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Sutton M, Roussel B, Chavez DJ, Malladi A. Synthesis of active cytokinins mediated by LONELY GUY is associated with cell production during early fruit growth in peach [ Prunus persica (L.) Batsch]. FRONTIERS IN PLANT SCIENCE 2023; 14:1155755. [PMID: 37152121 PMCID: PMC10157650 DOI: 10.3389/fpls.2023.1155755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 04/03/2023] [Indexed: 05/09/2023]
Abstract
Early fruit growth in peach is characterized by cell production. Cytokinins have established roles in regulating cell division and may regulate cell production during early fruit growth. However, the role of active cytokinins and regulation of their metabolism are not well characterized in the peach fruit. In this study, fruit growth parameters, concentrations of active cytokinin bases and a cytokinin riboside, and expression of three key cytokinin metabolism-related gene families were determined during early fruit growth. Early fruit growth was associated with intensive cell production until around 40 days after full bloom. During the early stages of this period, trans-zeatin (tZ), isopentenyladenine (iP), dihydrozeatin (DHZ) and tZ-riboside (tZR), displayed higher abundance which declined rapidly by 3.5- to 16-fold during the later stages. Changes in concentration of active cytokinin bases were consistent with roles for them in regulating cell production. Expression analyses of members of cytokinin biosynthesis-related gene families, ISOPENTENYL TRANSFERASE (IPT) and LONELY GUY (LOG), further indicated that mechanisms of synthesis of cytokinin metabolites and their activation are functional within the fruit pericarp. Changes in expression of multiple members of the LOG family paralleled changes in active cytokinin concentrations. Specifically, transcript abundance of LOG3 and LOG8 were correlated with concentrations of tZ, and iP and DHZ, respectively, suggesting that the direct activation pathway is an important route for active cytokinin base synthesis during early fruit development. Transcript abundance of two CYTOKININ OXIDASE (CKX) genes, CKX1 and CKX2, was consistent with roles in cytokinin catabolism during later stages of early fruit growth. Together, these data support a role for active cytokinins synthesized in the fruit pericarp in regulating early fruit growth in peach.
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Affiliation(s)
- Mary Sutton
- Department of Horticulture, University of Georgia, Athens, GA, United States
| | - Bayleigh Roussel
- Department of Horticulture, University of Georgia, Athens, GA, United States
| | - Dario J. Chavez
- Department of Horticulture, University of Georgia, Griffin, GA, United States
| | - Anish Malladi
- Department of Horticulture, University of Georgia, Athens, GA, United States
- *Correspondence: Anish Malladi,
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Zsögön A, Cermak T, Voytas D, Peres LEP. Genome editing as a tool to achieve the crop ideotype and de novo domestication of wild relatives: Case study in tomato. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 256:120-130. [PMID: 28167025 DOI: 10.1016/j.plantsci.2016.12.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 12/21/2016] [Accepted: 12/23/2016] [Indexed: 05/02/2023]
Abstract
The ideotype is a theoretical model of an archetypal cultivated plant. Recent progress in genome editing is aiding the pursuit of this ideal in crop breeding. Breeding is relatively straightforward when the traits in question are monogenic in nature and show Mendelian inheritance. Conversely, traits with a diffuse, polygenic basis such as abiotic stress resistance are more difficult to harness. In recent years, many genes have been identified that are important for plant domestication and act by increasing yield, grain or fruit size or altering plant architecture. Here, we propose that (a) key monogenic traits whose physiology has been unveiled can be molecularly tailored to achieve the ideotype; and (b) wild relatives of crops harboring polygenic stress resistance genes or other traits of interest could be de novo domesticated by manipulating monogenic yield-related traits through state-of-the-art gene editing techniques. An overview of the genomic and physiological challenges in the world's main staple crops is provided. We focus on tomato and its wild Solanum (section Lycopersicon) relatives as a suitable model for molecular design in the pursuit of the ideotype for elite cultivars and to test de novo domestication of wild relatives.
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Affiliation(s)
- Agustin Zsögön
- Laboratory of Molecular Plant Physiology, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Tomas Cermak
- Department of Genetics, Cell Biology and Development, Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Dan Voytas
- Department of Genetics, Cell Biology and Development, Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Lázaro Eustáquio Pereira Peres
- Laboratory of Hormonal Control of Plant Development, Departamento de Ciências Biológicas, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, CP 09 13418-900 Piracicaba, SP, Brazil.
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Zalabák D, Pospíšilová H, Šmehilová M, Mrízová K, Frébort I, Galuszka P. Genetic engineering of cytokinin metabolism: prospective way to improve agricultural traits of crop plants. Biotechnol Adv 2011; 31:97-117. [PMID: 22198203 DOI: 10.1016/j.biotechadv.2011.12.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Accepted: 12/02/2011] [Indexed: 01/02/2023]
Abstract
Cytokinins (CKs) are ubiquitous phytohormones that participate in development, morphogenesis and many physiological processes throughout plant kingdom. In higher plants, mutants and transgenic cells and tissues with altered activity of CK metabolic enzymes or perception machinery, have highlighted their crucial involvement in different agriculturally important traits, such as productivity, increased tolerance to various stresses and overall plant morphology. Furthermore, recent precise metabolomic analyses have elucidated the specific occurrence and distinct functions of different CK types in various plant species. Thus, smooth manipulation of active CK levels in a spatial and temporal way could be a very potent tool for plant biotechnology in the future. This review summarises recent advances in cytokinin research ranging from transgenic alteration of CK biosynthetic, degradation and glucosylation activities and CK perception to detailed elucidation of molecular processes, in which CKs work as a trigger in model plants. The first attempts to improve the quality of crop plants, focused on cereals are discussed, together with proposed mechanism of action of the responses involved.
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Affiliation(s)
- David Zalabák
- Department of Molecular Biology, Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University, Šlechtitelů 11, 783 71 Olomouc, Czech Republic.
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Khan RS, Nakamura I, Mii M. Development of disease-resistant marker-free tomato by R/RS site-specific recombination. PLANT CELL REPORTS 2011; 30:1041-1053. [PMID: 21293863 DOI: 10.1007/s00299-011-1011-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 01/11/2011] [Accepted: 01/11/2011] [Indexed: 05/30/2023]
Abstract
The selection marker genes, imparting antibiotic or herbicide resistance, in the final transgenics have been criticized by the public and considered a hindrance in their commercialization. Multi-auto-transformation (MAT) vector system has been one of the strategies to produce marker-free transgenic plants without using selective chemicals and plant growth regulators (PGRs). In the study reported here, isopentenyltransferase (ipt) gene was used as a selection marker and wasabi defensin (WD) gene, isolated from Wasabia japonica as a target gene. WD was cloned from the binary vector, pEKH-WD to an ipt-type MAT vector, pMAT21 by gateway cloning and transferred to Agrobacterium tumefaciens strain EHA105. Infected cotyledons of tomato cv. Reiyo were cultured on PGR- and antibiotic-free MS medium. Adventitious shoots were developed by the explants infected with the pMAT21/wasabi defensin. The same PGR- and antibiotic-free MS medium was used in subcultures of the adventitious shoot lines (ASLs) to produce ipt and normal shoots. Approximately, 6 months after infection morphologically normal shoots were produced. Molecular analyses of the developed shoots confirmed the integration of gene of interest (WD) and excision of the selection marker (ipt). Expression of WD was confirmed by Northern blot and Western blot analyses. The marker-free transgenic plants exhibited enhanced resistance against Botrytis cinerea (gray mold), Alternaria solani (early blight), Fusarium oxysporum (Fusarium wilt) and Erysiphe lycopersici (powdery mildew).
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Affiliation(s)
- Raham Sher Khan
- Laboratory of Plant Cell Technology, Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo, Chiba 271-8510, Japan.
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Vegetables. BIOTECHNOLOGY IN AGRICULTURE AND FORESTRY 2010. [PMCID: PMC7121345 DOI: 10.1007/978-3-642-02391-0_25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The conscious promotion of health by an appropriate, balanced diet has become an important social request. Vegetable thereby possesses a special importance due to its high vitamin, mineral and dietary fibre content. Major progress has been made over the past few years in the transformation of vegetables. The expression of several genes has been inhibited by sense gene suppression, and new traits caused by new gene constructs are stably inherited. This chapter reviews advances in various traits such as disease resistance, abiotic stress tolerance, quality improvement, pharmaceutical and industrial application. Results are presented from most important vegetable families, like Solanaceae, Brassicaceae, Fabaceae, Cucurbitaceae, Asteraceae, Apiaceae, Chenopodiaceae and Liliaceae. Although many research trends in this report are positive, only a few transgenic vegetables have been released from confined into precommercial testing or into use.
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Ma QH. Genetic Engineering of Cytokinins and Their Application to Agriculture. Crit Rev Biotechnol 2008; 28:213-32. [DOI: 10.1080/07388550802262205] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Vriezen WH, Feron R, Maretto F, Keijman J, Mariani C. Changes in tomato ovary transcriptome demonstrate complex hormonal regulation of fruit set. THE NEW PHYTOLOGIST 2008; 177:60-76. [PMID: 18028300 DOI: 10.1111/j.1469-8137.2007.02254.x] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Plant hormones are considered to be important mediators of the fruit developmental signal after pollination. The role of phytohormones in tomato (Solanum lycopersicum) fruit set was investigated here. Transcriptome analysis of ovaries was performed using two complementary approaches: cDNA-amplified fragment length polymorphism (AFLP) and microarray analysis. The gene expression profiles obtained suggest that, in addition to auxin and gibberellin, ethylene and abscisic acid (ABA) are involved in regulating fruit set. Before fruit development, many genes involved in biotic and abiotic responses are active in the ovary. In addition, genes involved in ethylene and ABA biosynthesis were strongly expressed, suggesting relatively high ethylene and ABA concentrations before fruit set. Induction of fruit development, either by pollination or by gibberellin application, attenuated expression of all ethylene and ABA biosynthesis and response genes within 24 h. It is proposed that the function of ABA and ethylene in fruit set might be antagonistic to that of auxin and gibberellin in order to keep the ovary in a temporally protected and dormant state; either to protect the ovary tissue or to prevent fruit development before pollination and fertilization occur.
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Affiliation(s)
- Wim H Vriezen
- Department of Plant Cell Biology, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, the Netherlands
| | - Richard Feron
- Department of Plant Cell Biology, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, the Netherlands
| | - Fabio Maretto
- Department of Plant Cell Biology, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, the Netherlands
| | - Jasper Keijman
- Department of Plant Cell Biology, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, the Netherlands
| | - Celestina Mariani
- Department of Plant Cell Biology, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, the Netherlands
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Thakur BR, Singh RK, Nelson PE. Quality attributes of processed tomato products: A review. FOOD REVIEWS INTERNATIONAL 1996. [DOI: 10.1080/87559129609541085] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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