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Complex sexual signals for the male gametophyte
Current Opinion in Plant Biology, 1999The pollen grain and the pollen tube that grows from it are complex entities which must respond to a diverse array of signals to carry out their roles in sexual reproduction. Research is beginning to reveal the nature both of the signals and of the signal transduction machinery that converts these signals into directional, polarized growth.
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Botanical Gazette, 1914
In a study of Abies balsamea as a type of the Coniferae, a number of irregularities in the contents of the pollen grain have been observed. Since the material used was collected from different trees and in different years, these irregularities cannot be regarded as abnormalities; and since further examination showed that similar conditions prevail in ...
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In a study of Abies balsamea as a type of the Coniferae, a number of irregularities in the contents of the pollen grain have been observed. Since the material used was collected from different trees and in different years, these irregularities cannot be regarded as abnormalities; and since further examination showed that similar conditions prevail in ...
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The male gametophyte of angiosperms
The Botanical Review, 1949This article deals almost entirely with the morphological and cytological features associated with the development and organization of the male gametophyte. The physiological and genetical aspects of pollen germination and pollen tube growth are discussed only incidentally.
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Male Gametophyte of Atriplex hymenelytra
Botanical Gazette, 19341. The development of the pollen mother cells from the archesporium follows the usual course found in angiosperms. 2. The tapetum is composed of binucleate, richly protoplasmic cells. 3. Meiosis appears to be normal. 4. Eight autosome bivalents and a tripartite X-Y group appear on the metaphase plate in I.
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Male Gametophyte Response to High Temperature in Maize
1986Gametophytic selection for important sporophytic traits such as resistence to environmental stresses and to pathogenic toxins has been proposed as a very efficient tool for the improvement of plant breeding methods1,2,3, on the grounds of the existence of an extensive genetic overlap between the gametophytic and sporophytic phases4,5,6.
FROVA C +2 more
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Stress Effects on the Male Gametophyte
1992During the last stages of maturation and after release from the anthers, particularly, pollen dehydrates to varying extents prior to its rehydration on the stigma. Desiccation is certainly not the only one stress exerted during the life of the male gametophyte.
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Male Gametophytic Selection in Higher Plants
1988Gametophytic selection refers to the differential gene transmission during the haploid phase in higher plants, which begins with the meiosis product and ends with fertilization. The special features of the male gametophyte (large population size, independence of the maternal plant, direct exposure to environmental stresses, competition within the same ...
E. Ottaviano +3 more
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Development of the Male Gametophyte in Tradescantia
Botanical Gazette, 19331. Development of the male gametophyte in Tradescantia seems to be correlated with a polarity established during the meiotic divisions. The spindle of the first microspore division is almost invariably oriented across the short axis of the cell, and the dividing nucleus is nearer the cell wall formed during meiosis.
Karl Sax, H. W. Edmonds
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Genetic Manipulation of Male Gametophytic Generation in Higher Plants
1991The success of a plant breeding program largely depends on the genetic composition of the base population used to select improved varieties and on the use of efficient selection procedures. The conventional approach offers a large spectrum of methods allowing increase of genetic variability and efficiency of selection.
OTTAVIANO E +2 more
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The membrane proteome of male gametophyte in Solanum lycopersicum
Journal of Proteomics, 2016Pollen cells possess specialized cellular compartments separated by membranes. Consequently, mature pollen contains proteinaceous factors for inter- and intracellular transport of metabolites or ions to facilitate the upcoming energy exhausting processes - germination and fertilization.
Paul, Puneet +8 more
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