Results 31 to 40 of about 572 (156)

ELECTRON MICROSCOPIC STUDY OF THE DEVELOPMENTAL STAGES OF EIMERIA INTESTINALIS CHEISSIN, 1948 IN DOMESTIC RABBIT (ORYCTOLAGUS CUNICULUS) WITH REFERENCE TO ENDODYOGENY [PDF]

Journal of the Egyptian Society of Parasitology, 2014
The endogenous stages in Eimeria intestinalis were studied in experimentally infected coccidia- free rabbits by transmission electron microscopy. Four asexual generations were observed. Two types of merozoites were reported.
HEBA ABDEL-HALEEM, HODA ELFAYOUMI
doaj   +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

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

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

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

Phenological phases of flowering in hop (Humulus lupulus L.) and their correspondence with microsporogenesis and microgametogenesis [PDF]

Scientia Horticulturae, 2019
[EN] Hop (Humulus Lupulus L.) suffered, as many other crops, a shrinkage of its intraspecific agrobiodiversity. Biotechnological methods of breeding would offer new opportunities to produce improved varieties with interesting phytochemical profiles and adaptable to the challenging conditions of climate change. Doubled haploid (DH) technology could be a
Liberatore, Antonio Calabuig-Serna, Margherita Rodolfi, Benedetta Chiancone, Jose M. Seguí-Simarro   +4 more
openaire   +3 more sources

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

Cytology and Kinetics of microgametogenesis and fertilization in Plasmodium yoelii nigeriensis

Parasitology, 1975
The sexual development of the microgametocyte of Plasmodium yoelii nigeriensis may be subdivided into microgametogenesis which includes exflagellation, dispersal of the gametes and fertilization. Under our experimental conditions microgametogenesis takes about 8–15 min at 20 °C, the duration of this period being inversely related to temperature ...
R E, Sinden, N A, Croll
openaire   +2 more sources

Systematic analysis of Plasmodium myosins reveals differential expression, localisation, and function in invasive and proliferative parasite stages

Cellular Microbiology, Volume 21, Issue 10, October 2019., 2019
Very little was known about the family of six myosins in malaria‐causing parasites, except for a role of one in motility. We show here that myosins have a diverse pattern of expression and subcellular location through the parasite life cycle in both the mammalian host and mosquito vector.
Richard J. Wall, Mohammad Zeeshan, Nicholas J. Katris, Rebecca Limenitakis, Edward Rea, Jessica Stock, Declan Brady, Ross F. Waller, Anthony A. Holder, Rita Tewari   +9 more
wiley   +1 more source

The androecium of Adenium obesum (Apocynaceae): anther and pollen grains development

Ornamental Horticulture
In this study, we describe anther development in Adenium obesum, providing information on microsporogenesis, microgametogenesis, and the structure of mature pollen grains.
Deborah Cristina Dias Campos, Clivia Carolina Fiorilo Possobom, Elka Fabiana Aparecida Almeida, Sabrina Maihave Barbosa Ramos, Silvia Nietsche   +4 more
doaj   +1 more source