Short Communication. An efficient axillary shoots propagate system for the living fossil plant - Wollemi pine (Wollemia nobilis)

Niu, Yuhua; Du, Junbo; Zhang, Q.; Pei, Xinwu; Zhan, Xi

doi:10.5424/fs/2013223-03997

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…Several authors have attempted to micropropagate various species of the Araucariaceae using small diameter stem segments, including Burrows et al [94] (9 Araucaria spp., 1 Agathis sp. ), Sehgal et al [102] (Araucaria columnaris), Iritani et al [60] (Araucaria angustifolia), Gough et al [103] (Agathis australis), Sarmast et al [104] (Araucaria heterophylla) and Niu et al [105] (Wollemia nobilis). These explants usually contained several nodes and internodes and buds developed from the axillary meristems.…”

Section: Conifer Micropropagationmentioning

confidence: 99%

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Gymnosperm Resprouting—A Review

Burrows

2021

Plants

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Gymnosperms are generally regarded as poor resprouters, especially when compared to angiosperms and particularly following major disturbance. However, is it this clear-cut? This review investigates two main aspects of gymnosperm resprouting: (i) various papers have provided exceptions to the above generalization—how frequent are these exceptions and are there any taxonomic trends?; and (ii) assuming gymnosperms are poor resprouters are there any anatomical or physiological reasons why this is the case? Five of six non-coniferous gymnosperm genera and 24 of 80 conifer genera had at least one species with a well-developed resprouting capability. This was a wider range than would be expected from the usual observation ‘gymnosperms are poor resprouters’. All conifer families had at least three resprouting genera, except the monospecific Sciadopityaceae. Apart from the aboveground stem, buds were also recorded arising from more specialised structures (e.g., lignotubers, tubers, burls and underground stems). In some larger genera it appeared that only a relatively small proportion of species were resprouters and often only when young. The poor resprouting performance of mature plants may stem from a high proportion of apparently ‘blank’ leaf axils. Axillary meristems have been recorded in a wide range of conifer species, but they often did not form an apical dome, leaf primordia or vascular connections. Buds or meristems that did form often abscised at an early stage. While this review has confirmed that conifers do not resprout to the same degree as angiosperms, it was found that a wide diversity of gymnosperm genera can recover vegetatively after substantial disturbance. Further structural studies are needed, especially of: (i) apparently blank leaf axils and the initial development of axillary meristems; (ii) specialised regeneration structures; and (iii) why high variability can occur in the resprouting capacity within species of a single genus and within genera of the same family.

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Section: Conifer Micropropagationmentioning

confidence: 99%

“…Their progenitor meristems appeared to be endogenous but, as indicated above, were exogenous. Often medium to high concentrations of cytokinins, which can lead to enhanced axillary branching in dicotyledonous tree species, led to the formation of distorted buds [94,104,105]. A single bud developed in each axil.…”

Section: Conifer Micropropagationmentioning

confidence: 99%

Gymnosperm Resprouting—A Review

Burrows

2021

Plants

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Untargeted and targeted metabolomics to understand plant growth regulation and evolution in Wollemi pine (Wollemia nobilis)

Giebelhaus

Biggs

Murch

et al. 2023

Botany

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Wollemi Pine (Wollemia nobilis (Jones, Hill, Allen)) is a living fossil, known only through fossil records until its 1994 discovery in Australia. Wollemi Pine is closely related to Norfolk Island pine (Araucaria heterophylla (Salisb.) Franco) making it an interesting system to study metabolic evolution. We employed untargeted liquid chromatography mass spectrometry-based (LC-MS) metabolomics, with chemometrics, pathway analysis, and our novel plant growth regulator (PGR) putative identification tool (HormonomicsDB) to explore the metabolomes of both species. We identified PGR conjugates, and found cytokinin, zeatin, and brassinosteroid pathways to be overrepresented in Wollemi Pine tissues, suggesting these PGRs play an important role in it’s survival. Melatonin, a proposed ancient and stress-related PGR was not identified in untargeted analysis of either species. Based on our untargeted results we employed targeted LC-MS to quantify brassinolide and confirm the absence or presence of melatonin in Wollemi and Norfolk Island pine. Both species had similar concentrations of brassinolide. While Wollemi Pine had significantly higher melatonin levels than Norfolk Island. High levels of melatonin and brassinolide in Wollemin pine supports the hypothesis that these are ancient PGRs that conferred an evolutionary advantage in Wollemi, allowing it to persist.

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Short Communication. An efficient axillary shoots propagate system for the living fossil plant - Wollemi pine (Wollemia nobilis)

Cited by 2 publications

References 10 publications

Gymnosperm Resprouting—A Review

Gymnosperm Resprouting—A Review

Untargeted and targeted metabolomics to understand plant growth regulation and evolution in Wollemi pine (Wollemia nobilis)

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