Results 51 to 60 of about 572 (156)

Reproductive studies on ipecac (Cephaelis ipecacuanha (Brot.) A. Rich; Rubiaceae): meiotic behavior and pollen viability

Brazilian Journal of Biology
Reproductive studies were carried out on Brazilian accessions of ipecac, Cephaelis ipecacuanha. Meiotic behavior was studied using the squashing technique.
M. M. Souza, E. R. Martins, T. N. S. Pereira, L. O. Oliveira   +3 more
doaj   +1 more source

Anther and ovule development of Clematis serratifolia (Ranunculaceae)-with new formation types in megaspore and nucellus.

PLoS ONE, 2020
Morphological indices of vegetative organs or reproductive organs, which are often used to analyze the evolution and classify Clematis, indicate that Clematis serratifolia and C. glauca could be related members at similar evolutionary levels.
Yi Yang, Jie Sun, Xiao Guo, Kuiling Wang, Qinghua Liu, Qingchao Liu   +5 more
doaj   +1 more source

3D Electron Microscopy Reveals the Structural Complexity of the Intravacuolar Membranous Network in Cyrilia lignieresi‐Infected Erythrocytes of the Fish Synbranchus marmoratus

Journal of Eukaryotic Microbiology, Volume 72, Issue 4, July/August 2025.
ABSTRACT This study employs advanced three‐dimensional electron microscopy techniques, including Transmission Electron Microscopy (TEM) tomography and freeze‐fracture imaging via scanning electron microscopy (SEM), to investigate the ultrastructural organization of Cyrilia lignieresi‐infected red blood cells (iRBCs) in the host fish Synbranchus ...
Brenda Santarém Fachetti, Maíra Turiel‐Silva, Camila Wendt, Hilton Tulio Costi, Edilene Oliveira da Silva, Ana Paula Drummond Rodrigues, Wanderley de Souza, Kildare Miranda, José Antonio Picanço Diniz   +8 more
wiley   +1 more source

Patterns and Drivers of Pollen Temperature Tolerance

Plant, Cell &Environment, Volume 48, Issue 2, Page 1366-1379, February 2025.
ABSTRACT Pollen, a pivotal stage in the plant reproductive cycle, is highly sensitive to temperature fluctuations, impacting seed quality and quantity. While the importance of understanding pollen temperature limits (Tmin, Topt, Tmax – collectively PTLs) is recognized, a comprehensive synthesis of underlying drivers is lacking.
Donam Tushabe, Sergey Rosbakh
wiley   +1 more source

The male germ unit association is independently regulated of GUM in Arabidopsis thaliana

Plant Direct, Volume 8, Issue 7, July 2024.
Abstract Cytoplasmic projections (CPs) formed by the generative and sperm cells link the male gametes with the vegetative cell (VC) nucleus, which are required to build the male germ unit (MGU) assemblage in the angiosperm pollen grain. As molecular and genetic controls underlying CP development and formation of the MGU are unknown, it was hypothesized
Abdur Rauf, Anbang Wang, Yujia Li, Zhihao Lian, Shouxing Wei, Kashmala Jabbar, Muhammad Wisal, Ikramullah Khan, Muhammad Khalid, Jingyang Li   +9 more
wiley   +1 more source

Male gametogenesis in flowering plants

Frontiers in Sustainable Food Systems
The life cycles of plants are characterized by significant alternations between the diploid sporophytic and the haploid gametophytic generations. Meiosis and fertilization are the prerequisites for achieving the alternation of generations.
Dan-Lu Cui, Chun-Xia Xu, Ping Wang, Tian-Ying Gao, Bo Wang, Tian-Ying Yu   +5 more
doaj   +1 more source

Symmetric pollen mitosis I and suppression of pollen mitosis II prevent pollen development in Brachiaria jubata (Gramineae)

Brazilian Journal of Medical and Biological Research, 2005
Microsporogenesis and pollen development were analyzed in a tetraploid (2n = 4x = 36) accession of the forage grass Brachiaria jubata (BRA 007820) from the Embrapa Beef Cattle Brachiaria collection that showed partial male sterility.
C. Risso-Pascotto, M.S. Pagliarini, C.B. Valle, L. Jank   +3 more
doaj   +1 more source

Identification of microspore-active promoters that allow targeted manipulation of gene expression at early stages of microgametogenesis in Arabidopsis

BMC Plant Biology, 2006
Background The effective functional analysis of male gametophyte development requires new tools enabling the spatially and temporally controlled expression of both marker genes and modified genes of interest.
Donders Maarten, Reňák David, Oh Sung-Aeong, Honys David, Šolcová Blanka, Johnson James, Boudová Rita, Twell David   +7 more
doaj   +1 more source

Anatomía y desarrollo de la flor estaminada, microsporogénesis y microgametogénesis en especies deLophophytum (Balanophoraceae) en la Argentina

Boletín de la Sociedad Argentina de Botánica
Se estudió la anatomía y desarrollo de la flor estaminada, microsporogénesis y microgametogénesis de Lophophytum leandrii y Lophophytum mirabile subsp. bolivianum, a fin de aportar datos para el conocimiento y taxonomía del género.
Héctor A.  Sato , Ana M. Gonzalez
doaj   +1 more source

FACS-based purification of Arabidopsis microspores, sperm cells and vegetative nuclei

Plant Methods, 2012
Background The male germline in flowering plants differentiates by asymmetric division of haploid uninucleated microspores, giving rise to a vegetative cell enclosing a smaller generative cell, which eventually undergoes a second mitosis to originate two
Borges Filipe, Gardner Rui, Lopes Telma, Calarco Joseph P, Boavida Leonor C, Slotkin R, Martienssen Robert A, Becker Jörg D   +7 more
doaj   +1 more source