Origin and development of the cryptic shoot meristem in <i>Zeylanidium lichenoides</i> (Podostemaceae)

Katayama, Natsu; Kato, Masahiro; Yamada, Toshihiro

doi:10.3732/ajb.1200571

Cited by 8 publications

(10 citation statements)

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“…To do this, we need to look for organ identity genes in order to define the structural categories clearly. For example, the KNOX/ARP module (as used by Katayama et al ., 2010 , 2013 in Podostemaceae) helps with the determination of the leaf as a determinate unit, and the shoot as an indeterminate module. This approach seems to have promise in the cases where control genes for organ identity have been shown to exist ( Kirchoff et al ., 2008 , Langdale and Harrison, 2008 ; Chormanski and Richards, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, Katayama et al. ( 2010 , 2013 ) identified the ‘leaves’ in Podostemoideae as ‘stem–leaf mixed organs’. This appellation is meant to indicate that these structures have some features of leaves, and some of stems, probably due to their unusual gene expression pattern and the lack of obvious SAMs ( Kato, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

“…, 2005 ; Katayama et al. , 2008 , 2010 , 2013 ; Koi and Kato, 2010 ), the leaf primordium in vegetative shoots develops from the base of the opposing second youngest leaf primordium. The initiation of a new leaf primordium appears to be associated with degeneration of neighbouring cells, as shown by Imaichi et al.…”

Section: The River-weed Puzzle Part 2 Podostemaceae-podostemoideae:mentioning

confidence: 99%

“…Katayama et al. ( 2010 , 2013 ) investigated the mechanisms underlying shoot development in Podostemaceae by expression analysis of key developmental regulatory gene orthologues in model eudicots. STM ( SHOOT MERISTEMLESS ) and WUS are necessary for the formation and maintenance of the SAM in eudicots (including arabidopsis), and ARP ( ASYMMETRIC LEAVES1/ROUGH SHEATH2/PHANTASTICA ) promotes leaf identity ( Gallois et al.…”

Section: The River-weed Puzzle Part 2 Podostemaceae-podostemoideae:mentioning

confidence: 99%

“…According to the evolutionary model proposed by Katayama et al. ( 2010 , 2011 , 2013 ), the shoots in Podostemoideae grow by repetitive formation of stem–leaf mixed organs and this pattern is derived from the sympodial shoot branching of Tristichoideae and Weddellinoideae. The early loss of embryonic shoot and root meristems (i.e.…”

Section: The River-weed Puzzle Part 2 Podostemaceae-podostemoideae:mentioning

confidence: 99%

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Evolution of unusual morphologies in Lentibulariaceae (bladderworts and allies) and Podostemaceae (river-weeds): a pictorial report at the interface of developmental biology and morphological diversification

Rutishauser

2015

Ann Bot

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Background Various groups of flowering plants reveal profound (‘saltational’) changes of their bauplans (architectural rules) as compared with related taxa. These plants are known as morphological misfits that appear as rather large morphological deviations from the norm. Some of them emerged as morphological key innovations (perhaps ‘hopeful monsters’) that gave rise to new evolutionary lines of organisms, based on (major) genetic changes.Scope This pictorial report places emphasis on released bauplans as typical for bladderworts (Utricularia, approx. 230 secies, Lentibulariaceae) and river-weeds (Podostemaceae, three subfamilies, approx. 54 genera, approx. 310 species). Bladderworts (Utricularia) are carnivorous, possessing sucking traps. They live as submerged aquatics (except for their flowers), as humid terrestrials or as epiphytes. Most Podostemaceae are restricted to rocks in tropical river-rapids and waterfalls. They survive as submerged haptophytes in these extreme habitats during the rainy season, emerging with their flowers afterwards. The recent scientific progress in developmental biology and evolutionary history of both Lentibulariaceae and Podostemaceae is summarized.Conclusions Lentibulariaceae and Podostemaceae follow structural rules that are different from but related to those of more typical flowering plants. The roots, stems and leaves – as still distinguishable in related flowering plants – are blurred (‘fuzzy’). However, both families have stable floral bauplans. The developmental switches to unusual vegetative morphologies facilitated rather than prevented the evolution of species diversity in both families. The lack of one-to-one correspondence between structural categories and gene expression may have arisen from the re-use of existing genetic resources in novel contexts. Understanding what developmental patterns are followed in Lentibulariaceae and Podostemaceae is a necessary prerequisite to discover the genetic alterations that led to the evolution of these atypical plants. Future molecular genetic work on morphological misfits such as bladderworts and river-weeds will provide insight into developmental and evolutionary aspects of more typical vascular plants.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: The River-weed Puzzle Part 2 Podostemaceae-podostemoideae:mentioning

confidence: 99%

Section: The River-weed Puzzle Part 2 Podostemaceae-podostemoideae:mentioning

confidence: 99%

Section: The River-weed Puzzle Part 2 Podostemaceae-podostemoideae:mentioning

confidence: 99%

See 3 more Smart Citations

Evolution of unusual morphologies in Lentibulariaceae (bladderworts and allies) and Podostemaceae (river-weeds): a pictorial report at the interface of developmental biology and morphological diversification

Rutishauser

2015

Ann Bot

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Morphological Misfits and the Architecture of Development

Minelli

2015

Interdisciplinary Evolution Research

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Plant developmental oddities

Pozzi,

Brambilla,

Gaiti

et al. 2024

Planta

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Main conclusion Plants lacking shoot apical meristem develop with unique body shapes, suggesting rewiring of developmental genes. This loss of the meristem is likely influenced by a combination of environmental factors and evolutionary pressures. Abstract This study explores the development of plant bodies in three families (Podostemaceae, Lemnaceae, and Gesneriaceae) where the shoot apical meristem (SAM), a key structure for growth, is absent or altered. The review highlights alternative developmental strategies these plants employ. Also, we considered alternative reproduction in those species, namely through structures like turions, fronds, or modified leaves, bypassing the need for a SAM. Further, we report on studies based on the expression patterns of genes known to be involved in SAM formation and function. Interestingly, these genes are still present but expressed in atypical locations, suggesting a rewiring of developmental networks. Our view on the current literature and knowledge indicates that the loss or reduction of the SAM is driven by a combination of environmental pressures and evolutionary constraints, leading to these unique morphologies. Further research, also building on Next-Generation Sequencing, will be instrumental to explore the genetic basis for these adaptations and how environmental factors influence them.

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Origin and development of the cryptic shoot meristem in Zeylanidium lichenoides (Podostemaceae)

Cited by 8 publications

References 50 publications

Evolution of unusual morphologies in Lentibulariaceae (bladderworts and allies) and Podostemaceae (river-weeds): a pictorial report at the interface of developmental biology and morphological diversification

Evolution of unusual morphologies in Lentibulariaceae (bladderworts and allies) and Podostemaceae (river-weeds): a pictorial report at the interface of developmental biology and morphological diversification

Morphological Misfits and the Architecture of Development

Plant developmental oddities

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