Results 11 to 20 of about 210 (139)

Application of a novel schema for describing fossil fern foliage and investigating taxonomic and morphological change across the Cretaceous-Paleogene boundary in western North America. [PDF]

Am J Bot
Abstract Premise The Chicxulub asteroid impact at the Cretaceous–Paleogene (K–Pg) boundary triggered a mass extinction 66 million years ago. Ferns thrived in the aftermath of the extinction, evidenced by the well‐documented “fern spore spike.” However, fern macrofossil records across the K–Pg boundary are less understood.
Holian FB, Sessa EB, Barclay RS, Dunn RE, Gill JL, Johnson KR, Maccracken SA, Miller IM, Pittermann J, Currano ED.   +9 more
europepmc   +2 more sources

Effective dispersal of fern spore and the ecological relevance of zoochory. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT The mechanisms of fern dispersal are under‐studied and there are few data to support the vectors assumed to drive patterns of sporophyte occurrence and speciation. Although wind is generally the fern spore dispersal vector described in the literature, there has always been competing evidence supporting alternate vectors.
Brock JMR.
europepmc   +2 more sources

PWO proteins are associated with PRC2 since their emergence in vascular plants. [PDF]

New Phytol
Summary The Polycomb repressive complex 2 (PRC2), a conserved histone methyltransferase complex, plays a central role in transcriptional silencing across eukaryotes. Here, we investigate the evolution of PWWP‐DOMAIN INTERACTORS OF POLYCOMBS (PWOs), which interact with PRC2, and examine the conservation of the PWOs‐PRC2 interaction across plant ...
Khan A, Haider S, Sharaf A, Kusová A, Skalák J, Jourdain C, Rennie M, Schrumpfová PP, Hejátko J, Schubert D, Farrona S, Mozgová I.   +11 more
europepmc   +2 more sources

Isolation and characterization of a spore development mutant in Pyropia yezoensis (Rhodophyta) induced via insertional mutagenesis. [PDF]

J Phycol
Abstract Mechanistic elucidation of spore development is essential for understanding reproductive strategies and improving seaweed cultivation. In this study, we isolated a mutant with spore development defects in Pyropia yezoensis (Rhodophyta) from among genetic transformants generated via insertional mutagenesis. We characterized the mutant phenotype
Izumi H, Nakai Y, Uji T, Nagaosa K, Fukuda S, Mizuta H, Saga N.   +6 more
europepmc   +2 more sources

On the cytology of apogamy and apospory.—1. Preliminary note on apogamy [PDF]

Proceedings of the Royal Society of London, 1903
Abstract The phenomena of apogamy and apospory have always been regarded as “short cuts” in the life history of ferns, and the fact that apparently either generation may be directly produced from the other, without the intervention of oosphere or spore respectively, has been taken to indicate that the gametophyte and sporophyte are ...
John Bretland Farmer, J. E. Salvin Moore, L. Digby   +2 more
openaire   +1 more source

Cloning in action: can embryo splitting, induced pluripotency and somatic cell nuclear transfer contribute to endangered species conservation?

Biological Reviews, Volume 98, Issue 4, Page 1225-1249, August 2023., 2023
ABSTRACT The term ‘cloning’ refers to the production of genetically identical individuals but has meant different things throughout the history of science: a natural means of reproduction in bacteria, a routine procedure in horticulture, and an ever‐evolving gamut of molecular technologies in vertebrates.
Aleona Swegen, Ruth Appeltant, Suzannah A Williams   +2 more
wiley   +1 more source

Life cycle and morphogenetic differentiation in heteromorphic cell types of a cosmopolitan marine microalga. [PDF]

New Phytol
Summary Gephyrocapsa huxleyi is a prevalent, bloom‐forming phytoplankton species in the oceans. It exhibits a complex haplodiplontic life cycle, featuring a diploid‐calcified phase, a haploid phase and a third ‘decoupled’ phase produced during viral infection. Decoupled cells display a haploid‐like phenotype, but are diploid.
Bousquet L, Fainsod S, Decelle J, Murik O, Chevalier F, Gallet B, Templin R, Schwab Y, Avrahami Y, Koplovitz G, Ku C, Frada MJ.   +11 more
europepmc   +2 more sources

APOGAMY IN OEligNOTHERA. [PDF]

Science (New York, N.Y.), 1909
n ...
openaire   +3 more sources

Apogamy in the Cyatheaceae [PDF]

Botanical Gazette, 1918
Since the discovery of apogamy in Pteris cretica by FARLOW (3) in I874, it has been observed in about I5 genera and 30 species of the Polypodiaceae. There are records of its occurrence in 3 other families of the Filicales, namely, the Osmundaceae, the Hymenophyllaceae, and the Marsiliaceae.
openaire   +1 more source

Apogamy in Nephrodium [PDF]

Botanical Gazette, 1907
"Reprinted from the Botanical gazette, vol. XLV, no. 5." ; Thesis (Ph. D.)--University of Chicago, 1908? ; Bibliography: p. 312-316. ; Mode of access: Internet.
openaire   +1 more source