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Mostrando ítems 21-30 de 399
Style morphology and pollen tube pathway
(Springer Berlin Heidelberg, 2017-11)
The style morphology and anatomy vary among different species. Three basic types are: open, closed, and semi-closed. Cells involved in the pollen tube pathway in the different types of styles present abundant endoplasmic ...
Lily Pollen Tubes Pulse According to a Simple Spatial Oscillator.
Polar growth is a fundamental mode of cell morphogenesis observed in nearly all major groups of organisms. Among polarly growing cells, the angiosperm pollen tubes have emerged as powerful experimental systems in large ...
Pollen-specific aquaporins NIP4;1 and NIP4;2 are required for pollen development and pollination in Arabidopsis thaliana
(2016)
In flowers with dry stigmas, pollen development, pollination, and pollen tube growth require spatial and temporal regulation of water and nutrient transport. To better understand the molecular mechanisms involved in ...
Early F-actin disorganization may be signaling vacuole disruption in incompatible pollen tubes of Nicotiana alata
(Landes Bioscience, 2014-10)
Self-incompatibility (SI) systems appeared early in plant evolution as an effective mechanism to promote outcrossing and avoid inbreeding depression. These systems prevent self-fertilization by the recognition and rejection ...
In vitro inhibition of incompatible pollen tubes in Nicotiana alata involves the uncoupling of the F-actin cytoskeleton and the endomembrane trafficking system
(Springer Wien, 2015-01)
In the S-RNase-based self-incompatibility system, subcellular events occurring in the apical region of incompatible pollen tubes during the pollen rejection process are poorly understood. F-actin dynamics and endomembrane ...
Heterospecific pollen transfer from an exotic plant to native plants: assessing reproductive consequences in an Andean grassland
(2016)
Background: The presence of exotic plants increases the heterospecific pollen (HP hereafter) received by native plants and reduces their reproductive output. Aims: We assessed whether the exotic herb Echium vulgare ...
Imaging of calcium dynamics in pollen Tube cytoplasm
(Springer, 2015)
Cytoplasmic calcium [(Ca(2+))cyt] is a central component of cellular signal transduction pathways. In plants, many external and internal stimuli transiently elevate (Ca(2+))cyt, initiating downstream responses that control ...
Proline-rich extensin-like receptor kinases PERK5 and PERK12 are involved in pollen tube growth
(John Wiley & Sons Ltd, 2021-10)
Proline-rich extensin-like receptor kinases (PERKs) belong to the hydroxyproline-rich glycoprotein (HRGP) superfamily known to be involved in many plant developmental processes. Here, we characterized two pollen-expressed ...