POLIPLOIDI INTRASPESIFIK PTERIS VITTATA L. (PTERIDACEAE) DI PULAU JAWA

Mugi Mumpuni (Sekolah Pascasarjana, Program Studi Biologi Tumbuhan, Fakultas Matematika dan Ilmu Pengetahuan Alam.)
Tatik Chikmawati (Departemen Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam.)
Titien Ngatinem Praptosuwiryo (Pusat Konservasi Tumbuhan, Kebun Raya Bogor, LIPI)

Floribunda
Vol. 5 No. 2 (2015)

The Chinese ladder brake fern, P.vittata, shows considerable morphological variations and has wide geographical distribution throughout the world. In India and China this species was reported as cryptic species with five cytotypes, namely diploid, triploid, tetraploid, pentaploid and hexaploid, and has basic chromosome number 29. Cytological studies on P. vittata in Indonesia is vew informed. There were two ploidi levels and reproduction type among 37 individuals of P. vittata in Java, sexual tetraploid (2n = 4x = 116) and apogamy pentaploid (2n = 5x = 145). Pentaploid is a new record in Java. The tetraploid and pentaploid types were morphologically not differentiated clearly, but the pentaploid has larger stomata size than that of the tetraploid.