Topic
Lunularia
About: Lunularia is a research topic. Over the lifetime, 65 publications have been published within this topic receiving 964 citations.
Papers published on a yearly basis
Papers
TL;DR: Light break experiments by Wilson and Schwabe3 using narrow wave bands at 735 nm and 650 nm have shown that the day-length response is controlled by phytochrome, which has suggested that dormancy is induced by an endogenous inhibitor.
Abstract: THE growth of the Israel strain Lunularia is highly sensitive to photoperiod1,2 and, in long day conditions, particularly at high temperatures, it rapidly becomes dormant. The dormant thalli can be preserved in the air-dry condition for several years without losing their capacity to resume growth, although thalli growing actively in short day are killed by dry conditions. Light break experiments by Wilson and Schwabe3 using narrow wave bands at 735 nm and 650 nm have shown that the day-length response is controlled by phytochrome, which has suggested that dormancy is induced by an endogenous inhibitor.
75 citations
TL;DR: It is demonstrated here that L. cruciata compartmentalizes cadmium in the vacuoles of the phototosynthetic parenchyma by means of aphytochelatin-mediated detoxification strategy, and possesses a phytOChelatin synthase that is activated by cad mium and homeostatic concentrations of iron(II) and zinc.
Abstract: Lunularia cruciata occupies a very basal position in the phylogenetic tree of liverworts, which in turn have been recognized as a very early clade of land plants. It would therefore seem appropriate to take L. cruciata as the startingpoint for investigating character evolution in plants' metal(loid) response. One of the strongest evolutionary pressures for land colonization by plants has come from potential access to much greater amounts of nutritive ions from surface rocks, compared to water. This might have resulted in the need to precisely regulate trace element homeostasis and to minimize the risk of exposure to toxic concentrations of certain metals, prompting the evolution of a number of response mechanisms, such as synthesis of phytochelatins, metal(loid)-binding thiol-peptides. Accordingly, if the ability to synthesize phytochelatins and the occurrence of an active phytochelatin synthase are traits present in a basal liverwort species, and have been even reinforced in 'modern' tracheophytes, e.g. Arabidopsis thaliana, then such traits would presumably have played an essential role in plant fitness over time. Hence, we demonstrated here that: (i) L. cruciata compartmentalizes cadmium in the vacuoles of the phototosynthetic parenchyma by means of a phytochelatin-mediated detoxification strategy, and possesses a phytochelatin synthase that is activated by cadmium and homeostatic concentrations of iron(II) and zinc; and (ii) A. thaliana phytochelatin synthase displays a higher and broader response to several metal(loid)s [namely: cadmium, iron(II), zinc, copper, mercury, lead, arsenic(III)] than L. cruciata phytochelatin synthase.
61 citations
48 citations
TL;DR: By gas-liquid chromotography and thin layer chromatography, an endogenous growth inhibitor of Lunularia cruciata has been detected in seven other representatives of the class of liverworts and evidence for the identity of the previously isolated, but unidentified, endogenous growth inhibitors of Marchantia polymorpha and lunularic acid is presented.
Abstract: By gas-liquid chromotography and thin layer chromatography, an endogenous growth inhibitor of Lunularia cruciata has been detected in seven other representatives of the class of liverworts. All liverworts so far examined have been found to contain lunularic acid. Evidence for the identity of the previously isolated, but unidentified, endogenous growth inhibitor of Marchantia polymorpha and lunularic acid is presented.
45 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 1 |
| 2019 | 3 |
| 2018 | 2 |
| 2017 | 1 |
| 2015 | 1 |