Synchronization of developmental, molecular and metabolic aspects of source–sink interactions

Nature Plants, Год журнала: 2020, Номер 6(2), С. 55 - 66

Опубликована: Фев. 10, 2020

Язык: Английский

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The Dynamics of Cambial Stem Cell Activity

Annual Review of Plant Biology, Год журнала: 2019, Номер 70(1), С. 293 - 319

Опубликована: Март 1, 2019

Stem cell populations in meristematic tissues at distinct locations the plant body provide potency of continuous growth. Primary meristems, apices body, contribute mainly to elongation main axes, whereas secondary meristems lateral positions are responsible for thickening these axes. The stem cells vascular cambium—a meristem—produce phloem (bast) and xylem (wood). sites primary growth spatially separated, mobile signals expected coordinate rates between apical populations. Although underlying mechanisms have not yet been uncovered, it seems likely that hormones, peptides, mechanical cues orchestrate In this review, we highlight current knowledge recent discoveries how cambial activity is regulated, with a focus on response environmental stress factors.

Язык: Английский

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High-resolution anatomical and spatial transcriptome analyses reveal two types of meristematic cell pools within the secondary vascular tissue of poplar stem

Molecular Plant, Год журнала: 2023, Номер 16(5), С. 809 - 828

Опубликована: Март 9, 2023

Язык: Английский

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Single-cell transcriptomics unveils xylem cell development and evolution

Genome biology, Год журнала: 2023, Номер 24(1)

Опубликована: Янв. 9, 2023

Abstract Background Xylem, the most abundant tissue on Earth, is responsible for lateral growth in plants. Typical xylem has a radial system composed of ray parenchyma cells and an axial fusiform cells. In angiosperms, comprise vessel elements water transportation libriform fibers mechanical support, while both functions are performed by tracheids other vascular plants such as gymnosperms. Little known about developmental programs evolutionary relationships these cell types. Results Through single-cell laser capture microdissection transcriptomic profiling, we determine lineages stem-differentiating across four divergent woody angiosperms. Based cross-species analyses clusters overlapping trajectories, reveal highly conserved ray, yet variable fusiform, Core eudicots Populus trichocarpa Eucalyptus grandis share nearly identical lineages, whereas more basal angiosperm Liriodendron chinense lineage distinct from that core eudicots. The eudicot Trochodendron aralioides , evolutionarily reversed trait, exhibit strong similarity to rather than fibers. Conclusions This evo-devo framework provides comprehensive understanding formation multiple plant species spanning over hundred million years history.

Язык: Английский

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Gibberellins promote polar auxin transport to regulate stem cell fate decisions in cambium

Nature Plants, Год журнала: 2023, Номер 9(4), С. 631 - 644

Опубликована: Март 30, 2023

Abstract Vascular cambium contains bifacial stem cells, which produce secondary xylem to one side and phloem the other. However, how these fate decisions are regulated is unknown. Here we show that positioning of an auxin signalling maximum within determines cell daughters. The position modulated by gibberellin-regulated, PIN1-dependent polar transport. Gibberellin treatment broadens from towards phloem. As a result, xylem-side daughter preferentially differentiates into xylem, while phloem-side retains identity. Occasionally, this broadening leads direct specification both daughters as consequently, adjacent phloem-identity reverts being cell. Conversely, reduced gibberellin levels favour Together, our data provide mechanism regulates ratio production.

Язык: Английский

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Tissue-specific transcriptome profiling of the Arabidopsis inflorescence stem reveals local cellular signatures

The Plant Cell, Год журнала: 2020, Номер 33(2), С. 200 - 223

Опубликована: Дек. 2, 2020

Abstract Genome-wide gene expression maps with a high spatial resolution have substantially accelerated plant molecular science. However, the number of characterized tissues and growth stages is still small due to limited accessibility most for protoplast isolation. Here, we provide profiles mature inflorescence stem Arabidopsis thaliana covering comprehensive set distinct tissues. By combining fluorescence-activated nucleus sorting laser-capture microdissection next-generation RNA sequencing, transcriptomes xylem vessels, fibers, proximal distal cambium, phloem, phloem cap, pith, starch sheath, epidermis cells. Our analyses classified more than 15,000 genes as being differentially expressed among different revealed known novel tissue-specific cellular signatures. determining overrepresented transcription factor binding regions in promoters genes, identified candidate transcriptional regulators. datasets predict an exceptional allow hypotheses be generated about organization physiological processes. Moreover, demonstrate that information broad range can established at by nuclear mRNA profiling. Tissue-specific values accessed online https://arabidopsis-stem.cos.uni-heidelberg.de/.

Язык: Английский

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The Making of Plant Armor: The Periderm

Annual Review of Plant Biology, Год журнала: 2022, Номер 73(1), С. 405 - 432

Опубликована: Янв. 5, 2022

The periderm acts as armor protecting the plant's inner tissues from biotic and abiotic stress. It forms during radial thickening of plant organs such stems roots replaces function primary protective epidermis endodermis. A wound also to heal protect injured tissues. comprises a meristematic tissue called phellogen, or cork cambium, its derivatives: lignosuberized phellem phelloderm. Research on has mainly focused chemical composition due relevance raw material for industrial processes. Today, there is increasing interest in regulatory network underlying development novel breeding trait improve resilience sequester CO2. Here, we discuss our current understanding formation, focusing aspects evolution, mechanisms ontogenesis, networks phellogen initiation differentiation, future challenges research.

Язык: Английский

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Phloem development

New Phytologist, Год журнала: 2023, Номер 239(3), С. 852 - 867

Опубликована: Май 27, 2023

Summary The evolution of the plant vascular system is a key process in Earth history because it enabled plants to conquer land and transform terrestrial surface. Among tissues, phloem particularly intriguing its complex functionality. In angiosperms, principal components are sieve elements, which transport sap, their neighboring companion cells. Together, they form functional unit that sustains sap loading, transport, unloading. developmental trajectory elements unique among cell types entails selective organelle degradation including enucleation. Meticulous analyses primary, so‐called protophloem Arabidopsis thaliana root meristem have revealed steps element formation at single‐cell resolution. A transcription factor cascade connects specification with differentiation also orchestrates pole patterning via noncell‐autonomous action element‐derived effectors. Reminiscent tissue secondary growth, these involve receptor kinase pathways, whose antagonists guide progression differentiation. Receptor pathways may safeguard by maintaining plasticity files. Our current understanding development A. has reached sufficient detail instruct molecular‐level investigation other organs.

Язык: Английский

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The auxin–PLETHORA 5 module regulates wood fibre development in Populus tomentosa

Nature Plants, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Язык: Английский

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Vascular Cambium: The Source of Wood Formation

Frontiers in Plant Science, Год журнала: 2021, Номер 12

Опубликована: Авг. 18, 2021

Wood is the most abundant biomass produced by land plants and mainly used for timber, pulping, paper making. (secondary xylem) derived from vascular cambium, its formation encompasses a series of developmental processes. Extensive studies in Arabidopsis trees demonstrate that initiation stem cells proliferation differentiation cambial derivative require coordination multiple signals, including hormones peptides. In this mini review, we described recent discoveries on regulation three processes several such as auxin, cytokinins, brassinosteroids, gibberellins, ethylene, TDIF peptide, their cross talk Populus. There exists similar but more complex regulatory network orchestrating cambium development Populus than Arabidopsis. We end up with look at future research prospects perennial woody plants, interfascicular cell regulation.

Язык: Английский

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