Results 61 to 70 of about 26,188 (195)

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

Chemical Analysis of Pollen by FT-Raman and FTIR Spectroscopies

open access: yesFrontiers in Plant Science, 2020
Pollen studies are important for the assessment of present and past environment, including biodiversity, sexual reproduction of plants and plant-pollinator interactions, monitoring of aeroallergens, and impact of climate and pollution on wild communities
Adriana Kenđel   +2 more
doaj   +1 more source

Microsporogenesis and pollen formation in cassava

open access: yes, 2011
This article describes the complete microsporogenesis and pollen formation in cassava (Manihot esculenta Crantz) at the various developmental stages (pollen mother cell, meiosis, tetrads, early free spore, mid uninucleate, late uninucleate, binucleate ...
C. SAUTTER   +9 more
core   +1 more source

Pollen wall formation in Abies concolor and a discussion on wall layer homologies

open access: yes, 1989
Development of the pollen wall in Abies concolor (Gord. & Glen.) Lindl. is documented using ultrastructural techniques. Pollen wall formation is initiated by the deposition of a microspore surface coat and the formation of callosic protrusions in ...
Marie H. Kurmann
core   +1 more source

Biochemical and Immunocytological Characterizations of Arabidopsis Pollen Tube Cell Wall

open access: yes, 2010
International audienceDuring plant sexual reproduction, pollen germination and tube growth require development under tight spatial and temporal control for the proper delivery of the sperm cells to the ovules.
Flavien Dardelle   +13 more
core   +1 more source

Visualization study on uptake and distribution of Pdots in Arabidopsis thaliana pollen

open access: yes上海师范大学学报. 自然科学版
Pollen-mediated genetic transformation enables gene editing and trait improvement with stable inheritance to offspring, demonstrating significant application prospects in crop genetic breeding.
LIU Jiantao   +3 more
doaj   +1 more source

Spermine Regulates Pollen Tube Growth by Modulating Ca2+-Dependent Actin Organization and Cell Wall Structure

open access: yesFrontiers in Plant Science, 2017
Proper growth of the pollen tube depends on an elaborate mechanism that integrates several molecular and cytological sub-processes and ensures a cell shape adapted to the transport of gametes.
Iris Aloisi   +5 more
doaj   +1 more source

Growth Media Induces Variation in Cell Wall Associated Gene Expression in Arabidopsis thaliana Pollen Tube

open access: yesPlants, 2013
The influence of three different pollen germination media on the transcript profile of Arabidopsis pollen tubes has been assessed by real-time PCR on a selection of cell wall related genes, and by a statistical analysis of microarray Arabidopsis pollen ...
Mário Luís da Costa   +2 more
doaj   +1 more source

Transcriptome-based analysis of the effect of the Arabidopsis thaliana tek/ms188 double mutation on pollen wall development

open access: yes上海师范大学学报. 自然科学版
Based on the anther transcriptome data, the regulatory patterns of pollen wall-related genes during anther development in Arabidopsis thalianatek/ms188 mutant were analyzed.
SU Wenxin   +4 more
doaj   +1 more source

Pollen Walls as Adaptive Systems

open access: yesAnnals of the Missouri Botanical Garden, 1979
The structural variation of angiosperm pollen is primarily related to the wall, for the male gametophyte itself is simple in organization and more or less uniform in character throughout the group. The division of the wall into an outer exine and an inner intine is clearly a fundamental feature, as it is in the pollen grains and spores of other ...
openaire   +3 more sources

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