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Jenis Flora Asing Invasif di Taman Nasional Gunung Gede Pangrango, Jawa Barat Uji, Tahan; Sunaryo,, Sunaryo; Rachman, Erlin; Tihurua, Eka Fatmawati
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 2 (2010): June 2010
Publisher : Universitas Atma Jaya Yogyakarta

Ecological study of Invasive Alien Species (IAS) at two altitudes in Mount Gede PangrangoNational Park was carried out by using quadrate method. The studied plots located at altitude1400 m and 1500 m a.s.l, in 0.2 ha each. The result shows that 45 species of trees, 77 species ofsaplings and 48 species of seedlings were recorded. Five species (i.e. Bartlettina sordida,Austroeupatorium inulaefolium, Cestrum aurantiacum, Brugmansia suaveolens and Passiflorasuberosa) are catagorized as IAS which threaten the ecosystem and natural species.

Biologi Perbungaan Keladi Tikus (Typhonium flageliforme): Seludang Bunga Menghambat Penyerbukan? Rachman, Erlin
Jurnal Natur Indonesia Vol 11, No 2 (2009)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

A study on the flower biology on keladi tikus (T. flageliforme) was conducted to uncover if its spathe inhibitspollination from external pollen resources and causes very low fruit set. The spathe box closely envelopes thesexually vital properties of its inflorenscence. Observation was carried out on some plant clump grown on someuniform potting. A hole was made with scalpel about 4 x 5 mm on a side of the spathe to break its isolation. Somenearer flowers in same clump were left without treatment at all as experimental control. Parameter observed waspresence or absence of seeded fruit setting on spadix. The study result showed that almost all treated flowerspadix per potting, set seeded fruits significantly higher (63, 69 ± 37, 64) than that of controls (3, 57 ± 9, 45) so it isa great possibility that spathe can inhibit partially fruit set. Flower structure and its reproductive phenology werealso described.

AKTIFITAS BIOREPRODUKSI GENERATIF DAN KEMUNGKINAN OTOFERTILISASI PADA BUNGA BEBERAPA JENIS ZINGIBERACEAE MINOR LIAR Rachman, Erlin
BERITA BIOLOGI Vol 4, No 2&3 (1998)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v4i2&3.1283

ApreBminary study on flowers of some wild-minor Zingiberaceae species was conducted to know their generative reproduction andpossiblefertilisation mechanism. Nine species from five wild-minor Zingiberaceae genera grown in Bengkulu Forestry Grand Park :Achasma macrocheilos Griff., A.triorgyale Bak.,Amomum aculeatum Roxb.,A.maxima Roxb.,A.testaceum BJdl, Homstedtia minor VaL, H. scyphus Ret.Nicolaia speciosa Bl, and Zingiber aromaticum VaL, were in situ observed. As much as 90% of the species were found in flowering stage in the study periods, between September and December 1995, 75% of the plants set fruit and seed while 25% set seeded fruit according to native people from neighbour village. All of the flowers showed that many spikelet might be anthesi edper spike per day and were terminally heated on non leafy "stem".Some stigmas observed were occupied by some pollens though pollinator was absent. In addition, stigma - anther distances were very near (0-3 mm).We found that generative bioreproduction was active and productive and autofertili^ation mechanism might be considered to be occurred on the species.

FLOWER BIOLOGY OF TWO DIOSPYROS SPECIES NEIGHBORLY LIVE AT CSC AREA: DO POLLEN VIABILITY AND TUBE GROWTH RATE SHIRE ENDEMIC DISTRIBUTION Rachman, Erlin
Jurnal Teknologi Lingkungan Vol. 9 No. 3 (2008): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Aims of study were to compare flower structure, pollen viability and pollen tube growth rate of two Diospyros species neighborly live in Cibinong Science Centre (CSC) park, Diospyros blancoi and D. celebica, and pursue if pollen-tube growth rate shire reasons endemic distribution of D.celebica in native habitat. Floral structurewas in situ or ex situ morphologically observed. Germination test and pollen tube growth incubation were done in Sarfatti medium and digitally captured and computerize analysis. The result showed that, both species have flower part resemblance each other. D. blancoi has bigger size in almost all flower parts. D. blancoi showed much more pollen viability (41% vs 7%) and tube growth rate than D. celebica1 (66 vs 0.57 μm per minute). Average pollen-tube length of both species at about 31/2 hours incubation was significantly different each other (342.679 ± 37.067 vs 128,673 ± 49,215μm). Most observed D. blancoi female trees set high number of fruit year to year and almost observed D. celebica female trees set very low number of fruit and some time without fruit in the year. It is associated with geographical distribution difference between the two species. Very significantlydifferent in pollen-germination percentage and pollen-tube growth rate provide a tool of further study to know microenvironment for reproduction and propagation of the endemic species, D. celebica.

FLOWER BIOLOGY OF TWO DIOSPYROS SPECIES NEIGHBORLY LIVE AT CSC AREA: DO POLLEN VIABILITY AND TUBE GROWTH RATE SHIRE ENDEMIC DISTRIBUTION Erlin Rachman
Jurnal Teknologi Lingkungan Vol. 9 No. 3 (2008): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Aims of study were to compare flower structure, pollen viability and pollen tube growth rate of two Diospyros species neighborly live in Cibinong Science Centre (CSC) park, Diospyros blancoi and D. celebica, and pursue if pollen-tube growth rate shire reasons endemic distribution of D.celebica in native habitat. Floral structurewas in situ or ex situ morphologically observed. Germination test and pollen tube growth incubation were done in Sarfatti medium and digitally captured and computerize analysis. The result showed that, both species have flower part resemblance each other. D. blancoi has bigger size in almost all flower parts. D. blancoi showed much more pollen viability (41% vs 7%) and tube growth rate than D. celebica1 (66 vs 0.57 μm per minute). Average pollen-tube length of both species at about 31/2 hours incubation was significantly different each other (342.679 ± 37.067 vs 128,673 ± 49,215μm). Most observed D. blancoi female trees set high number of fruit year to year and almost observed D. celebica female trees set very low number of fruit and some time without fruit in the year. It is associated with geographical distribution difference between the two species. Very significantlydifferent in pollen-germination percentage and pollen-tube growth rate provide a tool of further study to know microenvironment for reproduction and propagation of the endemic species, D. celebica.

Jenis Flora Asing Invasif di Taman Nasional Gunung Gede Pangrango, Jawa Barat Tahan Uji; Sunaryo Sunaryo,; Erlin Rachman; Eka Fatmawati Tihurua
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 2 (2010): June 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v15i2.2694

Ecological study of Invasive Alien Species (IAS) at two altitudes in Mount Gede PangrangoNational Park was carried out by using quadrate method. The studied plots located at altitude1400 m and 1500 m a.s.l, in 0.2 ha each. The result shows that 45 species of trees, 77 species ofsaplings and 48 species of seedlings were recorded. Five species (i.e. Bartlettina sordida,Austroeupatorium inulaefolium, Cestrum aurantiacum, Brugmansia suaveolens and Passiflorasuberosa) are catagorized as IAS which threaten the ecosystem and natural species.

KARAKTER MORFOLOGI DAN POLA PERKECAMBAHAN BIJI Strombosia javanica Bl. (Olacaceae) DALAM KAITANNYA DENGAN SIFAT-SIFAT PARASITISME Erlin Rachman; Sunaryo Sunaryo
BERITA BIOLOGI Vol 4, No 5 (1999)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v4i5.1241

A study on seed germinations of Strombosia javanica BL. was conducted to observe morphological character and germination pattern of the seedling. As many as 134 seeds of the species, originally collected in Bogor Botanical Gardens, were germinated on medium contain soil, sands and compost in same quantity. Germination aspects such as germination patterns and developmental changes were monitored everyday until the first leaves appear. The seed germinations was typically hypogeal and totally spent 160-170 days, and consisted at least six stages: hypocotyl growth, radix primordial formatton, seedling root growth, seed ball lifting, seed ball removal and first leaves appearance. Rather intact seed ball remain exist at the end of hypocotyl vigorously mtil its removal, pmsumably one of special phenomena of the species germination associated to plant parasitism. Functionally, development of the cotyledons were abnormally suppressed by the existence of the seed ball. The cotyledon praphotosynthetic function seems to be replaced by greeny hypocotyl. First leaves development were never occurred before the seed ball removal. Seed coat elimination was able to increase germination initiation in a given time but facilitated damaging bacteria or fungi to contaminate the endosperm.

BIOLOGI PERBUNGAAN JAHE MERAH ( ZINGIBER OFFICINALE ROSC. VAR. RUBRA Erlin Rachman
BERITA BIOLOGI Vol 4, No 4 (1998)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v4i4.1267

A study on floral biology of red ginger (Zingiber officinale var. rubra) was conducted to approach the floral characters and natural obstacles affecting their sexual reproduction. In vivo observation was directly carried out at Treub Laboratory, The R & D Center for Biology, LIPI, mainly on final development aspects of flower: flowering process, anthesis periodicity and pattern,and pollen fertility. The results showed that commonly there was one of more than 20 spikelets in a spike anthesized perday. Final development stage began to be distinguishable from 6.00 or 7.00 am of anthesis day. Anthesis was always begin after 02.00 pm where the earliest was occurred at 02.04 while the latest was 02.55 pm and consist at least of three stages as is initiation, half and full anthesis.The initiation stage was remarkable by calyx breakage,divided into two types of breakage: -type A (directly break, 58.33%) and -type B (indirectly break, 41.67%).The type B group tend to haa shorter duration of anthesis than type A.Generally this variety of ginger has some negative floral characters base on fertility and fruit or seed setting ability such as very low in anthesis frequency, relatively snort duration of anthesis and inefficient stigma anther locality.In other side, this variety also has positive characters of flower such as enough pollen fertility (32 - 45%), low level in flower abortion and never closing flower even at the of the anthesis process

AKTIFITAS BIOREPRODUKSI GENERATIF DAN KEMUNGKINAN OTOFERTILISASI PADA BUNGA BEBERAPA JENIS ZINGIBERACEAE MINOR LIAR Erlin Rachman
BERITA BIOLOGI Vol 4, No 2&3 (1998)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v4i2&3.1283

ApreBminary study on flowers of some wild-minor Zingiberaceae species was conducted to know their generative reproduction andpossiblefertilisation mechanism. Nine species from five wild-minor Zingiberaceae genera grown in Bengkulu Forestry Grand Park :Achasma macrocheilos Griff., A.triorgyale Bak.,Amomum aculeatum Roxb.,A.maxima Roxb.,A.testaceum BJdl, Homstedtia minor VaL, H. scyphus Ret.Nicolaia speciosa Bl, and Zingiber aromaticum VaL, were in situ observed. As much as 90% of the species were found in flowering stage in the study periods, between September and December 1995, 75% of the plants set fruit and seed while 25% set seeded fruit according to native people from neighbour village. All of the flowers showed that many spikelet might be anthesi edper spike per day and were terminally heated on non leafy "stem".Some stigmas observed were occupied by some pollens though pollinator was absent. In addition, stigma - anther distances were very near (0-3 mm).We found that generative bioreproduction was active and productive and autofertili^ation mechanism might be considered to be occurred on the species.

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