scholarly journals Synthetic Strigolactone GR24 Improves Arabidopsis Somatic Embryogenesis through Changes in Auxin Responses

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2720
Author(s):  
Mohamed Elhiti ◽  
Mohammed M. Mira ◽  
Kenny K. Y. So ◽  
Claudio Stasolla ◽  
Kim H. Hebelstrup
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Tissue ◽  
Auxin Signaling ◽  
Induction Phase ◽  
Developmental Phase ◽  
The Novel ◽  
Expression Of Genes ◽  
Embryo Number ◽  
Arabidopsis Mutant

Somatic embryogenesis in Arabidopsis encompasses an induction phase requiring auxin as the inductive signal to promote cellular dedifferentiation and formation of the embryogenic tissue, and a developmental phase favoring the maturation of the embryos. Strigolactones (SLs) have been categorized as a novel group of plant hormones based on their ability to affect physiological phenomena in plants. The study analyzed the effects of synthetic strigolactone GR24, applied during the induction phase, on auxin response and formation of somatic embryos. The expression level of two SL biosynthetic genes, MOREAXILLARY GROWTH 3 and 4 (MAX3 and MAX4), which are responsible for the conversion of carotene to carotenal, increased during the induction phase of embryogenesis. Arabidopsis mutant studies indicated that the somatic embryo number was inhibited in max3 and max4 mutants, and this effect was reversed by applications of GR24, a synthetic strigolactone, and exacerbated by TIS108, a SL biosynthetic inhibitor. The transcriptional studies revealed that the regulation of GR24 and TIS108 on somatic embryogenesis correlated with changes in expression of AUXIN RESPONSIVE FACTORs 5, 8, 10, and 16, known to be required for the production of the embryogenic tissue, as well as the expression of WUSCHEL (WUS) and Somatic Embryogenesis Receptor-like Kinase 1 (SERK1), which are markers of cell dedifferentiation and embryogenic tissue formation. Collectively, this work demonstrated the novel role of SL in enhancing the embryogenic process in Arabidopsis and its requirement for inducing the expression of genes related to auxin signaling and production of embryogenic tissue.

scholarly journals Oxidative status in Medicago truncatula Gaertn. non-embryogenic and embryogenic tissues with particular reference to somatic embryogenesis

2019 ◽  
Vol 140 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Anna Orłowska ◽  
Ewa Kępczyńska
Keyword(s):  
Enzyme Activity ◽  
Somatic Embryogenesis ◽  
Medicago Truncatula ◽  
Defense Mechanisms ◽  
Callus Formation ◽  
Leaf Explants ◽  
Induction Phase ◽  
Ros Scavenging ◽  
Expression Of Genes ◽  
Genes Encoding

Abstract Abiotic stress conditions (e.g., wounding, sterilization) are often together with plant growth regulators (e.g., 2,4-d), considered as one of the most important factors initiating plant somatic embryogenesis (SE). The first goal of this work was to answer whether leaf explants of the Medicago truncatula non-embryogenic (M9) line and its embryogenic variant (M9-10a) respond equally to mechanical and chemical stress by analyzing ROS (reactive oxygen species, e.g., O2•−, H2O2) localization, ROS scavenging enzyme activity and expression of genes encoding these enzymes. In explants of both lines, the stress response induced by wounding and chemical sterilization and the defense reaction during the 1st week of callus growth was similar. These defense mechanisms first involve an increase in SOD and CAT activity, later APX. 2,4-d, present at a low concentration (0.5 µM) during the induction phase (IP), is necessary for embryogenic callus formation and, consequently, for embryo development. This herbicide in higher concentrations causes an increase in O2•− accumulation and in antioxidant enzyme activity; however, it does not block the formation of callus and somatic embryos, though it disturbs these processes. Moreover, inhibition or blocking studied processes by DPI, an inhibitor of NADPH oxidase responsible for the production of O2•− and also lowering the expression of genes encoding the antioxidant enzymes leading to change in their activities, clearly indicate that a certain level of ROS is necessary to induce SE.

ROLE OF THE NOVEL INTRODUCED PAN-INTESTINAL CAPSULE ENDOSCOPY SYSTEM IN CELIAC DISEASE

2019 ◽  
Author(s):  
F Foerster ◽  
K Mönkemüller ◽  
PR Galle ◽  
H Neumann
Keyword(s):  
Celiac Disease ◽  
Capsule Endoscopy ◽  
The Novel

Patterns: Rosamond Lehmann

2018 ◽  
Author(s):  
Vike Martina Plock
Keyword(s):  
Coming Of Age ◽  
Public Image ◽  
Market Forces ◽  
The Novel ◽  
Fashion Industry ◽  
To The Lighthouse ◽  
Fashion Magazines ◽  
Female Authorship ◽  
Rosamond Lehmann

This chapter analyzes the role of fashion as a discursive force in Rosamond Lehmann’s 1932 coming-of-age novel Invitation to the Waltz. Reading the novel alongside such fashion magazines as Vogue, it demonstrates Lehmann’s awareness that 1920s fashion, in spite of its carefully stylized public image as harbinger of originality, emphasized the importance of following preconceived (dress) patterns in the successful construction of modern feminine types. Invitation to the Waltz, it argues, opposes the production of patterned types and celebrates difference and disobedience in its stead. At the same time, the novel’s formal appearance is nonetheless dependent on the very same tenets it criticizes. On closer scrutiny, it is seen to reveal its resemblance to Virginia Woolf’s To the Lighthouse (1927). A tension between imitation and originality determines sartorial fashion choices. This chapter shows that female authorship in the inter-war period was subjected to the same market forces that controlled and sustained the organization of the fashion industry.

SARS-COV2 virus and Coronavirus disease (COVID-19)

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 977-982
Author(s):  
Mohamed J. Saadh ◽  
Bashar Haj Rashid M ◽  
Roa’a Matar ◽  
Sajeda Riyad Aldibs ◽  
Hala Sbaih ◽  
...  
Keyword(s):  
Close Contact ◽  
Antiviral Agents ◽  
Health Concern ◽  
The Novel ◽  
Global Public Health ◽  
Fatal Disease ◽  
Mild Disease ◽  
Life Threatening ◽  
Novel Coronavirus

SARS-COV2 virus causes Coronavirus disease (COVID-19) and represents the causative agent of a potentially fatal disease that is of great global public health concern. The novel coronavirus (2019) was discovered in 2019 in Wuhan, the market of the wet animal, China with viral pneumonia cases and is life-threatening. Today, WHO announces COVID-19 outbreak as a pandemic. COVID-19 is likely to be zoonotic. It is transmitted from bats as intermediary animals to human. Also, the virus is transmitted from human to human who is in close contact with others. The computerized tomographic chest scan is usually abnormal even in those with no symptoms or mild disease. Treatment is nearly supportive; the role of antiviral agents is yet to be established. The SARS-COV2 virus spreads faster than its two ancestors, the SARS-CoV and Middle East respiratory syndrome coronavirus (MERS-CoV), but has lower fatality. In this article, we aimed to summarize the transmission, symptoms, pathogenesis, diagnosis, treatment, and vaccine to control the spread of this fatal disease.

THE ROLE OF ARTISTIC PSYCHOLOGY IN THE METAPHORICAL HARMONY OF MAN AND THE REALITY OF LIFE

2020 ◽  
Vol 2 (3) ◽  
pp. 19-23
Author(s):  
Shakhlo Botirova ◽  
Keyword(s):  
The Novel

In this article , in the novel “Rebellion and obedience” by Ulugbek Hamdam, the author analyzes the artistic psychological description of a person on the path of development in the center of an integral complex metaphorical system of being. The novel “Rebellion and obedience” is based onthe method of metaphorization of reality. In it, a personexperiences vertigo about who he is and what powerful being he possesses. The reason for this is a riot. After much agony, he obeys. Allegedly thus proves its existence. Finds answers to certain riddles

Le premier moment de l’art dans À la recherche du temps perdu de Marcel Proust – une « leçon d’idéalisme » ?

2020 ◽  
pp. 25-40
Author(s):  
Larisa Botnari
Keyword(s):  
Essential Role ◽  
Marcel Proust ◽  
The Self ◽  
Philosophy Of Art ◽  
The Novel ◽  
Philosophical Interpretation ◽  
German Philosopher ◽  
Lost Time ◽  
Aesthetic Thinking

Although very famous, some key moments of the novel In Search of Lost Time, such as those of the madeleine or the uneven pavement, often remain enigmatic for the reader. Our article attempts to formulate a possible philosophical interpretation of the narrator's experiences during these scenes, through a confrontation of the Proustian text with the ideas found in the System of Transcendental Idealism (1800) of the German philosopher F. W. J. Schelling. We thus try to highlight the essential role of the self in Marcel Proust's aesthetic thinking, by showing that the mysterious happiness felt by the narrator, and from which the project of creating a work of art is ultimately born, is similar to the experiences of pure self-consciousness evoked and analyzed by Schellingian philosophy of art.

The role and relationship of mindreading and social attunement in HRI – position statements of interdisciplinary researchers. Workshop HRI'20

2020 ◽  
Author(s):  
Agnieszka Wykowska ◽  
Jairo Pérez-Osorio ◽  
Stefan Kopp
Keyword(s):  
Mental States ◽  
Human Robot Interaction ◽  
Human Interaction ◽  
Artificial Agents ◽  
The Novel ◽  
Robot Interaction ◽  
Novel Coronavirus ◽  
Relationship Of ◽  
The Relationship

This booklet is a collection of the position statements accepted for the HRI’20 conference workshop “Social Cognition for HRI: Exploring the relationship between mindreading and social attunement in human-robot interaction” (Wykowska, Perez-Osorio & Kopp, 2020). Unfortunately, due to the rapid unfolding of the novel coronavirus at the beginning of the present year, the conference and consequently our workshop, were canceled. On the light of these events, we decided to put together the positions statements accepted for the workshop. The contributions collected in these pages highlight the role of attribution of mental states to artificial agents in human-robot interaction, and precisely the quality and presence of social attunement mechanisms that are known to make human interaction smooth, efficient, and robust. These papers also accentuate the importance of the multidisciplinary approach to advance the understanding of the factors and the consequences of social interactions with artificial agents.

Drawing the Written Woman

2014 ◽  
Vol 7 (2) ◽  
pp. 31-63
Author(s):  
Sonia Lagerwall
Keyword(s):  
Historical Novel ◽  
Dynamic Adaptation ◽  
Adaptation Process ◽  
The Novel ◽  
Artistic Training

This article deals with Philippe Druillet's three-volume comic adaptation (1980–1985) of Salammbô, Gustave Flaubert's historical novel from 1862, set three centuries BC. Flaubert was famous for not wanting his texts illustrated: he argued that the preciseness of images would undo the poetic vagueness of his written words. The article examines how Druillet tackles the challenge of graphically representing Flaubert's canonical work without reducing the priestess Salammbô into a given type. The analysis shows a dynamic adaptation process in which Druillet gives a kaleidoscopic form to Flaubert's text. His variation on the Salammbô character foregrounds photography, a medium historically relevant to the novel but also to Druillet's own artistic training. Featuring his character Lone Sloane in the role of Mathô, the adaptation proves to be a highly personal appropriation of the novel, where Druillet enhances an autobiographical dimension of his work previously hinted at in La Nuit and Gaïl.

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