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Expression of CyI Cytoplasmic Actin Genes in Sea Urchin Development
Hahn, Jang-Hee,Raff, Rudolf A. Korean Society for Biochemistry and Molecular Biol 1996 Journal of biochemistry and molecular biology Vol.29 No.5
We present a study of evolutionary changes in expression of actin genes among closely related sea urchin species that exhibit different modes of early development. For this purpose, polyclonal antisera raised against peptides from the carboxyl terminus of the HeCyI cytoskeletal actin of Heliocidaris erythrogramma were used. H. erythrogramma is a direct developing sea urchin that proceeds from embryonic to adult stages without an intervening feeding larval stage. Expression patterns of the CyI actin isoform were compared with those of Heliocidaris tuberculata and to a related sea urchin Strongylocentrotus purpuratus, which both produce a feeding pluteus larval stage. The CyI actin of all three species is expressed in the same cell types. However, its expression patterns have been changed with reorganization of early cell lineage differentiation, which is apparent among the three species. Thus. evolutionary changes in CyI actin gene expression patterns are correlated with not only phylogenetic relationship, but developmental mode. The implication of this observation is that evolutionary changes in expression patterns of histospecific genes may underlie the emergence of novel developmental processes.
Expression of CyI Cytoplasmic Actin Genes in Sea Urchin Development
Jang Hee Hahn,Rudolf A . Raff 생화학분자생물학회 1996 BMB Reports Vol.29 No.5
We present a study of evolutionary changes in expression of actin genes among closely related sea urchin species that exhibit different modes of early development. For this purpose, polyclonal antisera raised against peptides from the carboxyl terminus of the HeCyl cytoskeletal actin of Heliocidaris erythrogramma were used. H. erythrogramma is a direct developing sea urchin that proceeds from embryonic to adult stages without an intervening feeding larval stage. Expression patterns of the Cyl actin isoform were compared with those of Heliocidaris tuberculata and to a related sea urchin Strongylocentrotus purpuratus. which both produce a feeding pluteus larval stage. The Cyl actin of all three species is expressed in the same cell types. However, its expression patterns have been changed with reorganization of early cell lineage differentiation, which is apparent among the three species. Thus. evolutionary changes in Cyl actin gene expression patterns are correlated with not only phylogenetic relationship, but developmental mode. The implication of this observation is that evolutionary changes in expression patterns of histospecific genes may underlie the emergence of novel developmental processes.
Daniele Massa,Alessandra Bonetti,Sonia Cacini,Cecilia Faraloni,Domenico Prisa,Lorenza Tuccio,Raff aella Petruccelli 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.6
Biochar has been reported to improve soil fertility and growing medium performance. However, the role that biochar plays in plant nutrition is not completely understood, especially in plants grown under nutritional stress. Recent research indicates that the addition of biochar increases produce yield of tomato grown under salinity stress and drought; however, little information is available about the effects of biochar on fruit quality parameters. The use of biochar as a growth substrate in an intensive greenhouse cropping system may have the capacity of replacing non-renewable and less sustainable growing media like peat and in addition being a strategy to optimize chemical fertilisation. This work aimed to investigate the effects of biochar, as a potential candidate to replace peat, on tomato growing in soilless conditions under nutritional stress. Plant biomass accumulation, leaf fluorescence and chlorophyll, fruit yield and fruit quality parameters were measured as performance indicators. Biochar increased the green biomass, but it did not significantly affect yield or most quality parameters, apart from potassium content in ripe fruits. These results suggest that biochar has great potential as a peat alternative material and plant growth promoter, but no ability to improve tomato yield, under nutritional stress.