Availability: Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana

Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana:

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Bibliographic Details
Main Author:	Wang, Yang (Author)
Format:	Thesis/Dissertation Book
Language:	English
Published:	Potsdam 2022
Subjects:	Hochschulschrift
Links:	https://d-nb.info/1269631241/04 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=034326029&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Physical Description:	III, 130 Blätter Illustrationen, Diagramme 30 cm

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adam_text	TABLE OF CONTENTS LIST OF ABBREVIATIONS ................................................................................................................................. 1 ABSTRACT ..................................................................................................................................................... 2 ZUSAMMENFASSUNG ................................................................................................................................... 3 ACKNOWLEDGEMENTS .................................................................................................................................. 4 1. GENERAL INTRODUCTION ............................................................................................................................. 5 1.1 THE PLANT CELL WALL ........................................................................................................................... 5 1.1.1 CELLULOSE ................................................................................................................................... 6 1.1.2 PECTIN ....................................................................................................................................... 6 1.1.3 HEMICELLULOSE ........................................................................................................................... 7 1.1.4 GLYCOSYLATED PROTEINS ............................................................................................................... 7 1.2 THE PLANT CYTOSKELETON .................................................................................................................... 8 1.2.1 MICROTUBULES ............................................................................................................................ 9 1.2.1.1 STRUCTURE AND DYNAMICS .................................................................................................... 9 1.2.1.2 ORGANIZATION .................................................................................................................... 10 1.2.1.3 MECHANICAL STRESS AND MICROTUBULES ............................................................................. 12 1.2.1.4 FUNCTION .......................................................................................................................... 12 1.2.2 ACTIN ....................................................................................................................................... 13 1.2.2.1 STRUCTURE AND DYNAMICS .................................................................................................. 13 1.2.2.2 ORGANIZATION .................................................................................................................... 14 1.2.2.3 MECHANICAL STRESSES AND ACTIN ........................................................................................ 15 1.2.2.3 FUNCTION .............................................................................................. : ........................... 16 1.2.3 INTERACTION BETWEEN MICROTUBULE AND ACTIN ......................................................................... 17 1.3 BIOMECHANICS BEHIND PLANT MORPHOGENESIS ................................................................................. 18 1.3.1 PLANT CELL GROWTH .................................................................................................................... 18 1.3.2 MECHANICAL STRESS IN PLANT CELLS AND TISSUES .......................................................................... 18 1.3.3 A BRIEF INTRODUCTION ON HOW PLANTS SENSE MECHANICAL STRESS ............................................... 22 1.3.4 DIRECTIONAL GROWTH OF PLANT CELLS ............................................................................................ 23 1.3.5 AUXIN AFFECTS CELL WALL MECHANICS AND GROWTH ...................................................................... 25 1.3.6 MECHANICAL FEEDBACK REGULATION OF MICROTUBULE ORGANIZATION AND DIRECTIONAL CELL GROWTH 26 1.3.7 THE INITIATION OF DIRECTIONAL GROWTH IN PLANT CELLS ................................................................. 28 1.4 PLANT CELL DIVISION .......................................................................................................................... 28 1.4.1 PLANT CELL DIVISION ORIENTATION ............................................................................................... 28 1.4.1.1 RULES REGULATING DIVISION ORIENTATION ............................................................................. 28 1.4.1.2 THE CYTOSKELETON IN THE REGULATION OF PLANT CELL DIVISION ORIENTATION ........................... 29 1.4.2 MOLECULAR ACTORS IN DIVISION ORIENTATION REGULATION ............................................................. 33 1.4.3 CELL DIVISION ORIENTATION AND MORPHOGENESIS ....................................................................... 37 1.5 RESEARCH OBJECTIVES ...................................................................................................................... 38 2. THE ACTIN CYTOSKELETON IMPACTS SAM DEVELOPMENT ........................................................................... 39 2.1 INTRODUCTION .................................................................................................................................. 39 2.2 MATERIALS AND METHODS ................................................................................................................. 40 2.3 RESULTS ........................................................................................................................................... 45 2.3.1 MORPHOLOGICAL DEFECTS OF AERIAL ORGANS IN ACT2-L ACT7-L ...................................................... 45 2.3.2 ACTIN PERTURBATION RESULTS IN CHANGES TO PHYLLOTACTIC PATTERNING ......................................... 46 2.3.3 ACTIN IS REQUIRED FOR SAM DEVELOPMENT ............................................................................... 48 2.3.4 CMT ORGANIZATION APPEARS UNPERTURBED IN THE SAM OF THE ACT2-L ACT7-L ......................... 53 2.3.5 TRANSIENT MECHANICAL RESPONSE OF CMTS ARE INDEPENDENT OF ACTIN AT SAM ........................ 55 2.4 DISCUSSION AND OUTLOOK ................................................................................................................. 57 3. ACTIN ORGANIZATION AT SAM .................................................................................................................. 62 3.1 INTRODUCTION .................................................................................................................................. 62 3.1.1 LIVE-CELL IMAGING OF FILAMENTOUS ACTIN .................................................................................. 62 3.1.2 ACTIN ORGANIZATION IN PLANT CELLS ............................................................................................. 63 3.2 MATERIALS AND METHODS ................................................................................................................. 65 3.3 RESULTS ........................................................................................................................................... 68 3.3.1 CAFS DO NOT SHOW SUPRA-CELLULAR ORGANIZATION PATTERN AT THE SAM ..................................... 68 3.3.2 ACTIN TENDS TO ALIGN WITH THE LONGITUDINAL AXES OF SAM CELLS ............................................... 69 3.3.3 ACTIN DYNAMICS DURING MITOSIS AT SAM ...................................................... 70 3.3.4 ACTIN ORGANIZATION IN ACT2-L ACT7-L ........................................................................................ 73 3.4 DISCUSSION AND OUTLOOK ................................................................................................................. 75 4. ROLE OF ACTIN IN CELLULAR MORPHOGENESIS AT THE SAM .......................................................................... 77 4.1 INTRODUCTION .................................................................................................................................. 77 4.1.1 CELL PACKING ............................................................................................................................ 77 4.1.2 AVOIDANCE OF THE FORMATION OF FOUR-WAY JUNCTION AND TRICELLULAR JUNCTION PINCHING AFTER CELL DIVISION ............................................................................................................................................ 78 4.2 MATERIALSAND METHODS ................................................................................................................. 81 4.3 RESULTS ........................................................................................................................................... 84 4.3.1 PERTURBATION OF ACTIN AFFECTS SAM CELL GEOMETRY .................................................................. 84 4.3.2 CELL RECTANGULARITY AND INTERNAL ANGLES ARE ALTERED IN ACT2-L ACT7-L SAM ........................... 85 4.3.3 ACTIN PERTURBATION AFFECTS TRICELLULAR JUNCTION PINCHING ......................................................... 88 4.3.4 ACTIN INFLUENCES THE RESTRICTION OF NEW CELL WALL EXPANSION .................................................. 91 4.3.5 ACTIN PERTURBATION ATTENUATES MECHANICAL MATURATION OF NEW CELL WALLS ........................... 93 II 4.3.6 FOUR-WAY JUNCTION APPEARS MORE FREQUENTLY IN ACT2 ACT7 SAM ............................................ 94 4.3.7 A BROADER PPB IN ACT2-L ACT7-L COINCIDES WITH INACCURACY IN AVOIDING TRICELLULAR JUNCTIONS DURING DIVISION ................................................................................................................................ .. 4.3.8 CELL PACKING DEFECTS MAY AFFECT DIFFUSION BETWEEN SAM CELLS .............................................. 98 4.4 DISCUSSION AND OUTLOOK ............................................................................................................... 100 5. APPENDIX ............................................................................................................................................ 106 CURRICULUM VITAE .................................................................................................................................... 107 BIBLIOGRAPHY ........................................................................................................................................... 109 III
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spellingShingle	Wang, Yang Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana
subject_GND	(DE-588)4113937-9
title	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana
title_auth	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana
title_exact_search	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana
title_full	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana von Yang Wang
title_fullStr	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana von Yang Wang
title_full_unstemmed	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana von Yang Wang
title_short	Role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of Arabidopsis thaliana
title_sort	role of the actin cytoskeleton in cellular morphogenesis at the shoot apical meristem of arabidopsis thaliana
topic_facet	Hochschulschrift
url	https://d-nb.info/1269631241/04 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=034326029&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
work_keys_str_mv	AT wangyang roleoftheactincytoskeletonincellularmorphogenesisattheshootapicalmeristemofarabidopsisthaliana

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