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Li XZ, Zhang XT, Bie XM, Zhang J, Jiang DJ, Tang H, Wang F. Transcriptome analysis of axillary buds in low phosphorus stress and functional analysis of TaWRKY74s in wheat. BMC PLANT BIOLOGY 2024; 24:1. [PMID: 38163871 PMCID: PMC10759677 DOI: 10.1186/s12870-023-04695-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 12/17/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Wheat is one of the main grain crops in the world, and the tiller number is a key factor affecting the yield of wheat. Phosphorus is an essential element for tiller development in wheat. However, due to decreasing phosphorus content in soil, there has been increasing use of phosphorus fertilizer, while imposing risk of soil and water pollution. Hence, it is important to identify low phosphorus tolerance genes and utilize them for stress resistance breeding in wheat. RESULTS We subjected the wheat variety Kenong 199 (KN199) to low phosphorus stress and observed a reduced tiller number. Using transcriptome analysis, we identified 1651 upregulated genes and 827 downregulated of genes after low phosphorus stress. The differentially expressed genes were found to be enriched in the enzyme activity regulation related to phosphorus, hormone signal transduction, and ion transmembrane transport. Furthermore, the transcription factor analysis revealed that TaWRKY74s were important for low phosphorus tolerance. TaWRKY74s have three alleles: TaWRKY74-A, TaWRKY74-B, and TaWRKY74-D, and they all belong to the WRKY family with conserved WRKYGQK motifs. These proteins were found to be located in the nucleus, and they were expressed in axillary meristem, shoot apical meristem(SAM), young leaves, leaf primordium, and spikelet primordium. The evolutionary tree showed that TaWRKY74s were closely related to OsWRKY74s in rice. Moreover, TaWRKY74s-RNAi transgenic plants displayed significantly fewer tillers compared to wild-type plants under normal conditions. Additionally, the tiller numebr of the RNAi transgenic plants was also significantly lower than that of the wild-type plants under low-phosphorus stress, and increased the decrease amplitude. This suggestd that TaWRKY74s are related to phosphorus response and can affect the tiller number of wheat. CONCLUSIONS The results of this research showed that TaWRKY74s were key genes in wheat response to low phosphorus stress, which might regulate wheat tiller number through abscisic acid (ABA) and auxin signal transduction pathways. This research lays the foundation for further investigating the mechanism of TaWRKY74s in the low phosphorus environments and is significant for wheat stress resistance breeding.
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Affiliation(s)
- Xue-Zheng Li
- National Key Laboratory of Wheat Breeding, Shandong Agricultural University, Taian, Shandong, 271018, China
- College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Xiao-Tong Zhang
- National Key Laboratory of Wheat Breeding, Shandong Agricultural University, Taian, Shandong, 271018, China
- College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Xiao-Min Bie
- National Key Laboratory of Wheat Breeding, Shandong Agricultural University, Taian, Shandong, 271018, China
- College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Jing Zhang
- National Key Laboratory of Wheat Breeding, Shandong Agricultural University, Taian, Shandong, 271018, China
- College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Deng-Ji Jiang
- College of Plant Protection, South China Agricultural University, Guangzhou, 510000, China
| | - Heng Tang
- National Key Laboratory of Wheat Breeding, Shandong Agricultural University, Taian, Shandong, 271018, China.
- College of Agriculture, Shandong Agricultural University, Taian, Shandong, 271018, China.
| | - Fang Wang
- National Key Laboratory of Wheat Breeding, Shandong Agricultural University, Taian, Shandong, 271018, China.
- College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China.
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Wakeman A, Bennett T. Auxins and grass shoot architecture: how the most important hormone makes the most important plants. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:6975-6988. [PMID: 37474124 PMCID: PMC10690731 DOI: 10.1093/jxb/erad288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 07/19/2023] [Indexed: 07/22/2023]
Abstract
Cereals are a group of grasses cultivated by humans for their grain. It is from these cereal grains that the majority of all calories consumed by humans are derived. The production of these grains is the result of the development of a series of hierarchical reproductive structures that form the distinct shoot architecture of the grasses. Being spatiotemporally complex, the coordination of grass shoot development is tightly controlled by a network of genes and signals, including the key phytohormone auxin. Hormonal manipulation has therefore been identified as a promising potential approach to increasing cereal crop yields and therefore ultimately global food security. Recent work translating the substantial body of auxin research from model plants into cereal crop species is revealing the contribution of auxin biosynthesis, transport, and signalling to the development of grass shoot architecture. This review discusses this still-maturing knowledge base and examines the possibility that changes in auxin biology could have been a causative agent in the evolution of differences in shoot architecture between key grass species, or could underpin the future selective breeding of cereal crops.
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Affiliation(s)
- Alex Wakeman
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Tom Bennett
- School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
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Shamshad A, Rashid M, Jankuloski L, Ashraf K, Sultan K, Alamri S, Siddiqui MH, Munir T, Zaman QU. Effect of ethyl methanesulfonate mediated mutation for enhancing morpho-physio-biochemical and yield contributing traits of fragrant rice. PeerJ 2023; 11:e15821. [PMID: 37780391 PMCID: PMC10540773 DOI: 10.7717/peerj.15821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/10/2023] [Indexed: 10/03/2023] Open
Abstract
Background Chemical mutagenesis has been successfully used for increasing genetic diversity in crop plants. More than 800 novel mutant types of rice (Oryza sativa L.) have been developed through the successful application of numerous mutagenic agents. Among a wide variety of chemical mutagens, ethyl-methane-sulfonate (EMS) is the alkylating agent that is most commonly employed in crop plants because it frequently induces nucleotide substitutions as detected in numerous genomes. Methods In this study, seeds of the widely consumed Basmati rice variety (Super Basmati, Oryza sativa L.) were treated with EMS at concentrations of 0.25%, 0.50%, 0.75%, 1.0%, and 1.25% to broaden its narrow genetic base. Results Sensitivity to a chemical mutagen such as ethyl methanesulfonate (EMS) was determined in the M1 generation. Results in M1 generation revealed that as the levels of applied EMS increased, there was a significant reduction in the germination percent, root length, shoot length, plant height, productive tillers, panicle length, sterile spikelet, total spikelet, and fertility percent as compared to the control under field conditions. All the aforementioned parameters decreased but there was an increase in EMS mutagens in an approximately linear fashion. Furthermore, there was no germination at 1.25% of EMS treatment for seed germination. A 50% germination was recorded between 0.50% and 0.75% EMS treatments. After germination, the subsequent parameters, viz. root length and shoot length had LD50 between 05.0% and 0.75% EMS dose levels. Significant variation was noticed in the photosynthetic and water related attributes of fragrant rice. The linear increase in the enzymatic attributes was noticed by the EMS mediated treatments. After the establishment of the plants in the M1 generation in the field, it was observed that LD50 for fertility percentage was at EMS 1.0% level, for the rice variety. Conclusion Hence, it is concluded that for creating genetic variability in the rice variety (Super Basmati), EMS doses from 0.5% to 0.75% are the most efficient, and effective.
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Affiliation(s)
- Areeqa Shamshad
- Nuclear Institute for Agriculture and Biology College (NIAB-C), PIEAS, Islamabad, Pakistan
| | - Muhammad Rashid
- Nuclear Institute for Agriculture and Biology College (NIAB-C), PIEAS, Islamabad, Pakistan
| | - Ljupcho Jankuloski
- International Atomic Energy Agency, Joint FAO/IAEA Centre, Plant Breeding and Genetics Section, Vienna, Austria
| | - Kamran Ashraf
- Department of Bioengineering and Biotechnology, School of Biotechnology, Kunming University of Science and Technology, Shanghai, China
- Department of Food Sciences, Government College University Faisalabad, Sahiwal Campus, Faisalabad, Pakistan
| | - Khawar Sultan
- Department of Environmental Sciences, The University of Lahore, Lahore, Pakistan
| | - Saud Alamri
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Manzer H. Siddiqui
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Tehzeem Munir
- Department of Environmental Sciences, The University of Lahore, Lahore, Pakistan
| | - Qamar uz Zaman
- Department of Environmental Sciences, The University of Lahore, Lahore, Pakistan
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Wang T, Li J, Jiang Y, Zhang J, Ni Y, Zhang P, Yao Z, Jiao Z, Li H, Li L, Niu Y, Li Q, Yin G, Niu J. Wheat gibberellin oxidase genes and their functions in regulating tillering. PeerJ 2023; 11:e15924. [PMID: 37671358 PMCID: PMC10476609 DOI: 10.7717/peerj.15924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 07/30/2023] [Indexed: 09/07/2023] Open
Abstract
Multiple genetic factors control tillering, a key agronomy trait for wheat (Triticum aestivum L.) yield. Previously, we reported a dwarf-monoculm mutant (dmc) derived from wheat cultivar Guomai 301, and found that the contents of gibberellic acid 3 (GA3) in the tiller primordia of dmc were significantly higher. Transcriptome analysis indicated that some wheat gibberellin oxidase (TaGAox) genes TaGA20ox-A2, TaGA20ox-B2, TaGA3ox-A2, TaGA20ox-A4, TaGA2ox-A10 and TaGA2ox-B10 were differentially expressed in dmc. Therefore, this study systematically analyzed the roles of gibberellin oxidase genes during wheat tillering. A total of 63 TaGAox genes were identified by whole genome analysis. The TaGAoxs were clustered to four subfamilies, GA20oxs, GA2oxs, GA3oxs and GA7oxs, including seven subgroups based on their protein structures. The promoter regions of TaGAox genes contain a large number of cis-acting elements closely related to hormone, plant growth and development, light, and abiotic stress responses. Segmental duplication events played a major role in TaGAoxs expansion. Compared to Arabidopsis, the gene collinearity degrees of the GAoxs were significantly higher among wheat, rice and maize. TaGAox genes showed tissue-specific expression patterns. The expressions of TaGAox genes (TaGA20ox-B2, TaGA7ox-A1, TaGA2ox10 and TaGA3ox-A2) were significantly affected by exogenous GA3 applications, which also significantly promoted tillering of Guomai 301, but didn't promote dmc. TaGA7ox-A1 overexpression transgenic wheat lines were obtained by Agrobacterium mediated transformation. Genomic PCR and first-generation sequencing demonstrated that the gene was integrated into the wheat genome. Association analysis of TaGA7ox-A1 expression level and tiller number per plant demonstrated that the tillering capacities of some TaGA7ox-A1 transgenic lines were increased. These data demonstrated that some TaGAoxs as well as GA signaling were involved in regulating wheat tillering, but the GA signaling pathway was disturbed in dmc. This study provided valuable clues for functional characterization of GAox genes in wheat.
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Affiliation(s)
- Ting Wang
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Junchang Li
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Yumei Jiang
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Jing Zhang
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Yongjing Ni
- Henan Engineering Research Center of Wheat Spring Freeze Injury Identification, Shangqiu Academy of Agricultural and Forestry Sciences, Shangqiu, Henan, China, Shangqiu, China
| | - Peipei Zhang
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Ziping Yao
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Zhixin Jiao
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Huijuan Li
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Lei Li
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Yufan Niu
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Qiaoyun Li
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Guihong Yin
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
| | - Jishan Niu
- Henan Technology Innovation Centre of Wheat/National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, Henan, China
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Wang R, Yu M, Xia J, Ren Z, Xing J, Li C, Xu Q, Cang J, Zhang D. Cold stress triggers freezing tolerance in wheat (Triticum aestivum L.) via hormone regulation and transcription of related genes. PLANT BIOLOGY (STUTTGART, GERMANY) 2023; 25:308-321. [PMID: 36385725 DOI: 10.1111/plb.13489] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
Low temperatures limit the geographic distribution and yield of plants. Hormones play an important role in coordinating the growth and development of plants and their tolerance to low temperatures. However, the mechanisms by which hormones affect plant resistance to extreme cold stress in the natural environment are still unclear. In this study, two winter wheat varieties with different cold resistances, Dn1 and J22, were used to conduct targeted plant hormone metabolome analysis on the tillering nodes of winter wheat at 5 °C, -10 °C and -25 °C using an LC-ESI-MS/MS system. We screened 39 hormones from 88 plant hormone metabolites and constructed a partial regulatory network of auxin, jasmonic acid and cytokinin. GO analysis and enrichment of KEGG pathways in different metabolites showed that the 'plant hormone signal transduction' pathway was the most common. Our study showed that extreme low temperature increased the most levels of auxin, cytokinin and salicylic acid, and decreased levels of jasmonic acid and abscisic acid, and that levels of auxin, jasmonic acid and cytokinin in Dn1 were higher than those in J22. These changes in hormone levels were associated with changes in gene expression in synthesis, catabolism, transport and signal transduction pathways. These results differ from the previous hormone regulation mechanisms, which were mostly obtained at 4 °C. Our results provide a basis for further understanding the molecular mechanisms by which plant endogenous hormones regulate plant freezing stress tolerance.
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Affiliation(s)
- R Wang
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - M Yu
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - J Xia
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Z Ren
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - J Xing
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - C Li
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - Q Xu
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - J Cang
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - D Zhang
- College of Life Science, Northeast Agricultural University, Harbin, China
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Li Y, Han S, Qi Y. Advances in structure and function of auxin response factor in plants. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2023; 65:617-632. [PMID: 36263892 DOI: 10.1111/jipb.13392] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Auxin is a crucial phytohormone that has various effects on the regulators of plant growth and development. Auxin signal transduction is mainly controlled by two gene families: auxin response factor (ARF) and auxin/indole-3-acetic acid (Aux/IAA). ARFs are plant-specific transcription factors that bind directly to auxin response elements in the promoters of auxin-responsive genes. ARF proteins contain three conserved regions: a conserved N-terminal B3 DNA-binding domain, a variable intermediate middle region domain that functions in activation or repression, and a C-terminal domain including the Phox and Bem1p region for dimerization, similar to the III and IV elements of Aux/IAA, which facilitate protein-protein interaction through homodimerization of ARF proteins or heterodimerization of ARF and Aux/IAA proteins. In the two decades following the identification of the first ARF, 23 ARF members have been identified and characterized in Arabidopsis. Using whole-genome sequencing, 22, 25, 23, 25, and 36 ARF genes have been identified in tomato, rice, wheat, sorghum, and maize, respectively, in addition to which the related biofunctions of some ARFs have been reported. ARFs play crucial roles in regulating the growth and development of roots, leaves, flowers, fruits, seeds, responses to biotic and abiotic stresses, and phytohormone signal crosstalk. In this review, we summarize the research progress on the structures and functions of ARFs in Arabidopsis, tomato, and cereal crops, to provide clues for future basic research on phytohormone signaling and the molecular design breeding of crops.
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Affiliation(s)
- Yonghui Li
- Key Laboratory of Herbage & Endemic Crop Biology of Ministry of Education, Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, School of Life Sciences, Inner Mongolia University, Hohhot, 010000, China
| | - Shaqila Han
- Key Laboratory of Herbage & Endemic Crop Biology of Ministry of Education, Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, School of Life Sciences, Inner Mongolia University, Hohhot, 010000, China
| | - Yanhua Qi
- Key Laboratory of Herbage & Endemic Crop Biology of Ministry of Education, Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, School of Life Sciences, Inner Mongolia University, Hohhot, 010000, China
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
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Yi SN, Mao JX, Zhang XY, Li XM, Zhang ZH, Li H. FveARF2 negatively regulates fruit ripening and quality in strawberry. FRONTIERS IN PLANT SCIENCE 2022; 13:1023739. [PMID: 36388474 PMCID: PMC9660248 DOI: 10.3389/fpls.2022.1023739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Auxin response factors (ARFs) are transcription factors that play important roles in plants. ARF2 is a member of the ARF family and participates in many plant growth and developmental processes. However, the role of ARF2 in strawberry fruit quality remains unclear. In this study, FveARF2 was isolated from the woodland strawberry 'Ruegen' using reverse transcription-polymerase chain reaction (RT-PCR), which showed that FveARF2 expression levels were higher in the stem than in other organs of the 'Ruegen' strawberry. Moreover, FaARF2 was higher in the white fruit stage of cultivated strawberry fruit than in other stage. Subcellular localization analysis showed that FveARF2 is located in the nucleus, while transcriptional activation assays showed that FveARF2 inhibited transcription in yeast. Silencing FveARF2 in cultivated strawberry fruit revealed earlier coloration and higher soluble solid, sugar, and anthocyanin content in the transgenic fruit than in the control fruit, overexpression of FveARF2 in strawberry fruit delayed ripening and lower soluble solid, sugar, and anthocyanin content compared to the control fruit. Gene expression analysis indicated that the transcription levels of the fruit ripening genes FaSUT1, FaOMT, and FaCHS increased in FveARF2-RNAi fruit and decreased in FveARF2-OE fruit, when compared with the control. Furthermore, yeast one-hybrid (Y1H) and GUS activity experiments showed that FveARF2 can directly bind to the AuxRE (TGTCTC) element in the FaSUT1, FaOMT, and FaCHS promoters in vitro and in vivo. Potassium ion supplementation improved the quality of strawberry fruit, while silencing FveARF2 increased potassium ion content in transgenic fruit. The Y1H and GUS activity experiments also confirmed that FveARF2 could directly bind to the promoter of FveKT12, a potassium transporter gene, and inhibited its expression. Taken together, we found that FveARF2 can negatively regulate strawberry fruit ripening and quality, which provides new insight for further study of the molecular mechanism of strawberry fruit ripening.
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Affiliation(s)
- Shan-na Yi
- Liaoning Key Laboratory of Strawberry Breeding and Cultivation, College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Jian-xin Mao
- Liaoning Key Laboratory of Strawberry Breeding and Cultivation, College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Xin-yu Zhang
- Liaoning Key Laboratory of Strawberry Breeding and Cultivation, College of Horticulture, Shenyang Agricultural University, Shenyang, China
- Vegetable Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Xiao-ming Li
- Liaoning Key Laboratory of Strawberry Breeding and Cultivation, College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Zhi-hong Zhang
- Liaoning Key Laboratory of Strawberry Breeding and Cultivation, College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - He Li
- Liaoning Key Laboratory of Strawberry Breeding and Cultivation, College of Horticulture, Shenyang Agricultural University, Shenyang, China
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Han Y, Wang Y, Zhai Y, Wen Z, Liu J, Xi C, Zhao H, Wang Y, Han S. OsOSCA1.1 Mediates Hyperosmolality and Salt Stress Sensing in Oryza sativa. BIOLOGY 2022; 11:biology11050678. [PMID: 35625406 PMCID: PMC9138581 DOI: 10.3390/biology11050678] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 11/16/2022]
Abstract
OSCA (reduced hyperosmolality-induced [Ca2+]i increase) is a family of mechanosensitive calcium-permeable channels that play a role in osmosensing and stomatal immunity in plants. Oryza sativa has 11 OsOSCA genes; some of these were shown to complement hyperosmolality-induced [Ca2+]cyt increases (OICIcyt), salt stress-induced [Ca2+]cyt increases (SICIcyt), and the associated growth phenotype in the Arabidopsis thaliana mutant osca1. However, their biological functions in rice remain unclear. In this paper, we found that OsOSCA1.1 mediates OICIcyt and SICIcyt in rice roots, which are critical for stomatal closure, plant survival, and gene expression in shoots, in response to hyperosmolality and the salt stress treatment of roots. Compared with wild-type (Zhonghua11, ZH11) plants, OICIcyt and SICIcyt were abolished in the roots of 10-day-old ososca1.1 seedlings, in response to treatment with 250 mM of sorbitol and 100 mM of NaCl, respectively. Moreover, hyperosmolality- and salt stress-induced stomatal closure were also disrupted in a 30-day-old ososca1.1 mutant, resulting in lower stomatal resistance and survival rates than that in ZH11. However, overexpression of OsOSCA1.1 in ososca1.1 complemented stomatal movement and survival, in response to hyperosmolality and salt stress. The transcriptomic analysis further revealed the following three types of OsOSCA1.1-regulated genes in the shoots: 2416 sorbitol-responsive, 2349 NaCl-responsive and 1844 common osmotic stress-responsive genes after treated with 250 mM of sorbitol and 125 mM NaCl of in 30-day-old rice roots for 24 h. The Gene Ontology enrichment analysis showed that these OsOSCA1.1-regulated genes were relatively enriched in transcription regulation, hormone response, and phosphorylation terms of the biological processes category, which is consistent with the Cis-regulatory elements ABRE, ARE, MYB and MYC binding motifs that were overrepresented in 2000-bp promoter regions of these OsOSCA1.1-regulated genes. These results indicate that OsOSCA-mediated calcium signaling specifically regulates gene expression, in response to drought and salt stress in rice.
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Affiliation(s)
- Yang Han
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Yinxing Wang
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Yuanjun Zhai
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Zhaohong Wen
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Jin Liu
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Chao Xi
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Heping Zhao
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
| | - Yingdian Wang
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
- Academy of Plateau Science and Sustainability of the People’s Government of Qinghai Province & Beijing Normal University, Qinghai Normal University, Xining 810008, China
| | - Shengcheng Han
- Beijing Key Laboratory of Gene Resources and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing 100875, China; (Y.H.); (Y.W.); (Y.Z.); (Z.W.); (J.L.); (C.X.); (H.Z.); (Y.W.)
- Academy of Plateau Science and Sustainability of the People’s Government of Qinghai Province & Beijing Normal University, Qinghai Normal University, Xining 810008, China
- Correspondence:
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