Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: perforation plate

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

The progressive and ancestral traits of the secondary xylem within Magnolia clad - the early diverging lineage of flowering plants

100%

Wroblewska M. M.

Acta Societatis Botanicorum Poloniae

2015

tom 84

nr 1

The qualitative and quantitative studies, presented in this article, on wood anatomy of various species belonging to ancient Magnolia genus reveal new aspects of phylogenetic relationships between the species and show evolutionary trends, known to increase fitness of conductive tissues in angiosperms. They also provide new examples of phenotypic plasticity in plants. The type of perforation plate in vessel members is one of the most relevant features for taxonomic studies. In Magnolia, until now, two types of perforation plates have been reported: the conservative, scalariform and the specialized, simple one. In this paper, are presented some findings, new to magnolia wood science, like exclusively simple perforation plates in some species or mixed perforation plates – simple and scalariform in one vessel member. Intravascular pitting is another taxonomically important trait of vascular tissue. Interesting transient states between different patterns of pitting in one cell only have been found. This proves great flexibility of mechanisms, which elaborate cell wall structure in maturing tracheary element. The comparison of this data with phylogenetic trees, based on the fossil records and plastid gene expression, clearly shows that there is a link between the type of perforation plate and the degree of evolutionary specialization within Magnolia genus.

Ograniczanie wyników

1 Acta Societatis Botanicorum Poloniae

1 Wroblewska M. M.

1 2015

Wyniki wyszukiwania

The progressive and ancestral traits of the secondary xylem within Magnolia clad - the early diverging lineage of flowering plants