Exemplos de uso de Pollen viability em Inglês e suas traduções para o Português
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Thus, the purpose of this study was to estimate the pollen viability of p.
High pollen viability and stigmatic receptivity occurred at 8 am anthesis.
Thecastor bean cultivars present high percentage of pollen viability at anthesis.
The pollen viability was performed with the dye alexander, using buds collected in anthesis and fixed in ethanol.
These species presented stable meiotic behaviour and high pollen viability over 87.
Additionally, meiotic behavior and pollen viability of hybrids of these three accessions in the f1 generation were investigated.
In group 2, it was selected 70 cultivars launched before the year 2000,which were evaluated for pollen viability.
The results indicate that the average percentage ofthe pollen viability was not influenced by the storage period.
For pollen viability, 1500 pollen grains were analyzed and characterized as viable or unviable by using alexander 's triple staining.
The volume of the anthers, the number of pollen grains per anther, pollen diameter,the thickness of the exine and pollen viability were evaluated.
High rates of germination and pollen viability were observed for the different species, and stigma receptivity showed the highest at anthesis.
In group 1, it was selected 17 cultivars launched after the year 2000,which were evaluated for the presence of micronuclei in tetrads, and the pollen viability.
Diploids have stable meiosis and high pollen viability, while polyploids have variable pollen viability, which is directly related to the meiotic index.
Cytological analyses included chromosome number determination, karyotype study,meiotic behaviour, pollen viability and morphology, and dna content.
Besides, the germplasm characterization of a species, as the pollen viability determination for instance, is important in maintaining a database that may be useful for future research.
Tests were made to aspects of floral biology time of anthesis; stigmatic receptivity;availability of pollen, pollen viability; osmophores; pigments that reflect uv light.
These studies have also aimed to analyze pollen viability and determination of genetic distance between cultivars, allowing the confirmation of stability, uniformity and intrinsic genetic differences of the materials.
This pairing reflected tetrad formation that ranged from 94.2-96.1% of regularity, and consequently pollen viability achieving 79-94.5%, due the variety and time that sample was synthesized.
Informations about pollen viability of genotypes of sugarcane during the storage time, allow us to estimate the moment when pollen retains its germination power, vigor and genetic integrity to promote hybridizations between parents that have asynchronous flowering.
Between these studies,highlights the characterization meiotic and pollen viability, genotoxic and antiproliferative activitie, beyond determination of phenolic compounds.
After selection, cytogenetic evaluations were performed in hybrids to identify meiotic abnormalities which could be detrimental to pollen viability and consequently to seed production.
This work aimed to study the pollen viability, as well as morphoanatomy with regard to stigma receptivity and the dynamics of pollen tube growth of stigma to the egg in diploid and triploid bananas in order to verify the existence of physical barriers that can cause the sterility in banana.
Floral traits been described, time and duration of anthesis, the stigma receptivity,availability and pollen viability, the presence of pigments ultra violet(uv) and detection osmophores.
The flowering of passiflora setacea was accompanied from november 2012 to november 2013. the evaluated characteristics in flowers were: antesis period and senescence, floral morphology,ecology of nectar, the pollen viability, stigma receptivity and different pollination methods.
This work aimed to study general aspects from hybridization in sugarcane,verify the existence of correlation between the pollen viability and the fertility of caryopsis, evaluate the viability of the pollen obtained from the upper and lower third of the panicles of tem genotypes, as well as pollen viability during the storage time of four varieties.
However, parental recommendation has as a limiting factor the lack of floral synchronismbetween the genotypes and the lack of characterization of the accessions by the pollen viability, which may reflect on infertility or low fertility of caryopses.
Thus, different experiments were performed:characterization of flowers through light and electron microscopy; pollen viability by in vitro germination and histochemical analysis; stigma receptivity; observation on the reproductive mechanisms; nectar concentration and composition, among other variables. seed germination was evaluated in different conditions and temperatures and post-seminal development was characterized.
The objective of the present study was to investigate the antiproliferative, genotoxic and antigenotoxic activity of aqueous extracts of two accesses of s. australis, using the allium cepa test, and to determine the phenolic compounds present in these extracts,as well as to analyze the meiotic behavior and estimate the pollen viability of different accesses of s. australis collected in rio grande.
Were evaluated: flowering anthesis, the stigma receptivity, the duration of anthesis,the pollen/ ovule ratio, pollen viability and germination; secretion of nectar and floral visitors. to assess the effect of insect m. scutellaris and a.
This study aimed to: a verify the occurrence of cross-resistance to the five chemical groups of als inhibitors, b determine the type of inheritance, the number of genes and resistance level in parental and f1 offspring, c determine the ploidy level, describe the karyotype,analyze the meiotic behavior and quantify the pollen viability, d determine the molecular basis of resistance, e determine the pattern of germination, and f investigate the occurrence of triple resistance.