Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Melissa, Spielman"'
Autor:
Brian P Dilkes, Melissa Spielman, Renate Weizbauer, Brian Watson, Diana Burkart-Waco, Rod J Scott, Luca Comai
Publikováno v:
PLoS Biology, Vol 6, Iss 12, Pp 2707-2720 (2008)
The molecular mechanisms underlying lethality of F1 hybrids between diverged parents are one target of speciation research. Crosses between diploid and tetraploid individuals of the same genotype can result in F1 lethality, and this dosage-sensitive
Externí odkaz:
https://doaj.org/article/fc37026dc50d402aafe52f524216640a
Autor:
Rod J. Scott, Melissa Spielman
Publikováno v:
Sexual Plant Reproduction. 21:53-65
Barriers to polyspermy (fertilization of a female gamete by more than one sperm) are essential to successful reproduction in a wide range of organisms including mammals, echinoderms, fish, molluscs, and algae. In animals and fucoid algae, polyspermy
Publikováno v:
Plant Biotechnology Journal. 4:393-407
Endosperm accounts for a large proportion of human nutrition and is also a major determinant of seed viability and size, not only in cereals, but also in species with ephemeral endosperms, such as soybean and oilseed rape. The extent of endosperm pro
Publikováno v:
Development. 133:251-261
Control of seed size involves complex interactions among the zygotic embryo and endosperm, the maternally derived seed coat, and the parent plant. Here we describe a mutant in Arabidopsis, megaintegumenta (mnt), in which seed size and weight are dram
Autor:
Melissa Spielman, Rod J. Scott
Publikováno v:
BioEssays. 28:1167-1171
Current models for regulation of parent-specific gene expression in plants have been based on a small number of imprinted genes in Arabidopsis. These present repression as the default state, with expression requiring targeted activation. In general,
Autor:
Rod J. Scott, Melissa Spielman
Publikováno v:
Cytogenetic and Genome Research. 113:53-67
In both flowering plants and mammals, DNA methylation is involved in silencing alleles of imprinted genes, but surprising differences in imprinting control are emerging between the two taxa which may be traced to differences in their life cycles. Imp
Publikováno v:
The Plant Cell. 15:1430-1442
The success or failure of interspecific crosses is vital to evolution and to agriculture, but much remains to be learned about the nature of hybridization barriers. Several mechanisms have been proposed to explain postzygotic barriers, including nega
Autor:
Y Li, S Ghelani, Roy C. Brown, Hugh G. Dickinson, Rod J. Scott, Melissa Spielman, B. E. Lemmon, Caiyun Yang, Valérie Bourdon, J P Coles
Publikováno v:
The Plant Journal. 34:229-240
A key step in pollen formation is the segregation of the products of male meiosis into a tetrad of microspores, each of which develops into a pollen grain. Separation of microspores does not occur in tetraspore (tes) mutants of Arabidopsis thaliana,
Autor:
Sjef Smeekens, Melissa Spielman, Alain Tissier, Ian A. Graham, Anja J.H. Van Dijken, Jonathan D. G. Jones, Aimie Kerr, Hugh G. Dickinson, Peter J. Eastmond
Publikováno v:
The Plant Journal. 29:225-235
Despite the recent discovery that trehalose synthesis is widespread in higher plants very little is known about its physiological significance. Here we report on an Arabidopsis mutant (tps1), disrupted in a gene encoding the first enzyme of trehalose
Publikováno v:
Trends in Genetics. 17:705-711
What makes a sperm male or an egg female, and how can we tell? A gamete's gender could be defined in many ways, such as the sex of the individual or organ that produced it, its cellular morphology, or its behaviour at fertilization. In flowering plan