பிரிட்டிஷ் ஜர்னல் ஆஃப் ரிசர்ச் திறந்த அணுகல்

சுருக்கம்

Araucaria: A Relict Genus

Teena Agrawal

Gymnosperms have very important phylogenetic values among the all plants group. They are intermediate among the top of the angiosperms and the other lower plant group. This group shows tremendous kind of development in Mesozoic era. However; at the end of the cretaceous one can see the rapid decline in the species. Araucaria is the genus of the great values. They have the reservoirs of the many conserved sequences which show the clear pathways of the evolution. New Caledonia near Australia is a heaven of Araucaria. Near Chile the tribal people use those plants for several purposes. This is the best ornamental tree and this plant is near the edges of the extinction. So internationally efforts are needed for saving these plants.