Journal ArticleDOI
Identification of diploid endosperm in an early angiosperm lineage
TLDR
It is shown that diploid endosperms are common among early angiosperm lineages and may represent the ancestral condition among flowering plants.Abstract:
In flowering plants, the developmental and genetic basis for the establishment of an embryo-nourishing tissue differs from all other lineages of seed plants. Among extant nonflowering seed plants (conifers, cycads, Ginkgo, Gnetales), a maternally derived haploid tissue (female gametophyte) is responsible for the acquisition of nutrients from the maternal diploid plant, and the ultimate provisioning of the embryo. In flowering plants, a second fertilization event, contemporaneous with the fusion of sperm and egg to yield a zygote, initiates a genetically biparental and typically triploid embryo-nourishing tissue called endosperm. For over a century, triploid biparental endosperm has been viewed as the ancestral condition in extant flowering plants. Here we report diploid biparental endosperm in Nuphar polysepalum, a basal angiosperm. We show that diploid endosperms are common among early angiosperm lineages and may represent the ancestral condition among flowering plants. If diploid endosperm is plesiomorphic, the triploid endosperms of the vast majority of flowering plants must have evolved from a diploid condition through the developmental modification of the unique fertilization process that initiates endosperm.read more
Citations
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Journal ArticleDOI
Nuclear Endosperm Development in Cereals and Arabidopsis thaliana
TL;DR: The nuclear endosperm of monocots, including the cereal species maize, rice, barley, and wheat, represents humankind's most important renewable source of food, feed, and industrial raw materials.
Journal ArticleDOI
Endosperm: the crossroad of seed development.
TL;DR: Endosperm development appears to be predominantly under epigenetic controls that might be linked with its evolutionary origin, and is controlled maternally by chromatin-remodeling complexes.
Journal ArticleDOI
Identifying the Basal Angiosperm Node in Chloroplast Genome Phylogenies: Sampling One's Way Out of the Felsenstein Zone
Jim Leebens-Mack,Linda A. Raubeson,Liying Cui,Jennifer V. Kuehl,Matthew H. Fourcade,Timothy W. Chumley,Jeffrey L. Boore,Jeffrey L. Boore,Robert K. Jansen,Claude W. dePamphilis +9 more
TL;DR: In this paper, the authors extracted protein-coding regions from draft sequences for six additional chloroplast genomes to test whether this surprising result could be an artifact of long-branch attraction due to limited taxon sampling.
Journal ArticleDOI
Towards a phylogenetic nomenclature of Tracheophyta
Philip D. Cantino,James A. Doyle,Sean W. Graham,Walter S. Judd,Richard G. Olmstead,Douglas E. Soltis,Pamela S. Soltis,Michael J. Donoghue +7 more
TL;DR: Criteria and approaches used here to choose among competing preexisting names for a clade, to select a definition type, to choose appropriate specifiers, and to restrict the use of a name to certain phylogenetic contexts may be widely applicable when naming other clades.
Journal ArticleDOI
Analysis of the Amborella trichopoda Chloroplast Genome Sequence Suggests That Amborella Is Not a Basal Angiosperm
TL;DR: The majority of phylogenetic analyses of protein-coding genes of this chloroplast DNA suggests that Amborella is not the basal angiosperm and not even the most basal among dicots.
References
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Book
Flowering Plants: Evolution Above the Species Level
TL;DR: One of the most popular books now is the flowering plants evolution above the species level as discussed by the authors, but it is difficult to find the book in the book store around the city. And when you have found the store to buy the book, it will be so hurt when you run out of it.
Journal ArticleDOI
Ecological intensification of cereal production systems: Yield potential, soil quality, and precision agriculture
TL;DR: It is concluded that major scientific breakthroughs must occur in basic plant physiology, ecophysiology, agroecology, and soil science to achieve the ecological intensification that is needed to meet the expected increase in food demand.
Book
An introduction to the embryology of angiosperms
TL;DR: An introduction to the embryology of angiosperms and its applications in medicine and science.
Journal ArticleDOI
Angiosperm phylogeny inferred from multiple genes as a tool for comparative biology
TL;DR: The results of parsimony analyses of DNA sequences of the plastid genes rbcL and atpB and the nuclear 18S rDNA for 560 species of angiosperms and seven non-flowering seed plants are reported and show a well-resolved and well-supported phylogenetic tree for the angios perms for use in comparative biology.
Journal ArticleDOI
The earliest angiosperms: evidence from mitochondrial, plastid and nuclear genomes
Yin Long Qiu,Jungho Lee,Fabiana Bernasconi-Quadroni,Douglas E. Soltis,Pamela S. Soltis,Michael J. Zanis,Elizabeth A. Zimmer,Zhi-Duan Chen,Zhi-Duan Chen,Vincent Savolainen,Mark W. Chase +10 more
TL;DR: This study demonstrates that Amboreella, Nymphaeales and Illiciales-Trimeniaceae-Austrobaileya represent the first stage of angiosperm evolution, with Amborella being sister to all other angiosperms, and shows that Gnetales are related to the conifers and are not sister to the angios perms, thus refuting the Anthophyte Hypothesis.