Results 251 to 260 of about 1,606,059 (290)
Some of the next articles are maybe not open access.
The evolution of double fertilization and endosperm: an ”historical” perspective
Sexual Plant Reproduction, 1998One hundred years ago, the developmental origin of endosperm from double fertilization was discovered independently by Navashin and Guignard. For much of the twentieth century, specific events related to the evolutionary origin of the endosperm of flowering plants remained a mystery.
William E. Friedman
exaly +2 more sources
Fertility of doubled monoploids ofSolanum phureja
American Potato Journal, 1992Thirteen anther-derived doubled monoploids and their heterozygous diploid anther donor were evaluated in the greenhouse for flowering, fruit set, seed set and pollen fertility. Doubled monoploids varied for number of days to flower, duration of flowering, abundance of flowers and general flower quality. Fruit set on the doubled monoploids in controlled
H. Kaburu M’Ribu, Richard E. Veilleux
openaire +1 more source
Developmental and evolutionary hypotheses for the origin of double fertilization and endosperm
Comptes Rendus De L'Académie Des Sciences Série 3, Sciences De La Vie, 2001The discovery of a second fertilization event that initiates endosperm in flowering plants, just over a century ago, stimulated intense interest in the evolutionary history and homology of endosperm, the genetically biparental embryo-nourishing tissue that is found only in angiosperms.
William E. Friedman
exaly +3 more sources
Flowering and Double Fertilization
This chapter assesses flowering and double fertilization. Flowering at the correct time of the year is crucial for the reproductive fitness of the plant. The transition to flowering involves major changes in the pattern of morphogenesis and cell differentiation at the shoot apical meristem (SAM).Lincoln Taiz +3 more
openaire +1 more source
Double Fertilization and Development of the Seed in Angiosperms
Botanical Gazette, 19401. Following self-pollination in alfalfa, 34.4 per cent of the fertile ovules collapsed during the first 144 hours as compared with only 7.1 per cent after cross-pollination. 2. Fertile ovule collapse is associated with excessive growth of the inner integument.
R. A. Brink, D. C. Cooper
openaire +1 more source
Cell–cell communication during double fertilization
Current Opinion in Plant Biology, 2006Double fertilization in flowering seed plants requires intercellular signaling events between many interacting partners. The four cell types of the seven-celled female gametophyte communicate with each other to establish and maintain their identity. They secrete signaling molecules to guide the male gametophyte and to mediate sperm cell discharge and ...
openaire +2 more sources
Double translocation heterozygosity and normal fertility in domestic sheep
Cytogenetics and Cell Genetics, 2008Intermating of sheep heterozygous for what was believed previously to be two different submetacentric translocations (Massey I and Massey III) and subsequent meiotic studies on one of the ram progeny have confirmed that these translocations are completely nonhomologous.
A N, Bruère, H M, Chapman
openaire +2 more sources
A gynandromorphic grasshopper produced by double fertilization
Australian Journal of Zoology, 1968An individual of the large grasshopper Valanga irregularis (Walker) which exhibited bilateral gynandromorphism, is described. The entire right side was female, the left side being male. The colour pattern on the two sides was completely different, the male side corresponding to the concolorous phenotype, the female side to the contrasty one.
openaire +1 more source
Double Delivery During Plant Fertilization
Science, 2012The cysteine-rich proteins of Arabidopsis egg and central cells enable fusion with just one sperm each.
openaire +2 more sources
[True hermaphroditism and double fertilization].
Journal de genetique humaine, 1987Two cases of true hermaphroditism are presented. Sex differentiation mechanism, X functions in skin development and pigmentation are studied. Lateral gender assignment in hermaphroditism and mythologic concept right side = maleness and left side = femininity are compared.
openaire +1 more source