Results 131 to 140 of about 21,065 (290)
Extra-gynoecial pollen-tube growth in apocarpous angiosperms is phylogenetically widespread and probably adaptive [PDF]
, 2012 Wang, Xiao-Fan +2 more
core +1 more source
Pollen cytoskeleton during germination and tube growth
, 2005 Sexual reproduction in higher plants requires the development of a special cell protrusion, the so-called pollen tube, which is generated by the male gametophyte. Like other plant cells, the pollen tube contains a conspicuous cytoskeletal apparatus that
CRESTI, MAURO +3 more
core
Cytoskeletal organization and pollen tube growth
, 1997 The growth of pollen tubes is characterized by intense secretory activity in the tip region. This process of vesicle-mediated secretion and tip growth is strongly influenced by calcium gradients. The cytoskeletal apparatus is also critically involved, as
CRESTI, MAURO +2 more
core +1 more source
Archaeometry, EarlyView.ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant +6 more
wiley +1 more source
Actin cytoskeleton regulates pollen tube growth and tropism [PDF]
, 2011 La fertilisation chez les plantes dépend de la livraison des cellules spermatiques contenues dans le pollen à l’ovule. Au contact du stigmate, le grain de pollen s’hydrate et forme une protubérance, le tube pollinique, chargé de livrer les noyaux ...
Bou Daher, Firas
core +2 more sources
Cytoplasmic motors and pollen tube growth
, 1996 The growth of pollen tubes is characterized by an intense cytoplasmic streaming, during which the movements of smaller organelles (like secretory vesicles) and larger ones (including the generative cell and vegetative nucleus) are precisely coordinated ...
CRESTI, MAURO +3 more
core
Boreas, EarlyView.The Megalopolis Basin is located in the central Peloponnese (Greece), a region that is situated along one of the primary Pleistocene biogeographical corridors for intracontinental hominin migration. The basin comprises several hundred metres of Plio‐Pleistocene sediments alternating between clastics and lignites.
Ines J. E. Bludau +13 more
wiley +1 more source
Geophysical Monograph Series, Page 263-304., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside +3 more
wiley +1 more source
Boreas, EarlyView.Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein +19 more
wiley +1 more source
: localization and mode of action during pollen tube growth
, 1994 Flavonols form an important class of flavonoids which serve an essential function during plant reproduction. Flavonoid biosynthesis is initiated by the enzyme chalcone synthase (CHS).
Peter C.H. Hollman +11 more
core +1 more source