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Wang T, Zheng Y, Xu C, Deng Y, Hao X, Chu Z, Tian J, Wang Y, Zhang X, Han Z, Wu T. Movement of ACC oxidase 3 mRNA from seeds to flesh promotes fruit ripening in apple. MOLECULAR PLANT 2024; 17:1221-1235. [PMID: 38902921 DOI: 10.1016/j.molp.2024.06.008] [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: 10/07/2023] [Revised: 02/07/2024] [Accepted: 06/17/2024] [Indexed: 06/22/2024]
Abstract
Xenia, the phenomenon in which the pollen genotype directly affects the phenotypic characteristics of maternal tissues (i.e., fruit ripening), has applications in crop production and breeding. However, the underlying molecular mechanism has yet to be elucidated. Here, we investigated whether mobile mRNAs from the pollen affect the ripening and quality-related characteristics of the fruit using cross-pollination between distinct Malus domestica (apple) cultivars. We demonstrated that hundreds of mobile mRNAs originating from the seeds are delivered to the fruit. We found that the movement of one of these mRNAs, ACC oxidase 3 (MdACO3), is coordinated with fruit ripening. Salicylic acid treatment, which can cause plasmodesmal closure, blocks MdACO3 movement, indicating that MdACO3 transcripts may move through the plasmodesmata. To assess the role of mobile MdACO3 transcripts in apple fruit, we created MdACO3-GFP-expressing apple seeds using MdACO3-GFP-overexpressing pollen for pollination and showed that MdACO3 transcripts in the transgenic seeds move to the flesh, where they promote fruit ripening. Furthermore, we demonstrated that MdACO3 can be transported from the seeds to fruit in the fleshy-fruited species tomato and strawberry. These results underscore the potential of mobile mRNAs from seeds to influence fruit characteristics, providing an explanation for the xenia phenomenon. Notably, our findings highlight the feasibility of leveraging diverse pollen genomic resources, without resorting to genome editing, to improve fruit quality.
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Affiliation(s)
- Ting Wang
- College of Horticulture, China Agricultural University, Beijing, China
| | - Yi Zheng
- Plant Science and Technology College, Bioinformatics Center, Beijing University of Agriculture, Beijing, China
| | - Chen Xu
- College of Horticulture, China Agricultural University, Beijing, China
| | - Yulin Deng
- Plant Science and Technology College, Bioinformatics Center, Beijing University of Agriculture, Beijing, China
| | - Xinyi Hao
- College of Horticulture, China Agricultural University, Beijing, China
| | - Zicheng Chu
- College of Horticulture, China Agricultural University, Beijing, China
| | - Ji Tian
- Plant Science and Technology College, Bioinformatics Center, Beijing University of Agriculture, Beijing, China
| | - Yi Wang
- College of Horticulture, China Agricultural University, Beijing, China
| | - Xinzhong Zhang
- College of Horticulture, China Agricultural University, Beijing, China
| | - Zhenhai Han
- College of Horticulture, China Agricultural University, Beijing, China
| | - Ting Wu
- College of Horticulture, China Agricultural University, Beijing, China.
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2
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Ma Y, Li M, Wang S, Deng K, Zhao L, Luo J, Wang W, Wang F, Wang J. Transcriptomics Identifies Differentially Expressed Genes Inducing Tuber Formation in Early- and Late-Maturing Potatoes. PLANTS (BASEL, SWITZERLAND) 2024; 13:1879. [PMID: 38999719 PMCID: PMC11243988 DOI: 10.3390/plants13131879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/14/2024]
Abstract
The timing of potato tuberization is affected by potato ripeness, environmental factors, and polygene regulation. The accurate control of the transition to tuberization has both scientific and practical production value, but the key factors regulating this transition remain unclear. This study grafted an early-maturing potato variety (Favorita) scion to the late-maturing Qingshu 9 variety and demonstrated that a heterologous early-maturing scion can induce early potato formation on a late-maturing rootstock. The transcriptome of functional leaves and stolons of grafted plants was comprehensively analyzed and 593 differentially expressed genes (DEGs) were identified, including 38 transcription factors. Based on gene molecular function analysis and previous reports, we propose that PIF5, bHLH93, CBF3, ERF109, TCP19, and YABBY1 are the key DEGs that induce tuber formation in early- and late-maturing potatoes. The YABBY1 gene was subjected to functional verification. The leaf area of StYABBY1-overexpressing plants was smaller than the wild type and no potato tubercles were formed, while an RNA interference plant line showed no change in leaf area and formed tubers, indicating that StYABBY1 has a role in leaf size regulation and tuber formation.
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Affiliation(s)
- Yongzhen Ma
- Qinghai University, Xining 810016, China; (Y.M.); (K.D.)
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources, Qinghai University, Xining 810016, China
- Key Laboratory of Qinghai-Tibet Plateau Biotechnology Ministry of Education, Qinghai University, Xining 810016, China
- Qinghai Provincial Key Laboratory of Potato Breeding, Ministry of Education, Engineering Research Center of Potato in Northwest Region, Qinghai University, Xining 810016, China
| | - Mengtao Li
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (M.L.); (S.W.); (J.L.); (W.W.)
| | - Shujuan Wang
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (M.L.); (S.W.); (J.L.); (W.W.)
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute, College of Tropical Crops, Hainan University, Sanya 572025, China;
| | - Ke Deng
- Qinghai University, Xining 810016, China; (Y.M.); (K.D.)
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources, Qinghai University, Xining 810016, China
- Key Laboratory of Qinghai-Tibet Plateau Biotechnology Ministry of Education, Qinghai University, Xining 810016, China
- Qinghai Provincial Key Laboratory of Potato Breeding, Ministry of Education, Engineering Research Center of Potato in Northwest Region, Qinghai University, Xining 810016, China
| | - Long Zhao
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute, College of Tropical Crops, Hainan University, Sanya 572025, China;
| | - Jia Luo
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (M.L.); (S.W.); (J.L.); (W.W.)
| | - Wenquan Wang
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; (M.L.); (S.W.); (J.L.); (W.W.)
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute, College of Tropical Crops, Hainan University, Sanya 572025, China;
| | - Fang Wang
- Qinghai University, Xining 810016, China; (Y.M.); (K.D.)
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources, Qinghai University, Xining 810016, China
- Key Laboratory of Qinghai-Tibet Plateau Biotechnology Ministry of Education, Qinghai University, Xining 810016, China
- Qinghai Provincial Key Laboratory of Potato Breeding, Ministry of Education, Engineering Research Center of Potato in Northwest Region, Qinghai University, Xining 810016, China
| | - Jian Wang
- Qinghai University, Xining 810016, China; (Y.M.); (K.D.)
- Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Academy of Agriculture and Forestry Sciences, Qinghai University, Xining 810016, China
- National Key Laboratory of Sanjiangyuan Ecology and Plateau Agriculture and Animal Husbandry, Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources, Qinghai University, Xining 810016, China
- Key Laboratory of Qinghai-Tibet Plateau Biotechnology Ministry of Education, Qinghai University, Xining 810016, China
- Qinghai Provincial Key Laboratory of Potato Breeding, Ministry of Education, Engineering Research Center of Potato in Northwest Region, Qinghai University, Xining 810016, China
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Kondhare KR, Patil NS, Siddappa S, Banerjee AK, Hannapel DJ. Tandem Expression of a Mobile RNA and Its RNA-Binding Protein(s) Enhances Tuber Productivity in Potato. Int J Mol Sci 2023; 24:15754. [PMID: 37958738 PMCID: PMC10647900 DOI: 10.3390/ijms242115754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/07/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
A significant number of discoveries in past two decades have established the importance of long-distance signaling in controlling plant growth, development, and biotic and abiotic stress responses. Numerous mobile signals, such as mRNAs, proteins, including RNA-binding proteins, small RNAs, sugars, and phytohormones, are shown to regulate various agronomic traits such as flowering, fruit, seed development, and tuberization. Potato is a classic model tuber crop, and several mobile signals are known to govern tuber development. However, it is unknown if these mobile signals have any synergistic effects on potato crop improvement. Here, we employed a simple innovative strategy to test the cumulative effects of a key mobile RNA, StBEL5, and its RNA-binding proteins, StPTB1, and -6 on tuber productivity of two potato cultivars, Solanum tuberosum cv. Désirée and subspecies andigena, using a multi-gene stacking approach. In this approach, the coding sequences of StBEL5 and StPTB1/6 are driven by their respective native promoters to efficiently achieve targeted expression in phloem for monitoring tuber productivity. We demonstrate that this strategy resulted in earliness for tuberization and enhanced tuber productivity by 2-4 folds under growth chamber, greenhouse, and field conditions. This multi-gene stacking approach could be adopted to other crops, whose agronomic traits are governed by mobile macromolecules, expanding the possibilities to develop crops with improved traits and enhanced yields.
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Affiliation(s)
- Kirtikumar R. Kondhare
- Biology Division, Indian Institute of Science Education and Research (IISER), Homi Bhabha Road, Pune 411008, Maharashtra, India; (K.R.K.); (N.S.P.)
| | - Nikita S. Patil
- Biology Division, Indian Institute of Science Education and Research (IISER), Homi Bhabha Road, Pune 411008, Maharashtra, India; (K.R.K.); (N.S.P.)
| | - Sundaresha Siddappa
- Crop Improvement Division, Central Potato Research Institute (CPRI), Shimla 171001, Himachal Pradesh, India
| | - Anjan K. Banerjee
- Biology Division, Indian Institute of Science Education and Research (IISER), Homi Bhabha Road, Pune 411008, Maharashtra, India; (K.R.K.); (N.S.P.)
| | - David J. Hannapel
- Plant Biology Major, 253 Horticulture Hall, Iowa State University (ISU), Ames, IA 50011, USA
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Kuznetsova K, Efremova E, Dodueva I, Lebedeva M, Lutova L. Functional Modules in the Meristems: "Tinkering" in Action. PLANTS (BASEL, SWITZERLAND) 2023; 12:3661. [PMID: 37896124 PMCID: PMC10610496 DOI: 10.3390/plants12203661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023]
Abstract
BACKGROUND A feature of higher plants is the modular principle of body organisation. One of these conservative morphological modules that regulate plant growth, histogenesis and organogenesis is meristems-structures that contain pools of stem cells and are generally organised according to a common principle. Basic content: The development of meristems is under the regulation of molecular modules that contain conservative interacting components and modulate the expression of target genes depending on the developmental context. In this review, we focus on two molecular modules that act in different types of meristems. The WOX-CLAVATA module, which includes the peptide ligand, its receptor and the target transcription factor, is responsible for the formation and control of the activity of all meristem types studied, but it has its own peculiarities in different meristems. Another regulatory module is the so-called florigen-activated complex, which is responsible for the phase transition in the shoot vegetative meristem (e.g., from the vegetative shoot apical meristem to the inflorescence meristem). CONCLUSIONS The review considers the composition and functions of these two functional modules in different developmental programmes, as well as their appearance, evolution and use in plant breeding.
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Affiliation(s)
| | | | - Irina Dodueva
- Department of Genetics and Biotechnology, Saint Petersburg State University, Universitetskaya Emb. 7/9, 199034 Saint Petersburg, Russia; (K.K.); (E.E.); (M.L.); (L.L.)
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5
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Xoconostle-Morán BB, Xoconostle-Cázares B, Vargas-Hernández BY, Núñez-Muñoz LA, Calderón-Pérez B, Ruiz-Medrano R. Long-Distance Movement of Solanum tuberosum Translationally Controlled Tumor Protein ( StTCTP) mRNA. PLANTS (BASEL, SWITZERLAND) 2023; 12:2839. [PMID: 37570993 PMCID: PMC10420919 DOI: 10.3390/plants12152839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/19/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023]
Abstract
Long-distance signaling molecules in plants, including different RNA species, play a crucial role in the development and environmental responses. Among these mobile signals, the Translationally Controlled Tumor Protein (TCTP) mRNA is one of the most abundant. TCTP regulates cell-cycle progression and programmed cell death and is involved in responses to abiotic and biotic stress as well as plant regeneration, among other functions. Considering that the ability to induce plant regeneration is linked to a possible role of TCTP in vegetative propagation and asexual reproduction, we analyzed TCTP overexpression in a solanaceous plant model that can reproduce asexually by regeneration from stolons and tubers. Therefore, in this study, the effect of transient expression of Solanum tuberosum TCTP (StTCTP) on tuber development and vegetative propagation was described. StTCTP mRNA was shown to be transported long-distance. Additionally, transient overexpression of StTCTP resulted in sprouts with a greater diameter compared to control plants. Furthermore, the early stages of tuberization were induced compared to control plants, in which only mature tubers were observed. These results suggest a role of TCTP in vegetative propagation and asexual reproduction.
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Affiliation(s)
| | | | | | | | | | - Roberto Ruiz-Medrano
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Ciudad de México 07360, Mexico; (B.B.X.-M.); (B.X.-C.); (B.Y.V.-H.); (L.A.N.-M.); (B.C.-P.)
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6
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Li J, Zhu J, Li H, Ma J, Chen P, Zhou Y. The Effects of NAA on the Tuberous Root Yield and Quality of Rehmannia glutinosa and Its Regulatory Mechanism by Transcriptome and Metabolome Profiling. Curr Issues Mol Biol 2022; 44:3291-3311. [PMID: 35892713 PMCID: PMC9394425 DOI: 10.3390/cimb44080227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 11/16/2022] Open
Abstract
Naphthylacetic acid (NAA) was used to increase the tuberous root yield of Rehmannia glutinosa, but the differences between its NAA-treated and control tuberous roots (NT and CG) and the regulatory mechanism of NAA effect remain unclear. In order to investigate them, NTs and CGs were used as materials, and both yield-related indices were measured; the metabolomics and transcriptomics were used to capture differentially accumulated metabolites (DAM) and to validate them via mining differentially expressed genes (DEGs), respectively. The effects of NAA treatment: increased NT mass per plant by 21.14%, through increasing the number of roots and increasing the mean root diameter; increased catalpol content by 1.2234% (p < 0.05); up-regulated 11DAMs and 596DEGs; and down-regulated 18 DAMs and 517DEGs. In particular, we discovered that NAA regulated its DAMs and biomass via 10 common metabolic pathways, and that the number of NAA-down-regulated DAMs was more than that of NAA-up-regulated DAMs in its tuberous root. Furthermore, HPLC validated the changes of several DAMs and 15 DEGs (4CL, ARF, CCoAOMT, ARGOS, etc.) associated with the yield increase and DAMs were verified by RT-qPCR. This study provided some valuable resources, such as tuberous root indices, key genes, and DAMs of Rehmannia glutinosa in response to NAA for distinguishing the CGs from NTs, and novel insights into the regulatory mechanism of NAA effects on both at the transcriptomic and metabolomic levels, so it will lay a theoretical foundation for NAA-regulated plant yield and quality, and provide references for prohibiting the uses of NAA as a swelling agent in medicinal tuber plants in China.
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He Y, Yang T, Yan S, Niu S, Zhang Y. Identification and characterization of the BEL1-like genes reveal their potential roles in plant growth and abiotic stress response in tomato. Int J Biol Macromol 2022; 200:193-205. [PMID: 34995657 DOI: 10.1016/j.ijbiomac.2021.12.175] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 11/05/2022]
Abstract
BEL1-like (BELL) transcription factors, belonging to three-amino acid-loop-extension (TALE) superfamily, are ubiquitous in plants. BELLs regulate a wide range of plant biological processes, but the understanding of the BELL family in tomato (Solanum lycopersicum) remains fragmentary. In this study, a total of 14 members of the SlBELL family were identified in tomato. SlBELL proteins contained the conserved BELL and SKY domains that served as typical structures of the BELL family. Syntenic analysis indicated that the BELL orthologs between tomato and other dicots had close evolutionary relationships. Furthermore, the promoters of SlBELLs contained numerous cis-elements related to plant growth, development, and stress response. The SlBELL genes exhibited different tissue-specific expression profiles and responded to cold, heat, and drought stresses, implying their potential functions in regulating multiple aspects of plant growth, as well as in response to abiotic stresses. Through the interaction network prediction, we found that most SlBELL proteins displayed probable interactions with the KNOTTED1-like (KNOX) proteins, another kind of transcription factor in the TALE superfamily. These findings laid foundations for further dissection of the functions of SlBELL genes in tomato, as well as for exploration of the evolutionary relationships of BELL homologs among different plant species.
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Affiliation(s)
- Yu He
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Tongwen Yang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Siwei Yan
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Shaobo Niu
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Yan Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
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Zierer W, Rüscher D, Sonnewald U, Sonnewald S. Tuber and Tuberous Root Development. ANNUAL REVIEW OF PLANT BIOLOGY 2021; 72:551-580. [PMID: 33788583 DOI: 10.1146/annurev-arplant-080720-084456] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Root and tuber crops have been an important part of human nutrition since the early days of humanity, providing us with essential carbohydrates, proteins, and vitamins. Today, they are especially important in tropical and subtropical regions of the world, where they help to feed an ever-growing population. Early induction and storage organ size are important agricultural traits, as they determine yield over time. During potato tuberization, environmental and metabolic status are sensed, ensuring proper timing of tuberization mediated by phloem-mobile signals. Coordinated cellular restructuring and expansion growth, as well as controlled storage metabolism in the tuber, are executed. This review summarizes our current understanding of potato tuber development and highlights similarities and differences to important tuberous root crop species like sweetpotato and cassava. Finally, we point out knowledge gaps that need to be filled before a complete picture of storage organ development can emerge.
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Affiliation(s)
- Wolfgang Zierer
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, 91058 Erlangen, Germany; , , ,
| | - David Rüscher
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, 91058 Erlangen, Germany; , , ,
| | - Uwe Sonnewald
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, 91058 Erlangen, Germany; , , ,
| | - Sophia Sonnewald
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, 91058 Erlangen, Germany; , , ,
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9
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Kondhare KR, Patil NS, Banerjee AK. A historical overview of long-distance signalling in plants. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:4218-4236. [PMID: 33682884 DOI: 10.1093/jxb/erab048] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Be it a small herb or a large tree, intra- and intercellular communication and long-distance signalling between distant organs are crucial for every aspect of plant development. The vascular system, comprising xylem and phloem, acts as a major conduit for the transmission of long-distance signals in plants. In addition to expanding our knowledge of vascular development, numerous reports in the past two decades revealed that selective populations of RNAs, proteins, and phytohormones function as mobile signals. Many of these signals were shown to regulate diverse physiological processes, such as flowering, leaf and root development, nutrient acquisition, crop yield, and biotic/abiotic stress responses. In this review, we summarize the significant discoveries made in the past 25 years, with emphasis on key mobile signalling molecules (mRNAs, proteins including RNA-binding proteins, and small RNAs) that have revolutionized our understanding of how plants integrate various intrinsic and external cues in orchestrating growth and development. Additionally, we provide detailed insights on the emerging molecular mechanisms that might control the selective trafficking and delivery of phloem-mobile RNAs to target tissues. We also highlight the cross-kingdom movement of mobile signals during plant-parasite relationships. Considering the dynamic functions of these signals, their implications in crop improvement are also discussed.
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Affiliation(s)
- Kirtikumar R Kondhare
- Plant Molecular Biology Unit, Biochemical Sciences Division, CSIR-National Chemical Laboratory (NCL) Pune, Maharashtra, India
| | - Nikita S Patil
- Biology Division, Indian Institute of Science Education and Research (IISER) Pune, Maharashtra, India
| | - Anjan K Banerjee
- Biology Division, Indian Institute of Science Education and Research (IISER) Pune, Maharashtra, India
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10
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Kondhare KR, Patil AB, Giri AP. Auxin: An emerging regulator of tuber and storage root development. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 306:110854. [PMID: 33775360 DOI: 10.1016/j.plantsci.2021.110854] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/30/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
Many tuber and storage root crops owing to their high nutritional values offer high potential to overcome food security issues. The lack of information regarding molecular mechanisms that govern belowground storage organ development (except a tuber crop, potato) has limited the application of biotechnological strategies for improving storage crop yield. Phytohormones like gibberellin and cytokinin are known to play a crucial role in governing potato tuber development. Another phytohormone, auxin has been shown to induce tuber initiation and growth, and its crosstalk with gibberellin and strigolactone in a belowground modified stem (stolon) contributes to the overall potato tuber yield. In this review, we describe the crucial role of auxin biology in development of potato tubers. Considering the emerging reports from commercially important storage root crops (sweet potato, cassava, carrot, sugar beet and radish), we propose the function of auxin and related gene regulatory network in storage root development. The pattern of auxin content of stolon during various stages of potato tuber formation appears to be consistent with its level in various developmental stages of storage roots. We have also put-forward the potential of three-way interaction between auxin, strigolactone and mycorrhizal fungi in tuber and storage root development. Overall, we propose that auxin gene regulatory network and its crosstalk with other phytohormones in stolons/roots could govern belowground tuber and storage root development.
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Affiliation(s)
- Kirtikumar R Kondhare
- Plant Molecular Biology Unit, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India.
| | - Aruna B Patil
- Plant Molecular Biology Unit, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Ashok P Giri
- Plant Molecular Biology Unit, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
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11
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The interplay of phloem-mobile signals in plant development and stress response. Biosci Rep 2021; 40:226464. [PMID: 32955092 PMCID: PMC7538631 DOI: 10.1042/bsr20193329] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 09/16/2020] [Accepted: 09/18/2020] [Indexed: 01/28/2023] Open
Abstract
Plants integrate a variety of biotic and abiotic factors for optimal growth in their given environment. While some of these responses are local, others occur distally. Hence, communication of signals perceived in one organ to a second, distal part of the plant and the coordinated developmental response require an intricate signaling system. To do so, plants developed a bipartite vascular system that mediates the uptake of water, minerals, and nutrients from the soil; transports high-energy compounds and building blocks; and traffics essential developmental and stress signals. One component of the plant vasculature is the phloem. The development of highly sensitive mass spectrometry and molecular methods in the last decades has enabled us to explore the full complexity of the phloem content. As a result, our view of the phloem has evolved from a simple transport path of photoassimilates to a major highway for pathogens, hormones and developmental signals. Understanding phloem transport is essential to comprehend the coordination of environmental inputs with plant development and, thus, ensure food security. This review discusses recent developments in its role in long-distance signaling and highlights the role of some of the signaling molecules. What emerges is an image of signaling paths that do not just involve single molecules but rather, quite frequently an interplay of several distinct molecular classes, many of which appear to be transported and acting in concert.
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Hoang NV, Park C, Kamran M, Lee JY. Gene Regulatory Network Guided Investigations and Engineering of Storage Root Development in Root Crops. FRONTIERS IN PLANT SCIENCE 2020; 11:762. [PMID: 32625220 PMCID: PMC7313660 DOI: 10.3389/fpls.2020.00762] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 05/13/2020] [Indexed: 05/23/2023]
Abstract
The plasticity of plant development relies on its ability to balance growth and stress resistance. To do this, plants have established highly coordinated gene regulatory networks (GRNs) of the transcription factors and signaling components involved in developmental processes and stress responses. In root crops, yields of storage roots are mainly determined by secondary growth driven by the vascular cambium. In relation to this, a dynamic yet intricate GRN should operate in the vascular cambium, in coordination with environmental changes. Despite the significance of root crops as food sources, GRNs wired to mediate secondary growth in the storage root have just begun to emerge, specifically with the study of the radish. Gene expression data available with regard to other important root crops are not detailed enough for us directly to infer underlying molecular mechanisms. Thus, in this review, we provide a general overview of the regulatory programs governing the development and functions of the vascular cambium in model systems, and the role of the vascular cambium on the growth and yield potential of the storage roots in root crops. We then undertake a reanalysis of recent gene expression data generated for major root crops and discuss common GRNs involved in the vascular cambium-driven secondary growth in storage roots using the wealth of information available in Arabidopsis. Finally, we propose future engineering schemes for improving root crop yields by modifying potential key nodes in GRNs.
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Affiliation(s)
- Nam V. Hoang
- School of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Chulmin Park
- School of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Muhammad Kamran
- School of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Ji-Young Lee
- School of Biological Sciences, Seoul National University, Seoul, South Korea
- Plant Genomics and Breeding Institute, Seoul National University, Seoul, South Korea
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Long-Distance Movement of mRNAs in Plants. PLANTS 2020; 9:plants9060731. [PMID: 32531920 PMCID: PMC7356335 DOI: 10.3390/plants9060731] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/06/2020] [Accepted: 06/08/2020] [Indexed: 01/28/2023]
Abstract
Long-distance transport of information molecules in the vascular tissues could play an important role in regulating plant growth and enabling plants to cope with adverse environments. Various molecules, including hormones, proteins, small peptides and small RNAs have been detected in the vascular system and proved to have systemic signaling functions. Sporadic studies have shown that a number of mRNAs produced in the mature leaves leave their origin cells and move to distal tissues to exert important physiological functions. In the last 3-5 years, multiple heterograft systems have been developed to demonstrate that a large quantity of mRNAs are mobile in plants. Further comparison of the mobile mRNAs identified from these systems showed that the identities of these mRNAs are very diverse. Although species-specific mRNAs may regulate the unique physiological characteristic of the plant, mRNAs with conserved functions across multiple species are worth more effort in identifying universal physiological mechanisms existing in the plant kingdom.
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Herben T, Klimešová J. Evolution of clonal growth forms in angiosperms. THE NEW PHYTOLOGIST 2020; 225:999-1010. [PMID: 31505049 DOI: 10.1111/nph.16188] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 08/28/2019] [Indexed: 06/10/2023]
Abstract
Clonal growth of plants is attained by a number of morphologically different organs (e.g. stolons, rhizomes, and roots), which are not functionally equivalent. Consequently, these clonal growth organ (CGO) types can determine functional traits that are associated with clonality, although little is known about their evolutionary flexibility or the constraining role they play on clonal traits. We investigated the rates of evolutionary change by which individual CGOs are acquired and lost using a set of 2652 species of Central European flora. Furthermore, we asked how these individual CGOs constrain functionally relevant clonal traits, such as lateral spread, number of offspring, and persistence of connections. We show that plants can easily switch in evolution among individual types of CGO and between clonal and nonclonal habits. However, not all these transitions are equally probable. Namely, stem-based clonal growth and root-based clonal growth constitute evolutionarily separate forms of clonal growth. Clonal traits are strongly constrained by individual CGO types. Specifically, fast lateral spread is attained by stolons or hypogeogenous rhizomes, and persistent connections are attained by all rhizome types. However, the ease with which clonal organs appear and disappear in evolution implies that plants can overcome these constraints by adjusting their morphologies.
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Affiliation(s)
- Tomáš Herben
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic
| | - Jitka Klimešová
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic
- Institute of Botany, Czech Academy of Sciences, CZ-379 82, Třeboň, Czech Republic
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