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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences REINWARDTIA
Tatik Chikmawati
IPB
Agriculture, Biological Sciences & Forestry Education Environmental Science

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A NEW VARIETY OF CANTHIUMERA GLABRA (RUBIACEAE: VANGUERIEAE) Ridha Mahyuni; Ridha Mahyuni; Tatik Chikmawati; Nunik Sri Ariyanti; Anne Kusumawaty
REINWARDTIA Vol 21, No 1 (2022): Reinwardtia
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v21i1.4268

Abstract

MAHYUNI, R., CHIKMAWATI, T., ARIYANTI, N. S. & KUSUMAWATY, A. 2022. A new variety of Canthiumera glabra (Rubiaceae: Vanguerieae). Reinwardtia 21(1): 13‒17. — Canthiumera glabra var. laxiflora (Rubiaceae: Vanguerieae), a new variety from Java and Sumatra is described. The new variety differs from the typical variety in having laxly branched inflorescences and is restricted to south Sumatra (Lampung) and southwestern Java.
Gametophyte Morphology and Development of Six Species of Pteris (Pteridaceae) from Java Island Indonesia Dwi Sunarti Puspitasari; Tatik Chikmawati; Titien Ngatinem Praptosuwiryo
Journal of Tropical Life Science Vol. 5 No. 2 (2015)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.05.02.08

Abstract

The morphology of sporophyte, the type of reproduction, and cytology of Pteris had been reported, while the gametophyte morphology of Pteris in Java island has not been studied yet. The objective of this study was to describe the gametophyte morphology and development of P. biaurita, P. ensiformis,  P.exelsa, P.longipinnula, P. tripartita, and   P. vittata in Java island. Spores were obtained from fertile leaves of Pteris plants originated from several locations in Java island. The number of spores per sporangium were counted from fresh fertile leaves with mature sporangia. As much as 0.002 g spores was sown in transparent box with sterile medium contain of vermiculite, spaghnum moss, and perlite with ratio 2:2:1. The gametophyte development of each species was observed under a microscope every 7 days. The spores of P. ensiformis were germinated faster, 10 days after sowing, while the spores of P.longipinnula were germinated slower, 18 days after sowing.  The pattern of spore germination is Vittaria-type. The development of gametophyte is Ceratopteris-type in common, but in a few cases is the Adiantum-type. The gametophyte development of observed Pteris spesies are varied in six characters including the number of filament cell, germinated time, formation time of notch and gametangia, margin shape, and development type.
Co-Authors Anne Kusumawaty Dwi Sunarti Puspitasari NUNIK SRI ARIYANTI Ridha Mahyuni Ridha Mahyuni Titien Ngatinem Praptosuwiryo