• seeds
  • To solve this problem using a biotechnological approach we aim at the destruction of ovules and/or seeds by directing the expression of a toxic gene using the promoter of an ovule and/or seed specific gene. (upv.es)
  • With the purpose of isolating this kind of genes we constructed two cDNA libraries from ovules and seeds at different developmental stages of the Clementine mandarin (Citrus clementina cv. (upv.es)
  • sperm
  • Published today in Nature Communications , a study by scientists at the Institute for Research in Biomedicine (IRB Barcelona) headed by ICREA researcher Angel R. Nebreda has reported that the protein RingoA is a key regulator of meiosis--the cell division process that gives rise to ovules and sperm for sexual reproduction in mammals. (eurekalert.org)
  • nucellus
  • When mature, the angiosperm ovule consists of a central mass of tissue, the nucellus , surrounded by 1 or 2 protective layers, the integuments , which eventually give rise to the seed coat. (encyclopedia.com)
  • patterns
  • Labeling of pectic arabinan with LM6 antibody and galactan with LM5 antibody revealed abundant amounts of both, with unique distribution patterns in the ovule and premature pericarp. (springer.com)
  • carpel
  • In gymnosperms the ovules are unprotected, whereas in angiosperms they are protected by the megasporophyll (which forms the carpel ). (encyclopedia.com)
  • structure
  • In seed plants, the ovule ("small egg") is the structure that gives rise to and contains the female reproductive cells. (wikipedia.org)
  • The first major evolutionary radiation of seed plants (spermatophytes) occurred in the Famennian of the Late Devonian, when ovules show great diversification in the morphology and structure of integuments and cupules [ 1 - 5 ]. (royalsocietypublishing.org)
  • plants
  • In flowering plants, the ovule is located inside the portion of the flower called the gynoecium. (wikipedia.org)
  • The capability of proembryos to differentiate and to form fully developed embryos and consequently plants started when the ovules were inoculated at the size of 2.5 - 3.0 mm. (springer.com)
  • formation
  • The evolutionary origin of the inner integument (which is integral to the formation of ovules from megasporangia) has been proposed to be by enclosure of a megasporangium by sterile branches (telomes). (wikipedia.org)
  • specific
  • Quantitative PCR analysis confirmed nearly specific expression in ovule and/or seed of two genes, TRANSPARENT TESTA16 (CcTT16) and TRANSPARENT TESTA7 (CcTT7). (upv.es)
  • below
  • Specifically, it is the part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals. (wikipedia.org)