(1) In agamous-1, stamens to petals; in apetala2-1, sepals to leaves and petals to staminoid petals; in apetala3-1, petals to sepals and stamens to carpels; in pistillata-1, petals to sepals.
(2) All of the bolls inoculated through the carpel wall had A. flavus in the seed, but only 11% of the stem and peduncle sections were infected, indicating that the fungus does not readily grow downward from the boll into the supporting stem or peduncle.
(3) In the families of flowering plants in which these organs occur, they are patterned with the sepals in the outermost whorl or whorls of the flower, with the petals next closest to the center, the stamens even closer to the center, and the carpels central.
(4) In flowers, expression was observed in sepals, anthers, and carpels, but not in petals.
(5) Mutation of this gene (defA-1) causes homeotic transformation of petals into sepals and of stamina into carpels in flowers displaying the 'globifera' phenotype, as shown by cross sections and scanning electronmicroscopy of developing flowers.
(6) In situ hybridization revealed that FST mRNA is most abundant in the epidermal cells along the adaxial surface of petals, and in the surface cell layers of the carpel and anther walls.
(7) During development sp41 transcript accumulation starts well after carpel differentiation.
(8) We describe a locus, SUPERMAN, mutations in which result in extra stamens developing at the expense of the central carpels in the Arabidopsis thaliana flower.
(9) Mutations in this homeotic gene cause the transformation of stamens to petals in floral whorl 3 and of carpels to another ag flower in floral whorl 4.
(10) We found that AG RNA is present in the stamen and carpel primordia but is undetectable in sepal and petal primordia throughout early wild-type flower development, consistent with the mutant phenotype.
(11) New mutations at the APETALA2 locus, ap2-2, ap2-8 and ap2-9, cause homeotic conversions in the outer two whorls: sepals to carpels (or leaves) and petals to stamens.
(12) Wild-type in vitro placental cultures also produce outgrowths identified as homologs of whole carpels.
(13) Comparative studies between two pea cultivars, one with a high incidence of seed transmission and one with none, showed that PSbMV infected the floral tissues (sepals, petals, anther and carpel) of both cultivars, but was not detected in ovules prior to fertilization.
(14) In both sets of chimeras, carpel number as well as the size of the floral meristem during carpel initiation were not determined by the genotype of cells in the outer two layers of the meristem (L1 and L2) but were determined by the genotype of cells occupying the inner layer (L3) of the meristem.
(15) In contrast to the early expression pattern, later in flower development, AG RNA is restricted to specific cell types within the stamens and carpels as cellular differentiation occurs in those organs.
(16) Mutations in the APETALA3 (AP3) gene of A. thaliana result in homeotic transformations of petals to sepals and stamens to carpels.
(17) Thickening of the transverse carpal ligaments is unusual in patients with the carpal tunnel syndrome but is a common finding in the relatively few patients with familial carpel tunnel syndrome so far described in the literature.
(18) The agamous gene therefore probably encodes a transcription factor that regulates genes determining stamen and carpel development in wild-type flowers.
(19) Interspecific chimeras were generated between tomato and L. peruvianum, which differ in number of carpels per flower.
(20) We have generated periclinal chimeras between plants that differ in the number of carpels per flower to determine the roles of cells occupying specific positions in the floral meristem in determining the number of carpels initiated.
Stamen
Definition:
(n.) A thread; especially, a warp thread.
(n.) The male organ of flowers for secreting and furnishing the pollen or fecundating dust. It consists of the anther and filament.
Example Sentences:
(1) Differential screening of a tomato cDNA library produced from pre-anthesis stamens resulted in the isolation of 25 cDNA clones that hybridized to probes made from stamen RNA and showed no hybridization to probes made from RNA of vegetative organs.
(2) In agamous-1, stamens to petals; in apetala2-1, sepals to leaves and petals to staminoid petals; in apetala3-1, petals to sepals and stamens to carpels; in pistillata-1, petals to sepals.
(3) Cells from immature stamen hairs of the spiderwort plant Tradescantia virginiana cv.
(4) Normal stamens exhibited the synthesis of many polypeptides not found in the mutant, from microspore mother cell to the preanthesis stages.
(5) In the families of flowering plants in which these organs occur, they are patterned with the sepals in the outermost whorl or whorls of the flower, with the petals next closest to the center, the stamens even closer to the center, and the carpels central.
(6) The normally predictable duration of metaphase in stamen hair cells from the spiderwort, Tradescantia virginiana, is shortened significantly by treatment during prometaphase with either ruthenium red or Bay K-8644.
(7) Anaphase in dividing guard mother cells of Allium cepa and stamen hair cells of Tradescantia virginiana consists almost entirely of chromosome-to-pole motion, or anaphase A.
(8) A model is presented which proposes both combinatorial and cross-regulatory interactions between the DEFA and GLO genes during petal and stamen organogenesis in the second and third whorls of the flower.
(9) In a search for putative target genes of deficiens, several stamen- and petal-specific genes were cloned that are expressed in wild type but not in the deficiensglobifera mutant.
(10) Petals develop in the third floral whorl rather than the normal stamens, and the cells that would normally develop into the fourth whorl gynoecium behave as if they constituted an ag flower primordium.
(11) Another beta-tubulin isotype, beta 4, appears in marked abundance in immature and mature stamens.
(12) Squa transcriptional activity persists through later stages of floral morphogenesis, with the exception of stamen differentiation.
(13) In that section of the bay visibly contaminated by the creek effluent, increases in stamen hair mutants, micronuclei, and chromosome aberrations were measured.
(14) Stamen hair cells from the spiderwort plant, Tradescantia virginiana, exhibit remarkably predictable metaphase transit times, making them uniquely suitable for temporal studies on mitotic regulation.
(15) Another experimental disruption of the relationship, accomplished by making minute wounds in the PPB site of mitotic cells in Tradescantia stamen hairs, is described.
(16) Quite simply, the bee gets covered in pollen, from the male part of the flower (the stamen), and deposit the grains on the female part (the stigma) of the next flower that they visit.
(17) The normal and mutant stamens had some common proteins, but certain proteins were either present or more enriched in one genotype than in the other.
(18) We describe a locus, SUPERMAN, mutations in which result in extra stamens developing at the expense of the central carpels in the Arabidopsis thaliana flower.
(19) In order to test whether this influences the initial, linear component in the dose-effect relations, a comparison was made between dose-response curves for pink somatic mutations in Tradescantia clone 02 stamen hairs following X and gamma irradiations.
(20) During stage 6, petal primordia grow slowly, whereas stamen primordia enlarge more rapidly.