Results 31 to 40 of about 820 (154)

The male germ unit association is independently regulated of GUM in Arabidopsis thaliana. [PDF]

Plant Direct
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
Rauf A, Wang A, Li Y, Lian Z, Wei S, Jabbar K, Wisal M, Khan I, Khalid M, Li J.   +9 more
europepmc   +2 more sources

Dynamics of Calcium during In vitro Microspore Embryogenesis and In vivo Microspore Development in Brassica napus and Solanum melongena

Frontiers in Plant Science, 2017
Calcium is widely known to have a role as a signaling molecule in many different processes, including stress response and activation of the embryogenic program.
Alba Rivas-Sendra, Antonio Calabuig-Serna, Jose M. Seguí-Simarro   +2 more
doaj   +1 more source

Differential Expression Profiling Reveals Stress-Induced Cell Fate Divergence in Soybean Microspores

Plants, 2020
Stress-induced microspore embryogenesis is a widely employed method to achieve homozygosity in plant breeding programs. However, the molecular mechanisms that govern gametophyte de- and redifferentiation are understood poorly.
Brett Hale, Callie Phipps, Naina Rao, Asela Wijeratne, Gregory C. Phillips   +4 more
doaj   +1 more source

Embriología de las estructuras reproductoras masculinas del género Pinguicula L. (Lentibulariaceae)

Botan‪ical Sciences, 2005
Con el propósito de contribuir al conocimiento embriológico del género Pinguicula (Lentibulariaceae) se estudiaron los procesos ontogenéticos de las estructuras reproductoras masculinas de una especie representativa de cada uno de los tres subgéneros ...
Silvia Espinosa-Matías, Sergio Zamudio, Judith Márquez-Guzmán   +2 more
doaj   +1 more source

Scanning and transmission electron microscopy ofEimeria maximamicrogametogenesis

Parasitology, 1981
SUMMARYThe structure and development of microgametocytes ofEimeria maximafrom chicks killed during the 6th day of infection were examined using transmission and scanning electron microscopy. Initially, nucleoli disappear and the surface of the microgametocyte invaginates.
S J, Ball, R M, Pittilo, L P, Joyner, C C, Norton   +3 more
openaire   +2 more sources

Cyto-Embryological Analysis of Wild Kentucky Bluegrass Germplasm in Gansu Province, China

Agronomy, 2023
Reproduction studies, particularly embryology, represent basic information of any plant. However, the current embryological information is fragmentary for Kentucky bluegrass (Poa pratensis L.).
Jinqing Zhang, Huiling Ma
doaj   +1 more source

Microsporogenesis and microgametogenesis of the Argentinian species ofPodocarpus(Podocarpaceae) [PDF]

Botanical Journal of the Linnean Society, 1996
Abstract The development of the microsporangium and male gametophyte of three species of Podocarpus was studied with light microscopy (LM) and the morphology of pollen with scanning and transmission electron microscopy (SEM and TEM). During early stages, the male cone is covered with coriaceous scales.
openaire   +1 more source

Optical and ultrastructural study of the pollen grain development in hermaphrodite papaya tree (Carica papaya L.)

Brazilian Archives of Biology and Technology, 2008
The objective of this study was to describe the pollen grain development in hermaphrodite papaya tree. The flower buds were collected at different stages of the development and the anthers were treated chemically for observation under optical and ...
Lídia Márcia Silva Santos, Telma Nair Santana Pereira, Margarete Magalhães de Souza, Pedro Correa Damasceno Junior, Fabiane Rabelo da Costa, Beatriz Ferreira Ribeiro, Noil Gomes de Freitas, Messias Gonzaga Pereira   +7 more
doaj   +1 more source

Arabidopsis COG Complex Subunits COG3 and COG8 Modulate Golgi Morphology, Vesicle Trafficking Homeostasis and Are Essential for Pollen Tube Growth. [PDF]

PLoS Genetics, 2016
Spatially and temporally regulated membrane trafficking events incorporate membrane and cell wall materials into the pollen tube apex and are believed to underlie the rapid pollen tube growth.
Xiaoyun Tan, Kun Cao, Feng Liu, Yingxin Li, Pengxiang Li, Caiji Gao, Yu Ding, Zhiyi Lan, Zhixuan Shi, Qingchen Rui, Yihong Feng, Yulong Liu, Yanxue Zhao, Chengyun Wu, Qian Zhang, Yan Li, Liwen Jiang, Yiqun Bao   +17 more
doaj   +1 more source

Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae)

Acta Botânica Brasílica, 2015
This paper presents a comparative description of the starch distribution in the anthers, microspores and pollen grains of Aechmea recurvata, Dyckia racinae and Tillandsia aeranthos.
João Marcelo Santos de Oliveira, Merielem Saldanha Martins, Mariane Paludette Dorneles, Cesar Carvalho de Freitas   +3 more
doaj   +1 more source