WUS and STM homologs are linked to the expression of lateral dominance in the acaulescent Streptocarpus rexii (Gesneriaceae)

Mantegazza, Raffaella; Tononi, Paola; Möller, Michael; Spada, Alberto

doi:10.1007/s00425-009-0965-8

Cited by 16 publications

(22 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we can report that SrARP and SrBP are also expressed in the basal meristem of the macrocotyledon in this species (Figs. 4,5,and 9), and together with SrWUS, another meristem gene expressed in the leaves of S. rexii (Mantegazza et al 2009), it seems that the expression of several meristem genes is spatially and temporally shifted in Streptocarpus compared to Arabidopsis. However, later stages of leaf development, such as acquisition of adaxial/ abaxial polarity are not changed in Streptocarpus, and accordingly, the polarity gene FIL is expressed in S. rexii in a similar pattern as in Arabidopsis (Tononi et al 2010).…”

Section: Knox1 and Arp Genes Are Involved In Macrocotyledon Growthmentioning

confidence: 97%

A complex case of simple leaves: indeterminate leaves co-express ARP and KNOX1 genes

et al. 2010

Self Cite

View full text Add to dashboard Cite

The mutually exclusive relationship between ARP and KNOX1 genes in the shoot apical meristem and leaf primordia in simple leaved plants such as Arabidopsis has been well characterized. Overlapping expression domains of these genes in leaf primordia have been described for many compound leaved plants such as Solanum lycopersicum and Cardamine hirsuta and are regarded as a characteristic of compound leaved plants. Here, we present several datasets illustrating the co-expression of ARP and KNOX1 genes in the shoot apical meristem, leaf primordia, and developing leaves in plants with simple leaves and simple primordia. Streptocarpus plants produce unequal cotyledons due to the continued activity of a basal meristem and produce foliar leaves termed "phyllomorphs" from the groove meristem in the acaulescent species Streptocarpus rexii and leaves from a shoot apical meristem in the caulescent Streptocarpus glandulosissimus. We demonstrate that the simple leaves in both species possess a greatly extended basal meristematic activity that persists over most of the leaf's growth. The area of basal meristem activity coincides with the co-expression domain of ARP and KNOX1 genes. We suggest that the co-expression of ARP and KNOX1 genes is not exclusive to compound leaved plants but is associated with foci of meristematic activity in leaves.

show abstract

Section: Knox1 and Arp Genes Are Involved In Macrocotyledon Growthmentioning

confidence: 97%

A complex case of simple leaves: indeterminate leaves co-express ARP and KNOX1 genes

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…By contrast, in S. rexii, WUS is expressed in the BM (Mantegazza, Tononi, Möller, & Spada, 2009). As for Monophyllaea, there are currently no published data on WUS expression.…”

Section: Thaliana Antirrhinum Majus Nicotiana Benthamiana Oryza Samentioning

confidence: 94%

“…WUS is also involved in the stem cell maintenance in the SAM in typical plants and is not expressed in the primordia of lateral organs. By contrast, in S. rexii , WUS is expressed in the BM (Mantegazza, Tononi, Möller, & Spada, ). As for Monophyllaea , there are currently no published data on WUS expression.…”

Section: Genes Involved In the Peculiar Nature Of The Meristemsmentioning

confidence: 99%

“…For example, in both Monophyllaea and Streptocarpus, the application of exogeneous cytokinin causes both of the cotyledons to grow (Mantegazza et al, 2007(Mantegazza et al, , 2009Nishii, Kuwabara, & Nagata, 2004;Nishii, Wang, Spada, Nagata, & Möller, 2012;Rosenblum & Basile, 1984). This result can be interpreted as the activation of BMs in both cotyledons.…”

Section: Phys I Olog I C Alre Ac Ti On Softhe Meris Temsofone-le Afmentioning

confidence: 99%

See 1 more Smart Citation

One‐leaf plants in the Gesneriaceae: Natural mutants of the typical shoot system

Kinoshita

Tsukaya

2018

Dev Growth Differ

View full text Add to dashboard Cite

The aerial part of seed plants is called the shoot, which is composed of stems, leaves, and axial buds. These are produced by indeterminate activity in the shoot apical meristem (SAM), whereas the morphogenesis of leaves depends on determinate activity of leaf meristems. However, one‐leaf plants in the Gesneriaceae family (eudicots) do not have a typical SAM and do not produce new organs when in the vegetative phase. Instead, they have one cotyledon whose growth is indeterminate. This peculiar development is supported by the groove meristem, which corresponds to the canonical SAM, and the basal meristem, which corresponds to the typical leaf meristem. However, the former does not produce any organ and the latter is active indeterminately. Gene expression and physiological analyses have been conducted in an effort to determine the molecular nature of this peculiar organogenesis. This review summarizes the current understanding of the development of one‐leaf plants to provide future perspectives in this field of research.

show abstract

“…Here we trace YABBY expression in the acaulescent Streptocarpus species Streptocarpus rexii. Several previous developmental and molecular studies have focused on this species (Harrison et al 2005;Mantegazza et al 2007;Nishii and Nagata 2007;Mantegazza et al 2009) and therefore S. rexii provides a well-established system to shed light on the molecular pathway/s involved in the development of anisocotyly and acaulescence. In this paper we focus on the leaf/ phyllomorph development showing that the macrocotyledon of S. rexii is partially unifacial and that the BM development is associated with an altered expression of the YABBY gene ortholog SrGRAM (Streptocarpus rexii GRAMINIFOLIA), suggesting a role of this gene in the intercalary lamina expansion in S. rexii.…”

Section: Introductionmentioning

confidence: 99%

GRAMINIFOLIA homolog expression in Streptocarpus rexii is associated with the basal meristems in phyllomorphs, a morphological novelty in Gesneriaceae

Tononi

Möller

Bencivenga

et al. 2010

Evolution and Development

Self Cite

View full text Add to dashboard Cite

Streptocarpus is a genus showing great variation in vegetative plant architecture and hence provides an attractive system to study the evolution of morphological diversity. Besides species showing an orthodox caulescent plant organization, producing leaves from a conventional shoot apical meristem (SAM), there are species whose body plan is composed of units (phyllomorphs) consisting of a petiole-like structure and a lamina that has the ability of continued growth. The first of these units is the macrocotyledon, derived from the continued growth of one of the two cotyledons by the activity of a basal meristem (BM), whereas further phyllomorphs develop from a SAM-like meristem. We carried out anatomical and morphological studies on the macrocotyledon of Streptocarpus rexii showing that the lamina has a bifacial structure, whereas the petiolode is partially unifacial. YABBY transcription factors are known to be involved in organ polarity and also promote lamina growth. We characterized the expression of SrGRAM, an ortholog of the YABBY genes GRAMINIFOLIA (GRAM) and FILAMENTOUS FLOWER (FIL), in S. rexii by in situ hybridization and RT-PCR. Gene expression pattern during embryogenesis was found to be conserved between SrGRAM and FIL from Arabidopsis. During subsequent seedling development SrGRAM expression in S. rexii was closely associated with the activity of the BM of the macrocotyledon and consecutively produced phyllomorphs, whereas it was excluded from the SAM-like meristem. Our results suggest that SrGRAM acts in intercalary growth and that an altered regulation of SrGRAM may underlay the evolution of the BM in S. rexii.

show abstract

WUS and STM homologs are linked to the expression of lateral dominance in the acaulescent Streptocarpus rexii (Gesneriaceae)

Cited by 16 publications

References 43 publications

A complex case of simple leaves: indeterminate leaves co-express ARP and KNOX1 genes

A complex case of simple leaves: indeterminate leaves co-express ARP and KNOX1 genes

One‐leaf plants in the Gesneriaceae: Natural mutants of the typical shoot system

GRAMINIFOLIA homolog expression in Streptocarpus rexii is associated with the basal meristems in phyllomorphs, a morphological novelty in Gesneriaceae

Contact Info

Product

Resources

About