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The Physcomitrella Genome Reveals Evolutionary Insights into the Conquest of Land by Plants
This comparison reveals genomic changes concomitant with the evolutionary movement to land, including a general increase in gene family complexity; loss of genes associated with aquatic environments; acquisition of genes for tolerating terrestrial stresses; and the development of the auxin and abscisic acid signaling pathways for coordinating multicellular growth and dehydration response.
The ASYMMETRIC LEAVES2 gene of Arabidopsis thaliana, required for formation of a symmetric flat leaf lamina, encodes a member of a novel family of proteins characterized by cysteine repeats and a…
The results suggest that AS2 functions in the transcription of a certain gene(s) in plant nuclei and thereby controls the formation of a symmetric flat leaf lamina and the establishment of a prominent midvein and other patterns of venation.
Tagged mutagenesis and gene-trap in the moss, Physcomitrella patens by shuttle mutagenesis.
- T. Nishiyama, Y. Hiwatashi, I. Sakakibara, M. Katô, M. Hasebe
- BiologyDNA research : an international journal for rapid…
A gene tagging and gene-trap system in P. patens is developed by using the shuttle mutagenesis technique, which has been used in the budding yeast, and 203 mutants with altered developmental or morphological phenotypes were obtained.
The Selaginella Genome Identifies Genetic Changes Associated with the Evolution of Vascular Plants
The genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported, is reported, finding that the transition from a gametophytes- to a sporophyte-dominated life cycle required far fewer new genes than the Transition from a non Seed vascular to a flowering plant.
Two ancient classes of MIKC-type MADS-box genes are present in the moss Physcomitrella patens.
- K. Henschel, R. Kofuji, M. Hasebe, H. Saedler, T. Münster, G. Theißen
- BiologyMolecular biology and evolution
- 1 June 2002
The studies reveal an ancient duplication of an MIKC-type gene that occurred before the separation of the lineages that led to extant mosses and vascular plants more than about 450 MYA, and strongly suggest that the most recent common ancestor of mossesand vascular plants contained at least one MI KC(c)-type and one MIKC(*)-type gene.
ANXUR1 and 2, Sister Genes to FERONIA/SIRENE, Are Male Factors for Coordinated Fertilization
Comparative genomics of Physcomitrella patens gametophytic transcriptome and Arabidopsis thaliana: Implication for land plant evolution
- T. Nishiyama, T. Fujita, M. Hasebe
- Biology, Environmental ScienceProceedings of the National Academy of Sciences…
- 13 June 2003
The haploid transcriptome of P. patens appears to be quite similar to the A. thaliana genome, supporting the evolutionary hypothesis, and revealed that a number of genes are moss specific and were lost in the flowering plant lineage.
Microtubule-dependent microtubule nucleation based on recruitment of gamma-tubulin in higher plants.
It is shown that nucleation requires extant cortical microtubules, onto which cytosolic gamma-tubulin is recruited, and that a cytoplasmic gamma- Tubulin complex shuttles between the cy toplasm and the side of a cortical micro Tubule, and has nucleation activity only when bound to the microtubule.
Microtubule-dependent microtubule nucleation based on recruitment of γ-tubulin in higher plants
It is shown that nucleation requires extant cortical microtubules, onto which cytosolic γ-tubulin is recruited, and that a cytoplasmic γ -tubulin complex shuttles between the cytopLasm and the side of a cortical micro Tubule, and has nucleation activity only when bound to the microtubule.
The Floral Regulator LEAFY Evolves by Substitutions in the DNA Binding Domain
It is reported that the DNA binding domain of LEAFy, although largely conserved, has diverged in activity, and other, more rapidly evolving portions of the protein have few effects on LEAFY activity.