of ABA, ethylene and auxin signaling. Consistently, ChIP-qPCR results show that DAG1 directly binds to the promoters of WRKY18 encoding a transcription factor involved in ABA signaling, of the ethylene- induced gene ETHYLENE RESPONSE FACTOR (ERF2), and of the SMALL AUXIN UP RNA 67 (SAUR67), an auxin-responding gene encoding a protein promoting hypocotyl cell expansion.
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Affiliation(s)
- Riccardo Lorrai
- Department of Biology and Biotechnology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy
| | - Francesco Gandolfi
- Department of Physics, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy.,CIBIO (Centre for Integrative Biology), Universita' di Trento, 38123, Povo, (TN), Italy
| | - Alessandra Boccaccini
- Department of Biology and Biotechnology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy.,Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015, Lausanne, Switzerland
| | - Veronica Ruta
- Department of Biology and Biotechnology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy
| | - Marco Possenti
- Research Centre for Genomics and Bioinformatics, Council for Agricultural Research and Economics (CREA), Rome, 00178, Italy
| | - Anna Tramontano
- Department of Physics, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy
| | - Paolo Costantino
- Department of Biology and Biotechnology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy
| | - Rosalba Lepore
- Department of Physics, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy. .,SIB Swiss Institute of Bioinformatics, Biozentrum, University of Basel, CH-4056, Basel, Switzerland.
| | - Paola Vittorioso
- Department of Biology and Biotechnology, Sapienza University of Rome, Laboratory affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, 00185, Italy.
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26
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Shu K, Zhou W, Chen F, Luo X, Yang W. Abscisic Acid and Gibberellins Antagonistically Mediate Plant Development and Abiotic Stress Responses. FRONTIERS IN PLANT SCIENCE 2018; 9:416. [PMID: 29636768 PMCID: PMC5881240 DOI: 10.3389/fpls.2018.00416] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 03/15/2018] [Indexed: 05/18/2023]
Abstract
Phytohormones regulate numerous important biological processes in plant development and biotic/abiotic stress response cascades. More than 50 and 100 years have passed since the initial discoveries of the phytohormones abscisic acid (ABA) and gibberellins (GA), respectively. Over the past several decades, numerous elegant studies have demonstrated that ABA and GA antagonistically regulate many plant developmental processes, including seed maturation, seed dormancy and germination, root initiation, hypocotyl and stem elongation, and floral transition. Furthermore, as a well-established stress hormone, ABA plays a key role in plant responses to abiotic stresses, such as drought, flooding, salinity and low temperature. Interestingly, recent evidence revealed that GA are also involved in plant response to adverse environmental conditions. Consequently, the complex crosstalk networks between ABA and GA, mediated by diverse key regulators, have been extensively investigated and documented. In this updated mini-review, we summarize the most recent advances in our understanding of the antagonistically regulatory roles of ABA and GA in different stages of plant development and in various plant-environment interactions, focusing on the crosstalk between ABA and GA at the levels of phytohormone metabolism and signal transduction.
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Affiliation(s)
- Kai Shu
- *Correspondence: Kai Shu, Wenyu Yang,
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