Results 91 to 100 of about 8,721 (215)

Characterizing the zebrafish organizer: microsurgical analysis at the early-shield stage [PDF]

open access: yes, 1996
The appearance of the embryonic shield, a slight thickening at the leading edge of the blastoderm during the formation of the germ ring, is one of the first signs of dorsoventral polarity in the zebrafish embryo.
Fraser, Scott E., Shih, John
core  

An updated history of TDIF‐PXY signalling: a study in cell fate and tissue patterning

open access: yesNew Phytologist, Volume 248, Issue 3, Page 1154-1165, November 2025.
Summary Non‐cell autonomous signalling is a mechanism by which stem cells are maintained across the tree of life. In plants, many stem cell populations are regulated by peptide ligands related to CLAVATA3, which are secreted from one cell type and bind to the leucine‐rich repeat domain of a plasma‐membrane‐localised receptor kinase related to CLAVATA1 ...
Qing He   +3 more
wiley   +1 more source

Anatomic structure of one-year-old shoots of Actinidia species

open access: yesІнтродукція Рослин, 2018
Objective – to study the anatomical and morphological structure of oneyearold shoots of the genus Actinidia L. species, which are introduced in Forest-Steppe of Ukraine. Material and methods.
N.V. Skrypchenko   +3 more
doaj   +1 more source

Polymorphic organization in a planktonic graptoloid (Hemichordata: Pterobranchia) colony of Late Ordovician age [PDF]

open access: yes, 2012
Graptolites are common fossils in Early Palaeozoic strata, but little is known of their soft-part anatomy. However, we report a long-overlooked specimen of Dicranograptus aff.
Howe, Michael P.A.   +6 more
core   +2 more sources

Decay stages of Jurassic wood debris from Scotland: evidence for the coevolution of fungal rot, arthropods and the nurse log strategy

open access: yesNew Phytologist, Volume 248, Issue 3, Page 1557-1571, November 2025.
Summary A key feature of extant conifer forests is the high percentage of seeds that germinate and establish on dead wood; in some forests, this can exceed 90%. This deadwood can act as an ideal nursery for young tree species, leading to this type of seedbed being termed ‘nurse logs’.
Ana Julia Sagasti   +3 more
wiley   +1 more source

Evidence of profuse bark shedding in Dicroidium seed ferns (Umkomasiales) from the Triassic of Antarctica

open access: yesPolar Research
During the 11th German Antarctic North Victoria Land Expedition in 2015/16, exceptionally well-preserved permineralized Kykloxylon stems—the wood of the iconic Dicroidium plants of the Gondwanan Triassic—were collected from the Middle to Upper Triassic ...
Philipp Hiller   +4 more
doaj   +1 more source

Expression of Anthocyanin Genes in Potato Periderm [PDF]

open access: yesHortScience, 2004
Anthocyanins are a class of flavonoids that are responsible for pigments in flowers, fruit, and potato periderm. Developing `Norland' potatoes synthesize anthocyanins in periderm tissue when the tubers are mere swollen stolon tips. As the tubers enlarge, anthocyanin accumulation seems to stop, and anthocyanins synthesized early in development seem to ...
Daniel Keifenheim, Cindy Tong*
openaire   +1 more source

Endophytes Are Hidden Producers of Maytansine in Putterlickia Roots [PDF]

open access: yes, 2014
Several recent studies have lent evidence to the fact that certain so-called plant metabolites are actually biosynthesized by associated microorganisms.
Gottfried, Sebastian   +8 more
core   +1 more source

Comprehensive Characterization for Ginsenosides Biosynthesis in Ginseng Root by Integration Analysis of Chemical and Transcriptome

open access: yesMolecules, 2017
Herbgenomics provides a global platform to explore the genetics and biology of herbs on the genome level. Panax ginseng C.A. Meyer is an important medicinal plant with numerous pharmaceutical effects.
Jing-Jing Zhang   +15 more
doaj   +1 more source

Russeting in apple and pear: A plastic periderm replaces a stiff cuticle [PDF]

open access: yes, 2012
Background and aims Russeting in apples (Malus domestica Borkh.) and pears (Pyrus communis L.) is a disorder of the fruit skin that results from microscopic cracks in the cuticle and the subsequent formation of a periderm. To better understand russeting,
Grimm, Eckhard   +2 more
core   +2 more sources

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