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Ru C, Hu X, Chen D, Wang W. Drought stimulus enhanced stress tolerance in winter wheat (Triticum aestivum L.) by improving physiological characteristics, growth, and water productivity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108906. [PMID: 38986237 DOI: 10.1016/j.plaphy.2024.108906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/15/2024] [Accepted: 07/03/2024] [Indexed: 07/12/2024]
Abstract
The impact of drought events on the growth and yield of wheat plants has been extensively reported; however, limited information is available on the changes in physiological characteristics and their effects on the growth and water productivity of wheat after repeated drought stimuli. Moreover, whether appropriate drought stimulus can improve stress resistance in plants by improving physiological traits remains to be explored. Thus, in this study, a pot experiment was conducted to investigate the effects of intermittent and persistent mild [65%-75% soil water-holding capacity (SWHC)], moderate (55%-65% SWHC), and severe drought (45%-55% SWHC) stress on the growth, physiological characteristics, yield, and water-use efficiency (WUE) of winter wheat. After the second stress stimulus, persistent severe drought stress resulted in 30.98%, 234.62%, 53.80%, and 31.00% reduction in leaf relative water content, leaf water potential, photosynthetic rate (Pn), and indole-3-acetic acid content (IAA), respectively, compared to the control plants. However, abscisic acid content, antioxidant enzyme activities, and osmoregulatory substance contents increased significantly under drought stress, especially under persistent drought stress. After the second rehydration stimulus (ASRR), the actual and maximum efficiency of PSII and leaf water status in the plants exposed to intermittent moderate drought (IS2) stress were restored to the control levels, resulting in Pn being 102.56% of the control values; instantaneous WUE of the plants exposed to persistent severe drought stress was 1.79 times that of the control plants. In addition, the activities of superoxide dismutase, peroxidase, catalase, and glutathione reductase, as well as the content of proline, under persistent mild drought stress increased by 52.98%, 33.47%, 51.95%, 52.35%, and 17.07% at ASRR, respectively, compared to the control plants, which provided continuous antioxidant protection to wheat plants. This was also demonstrated by the lower H2O2 and MDA contents after rehydration. At ASRR, the IAA content in the IS2 and persistent moderate drought treatments increased by 36.23% and 19.61%, respectively, compared to the control plants, which favored increased aboveground dry mass and plant height. Compared to the control plants, IS2 significantly increased wheat yield, WUE for grain yield, and WUE for biomass, by 10.15%, 32.94%, and 33.16%, respectively. Collectively, IS2 increased grain growth, yield, and WUE, which could be mainly attributed to improved physiological characteristics after drought-stimulated rehydration.
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Affiliation(s)
- Chen Ru
- School of Engineering, Anhui Agricultural University, Hefei, 230036, China
| | - Xiaotao Hu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
| | - Dianyu Chen
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China
| | - Wene Wang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China
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Kang Z, Zhang Y, Cai X, Zhang Z, Xu Z, Meng X, Li X, Hu X. Crosstalk between 5-Aminolevulinic Acid and Abscisic Acid Adjusted Leaf Iron Accumulation and Chlorophyll Synthesis to Enhance the Cold Tolerance in Solanum lycopersicum Seedlings. Int J Mol Sci 2023; 24:10781. [PMID: 37445959 DOI: 10.3390/ijms241310781] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/22/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
Previous studies found that 5-aminolevulinic acid (ALA) and abscisic acid (ABA) can mitigate damage from adversity by enhancing photosynthesis. However, it is not clear whether they have positive effects on iron utilization and chlorophyll synthesis of tomato seedlings under low-temperature stress. To investigate the possible functional relationship between ABA and ALA and elucidate the possible mechanisms of action of ALA to alleviate low-temperature stress in tomato seedlings, this experiment analyzed the effects of ALA and ABA on chlorophyll synthesis in tomato seedling leaves sprayed with exogenous of ALA (25 mg·L-1) or ABA (100 µM) under low-temperature stress (8-18 °C/8-12 °C, day/night). The results show that exogenous ALA increased the Fv/Fm of tomato leaves by 5.31% and increased the accumulation of iron and chlorophyll by 101.15% and 15.18%, respectively, compared to the low-temperature treatment alone, and tomato resistance of low-temperature stress was enhanced. Meanwhile, exogenous application of ALA increased the ABA content by 39.43%, and subsequent application of exogenous ABA revealed that tomato seedlings showed similar effects to exogenous ALA under low-temperature stress, with increased accumulation of iron and chlorophyll in tomato seedlings, which eventually increased the maximum photochemical efficiency of PS II. Under low-temperature stress, application of exogenous ABA significantly reduced ALA content, but the expression of key enzyme genes (PPGD, HEMB1, HEME1, and HEMF1), precursors of chlorophyll synthesis by ALA, was significantly elevated, presumably because the increased activity of these enzymes after external application of ABA accelerated ALA consumption. In conclusion, ABA may crosstalk with ALA to improve the photochemical efficiency and low temperature resistance of tomatoes by regulating chlorophyll synthesis and iron accumulation.
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Affiliation(s)
- Zhen Kang
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Yong Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Xiongchun Cai
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Zhengda Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Zijian Xu
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Xiangguang Meng
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Xiaojing Li
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
| | - Xiaohui Hu
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Key Laboratory of Protected Horticultural Engineering in Northwest, Ministry of Agriculture, Yangling 712100, China
- Shaanxi Protected Agriculture Research Centre, Yangling 712100, China
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3
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Moloi SJ, Ngara R. The roles of plant proteases and protease inhibitors in drought response: a review. FRONTIERS IN PLANT SCIENCE 2023; 14:1165845. [PMID: 37143877 PMCID: PMC10151539 DOI: 10.3389/fpls.2023.1165845] [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: 02/14/2023] [Accepted: 03/30/2023] [Indexed: 05/06/2023]
Abstract
Upon exposure to drought, plants undergo complex signal transduction events with concomitant changes in the expression of genes, proteins and metabolites. For example, proteomics studies continue to identify multitudes of drought-responsive proteins with diverse roles in drought adaptation. Among these are protein degradation processes that activate enzymes and signalling peptides, recycle nitrogen sources, and maintain protein turnover and homeostasis under stressful environments. Here, we review the differential expression and functional activities of plant protease and protease inhibitor proteins under drought stress, mainly focusing on comparative studies involving genotypes of contrasting drought phenotypes. We further explore studies of transgenic plants either overexpressing or repressing proteases or their inhibitors under drought conditions and discuss the potential roles of these transgenes in drought response. Overall, the review highlights the integral role of protein degradation during plant survival under water deficits, irrespective of the genotypes' level of drought resilience. However, drought-sensitive genotypes exhibit higher proteolytic activities, while drought-tolerant genotypes tend to protect proteins from degradation by expressing more protease inhibitors. In addition, transgenic plant biology studies implicate proteases and protease inhibitors in various other physiological functions under drought stress. These include the regulation of stomatal closure, maintenance of relative water content, phytohormonal signalling systems including abscisic acid (ABA) signalling, and the induction of ABA-related stress genes, all of which are essential for maintaining cellular homeostasis under water deficits. Therefore, more validation studies are required to explore the various functions of proteases and their inhibitors under water limitation and their contributions towards drought adaptation.
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Jin Y, Zhao Y, Ai S, Chen X, Liu X, Wang H, Han Y, Ma F, Li C. Induction of polyploid Malus prunifolia and analysis of its salt tolerance. TREE PHYSIOLOGY 2022; 42:2100-2115. [PMID: 35532080 DOI: 10.1093/treephys/tpac053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/19/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
The apple rootstock Malus prunifolia (Willd.) Borkh. is widely used for apple production. Because polyploid plants are often more tolerant to abiotic stress than diploids, we wondered whether polyploidy induction in M. prunifolia might improve its stress tolerance, particularly to high salinity. We used a combination of colchicine and dimethyl sulfoxide (DMSO) to induce chromosome doubling in M. prunifolia and identified the resulting polyploids by stomatal observations and flow cytometry. We found the best way to induce polyploidy in M. prunifolia was to use 2% DMSO and 0.05% colchicine for 2 days for leaves or 0.02% colchicine for stem segments. The results of hydroponic salt treatment showed that polyploid plants were more salt tolerant and had greater photosynthetic efficiency, thicker leaf epidermis and palisade tissues, and shorter but denser root systems than diploids. During salt stress, the polyploid leaves and roots accumulated less Na+, showed upregulated expression of three salt overly sensitive (SOS) pathway genes, and produced fewer reactive oxygen species. The polyploid plants also had considerably higher ABA and jasmonic acid levels than diploid plants under salt stress. Under normal growth conditions, gibberellins (GAs) levels were much lower in polyploid leaves than in diploid leaves; however, after salt treatment, polyploid leaves showed upregulation of essential GAs synthesis genes. In summary, we developed a system for the induction of polyploidy in M. prunifolia and response to salt stress of the resulting polyploids, as reflected in leaf and root morphology, changes in Na+ accumulation, antioxidant capacity and plant hormone levels.
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Affiliation(s)
- Yibo Jin
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Yongjuan Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Shukang Ai
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Xiujiao Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Xiaomin Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Hongying Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Yunqi Han
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, P.R. China
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Hu H, He B, Ma L, Chen X, Han P, Luo Y, Liu Y, Fei X, Wei A. Physiological and transcriptome analyses reveal the photosynthetic response to drought stress in drought-sensitive (Fengjiao) and drought-tolerant (Hanjiao) Zanthoxylum bungeanum cultivars. FRONTIERS IN PLANT SCIENCE 2022; 13:968714. [PMID: 36186061 PMCID: PMC9524374 DOI: 10.3389/fpls.2022.968714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/12/2022] [Indexed: 06/16/2023]
Abstract
As an important economical plant, Zanthoxylum bungeanum is widely cultivated in arid and semi-arid areas. The studies associated with photosynthesis under drought stress were widely carried out, but not yet in Z. bungeanum. Here, the photosynthesis of two Z. bungeanum cultivars (FJ, Z. bungeanum cv. "Fengjiao"; HJ, Z. bungeanum cv. "Hanjiao") was analyzed under drought stress using physiological indicators and transcriptome data. Drought decreased stomatal aperture and stomatal conductance (Gsw), reduced transpiration rate (E) and sub-stomatal CO2 concentration (Ci), and lowered chlorophyll and carotenoid content, which reduced the net photosynthetic rate (Pn) of Z. bungeanum. The higher photosynthetic rate in HJ stemmed from its higher chlorophyll content, larger stomatal aperture and Gsw, and higher Ci. Weighted gene co-expression network analysis (WGCNA) identified several ABA signal transduction genes (PYL4, PYL9, and PYR1), LCH-encoding genes (LHCB4.3), and chlorophyll metabolism genes (CRD1, PORA, and CHLH). Additionally, seven transcription factor genes were identified as important factors regulating photosynthesis under drought conditions. In general, a photosynthetic response model under drought stress was built firstly in Z. bungeanum, and the key genes involved in photosynthesis under drought stress were identified. Therefore, the results in our research provide important information for photosynthesis under drought and provided key clues for future molecular breeding in Z. bungeanum.
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Affiliation(s)
- Haichao Hu
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Beibei He
- College of Horticulture, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
| | - Lei Ma
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Xin Chen
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Peilin Han
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Yingli Luo
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Yonghong Liu
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Xitong Fei
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
| | - Anzhi Wei
- College of Forestry, Northwest Agriculture and Forestry University, Xianyang, Shaanxi, China
- Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Xianyang, Shaanxi, China
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6
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Mangena P. Pleiotropic effects of recombinant protease inhibitors in plants. FRONTIERS IN PLANT SCIENCE 2022; 13:994710. [PMID: 36119571 PMCID: PMC9478479 DOI: 10.3389/fpls.2022.994710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
Recombinant gene encoded protease inhibitors have been identified as some of the most effective antidigestive molecules to guard against proteolysis of essential proteins and plant attacking proteases from herbivorous pests and pathogenic microorganisms. Protease inhibitors (PIs) can be over expressed in transgenic plants to complement internal host defense systems, Bt toxins in genetically modified pest resistance and abiotic stress tolerance achieved through cystatins expression. Although the understanding of the role of proteolytic enzymes and their inhibitors encoded by both endogenous and transgenes expressed in crop plants has significantly advanced, their implication in biological systems still requires further elucidations. This paper, therefore, succinctly reviewed most recently published literature on recombinant proteases inhibitors (RPIs), focusing mainly on their unintended consequences in plants, other living organisms, and the environment. The review discusses major negative and unintended effects of RPIs involving the inhibitors' non-specificity on protease enzymes, non-target organisms and ubiquitous versatility in their mechanism of inhibition. The paper also discusses some direct and indirect effects of RPIs such as degradation by distinct classes of proteases, reduced functionality due to plant exposure to severe environmental stress and any other potential negative influences exerted on both the host plant as well as the environment. These pleiotropic effects must be decisively monitored to eliminate and prevent any potential adverse effects that transgenic plants carrying recombinant inhibitor genes may have on non-target organisms and biodiversity.
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Balbinott N, Margis R. Review: Unraveling the origin of the structural and functional diversity of plant cystatins. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 321:111342. [PMID: 35696902 DOI: 10.1016/j.plantsci.2022.111342] [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: 03/16/2022] [Revised: 05/02/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
The regulation of protease activity is a critical factor for the physiological balance during plant growth and development. Among the proteins involved in controlling protease activity are the cystatins, well-described inhibitors of cysteine proteases present in viruses, bacteria and most Eukaryotes. Plant cystatins, commonly called phytocystatins, display unique structural and functional diversity and are classified according to their molecular weight as type-I, -II, and -III. Their gene structure is highly conserved across Viridiplantae and provides insights into their evolutionary relationships. Many type-I phytocystatins with introns share sequence similarities with type-II phytocystatins. New data shows that they could have originated from recent losses of the carboxy-terminal extension present in type-II phytocystatins. Intronless type-I phytocystatins originated from a single event shared by flowering plants. Pieces of evidence show multiple events of gene duplications, intron losses, and gains throughout the expansion and diversity of the phytocystatin family. Gene duplication events in Gymnosperms and Eudicots resulted in inhibitors with amino acid substitutions that may modify their interaction with target proteases and other proteins. This review brings a phylogenomic analysis of plant cystatin evolution and contributes to a broader understanding of their origins. A complete functional genomic analysis among phytocystatins and their roles in plant development and responses to abiotic and biotic stresses remains a question to be fully solved.
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Affiliation(s)
- Natalia Balbinott
- Laboratório de Genomas e Populações de Plantas, Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Brazil; Programa de Pós-graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Brazil
| | - Rogerio Margis
- Laboratório de Genomas e Populações de Plantas, Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Brazil; Programa de Pós-graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Brazil; Programa de Pós-graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Brazil; Programa INCT Plant Stress Biotech, EMBRAPA, CENARGEN, Brasilia, DF, Brazil.
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Zhou Z, Zhang L, Shu J, Wang M, Li H, Shu H, Wang X, Sun Q, Zhang S. Root Breeding in the Post-Genomics Era: From Concept to Practice in Apple. PLANTS (BASEL, SWITZERLAND) 2022; 11:1408. [PMID: 35684181 PMCID: PMC9182997 DOI: 10.3390/plants11111408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/05/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
The development of rootstocks with a high-quality dwarf-type root system is a popular research topic in the apple industry. However, the precise breeding of rootstocks is still challenging, mainly because the root system is buried deep underground, roots have a complex life cycle, and research on root architecture has progressed slowly. This paper describes ideas for the precise breeding and domestication of wild apple resources and the application of key genes. The primary goal of this research is to combine the existing rootstock resources with molecular breeding and summarize the methods of precision breeding. Here, we reviewed the existing rootstock germplasm, high-quality genome, and genetic resources available to explain how wild resources might be used in modern breeding. In particular, we proposed the 'from genotype to phenotype' theory and summarized the difficulties in future breeding processes. Lastly, the genetics governing root diversity and associated regulatory mechanisms were elaborated on to optimize the precise breeding of rootstocks.
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Affiliation(s)
- Zhou Zhou
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Lei Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Jing Shu
- College of Forestry Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China;
| | - Mengyu Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Han Li
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Huairui Shu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Xiaoyun Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Qinghua Sun
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Shizhong Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
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9
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Qiu X, Wang G, Abou-Elwafa SF, Fu J, Liu Z, Zhang P, Xie X, Ku L, Ma Y, Guan X, Wei L. Genome-wide identification of HD-ZIP transcription factors in maize and their regulatory roles in promoting drought tolerance. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:425-437. [PMID: 35400885 PMCID: PMC8943141 DOI: 10.1007/s12298-022-01147-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/11/2022] [Accepted: 02/11/2022] [Indexed: 05/31/2023]
Abstract
Drought is the main limiting factor of maize productivity, therefore improving drought tolerance in maize has potential practical importance. Cloning and functional verification of drought-tolerant genes is of great importance to understand molecular mechanisms under drought stress. Here, we employed a bioinformatic pipeline to identify 42 ZmHDZ drought responsive genes using previously reported maize transcriptomic datasets. The coding sequences, exon-intron structure and domain organization of all the 42 genes were identified. Phylogenetic analysis revealed evolutionary conservation of members of the ZmHDZ genes in maize. Several regulatory elements associated with drought tolerance were identified in the promoter regions of ZmHDZ genes, indicating the implication of these genes in plant response to drought stress. 42 ZmHDZ genes were distributed unevenly on 10 chromosomes, and 24 pairs of gene duplications were the segmental duplication. The expression of several ZmHDZ genes was upregulated under drought stress, and ZmHDZ9 overexpressing transgenic plants exhibited higher SOD and POD activities and higher accumulation of soluble proteins under drought stress which resulted in enhanced developed phenotype and improved resistance. The present study provides evidence for the evolutionary conservation of HD-ZIP transcription factors homologs in maize. The results further provide a comprehensive insight into the roles of ZmHDZ genes in regulating drought stress tolerance in maize.
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Affiliation(s)
- Xiao Qiu
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - GuoRui Wang
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | | | - Jiaxu Fu
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - Zhixue Liu
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - PengYu Zhang
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - Xiaowen Xie
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - Lixia Ku
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - Ying Ma
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - XiaoKang Guan
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
| | - Li Wei
- College of Agronomy, Henan Agricultural University, Zhengzhou, 450002 China
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Mao X, Hou N, Liu Z, He J. Profiling of N 6-Methyladenosine (m 6A) Modification Landscape in Response to Drought Stress in Apple ( Malus prunifolia (Willd.) Borkh). PLANTS (BASEL, SWITZERLAND) 2021; 11:plants11010103. [PMID: 35009106 PMCID: PMC8747461 DOI: 10.3390/plants11010103] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 05/26/2023]
Abstract
Drought stress is a significant environmental factor limiting crop growth worldwide. Malus prunifolia is an important apple species endemic to China and is used for apple cultivars and rootstocks with great drought tolerance. N6-methyladenosine (m6A) is a common epigenetic modification on messenger RNAs (mRNAs) in eukaryotes which is critical for various biological processes. However, there are no reports on m6A methylation in apple response to drought stress. Here, we assessed the m6A landscape of M. prunifolia seedlings in response to drought and analyzed the association between m6A modification and transcript expression. In total, we found 19,783 and 19,609 significant m6A peaks in the control and drought treatment groups, respectively, and discovered a UGUAH (H: A/U/C) motif. In M. prunifolia, under both control and drought conditions, peaks were highly enriched in the 3' untranslated region (UTR) and coding sequence (CDS). Among 4204 significant differential m6A peaks in drought-treated M. prunifolia compared to control-treated M. prunifolia, 4158 genes with m6A modification were identified. Interestingly, a large number of hypermethylated peaks (4069) were stimulated by drought treatment compared to hypomethylation. Among the hypermethylated peak-related genes, 972 and 1238 differentially expressed genes (DEGs) were up- and down-regulated in response to drought, respectively. Gene ontology (GO) analyses of differential m6A-modified genes revealed that GO slims related to RNA processing, epigenetic regulation, and stress tolerance were significantly enriched. The m6A modification landscape depicted in this study sheds light on the epigenetic regulation of M. prunifolia in response to drought stress and indicates new directions for the breeding of drought-tolerant apple trees.
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Affiliation(s)
- Xiushan Mao
- Shandong Transport Vocational College, 7369 Bohai Road, Weifang 261206, China;
| | - Nan Hou
- State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling, Xianyang 712100, China;
- Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Xianyang 712100, China
| | - Zhenzhong Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling, Xianyang 712100, China;
- Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Xianyang 712100, China
| | - Jieqiang He
- State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling, Xianyang 712100, China;
- Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Xianyang 712100, China
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11
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Wang Q, Huang D, Niu D, Deng J, Ma F, Liu C. Overexpression of auxin response gene MdIAA24 enhanced cadmium tolerance in apple (Malus domestica). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 225:112734. [PMID: 34482065 DOI: 10.1016/j.ecoenv.2021.112734] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 08/27/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
Cadmium (Cd), a phytotoxic heavy metal accumulated in plants and fruits, has significant adverse effects on plant growth and development as well as human health. In particular, Cd pollution has become a serious agricultural issue in recent years. Apple is one of the most popular fruits consumed at the global scale. Improving apple Cd resistance via reductions in Cd absorption can benefit apple tree growth and ensure fruit safety. In this study, we determined that, under the 200 μM Cd treatment, 35S::MdIAA24 apple plants exhibited more biomass and less Cd accumulation in the tested tissues compared to wild type (WT). Furthermore, the 35S::MdIAA24 apple plants demonstrated more favorable photosynthesis characteristics, less reactive oxygen species (ROS) and a greater amount of active antioxidant enzymes under the Cd condition than WT. The expression levels of the Cd uptake genes were observed to be lower in the 35S::MdIAA24 apple plants compared with those of the WT under the Cd treatment. The results highlight the ability of the overexpression of MdIAA24 to enhance apple Cd resistance by improving antioxidant capacity and reducing Cd absorption.
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Affiliation(s)
- Qian Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Dong Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Dongshan Niu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Jie Deng
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China.
| | - Changhai Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China.
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Liu C, Wang H, Zhang X, Ma F, Guo T, Li C. Activation of the ABA Signal Pathway Mediated by GABA Improves the Drought Resistance of Apple Seedlings. Int J Mol Sci 2021; 22:ijms222312676. [PMID: 34884481 PMCID: PMC8657939 DOI: 10.3390/ijms222312676] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 02/06/2023] Open
Abstract
Drought seriously affects the yield and quality of apples. γ-aminobutyric acid (GABA) plays an important role in the responses of plants to various stresses. However, the role and possible mechanism of GABA in the drought response of apple seedlings remain unknown. To explore the effect of GABA on apple seedlings under drought stress, seedlings of Malus hupehensis were treated with seven concentrations of GABA, and the response of seedlings under 15-day drought stress was observed. The results showed that 0.5 mM GABA was the most effective at relieving drought stress. Treatment with GABA reduced the relative electrical conductivity and MDA content of leaves induced by drought stress and significantly increased the relative water content of leaves. Exogenous GABA significantly decreased the stomatal conductance and intercellular carbon dioxide concentration and transpiration rate, and it significantly increased the photosynthetic rate under drought. GABA also reduced the accumulation of superoxide anions and hydrogen peroxide in leaf tissues under drought and increased the activities of POD, SOD, and CAT and the content of GABA. Exogenous treatment with GABA acted through the accumulation of abscisic acid (ABA) in the leaves to significantly decrease stomatal conductance and increase the stomatal closure rate, and the levels of expression of ABA-related genes PYL4, ABI1, ABI2, HAB1, ABF3, and OST1 changed in response to drought. Taken together, exogenous GABA can enhance the drought tolerance of apple seedlings.
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13
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Tremblay J, Goulet MC, Vorster J, Goulet C, Michaud D. Harnessing the functional diversity of plant cystatins to design inhibitor variants highly active against herbivorous arthropod digestive proteases. FEBS J 2021; 289:1827-1841. [PMID: 34799995 DOI: 10.1111/febs.16288] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/08/2021] [Accepted: 11/18/2021] [Indexed: 12/28/2022]
Abstract
Protein engineering approaches have been proposed to improve the inhibitory properties of plant cystatins against herbivorous arthropod digestive proteases, generally involving the site-directed mutagenesis of functionally relevant amino acids or the selection of improved inhibitor variants by phage display approaches. Here, we propose a novel approach where the function-related structural elements of a cystatin are substituted by the corresponding elements of an alternative cystatin. Inhibitory assays were first performed with 20 representative plant cystatins and model Cys proteases, including arthropod proteases, to appreciate the extent of functional variability among the plant cystatin family. The most, and less, potent of these cystatins were then used as 'donors' of structural elements to create hybrids of tomato cystatin SlCYS8 used as a model 'recipient' inhibitor. In brief, inhibitory activities against Cys proteases strongly differed from one plant cystatin to another, with Ki (papain) values diverging by more than 30-fold and inhibitory rates against arthropod proteases varying by up to 50-fold depending on the enzymes assessed. In line with theoretical assumptions from docking models generated for different Cys protease-cystatin combinations, structural element substitutions had a strong impact on the activity of recipient cystatin SlCYS8, positive or negative depending on the basic inhibitory potency of the donor cystatin. Our data confirm the wide variety of cystatin inhibitory profiles among plant taxa. They also demonstrate the usefulness of these proteins as a pool of discrete structural elements for the design of cystatin variants with improved potency against herbivorous pest digestive Cys proteases.
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Affiliation(s)
- Jonathan Tremblay
- Département de phytologie, Centre de recherche et d'innovation sur les végétaux, Université Laval, Québec, Québec, Canada
| | - Marie-Claire Goulet
- Département de phytologie, Centre de recherche et d'innovation sur les végétaux, Université Laval, Québec, Québec, Canada
| | - Juan Vorster
- Department of Plant and Soil Sciences, The University of Pretoria, Pretoria, South Africa
| | - Charles Goulet
- Département de phytologie, Centre de recherche et d'innovation sur les végétaux, Université Laval, Québec, Québec, Canada
| | - Dominique Michaud
- Département de phytologie, Centre de recherche et d'innovation sur les végétaux, Université Laval, Québec, Québec, Canada
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D'Ippólito S, Rey-Burusco MF, Feingold SE, Guevara MG. Role of proteases in the response of plants to drought. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 168:1-9. [PMID: 34607206 DOI: 10.1016/j.plaphy.2021.09.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/02/2021] [Accepted: 09/28/2021] [Indexed: 05/25/2023]
Abstract
Plants are sessile organisms that, to survive they develop response mechanisms under water deficit conditions. Plant proteases play an essential role in a diversity of biological processes, among them tolerance to drought stress. Proteolysis is a critical regulator of stomatal development. Plant proteases are involved in the crosstalk among phytohormones and adjustment of stomatal aperture. Plant proteases are also related to the increment in reactive oxygen species (ROS) production detected in the plant biochemical response to drought. Plant proteases mitigate this process by degrading damaged, denatured, and aggregated proteins, remobilizing amino acids, and generating molecules involved in signal transductions. Although many roles for proteases have been proposed, molecular bases that regulate these mechanisms remain unknown. In this review, we summarize the current knowledge on the participation of proteases in the signaling pathways of plants in response to water deficit and their relationship with plant stress tolerance.
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Affiliation(s)
- Sebastián D'Ippólito
- Biological Research Institute, National Council of Scientific and Technique Research (CONICET), University of Mar del Plata, Mar del Plata (UNMDP), Argentina
| | - María Florencia Rey-Burusco
- Agrobiotechnology Laboratory, National Institute of Agrotechnology (INTA) EEA - Balcarce, Route 226, Km 73.5. DC 276, (7620), Balcarce, Argentina
| | - Sergio Enrique Feingold
- Agrobiotechnology Laboratory, National Institute of Agrotechnology (INTA) EEA - Balcarce, Route 226, Km 73.5. DC 276, (7620), Balcarce, Argentina
| | - María Gabriela Guevara
- Biological Research Institute, National Council of Scientific and Technique Research (CONICET), University of Mar del Plata, Mar del Plata (UNMDP), Argentina.
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15
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Huang D, Wang Q, Jing G, Ma M, Li C, Ma F. Overexpression of MdIAA24 improves apple drought resistance by positively regulating strigolactone biosynthesis and mycorrhization. TREE PHYSIOLOGY 2021; 41:134-146. [PMID: 32856070 DOI: 10.1093/treephys/tpaa109] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/10/2020] [Accepted: 08/21/2020] [Indexed: 06/11/2023]
Abstract
Most land plant species have the ability to establish a symbiosis with arbuscular mycorrhizal (AM) fungi. These fungi penetrate into root cortical cells and form branched structures (known as arbuscules) for nutrient exchange. We cloned the MdIAA24 from apple (Malus domestica) following its up-regulation during AM symbiosis. Results demonstrate the positive impact of the overexpression (OE) of MdIAA24 in apple on AM colonization. We observed the strigolactone (SL) synthesis genes, including MdD27, MdCCD7, MdCCD8a, MdCCD8b and MdMAXa, to be up-regulated in the OE lines. Thus, the OE lines exhibited both a higher SL content and colonization rate. Furthermore, we observed that the OE lines were able to maintain better growth parameters under AM inoculation conditions. Under drought stress with the AM inoculation, the OE lines were less damaged, which was demonstrated by a higher relative water content, a lower relative electrolytic leakage, a greater osmotic adjustment, a higher reactive oxygen species scavenging ability, an improved gas exchange capacity and an increased chlorophyll fluorescence performance. Our findings demonstrate that the OE of MdIAA24 in apple positively regulates the synthesis of SL and the formation of arbuscules as a drought stress coping mechanism.
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Affiliation(s)
- Dong Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, No.3 Taicheng Road, Yangling 712100 Shaanxi, China
| | - Qian Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, No.3 Taicheng Road, Yangling 712100 Shaanxi, China
| | - Guangquan Jing
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, No.3 Taicheng Road, Yangling 712100 Shaanxi, China
| | - Mengnan Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, No.3 Taicheng Road, Yangling 712100 Shaanxi, China
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, No.3 Taicheng Road, Yangling 712100 Shaanxi, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, No.3 Taicheng Road, Yangling 712100 Shaanxi, China
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16
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Dong Q, Zheng W, Duan D, Huang D, Wang Q, Liu C, Li C, Gong X, Li C, Mao K, Ma F. MdWRKY30, a group IIa WRKY gene from apple, confers tolerance to salinity and osmotic stresses in transgenic apple callus and Arabidopsis seedlings. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 299:110611. [PMID: 32900448 DOI: 10.1016/j.plantsci.2020.110611] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 05/28/2023]
Abstract
Abiotic stresses threaten the productivity and quality of economically important perennial fruit crops such as apple (Malus × domestica Borkh.). WRKY transcription factors play various roles in plant responses to abiotic stress, but little is known regarding WRKY genes in apple. Here, we carried out functional characterization of an apple Group IIa WRKY gene (MdWRKY30). qRT-PCR analysis found that MdWRKY30 expression was induced by salt and drought stress. A subcellular localization assay showed that MdWRKY30 is localized to the nucleus. A transactivation assay found that MdWRKY30 has no transcriptional activation activity. A Y2H assay indicated that MdWRKY26, MdWRKY28, and MdWRKY30 interact with each other to form heterodimers and homodimers. Transgenic analysis revealed that the overexpression of MdWRKY30 in Arabidopsis enhanced salt and osmotic tolerance in the seedling stage, as well as during the seed germination and greening cotyledon stages. MdWRKY30 overexpression enhanced tolerance to salt and osmotic stresses in transgenic apple callus through transcriptional regulation of stress-related genes. Together, our results demonstrate that MdWRKY30 is an important regulator of salinity and osmotic stress tolerance in apple.
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Affiliation(s)
- Qinglong Dong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Wenqian Zheng
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Dingyue Duan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Dong Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Qian Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Changhai Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Xiaoqing Gong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Cuiying Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Ke Mao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China.
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17
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The Impact of Drought in Plant Metabolism: How to Exploit Tolerance Mechanisms to Increase Crop Production. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10165692] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Plants are often exposed to unfavorable environmental conditions, for instance abiotic stresses, which dramatically alter distribution of plant species among ecological niches and limit the yields of crop species. Among these, drought stress is one of the most impacting factors which alter seriously the plant physiology, finally leading to the decline of the crop productivity. Drought stress causes in plants a set of morpho-anatomical, physiological and biochemical changes, mainly addressed to limit the loss of water by transpiration with the attempt to increase the plant water use efficiency. The stomata closure, one of the first consistent reactions observed under drought, results in a series of consequent physiological/biochemical adjustments aimed at balancing the photosynthetic process as well as at enhancing the plant defense barriers against drought-promoted stress (e.g., stimulation of antioxidant systems, accumulation of osmolytes and stimulation of aquaporin synthesis), all representing an attempt by the plant to overcome the unfavorable period of limited water availability. In view of the severe changes in water availability imposed by climate change factors and considering the increasing human population, it is therefore of outmost importance to highlight: (i) how plants react to drought; (ii) the mechanisms of tolerance exhibited by some species/cultivars; and (iii) the techniques aimed at increasing the tolerance of crop species against limited water availability. All these aspects are necessary to respond to the continuously increasing demand for food, which unfortunately parallels the loss of arable land due to changes in rainfall dynamics and prolonged period of drought provoked by climate change factors. This review summarizes the most updated findings on the impact of drought stress on plant morphological, biochemical and physiological features and highlights plant mechanisms of tolerance which could be exploited to increase the plant capability to survive under limited water availability. In addition, possible applicative strategies to help the plant in counteracting unfavorable drought periods are also discussed.
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18
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Lima AM, Barros NLF, Freitas ACO, Tavares LSC, Pirovani CP, Siqueira AS, Gonçalves EC, de Souza CRB. A new Piper nigrum cysteine proteinase inhibitor, PnCPI, with antifungal activity: molecular cloning, recombinant expression, functional analyses and molecular modeling. PLANTA 2020; 252:16. [PMID: 32661769 DOI: 10.1007/s00425-020-03425-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
A new Piper nigrum cysteine proteinase inhibitor, PnCPI, belonging to group I of phytocystatins, with inhibitory activity against papain and growth of Fusarium solani f. sp. piperis, was isolated and characterized. Previous studies (de Souza et al. 2011) have identified a partial cDNA sequence of putative cysteine proteinase inhibitor differentially expressed in roots of black pepper (P. nigrum L.) infected by F. solani f. sp. piperis. Here, we aimed to isolate the full-length cDNA and genomic sequences of the P. nigrum cysteine proteinase inhibitor gene, named PnCPI. Sequence analyses showed that the PnCPI gene encodes a deduced protein of 108 amino acid residues with a predicted molecular mass of 12.3 kDa and isoelectric point of 6.51. Besides the LARFAV-like sequence, common to all phytocystatins, PnCPI contains three conserved motifs of the superfamily cystatin: a glycine residue at the N-terminal region, the QxVxG reactive site more centrally positioned, and one tryptophan in the C-terminal region. PnCPI, belonging to group I of phytocystatins, showed high identity with cystatins isolated from several plant species. Sequence analyses also revealed no putative signal peptide at the N-terminal of PnCPI, as well as no introns within the genomic sequence corresponding to the PnCPI coding region. Molecular modeling showed the ability of PnCPI to interact with papain, while its inhibitory activity against this protease was confirmed after heterologous expression in Escherichia coli. The effects of heat treatments on the inhibitory activity of recombinant PnCPI, rPnCPI, were evaluated. In addition, rPnCPI exhibited in vitro activity against F. solani f. sp. piperis, revealing a new cystatin with the potential antifungal application. The identification of PnCPI as a functional cystatin able to inhibit the in vitro growth of F. solani f. sp. piperis indicates other factors contributing to in vivo susceptibility of black pepper to root rot disease.
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Affiliation(s)
- Aline Medeiros Lima
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
- Universidade Federal Rural da Amazônia, Tomé-Açu, PA, 68680-000, Brazil
| | - Nicolle Louise Ferreira Barros
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
- Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
| | - Ana Camila Oliveira Freitas
- Laboratório de Proteômica, Centro de Biotecnologia e Genética, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, Ilhéus, BA, 45662-900, Brazil
| | | | - Carlos Priminho Pirovani
- Laboratório de Proteômica, Centro de Biotecnologia e Genética, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, Ilhéus, BA, 45662-900, Brazil
| | - Andrei Santos Siqueira
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, 66075-110, Brazil
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Huang D, Ma M, Wang Q, Zhang M, Jing G, Li C, Ma F. Arbuscular mycorrhizal fungi enhanced drought resistance in apple by regulating genes in the MAPK pathway. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 149:245-255. [PMID: 32087536 DOI: 10.1016/j.plaphy.2020.02.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/13/2020] [Accepted: 02/14/2020] [Indexed: 05/19/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) can form a symbiotic relationships with most terrestrial plants and play an important role in plant growth and adaptation to various stresses. To study the role of AMF in regulating drought resistance in apple, the effects of drought stress on Malus hupehensis inoculated with AMF were investigated. Inoculation of AMF enhanced apple plants growth. Mycorrhizal plants had higher total chlorophyll concentrations but lower relative electrolyte leakage under drought stress. Mycorrhizal plants increased net photosynthetic rate, stomatal conductance, and transpiration rate under drought stress, however, they showed lower inhibition in the quantum yield of PSII photochemistry. Mycorrhizal plants also had higher superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) enzyme activities under drought conditions. Thus, mycorrhizal plants had lower accumulated MDA, H2O2, and O2- than non-mycorrhizal seedlings. Total sugar and proline concentrations also significantly increased, helping maintain the osmotic balance. Furthermore, mitogen-activated protein kinase (MAPK) cascades, which participate in the regulation of responses of plants and microorganisms to biotic and abiotic stress, were up-regulated in apple plants and AMF during drought. We saw that there were at least two motifs that were identical in MAPK proteins and many elements that responded to hormones and stress from these MAPK genes. In summary, our results showed that mycorrhizal colonization enhanced apple drought tolerance by improving gas exchange capacity, increasing chlorophyll fluorescence parameters, creating a greater osmotic adjustment capacity, increasing scavenging of reactive oxygen species (ROS), and using MAPK signals for interactions between AMF and their apple plant hosts.
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Affiliation(s)
- Dong Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Mengnan Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Qian Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Maoxue Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Guangquan Jing
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Fanourakis D, Nikoloudakis N, Pappi P, Markakis E, Doupis G, Charova SN, Delis C, Tsaniklidis G. The Role of Proteases in Determining Stomatal Development and Tuning Pore Aperture: A Review. PLANTS (BASEL, SWITZERLAND) 2020; 9:E340. [PMID: 32182645 PMCID: PMC7154916 DOI: 10.3390/plants9030340] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 12/16/2022]
Abstract
Plant proteases, the proteolytic enzymes that catalyze protein breakdown and recycling, play an essential role in a variety of biological processes including stomatal development and distribution, as well as, systemic stress responses. In this review, we summarize what is known about the participation of proteases in both stomatal organogenesis and on the stomatal pore aperture tuning, with particular emphasis on their involvement in numerous signaling pathways triggered by abiotic and biotic stressors. There is a compelling body of evidence demonstrating that several proteases are directly or indirectly implicated in the process of stomatal development, affecting stomatal index, density, spacing, as well as, size. In addition, proteases are reported to be involved in a transient adjustment of stomatal aperture, thus orchestrating gas exchange. Consequently, the proteases-mediated regulation of stomatal movements considerably affects plants' ability to cope not only with abiotic stressors, but also to perceive and respond to biotic stimuli. Even though the determining role of proteases on stomatal development and functioning is just beginning to unfold, our understanding of the underlying processes and cellular mechanisms still remains far from being completed.
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Affiliation(s)
- Dimitrios Fanourakis
- Department of Agriculture, School of Agricultural Sciences, Hellenic Mediterranean University, Estavromenos, Heraklion, 71500 Crete, Greece;
- Giannakakis SA, Export Fruits and Vegetables, Tympaki, 70200 Crete, Greece
| | - Nikolaos Nikoloudakis
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, 3036 Limassol, Cyprus;
| | - Polyxeni Pappi
- Hellenic Agricultural Organization—‘Demeter’, Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, 71307 Crete, Greece; (P.P.); (E.M.); (G.D.)
| | - Emmanouil Markakis
- Hellenic Agricultural Organization—‘Demeter’, Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, 71307 Crete, Greece; (P.P.); (E.M.); (G.D.)
| | - Georgios Doupis
- Hellenic Agricultural Organization—‘Demeter’, Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, 71307 Crete, Greece; (P.P.); (E.M.); (G.D.)
| | - Spyridoula N. Charova
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Development, Heraklion, 70013 Crete, Greece;
- Department of Biology, University of Crete, Heraklion, 70013 Crete, Greece
| | - Costas Delis
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece;
| | - Georgios Tsaniklidis
- Hellenic Agricultural Organization—‘Demeter’, Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, 71307 Crete, Greece; (P.P.); (E.M.); (G.D.)
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Ghafari H, Hassanpour H, Jafari M, Besharat S. Physiological, biochemical and gene-expressional responses to water deficit in apple subjected to partial root-zone drying (PRD). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 148:333-346. [PMID: 32004917 DOI: 10.1016/j.plaphy.2020.01.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 01/07/2020] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
Water scarcity is one of the major factors limiting apple production. Partial root-zone drying (PRD) is a water-saving irrigation technique necessary to improve the efficiency of irrigation techniques to optimize the amount of fruit produced with the volume of water used. The apple trees cv. Red Delicious were exposed to four treatments, including (1) control with 100% of the crop evapotranspiration (ETc) needs; (2) alternate partial root-zone drying with 75% of the ETc needs (APRD75); (3) fixed partial root-zone drying with 75% of the ETc needs (FPRD75); (4) fixed partial root-zone irrigation with 50% of the ETc needs (FPRD50) in a semiarid region of Iran. Results showed that leaf water potential (Ψ leaf), and chlorophyll were significantly decreased in FPRD50 compared to control and other PRD treatments. APRD75 and FPRD75 treatments significantly enhanced (+) -catechin (+C), epicatechin (EC), chlorogenic acid (CGA), caffeic acid (CA) as well as increased water use efficiency (WUE) (by 30-40% compared to control) without significant reduction of yield. PRD reduced gibberellic acid (GA3) and kinetin, while, increased the abscisic acid (ABA) and salicylic acid (SA) levels. The abiotic stress-responsive transcription factors (TFs) MdoMYB121, MdoMYB155, MdbZIP2, and MdbZIP48 were highly expressed in all PRD treatments. Our results demonstrated that APRD75 and FPRD75 have the potential to stimulate antioxidant defense mechanisms, hormonal signaling pathways, and expression of drought-tolerance TFs to improve WUE while maintaining crop yield. Therefore, APRD75andFPRD75 with water savings as compared to full irrigation might be a suitable strategy for irrigation apple trees under water scarcity.
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Affiliation(s)
- Hajar Ghafari
- Department of Horticultural Sciences, Faculty of Agricultural Sciences, Urmia University, Urmia, Iran
| | - Hamid Hassanpour
- Department of Horticultural Sciences, Faculty of Agricultural Sciences, Urmia University, Urmia, Iran.
| | - Morad Jafari
- Department of Plant Breeding and Biotechnology, Faculty of Agricultural Sciences, Urmia University, Urmia, Iran
| | - Sina Besharat
- Department of Water Engineering, Faculty of Agricultural Sciences, Urmia University, Urmia, Iran
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Qi T, Guo J, Liu P, He F, Wan C, Islam MA, Tyler BM, Kang Z, Guo J. Stripe Rust Effector PstGSRE1 Disrupts Nuclear Localization of ROS-Promoting Transcription Factor TaLOL2 to Defeat ROS-Induced Defense in Wheat. MOLECULAR PLANT 2019; 12:1624-1638. [PMID: 31606466 DOI: 10.1016/j.molp.2019.09.010] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 09/29/2019] [Accepted: 09/29/2019] [Indexed: 05/27/2023]
Abstract
Puccinia striiformis f. sp. tritici (Pst), a biotrophic plant pathogen, secretes numerous effectors to modulate host defense systems. Understanding the molecular mechanisms by which Pst effectors regulate wheat immunity is of great importance for the development of novel strategies for durable control of stripe rust. In this study, we identified a glycine-serine-rich effector gene, PstGSRE1, which is highly induced during early infection. Transgenic expression of PstGSRE1 RNAi constructs in wheat significantly reduced virulence of Pst and increased H2O2 accumulation in wheat. PstGSRE1 was shown to target the reactive oxygen species (ROS)-associated transcription factor TaLOL2, a positive regulator of wheat immunity. PstGSRE1 disrupted nuclear localization of TaLOL2 and suppressed ROS-mediated cell death induced by TaLOL2, thus compromising host immunity. This work reveals a previously unrecognized strategy whereby rust fungi exploit the PstGSRE1 effector to defeat ROS-associated plant defense by modulating the subcellular compartment of a host immune regulator and facilitate pathogen infection.
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Affiliation(s)
- Tuo Qi
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Jia Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Peng Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Fuxin He
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Cuiping Wan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Md Ashraful Islam
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Brett M Tyler
- Center for Genome Research and Biocomputing, Oregon State University, Corvallis, OR, USA
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China.
| | - Jun Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China.
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Huang D, Wang Q, Duan D, Dong Q, Zhao S, Zhang M, Jing G, Liu C, van Nocker S, Ma F, Li C. Overexpression of MdIAA9 confers high tolerance to osmotic stress in transgenic tobacco. PeerJ 2019; 7:e7935. [PMID: 31687272 PMCID: PMC6825743 DOI: 10.7717/peerj.7935] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 09/23/2019] [Indexed: 11/20/2022] Open
Abstract
Auxin is a plant hormone that takes part in a series of developmental and physiological processes. There are three major gene families that play a role in the early response of auxin and auxin/indole-3-acetic acid (Aux/IAA) is one of these. Although the genomic organization and function of Aux/IAA genes have been recognized in reference plants there have only been a few focused studies conducted with non-model crop plants, especially in the woody perennial species. We conducted a genomic census and expression analysis of Aux/IAA genes in the cultivated apple (Malus × domestica Borkh.). The Aux/IAA gene family of the apple genome was identified and analyzed in this study. Phylogenetic analysis showed that MdIAAs could be categorized into nine subfamilies and that these MdIAA proteins contained four whole or partially conserved domains of the MdIAA family. The spatio-specific expression profiles showed that most of the MdIAAs were preferentially expressed in specific tissues. Some of these genes were significantly induced by treatments with one or more abiotic stresses. The overexpression of MdIAA9 in tobacco (Nicotiana tabacum L.) plants significantly increased their tolerance to osmotic stresses. Our cumulative data supports the interactions between abiotic stresses and plant hormones and provides a theoretical basis for the mechanism of Aux/IAA and drought resistance in apples.
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Affiliation(s)
- Dong Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Qian Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Dingyue Duan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Qinglong Dong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Shuang Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Maoxue Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Guangquan Jing
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Changhai Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Steve van Nocker
- Department of Horticulture, Michigan State University, East Lansing, MI, USA
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, Shaanxi, China
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Abstract
Dozens of studies have assessed the practical value of plant cystatins as ectopic inhibitors of Cys proteases in biological systems. The potential of these proteins in crop protection to control herbivorous pests and pathogens has been documented extensively over the past 25 years. Their usefulness to regulate endogenous Cys proteases in planta has also been considered recently, notably to implement novel traits of agronomic relevance in crops or to generate protease activity-depleted environments in plants or plant cells used as bioreactors for recombinant proteins. After a brief update on the basic structural characteristics of plant cystatins, we summarize recent advances on the use of these proteins in plant biotechnology. Attention is also paid to the molecular improvement of their structural properties for the improvement of their protease inhibitory effects or the fine-tuning of their biological target range.
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25
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Gomez-Sanchez A, Gonzalez-Melendi P, Santamaria ME, Arbona V, Lopez-Gonzalvez A, Garcia A, Hensel G, Kumlehn J, Martinez M, Diaz I. Repression of drought-induced cysteine-protease genes alters barley leaf structure and responses to abiotic and biotic stresses. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2143-2155. [PMID: 30452688 DOI: 10.1093/jxb/ery410] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/08/2018] [Indexed: 05/23/2023]
Abstract
To survive under water deficiency, plants alter gene expression patterns, make structural and physiological adjustments, and optimize the use of water. Rapid degradation and turnover of proteins is required for effective nutrient recycling. Here, we examined the transcriptional responses of the C1A cysteine protease family to drought in barley and found that four genes were up-regulated in stressed plants. Knock-down lines for the protease-encoding genes HvPap-1 and HvPap-19 showed unexpected changes in leaf cuticle thickness and stomatal pore area. The efficiency of photosystem II and the total amount of proteins were almost unaltered in stressed transgenic plants while both parameters decreased in stressed wild-type plants. Although the patterns of proteolytic activities in the knock-down lines did not change, the amino acid accumulation increased in response to drought, concomitant with a higher ABA content. Whilst jasmonic acid (JA) and JA-Ile concentrations increased in stressed leaves of the wild-type and the HvPap-1 knock-down lines, their levels were lower in the HvPap-19 knock-down lines, suggesting the involvement of a specific hormone interaction in the process. Our data indicate that the changes in leaf cuticle thickness and stomatal pore area had advantageous effects on leaf defense against fungal infection and mite feeding mediated by Magnaporthe oryzae and Tetranychus urticae, respectively.
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Affiliation(s)
- Andrea Gomez-Sanchez
- Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA). Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA). Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
| | - Pablo Gonzalez-Melendi
- Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA). Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA). Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
- Departamento de Biotecnología y Biología Vegetal - Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, UPM, Avda. Complutense, Madrid, Spain
| | - M Estrella Santamaria
- Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA). Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA). Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
- Departamento de Biotecnología y Biología Vegetal - Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, UPM, Avda. Complutense, Madrid, Spain
| | - Vicente Arbona
- Ecofisiologia i Biotecnologia, Dpt. Ciències Agràries i del Medi Natural, Universitat Jaume I - Campus Riu Sec, Castelló de la Plana, Spain
| | - Angeles Lopez-Gonzalvez
- Centre for Metabolomics and Bioanalysis, Facultad de Farmacia, Universidad CEU San Pablo, Campus Monteprincipe, Boadilla del Monte, Madrid, Spain
| | - Antonia Garcia
- Centre for Metabolomics and Bioanalysis, Facultad de Farmacia, Universidad CEU San Pablo, Campus Monteprincipe, Boadilla del Monte, Madrid, Spain
| | - Goetz Hensel
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Gatersleben, Germany
| | - Jochen Kumlehn
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Gatersleben, Germany
| | - Manuel Martinez
- Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA). Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA). Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
- Departamento de Biotecnología y Biología Vegetal - Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, UPM, Avda. Complutense, Madrid, Spain
| | - Isabel Diaz
- Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA). Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA). Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
- Departamento de Biotecnología y Biología Vegetal - Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, UPM, Avda. Complutense, Madrid, Spain
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Guo T, Wang N, Xue Y, Guan Q, van Nocker S, Liu C, Ma F. Overexpression of the RNA binding protein MhYTP1 in transgenic apple enhances drought tolerance and WUE by improving ABA level under drought condition. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 280:397-407. [PMID: 30824018 DOI: 10.1016/j.plantsci.2018.11.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 11/05/2018] [Accepted: 11/26/2018] [Indexed: 05/08/2023]
Abstract
MhYTP1 is involved in post-transcriptional regulation as a member of YT521-homology (YTH) domain-containing RNA-binding proteins. We previously cloned MhYTP1 and found it participated in various biotic and abiotic stress responses. However, its function in long-term moderate drought has not been verified. Thus, we explored its biological role in response to drought. Under drought condition, the net photosynthesis rate (Pn) and water use efficiency (WUE) were significantly elevated in MhYTP1-overexpressing (OE) apple plants when compared with the non-transgenic (NT) controls. Further analysis indicated MhYTP1 expression was associated with elevated ABA content, increased stomatal density and reduced stomatal aperture. In addition, to gain insight into the function of stem-specific expression of MhYTP1, grafting experiments were performed. Interestingly, lower transpiration rate (Tr) and higher WUE were observed when transgenic plants were used as scions as opposed to rootstocks and when transgenic rather than NT plants were used as rootstocks, indicating MhYTP1 plays crucial roles in grafted plants. These results define a function for MhYTP1 in promoting tolerance to drought conditions, and suggest that MhYTP1 can serve as a candidate gene for future apple drought resistance breeding with the help of biotechnology.
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Affiliation(s)
- Tianli Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Na Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yangchun Xue
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qingmei Guan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Steven van Nocker
- Department of Horticulture, Michigan State University, East Lansing, MI, USA
| | - Changhai Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China.
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Sharma V, Goel P, Kumar S, Singh AK. An apple transcription factor, MdDREB76, confers salt and drought tolerance in transgenic tobacco by activating the expression of stress-responsive genes. PLANT CELL REPORTS 2019; 38:221-241. [PMID: 30511183 DOI: 10.1007/s00299-018-2364-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
KEY MESSAGE An apple gene, MdDREB76 encodes a functional transcription factor and imparts salinity and drought stress endurance to transgenic tobacco by activating expression of stress-responsive genes. The dehydration-responsive element (DRE)-binding protein (DREB) transcription factors are well known to be involved in regulating abiotic stress-mediated gene expression in plants. In this study, MdDREB76 gene was isolated from apple (Malus x domestica), which encodes a functional transcription factor protein. Overexpression of MdDREB76 in tobacco conferred salt and drought stress tolerance to transgenic lines by inducing antioxidant enzymes, such as superoxide dismutase, ascorbate peroxidase and catalase. The higher membrane stability index, relative water content, proline, total soluble sugar content and lesser H2O2content, electrolyte leakage and lipid peroxidation in transgenics support the improved physiological status of transgenic plants as compared to WT plants under salinity and drought stresses. The MdDREB76 overexpression upregulated the expression of stress-responsive genes that provide salinity and drought stress endurance to the plants. Compared to WT plants, transgenic lines exhibited healthy growth and higher yield under stress conditions. The present study reports MdDREB76 as a key regulator that switches on the battery of downstream genes which impart salt and osmotic stress endurance to the transgenic plants and can be used for genetic engineering of crop plants to combat salinity and drought stresses.
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Affiliation(s)
- Vishal Sharma
- Department of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176 061, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Parul Goel
- Department of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176 061, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Sanjay Kumar
- Department of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176 061, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Anil Kumar Singh
- Department of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176 061, India.
- Academy of Scientific and Innovative Research, New Delhi, India.
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, 834 010, India.
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Velasco-Arroyo B, Martinez M, Diaz I, Diaz-Mendoza M. Differential response of silencing HvIcy2 barley plants against Magnaporthe oryzae infection and light deprivation. BMC PLANT BIOLOGY 2018; 18:337. [PMID: 30522452 PMCID: PMC6282322 DOI: 10.1186/s12870-018-1560-6] [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: 07/16/2018] [Accepted: 11/22/2018] [Indexed: 05/12/2023]
Abstract
BACKGROUND Phytocystatins (PhyCys) act as endogenous regulators of cysteine proteases (CysProt) involved in various physiological processes. Besides, PhyCys are involved in plant reactions to abiotic stresses like drought or darkness and have been used as effective molecules against different pests and pathogens. The barley PhyCys-CysProt system is considered a model of protease-inhibitor regulation of protein turnover. Thirteen barley cystatins (HvCPI-1 to HvCPI-13) have been previously identified and characterized. Among them HvCPI-2 has been shown to have a relevant role in plant responses to pathogens and pests, as well as in the plant response to drought. RESULTS The present work explores the multiple role of this barley PhyCys in response to both, biotic and abiotic stresses, focusing on the impact of silencing this gene. HvIcy-2 silencing lines behave differentially against the phytopathogenic fungus Magnaporthe oryzae and a light deprivation treatment. The induced expression of HvIcy-2 by the fungal stress correlated to a higher susceptibility of silencing HvIcy-2 plants. In contrast, a reduction in the expression of HvIcy-2 and in the cathepsin-L and -B like activities in the silencing HvIcy-2 plants was not accompanied by apparent phenotypical differences with control plants in response to light deprivation. CONCLUSION These results highlight the specificity of PhyCys in the responses to diverse external prompts as well as the complexity of the regulatory events leading to the response to a particular stress. The mechanism of regulation of these stress responses seems to be focused in maintaining the balance of CysProt and PhyCys levels, which is crucial for the modulation of physiological processes induced by biotic or abiotic stresses.
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Affiliation(s)
- Blanca Velasco-Arroyo
- Centro de Biotecnologia y Genomica de Plantas (CBGP, UPM-INIA), Universidad Politecnica de Madrid (UPM) - Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223 Madrid, Pozuelo de Alarcon Spain
| | - Manuel Martinez
- Centro de Biotecnologia y Genomica de Plantas (CBGP, UPM-INIA), Universidad Politecnica de Madrid (UPM) - Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223 Madrid, Pozuelo de Alarcon Spain
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain
| | - Isabel Diaz
- Centro de Biotecnologia y Genomica de Plantas (CBGP, UPM-INIA), Universidad Politecnica de Madrid (UPM) - Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223 Madrid, Pozuelo de Alarcon Spain
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain
| | - Mercedes Diaz-Mendoza
- Centro de Biotecnologia y Genomica de Plantas (CBGP, UPM-INIA), Universidad Politecnica de Madrid (UPM) - Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223 Madrid, Pozuelo de Alarcon Spain
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Moon KB, Ahn DJ, Park JS, Jung WY, Cho HS, Kim HR, Jeon JH, Park YI, Kim HS. Transcriptome Profiling and Characterization of Drought-Tolerant Potato Plant ( Solanum tuberosum L.). Mol Cells 2018; 41:979-992. [PMID: 30396236 PMCID: PMC6277564 DOI: 10.14348/molcells.2018.0312] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/13/2018] [Accepted: 09/18/2018] [Indexed: 01/25/2023] Open
Abstract
Potato (Solanum tuberosum L.) is the third most important food crop, and breeding drought-tolerant varieties is vital research goal. However, detailed molecular mechanisms in response to drought stress in potatoes are not well known. In this study, we developed EMS-mutagenized potatoes that showed significant tolerance to drought stress compared to the wild-type (WT) 'Desiree' cultivar. In addition, changes to transcripts as a result of drought stress in WT and drought-tolerant (DR) plants were investigated by de novo assembly using the Illumina platform. One-week-old WT and DR plants were treated with -1.8 Mpa polyethylene glycol-8000, and total RNA was prepared from plants harvested at 0, 6, 12, 24, and 48 h for subsequent RNA sequencing. In total, 61,100 transcripts and 5,118 differentially expressed genes (DEGs) displaying up- or down-regulation were identified in pairwise comparisons of WT and DR plants following drought conditions. Transcriptome profiling showed the number of DEGs with up-regulation and down-regulation at 909, 977, 1181, 1225 and 826 between WT and DR plants at 0, 6, 12, 24, and 48 h, respectively. Results of KEGG enrichment showed that the drought tolerance mechanism of the DR plant can mainly be explained by two aspects, the 'photosynthetic-antenna protein' and 'protein processing of the endoplasmic reticulum'. We also divided eight expression patterns in four pairwise comparisons of DR plants (DR0 vs DR6, DR12, DR24, DR48) under PEG treatment. Our comprehensive transcriptome data will further enhance our understanding of the mechanisms regulating drought tolerance in tetraploid potato cultivars.
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Affiliation(s)
- Ki-Beom Moon
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
- Department of Biological Sciences, Chungnam National University, Daejeon,
Korea
| | - Dong-Joo Ahn
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
| | - Ji-Sun Park
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
| | - Won Yong Jung
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
| | - Hye Sun Cho
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
| | - Hye-Ran Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
| | - Jae-Heung Jeon
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
| | - Youn-il Park
- Department of Biological Sciences, Chungnam National University, Daejeon,
Korea
| | - Hyun-Soon Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon,
Korea
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Genome-Wide Analysis and Cloning of the Apple Stress-Associated Protein Gene Family Reveals MdSAP15, Which Confers Tolerance to Drought and Osmotic Stresses in Transgenic Arabidopsis. Int J Mol Sci 2018; 19:ijms19092478. [PMID: 30134640 PMCID: PMC6164895 DOI: 10.3390/ijms19092478] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 08/13/2018] [Accepted: 08/13/2018] [Indexed: 12/29/2022] Open
Abstract
Stress-associated proteins (SAPs) are novel A20/AN1 zinc finger domain-containing proteins that are now favorable targets to improve abiotic stress tolerance in plants. However, the SAP gene family and their biological functions have not been identified in the important fruit crop apple (Malus × domestica Borkh.). We conducted a genome-wide analysis and cloning of this gene family in apple and determined that the overexpression of MdSAP15 enhances drought tolerance in Arabidopsis plants. We identified 30 SAP genes in the apple genome. Phylogenetic analysis revealed two major groups within that family. Results from sequence alignments and analyses of 3D structures, phylogenetics, genomics structure, and conserved domains indicated that apple SAPs are highly and structurally conserved. Comprehensive qRT-PCR analysis found various expression patterns for MdSAPs in different tissues and in response to a water deficit. A transgenic analysis showed that the overexpression of MdSAP15 in transgenic Arabidopsis plants markedly enhanced their tolerance to osmotic and drought stresses. Our results demonstrate that the SAP genes are highly conserved in plant species, and that MdSAP15 can be used as a target gene in genetic engineering approaches to improve drought tolerance.
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Velasco-Arroyo B, Diaz-Mendoza M, Gomez-Sanchez A, Moreno-Garcia B, Santamaria ME, Torija-Bonilla M, Hensel G, Kumlehn J, Martinez M, Diaz I. Silencing barley cystatins HvCPI-2 and HvCPI-4 specifically modifies leaf responses to drought stress. PLANT, CELL & ENVIRONMENT 2018; 41:1776-1790. [PMID: 29486055 DOI: 10.1111/pce.13178] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/19/2018] [Accepted: 02/03/2018] [Indexed: 06/08/2023]
Abstract
Protein breakdown and mobilization are some of the major metabolic features associated with abiotic stresses, essential for nutrient recycling and plant survival. Genetic manipulation of protease and/or protease inhibitors may contribute to modulate proteolytic processes and plant responses. The expression analysis of the whole cystatin family, inhibitors of C1A cysteine proteases, after water deprivation in barley leaves highlighted the involvement of Icy-2 and Icy-4 cystatin genes. Artificial microRNA lines independently silencing the two drought-induced cystatins were generated to assess their function in planta. Phenotype alterations at the final stages of the plant life cycle are represented by the stay-green phenotype of silenced cystatin 2 lines. Besides, the enhanced tolerance to drought and differential responses to water deprivation at the initial growing stages are observed. The mutual compensating expression of Icy-2 and Icy-4 genes in the silencing lines pointed to their cooperative role. Proteolytic patterns by silencing these cystatins were concomitant with modifications in the expression of potential target proteases, in particular, HvPap-1, HvPap-12, and HvPap-16 C1A proteases. Metabolomics analysis lines also revealed specific modifications in the accumulation of several metabolites. These findings support the use of plants with altered proteolytic regulation in crop improvement in the face of climate change.
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Affiliation(s)
- Blanca Velasco-Arroyo
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Mercedes Diaz-Mendoza
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Andrea Gomez-Sanchez
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Beatriz Moreno-Garcia
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Maria Estrella Santamaria
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Miguel Torija-Bonilla
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Goetz Hensel
- Leibniz Institut fur Pflanzengenetik und Kulturpflanzenforschung (IPK) Gatersleben, Corrensstrasse 3, Stadt Seeland, 06466, Germany
| | - Jochen Kumlehn
- Leibniz Institut fur Pflanzengenetik und Kulturpflanzenforschung (IPK) Gatersleben, Corrensstrasse 3, Stadt Seeland, 06466, Germany
| | - Manuel Martinez
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
| | - Isabel Diaz
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, 28223, Pozuelo de Alarcon, Madrid, Spain
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32
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Yang Y, Luang S, Harris J, Riboni M, Li Y, Bazanova N, Hrmova M, Haefele S, Kovalchuk N, Lopato S. Overexpression of the class I homeodomain transcription factor TaHDZipI-5 increases drought and frost tolerance in transgenic wheat. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1227-1240. [PMID: 29193733 PMCID: PMC5978581 DOI: 10.1111/pbi.12865] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 10/29/2017] [Accepted: 11/12/2017] [Indexed: 05/20/2023]
Abstract
Characterization of the function of stress-related genes helps to understand the mechanisms of plant responses to environmental conditions. The findings of this work defined the role of the wheat TaHDZipI-5 gene, encoding a stress-responsive homeodomain-leucine zipper class I (HD-Zip I) transcription factor, during the development of plant tolerance to frost and drought. Strong induction of TaHDZipI-5 expression by low temperatures, and the elevated TaHDZipI-5 levels of expression in flowers and early developing grains in the absence of stress, suggests that TaHDZipI-5 is involved in the regulation of frost tolerance at flowering. The TaHDZipI-5 protein behaved as an activator in a yeast transactivation assay, and the TaHDZipI-5 activation domain was localized to its C-terminus. The TaHDZipI-5 protein homo- and hetero-dimerizes with related TaHDZipI-3, and differences between DNA interactions in both dimers were specified at 3D molecular levels. The constitutive overexpression of TaHDZipI-5 in bread wheat significantly enhanced frost and drought tolerance of transgenic wheat lines with the appearance of undesired phenotypic features, which included a reduced plant size and biomass, delayed flowering and a grain yield decrease. An attempt to improve the phenotype of transgenic wheat by the application of stress-inducible promoters with contrasting properties did not lead to the elimination of undesired phenotype, apparently due to strict spatial requirements for TaHDZipI-5 overexpression.
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Affiliation(s)
- Yunfei Yang
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
| | - Sukanya Luang
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
- Present address:
Institute of Molecular BiosciencesMahidol UniversityNakhon‐PathomThailand
| | - John Harris
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
- Present address:
South Australian Research and Development InstituteGPO Box 397AdelaideSA5064Australia
| | - Matteo Riboni
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
| | - Yuan Li
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
| | - Natalia Bazanova
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
- Present address:
Commonwealth Scientific and Industrial Research OrganisationGlen OsmondSA5064Australia
| | - Maria Hrmova
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
| | - Stephan Haefele
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
- Present address:
Rothamsted ResearchWest Common HarpendenHertfordshireAl5 2JQUK
| | - Nataliya Kovalchuk
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
| | - Sergiy Lopato
- School of Agriculture, Food and WineUniversity of AdelaideGlen OsmondSAAustralia
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33
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Liu H, Hu M, Wang Q, Cheng L, Zhang Z. Role of Papain-Like Cysteine Proteases in Plant Development. FRONTIERS IN PLANT SCIENCE 2018; 9:1717. [PMID: 30564252 PMCID: PMC6288466 DOI: 10.3389/fpls.2018.01717] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 11/05/2018] [Indexed: 05/18/2023]
Abstract
Papain-like cysteine proteases (PLCP) are prominent peptidases found in most living organisms. In plants, PLCPs was divided into nine subgroups based on functional and structural characterization. They are key enzymes in protein proteolysis and involved in numerous physiological processes. In this paper, we reviewed the updated achievements of physiological roles of plant PLCPs in germination, development, senescence, immunity, and stress responses.
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Affiliation(s)
- Huijuan Liu
- Henan Key Laboratory of Tea Plant Biology, Xinyang Normal University, Xinyang, China
- College of Life Science, Xinyang Normal University, Xinyang, China
| | - Menghui Hu
- College of Life Science, Xinyang Normal University, Xinyang, China
| | - Qi Wang
- College of Life Science, Xinyang Normal University, Xinyang, China
| | - Lin Cheng
- Henan Key Laboratory of Tea Plant Biology, Xinyang Normal University, Xinyang, China
- College of Life Science, Xinyang Normal University, Xinyang, China
| | - Zaibao Zhang
- Henan Key Laboratory of Tea Plant Biology, Xinyang Normal University, Xinyang, China
- College of Life Science, Xinyang Normal University, Xinyang, China
- *Correspondence: Zaibao Zhang,
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34
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Tan Y, Yang Y, Li C, Liang B, Li M, Ma F. Overexpression of MpCYS4, a phytocystatin gene from Malus prunifolia (Willd.) Borkh., delays natural and stress-induced leaf senescence in apple. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 115:219-228. [PMID: 28384562 DOI: 10.1016/j.plaphy.2017.03.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 03/30/2017] [Accepted: 03/30/2017] [Indexed: 05/23/2023]
Abstract
Phytocystatins are a well-characterized class of naturally occurring protease inhibitors that prevent the catalysis of papain-like cysteine proteases. The action of cystatins in stress tolerance has been studied intensively, but relatively little is known about their functions in plants during leaf senescence. Here, we examined the potential roles of the apple cystatin, MpCYS4, in leaf photosynthesis as well as the concentrations and composition of leaf proteins when plants encounter natural or stress-induced senescence. Overexpression of this gene in apple rootstock M26 effectively slowed the senescence-related declines in photosynthetic activity and chlorophyll concentrations and prevented the action of cysteine proteinases during the process of degrading proteins (e.g., Rubisco) in senescing leaves. Moreover, MpCYS4 alleviated the associated oxidative damage and enhanced the capacity of plants to eliminate reactive oxygen species by activating antioxidant enzymes such as ascorbate peroxidase, peroxidase, and catalase. Consequently, plant cells were protected against damage from free radicals during leaf senescence. Based on these results, we conclude that MpCYS4 functions in delaying natural and stress-induced senescence of apple leaves.
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Affiliation(s)
- Yanxiao Tan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yingli Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Chao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Bowen Liang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Mingjun Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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