384 search results for “with flowers petra” in the Public website
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Petra Pelkman
Bestuursbureau
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Petra Boudewijn
Faculty of Humanities
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Petra Hogenboom
Faculty of Humanities
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Petra Couvée
Faculty of Humanities
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Petra Evers
Faculty Governance and Global Affairs
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Petra Scheepers
Administratief Shared Service Centre
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Petra Slabber
Universitair Facilitair Bedrijf
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Petra Boerlage
Bestuursbureau
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Petra Penning
Expertisecentrum SOZ
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Petra Nowee
Gelieerde instellingen
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Petra Zevenbergen
ICLON
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Petra Barneveld
Faculteit der Sociale Wetenschappen
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Petra Sijpesteijn
Faculty of Humanities
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Making cards: the language of flowers
Arts and leisure, Arts and leisure
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Petra van der Helm
Faculteit Rechtsgeleerdheid
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Petra van der Laken
Universitaire Bibliotheken Leiden
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Petra van der Weel
Faculteit der Sociale Wetenschappen
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Petra Jochems-Verschuren
Faculty of Humanities
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Petra 't Hart
Faculty of Humanities
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Petra Zuijderduijn-Dijcks
Veiligheid, Gezondheid en Milieu
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Petra van den Bekerom
Faculty Governance and Global Affairs
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Petra de Bruijn
Faculty of Humanities
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Evolution and development of orchid flowers and fruits
To gain more insight into the evolutionary development of orchid flowers and fruits, the orchid species Erycina pusilla was studied. The evolutionary origin of the median petaloid sepal, the callus on the labellum, and the stelidia was studied.
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Petra van Egmond-Herruer
Universitair Facilitair Bedrijf
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Petra Kamer-de Graaf
Bestuursbureau
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Control of Western flower thrips through jasmonate-triggered plant immunity
We showed that constitutive and inducible chemical and morphological defenses against Western flower thrips differ between tomato and chrysanthemum plants.
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thrips- Exploring natural products for early management of western flower thrips
As a contribution to the changing legislation and evolving societal attitudes concerning environmental issues, this project aims to enhance and manipulate the plants’ own natural defense mechanisms against western flower thrips (WFT).
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Evolution and development of flowers, fruits and inflorescences of Phalaenopsis and other orchid species
The study of orchid flowers, fruits, and inflorescences is crucial due to the remarkable diversity of orchid species and their unique adaptations to pollinators and seed dispersers. However, our understanding of the evolution and development of these organs within the orchid family remains limited.
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Environmental and genetic drivers of wood and lignin formation in flowering plants
In this project, we will study the genetic and environmental drivers of woodiness and stem lignification at the level of plant‐to‐gene‐to‐molecule.
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morphological matching among subalpine Asteraceae and their flower-visitors
Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.
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Flower bulbs to treat Alzheimer's
The substance galanthamine from flower bulbs can fight symptoms of Alzheimer's disease. Nadeem Akram investigated how daffodils can optimally produce this natural remedy. PhD defence on 24 June.
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plant cutting treatments to enhance plant protection against western flower thrips
How can we manipulate the biotic and abiotic environment to increase thrips resistance in tomato and chrysanthemum? More specifically we ask: How can plant secondary metabolites that are not soluble in water be delivered to plants in seed coating or root dipping treatment? Can bacteria be used to…
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feedback to improve pest control and sustainability in greenhouse cut-flowers
We examine how soil inoculation influences aboveground organisms (i) directly, and indirectly via (ii) its effects on plant chemistry or volatile emission, or via (iii) mediating the effects of belowground pathogens on aboveground organisms via the shared plant.
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Barbara Gravendeel
Science
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Unique ‘penis plant’ flowers at Hortus
Amorphophallus decus-silvae, or the ‘penis plant’ as it is known, has just flowered at the Hortus botanicus. It flowered for two days, and then the pollen, which the male flowers produced was collected. As far as the plant experts at the Hortus can tell, this was just the third time that this species…
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National flower: The daisy is everywhere thanks to men with mowers
The daisy has been crowned the Netherlands’ national flower. Rogier van Vugt, Head of Horticulture at the Hortus botanicus, explains why the daisy merits its elevation to national symbol.
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Xiamen (CN)
Xiamen is a a city in the Chinese province Fujian. It currently has about 4.3 million citizens in the city. It is therefore the largest city of the province.
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ERC Consolidator Grant for Petra Sijpesteijn
Arabist and papyrologist Petra Sijpesteijn has received a Consolidator Grant from the European Research Council for her research on the early Islamic Empire. The five-year ERC grant will fund the research project
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Rare jade vine flowers in Hortus botanicus in Leiden
The jade vine (Strongylodon macrobotrys) is flowering at the Hortus botanicus in Leiden. The plant started producing multiple flower clusters three weeks ago and the first ones are now in full bloom.
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Saskia as Flora
Rembrandt painted this Flora, the Roman goddess of spring, in 1635. She is on display above the archway leading from the Academy Building to the lush flora of the University’s Hortus Botanicus. Rembrandt, who had his own cabinet of curiosities, almost certainly knew this botanical garden, the oldest…
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Petra Sijpesteijn elected to the Académie des Inscriptions et Belles-Lettres
The Académie des Inscriptions et Belles-Lettres (AIBL), one of the five academies that make up the Institut de France, has elected professor Petra Sijpesteijn as foreign corresponding member (correspondant étranger), to fill the seat of the renowned Egyptologist Edda Bresciani.
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Petra Sijpesteijn elected Corresponding Member of the Austrian Academy of Sciences
In its session of 15 April 2024, the Austrian Academy of Sciences elected professor Petra Sijpesteijn as one of its new Corresponding Members.
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Slavery Reparations: The difficult flowering of an unconstructive demand
On the 13th of December 2017 Ana Lucia Araujo came to Leiden to discuss the long history of the demand for reparations for slavery. In the basement of the Van Stockum bookstore she presented her recent book on this issue and discussed the research project with Karwan Fatah-Black.
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Fewer flowering plants in Dutch nature: national and international media coverage
In Dutch nature, plant species that depend on pollination by insects are disappearing. Environmental scientist Kaixuan Pan shows this after analysing 87 years of measurements from more than 365,000 locations. Several national and international media reported on the study results. Below is an overview…
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Functional analysis of Dof transcription factors controlling heading date and PPDK gene expression in rice
Promotor: P.J.J. Hooykaas, Co-Promotores: P.B.F. Ouwerkerk, M. Wang
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Fruit, flowers and vegetables can be kept longer using new sensor
As fruit and vegetables ripen, ethylene gas is released. Ethylene also influences the speed at which they ripen. Chemist Tom van Dijkman studied how small and inexpensive sensors can be made that measure ethylene concentrations during transportation. PhD defence 12 May 2016.
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Udhruh Archaeological Project
The hinterland of important centres like Petra (Southern Jordan) can provide essential information that contribute to the understanding of their rise, expansion and decline.
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Enduring Christianity in a Muslim world
A project aimed at understanding the complicated process of religious transformation in one of the centres of the early Muslim world.
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Unravelling the genes responsible for life history traits in the giant woody cabbage (Brassica oleracea)
Which genes are involved in woodiness and associated traits such as drought tolerance, flowering time, stem elongation, life span, and plant herbivory, and how do these gene regulatory pathways overlap?
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Verkiezing voor nationale bloem
Nederland heeft geen nationale bloem en daar wil het radioprogramma Vroege Vogels verandering in brengen. Verschillende experts van Universiteit Leiden zijn betrokken bij de verkiezing.