Results 61 to 70 of about 24,573 (227)

A biological nanofoam: The wall of coniferous bisaccate pollen

open access: yesScience Advances, 2022
The outer layer of the pollen grain, the exine, plays a key role in the survival of terrestrial plant life. However, the exine structure in different groups of plants remains enigmatic. Here, modern and fossil coniferous bisaccate pollen were examined to investigate the detailed three-dimensional structure and properties of the pollen wall.
Ruxandra Cojocaru   +8 more
openaire   +7 more sources

New insights into bee pollen: Nutrients, phytochemicals, functions and wall-disruption.

open access: yesFood Research International
Bee pollen is hailed as a treasure trove of human nutrition and has progressively emerged as the source of functional food and medicine. This review conducts a compilation of nutrients and phytochemicals in bee pollen, with particular emphasis on some ...
J. Qiao   +7 more
semanticscholar   +1 more source

Pollen Cell Wall Patterns Form from Modulated Phases [PDF]

open access: yesCell, 2019
The ornately geometric walls of pollen grains have inspired scientists for decades. We show that the evolved diversity of these patterns is entirely recapitulated by a biophysical model in which an initially uniform polysaccharide layer in the extracellular space, mechanically coupled to the cell membrane, phase separates to a spatially modulated state.
Asja, Radja   +3 more
openaire   +2 more sources

Combined cytological and transcriptomic analysis reveals a nitric oxide signaling pathway involved in cold-inhibited Camellia sinensis pollen tube growth

open access: yesFrontiers in Plant Science, 2016
Nitric oxide (NO) as a signaling molecule plays crucial roles in many abiotic stresses in plant development processes, including pollen tube growth. Here, the signaling networks dominated by NO during cold stress that inhibited Camellia sinensis pollen ...
Weidong eWang   +8 more
doaj   +1 more source

Pollen wall development in Olea europaea L. [PDF]

open access: yesNew Phytologist, 1988
summaryThe ontogeny of the olive pollen grain (Olea europaea L.) wall is related to the structural changes which take place during the various stages of pollen grain development. The tetrad stage sees the deposition of the primexine, with probacules forming by deposition of material adjacent to the plasmalemma.
Fernández, Mari Carmen   +1 more
openaire   +3 more sources

Genome-wide analyses of late pollen-preferred genes conserved in various rice cultivars and functional identification of a gene involved in the key processes of late pollen development

open access: yesRice, 2018
Background Understanding late pollen development, including the maturation and pollination process, is a key component in maintaining crop yields. Transcriptome data obtained through microarray or RNA-seq technologies can provide useful insight into ...
Sunok Moon   +8 more
doaj   +1 more source

The cell wall of the pollen mother cell at the tetrad stage in Convallaria majalis L.

open access: yesActa Societatis Botanicorum Poloniae, 2014
The cell wall at the tetrad stage in Convallaria majalis L. has been studied by light microscope histochemical techniques. The standard PAS reaction has shown the persistence of the primary pecto-cellulosic pollen mother cell wall localized around the ...
Maria Charzyńska, Iwona Pannenko
doaj   +1 more source

Home - About - Disclaimer - Privacy