Deposition of Cytokinesis‐Related Callose in Riella helicophylla and Arabidopsis thaliana. Effects of Photolytically Altered Nifedipine1

Scherp, Peter; Grotha, Rüdiger; Kutschera, U.

doi:10.1055/s-2001-16458

Cited by 10 publications

(20 citation statements)

References 21 publications

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“…Mont. were raised in glass vials as previously described (Stange, 1984;Scherp et al, 2001b). The experiments described here were carried out with 8-day-old gemmalings ( Fig.…”

Section: Plant Materialsmentioning

confidence: 99%

“…The nitroso-derivative of photolysed nifedipine (ND-NIF) was obtained from irradiated nifedipine as described by Scherp et al (2001b).…”

Section: Chemicalsmentioning

confidence: 99%

“…In a previous study, we showed that callose deposition in the cell plates and juvenile cell walls of photosynthetically active tissues of Riella and Arabidopsis thaliana is enhanced when the photolysis product of nifedipine is applied at concentrations of 10-100 µM (Scherp, Grotha & Kutschera, 2001b). The calcium antagonist nifedipine degrades into several compounds when irradiated with UV light at 365 nm.…”

Section: Introductionmentioning

confidence: 97%

“…The calcium antagonist nifedipine degrades into several compounds when irradiated with UV light at 365 nm. Amongst these photolysis products, the nitroso-derivative (ND-NIF) was identified as the active compound responsible for the T-, H-and net-like callose depositions in cell plates (Scherp et al, 2001b). In addition, it was shown that only the molecule containing the nitroso-group was capable of inducing this effect; the corresponding nitro-derivative was inactive (Scherp et al, 2001b).…”

Section: Introductionmentioning

confidence: 98%

“…The tissue organization (one cell layer) and the short reproduction time make Riella an ideal plant model. It has been studied with respect to cellular development for several decades (Schult, 1962;Lehmann & Schulz, 1969;Grotha, 1983Grotha, , 1986Stange, 1984;Scherp et al, 2001bScherp et al, , 2002. In the second part of this investigation we compared the effects of the simplest aromatic nitroso-compound, nitrosobenzene, with the well-known action of ND-NIF in gemmalings of Riella (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Clonal distribution, fertility and sex ratios of the mossPlagiomnium affine(Bland.) T.Kop. in forests of contrasting age

Cronberg¹,

Andersson²,

Wyatt³

et al. 2003

Journal of Bryology

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The vegetative life cycle of the aquatic liverwort Riella helicophylla consists of three stages: adult plantlet, gemma and gemmaling (asexual reproductive structure). In meristematic cells of 8-day-old gemmalings that were grown in a 12 h light/12 h dark-cycle, the number of callosic cell plates displayed a minimum at 2 pm (day) and a maximum at 2 am (night). We compared the effects of two drugs on the enhancement of callose biosynthesis: the nitroso-derivative of the calcium antagonist nifedipine and the simplest aromatic nitroso-compound, nitrosobenzene. Callose synthesis (deposition of b-1,3-glucan) was promoted in cell plates by both substances. Moreover, nitrosobenzene is capable of inducing callose synthesis in juvenile walls of elongating cells, whereas the effect of nifedipine is restricted to the meristem. T-, H-and net-like callose structures could be observed in the meristem of drug-treated gemmalings. Our results indicate that the differences in the observed cytotoxic effects depend on the steric properties (chemical structure) and thus the reactive behaviours of the two nitroso-compounds.

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“…Mont. were raised in glass vials as previously described (Stange, 1984;Scherp et al, 2001b). The experiments described here were carried out with 8-day-old gemmalings ( Fig.…”

Section: Plant Materialsmentioning

confidence: 99%

“…The nitroso-derivative of photolysed nifedipine (ND-NIF) was obtained from irradiated nifedipine as described by Scherp et al (2001b).…”

Section: Chemicalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Clonal distribution, fertility and sex ratios of the mossPlagiomnium affine(Bland.) T.Kop. in forests of contrasting age

Cronberg¹,

Andersson²,

Wyatt³

et al. 2003

Journal of Bryology

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show abstract

Integrative taxonomy of the model liverwort Riella helicophylla (Riellaceae, Sphaerocarpales) reveals its extreme rarity and an overlooked widespread new species, R. macrocarpa

Segarra‐Moragues

Puche

Sabovljević

et al. 2022

TAXON

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Riella (Riellaceae) is a genus of rare, ephemeral, aquatic liverworts that includes some taxa specialized in growing submerged in brackish, seasonal water ponds and lagoons. One of these species, Riella helicophylla is the type of the genus. Apart from being of conservation concern, it has been used as a model organism for cytological and physiological processes. The species was described from Algeria in the mid‐nineteenth century and was not found elsewhere for almost a century, when it was discovered in central Spain. Nonetheless, those new populations were considered morphologically different and served to describe a new variety (var. macrocarpa), and a form (f. latealata) of the latter. The number of population records increased considerably in the following decades, especially in the late twentieth century; at the same time, it was discovered in several countries throughout the Mediterranean basin. Those reports, however, did not account for its infraspecific distinction. As part of a broader study of the genus, in this work, we have revisited the taxonomy of R. helicophylla based on an integrative approach considering morphological and molecular DNA sequence data. Our broadly sampled study revealed that R. helicophylla includes two morphotypes corresponding with the previously recognized varieties of this species. These varieties differ consistently in a number of morphological gametophytic and spore traits. Riella helicophylla was resolved as paraphyletic in phylogenies based on nuclear and plastid DNA sequences. The accessions clustered in two monophyletic clades in concert with morphology, supporting their recognition at the species level. Accordingly, a new combination is proposed, R. macrocarpa, which includes the neglected R. helicophylla var. macrocarpa and R. helicophylla var. macrocarpa f. latealata. Lectotypes are designated for the two latter taxa and for R. helicophylla. The two species are fully described and illustrated, and an updated identification key of the Mediterranean species is included. Updated information on the conservation status of both species is provided.

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Callose in Abiotic Stress

Staß

Horst

2009

Chemistry, Biochemistry, and Biology of 1-3 Beta Glucans and Related Polysaccharides

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Deposition of Cytokinesis‐Related Callose in Riella helicophylla and Arabidopsis thaliana. Effects of Photolytically Altered Nifedipine¹

Cited by 10 publications

References 21 publications

Clonal distribution, fertility and sex ratios of the mossPlagiomnium affine(Bland.) T.Kop. in forests of contrasting age

Clonal distribution, fertility and sex ratios of the mossPlagiomnium affine(Bland.) T.Kop. in forests of contrasting age

Integrative taxonomy of the model liverwort Riella helicophylla (Riellaceae, Sphaerocarpales) reveals its extreme rarity and an overlooked widespread new species, R. macrocarpa

Callose in Abiotic Stress

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