Results 81 to 90 of about 2,555 (213)

Aperture Pattern and Microsporogenesis in Asparagales

Aliso, 2006
The aperture pattern of pollen grains is a character defined as the number, shape, and position of apertures. Although this character is highly variable in angiosperms, two states are particularly widespread. Pollen grains with one polar aperture occur frequently in basal angiosperms and monocots while tricolpate pollen is a synapomorphy of the ...
Nadot, Sophie, Penet, Laurent, Dreyer, Leanne, Forchioni, Arlette, Ressayre, Adrienne   +4 more
openaire   +3 more sources

Microsporogenesis in three tetraploid somatic hybrids of potato and their di(ha)ploid fusion partners

, 1992
The microsporogenesis of three somatic hybrids of potato, i.e. one tetraploid Solanum tuberosum (+) S. phureja, one tetraploid and one hypertetraploid S. tuberosum (+) desynaptic mutant, has been examined and compared with the microsporogenesis of the di(
Ferwerda, M.A., Pijnacker, L.P., Mattheij, W.M.   +2 more
core   +1 more source

Reproductive studies in ipecac (Psychotria ipecacuanha (Brot.) stockes; Rubiaceae): pollen development and morphology

Brazilian Archives of Biology and Technology, 2008
The aim of this work was to carry out the reproductive studies on Brazilian accessions of ipecac, Psychotria ipecacuanha. It presented heterostyly, with brevistylous and longistylous flowers.
Margarete Magalhães Souza, Ernane Ronie Martins, Telma Nair Santana Pereira, Luiz Orlando de Oliveira   +3 more
doaj   +1 more source

Preliminary study on the inducement effect of colchicine during microsporogenesis of Ginkgo biloba L.

, 2013
This is the first report of colchicine treatment effect on microsporogenesis of Ginkgo biloba L, By high performance liquid chromatography (HPLC) analysis, colchicine was detected in microsporocyte inclusion from colchicine-treated microsporangium and ...
Sun, P, Li, Y, Yang, N, Sun, Y, Yuan, C
core   +1 more source

Relação entre os estádios de desenvolvimento dos micrósporos e as características morfológicas do botão floral em pimentão (Capsicum annuum L.) Relationship among the development stages of microspores and the morphological characteristics of the floral bud in sweet pepper (Capsicum annuum L.)

Ciência Rural, 1995
Vários fatores influenciam a cultura de anteras, entre eles, o estádio de desenvolvimento dos micros poros. O presente estudo teve por objetivo verificar a relação entre o estádio de desenvolvimento dos micrósporos com algumas características ...
José Magno Queiroz Luz, Renata Silva, Lisete Chamma Davide, José Eduardo Brasil Pereira Pinto   +3 more
doaj   +1 more source

Microsporogenesis in male-sterile and hermaphroditic plants of nine gynodioecious taxa of Hawaiian bidens (Asteraceae)

, 1987
Microsporogenesis was investigated in hermaphroditic and male-sterile plants in nine gynodioecious taxa of Hawaiian Bidens. Normal microsporogenesis in hermaphrodites and the onset of abortion in male steriles were similar in all taxa and in a hybrid ...
Ganders, FR, Sun, M
core   +1 more source

A phenotypic marker for quantifying heat stress impact during microsporogenesis in rice (Oryza sativa L.) [PDF]

, 2014
Gametogenesis in rice (Oryza sativa L.), and particularly male gametogenesis, is a critical developmental stage affected by different abiotic stresses.
Shi, W, Craufurd, P Q, Oane, R, Jagadish, K S V   +3 more
core   +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

Meiotic index in Myrtaceae native fruits trees from southern Brazil

Crop Breeding and Applied Biotechnology, 2004
This work aimed to evaluate meiotic index in Myrtaceae species, native of southern Brazil. Flower buds were collected and stored in ethylic alcohol:propionic acid (2:1) until evaluation by the smear and squash technique with propionic carmin as a dye.
Rodrigo Cezar Franzon, Maria do Carmo Bassols Raseira   +1 more
doaj  

Histone modifications during tobacco male meiosis

Biologia Plantarum, 2019
The special and temporal distribution of several posttranslational histone modifications (H3K4me2, H3K4me3, H3K9me2, H3K27me2, H3K9ac, H3K14ac, H3K18ac, H3K27ac, H3S10ph, H3S28ph, H3T3ph, H3K4me1-H3T3ph, H3K4me3/H3T3ph H3T11ph, H2AT121ph, and H2A.XS139ph)
S. MURSALIMOV, E. DEINEKO, A. HOUBEN, D. DEMIDOV   +3 more
doaj   +1 more source