Liliana Baskorowati
Balai Besar Penelitian Bioteknologi dan Pemuliaan Tanaman Hutan

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Variasi Ketahanan Terhadap Penyakit karat Tumor pada Sengon Tingkat Semai Liliana Baskorowati; Siti Husna Nurrohmah
Jurnal Pemuliaan Tanaman Hutan Vol 5, No 3 (2011): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2011.5.3.129-138

Abstract

The most seriouse affecting Sengon (Sengon (Falcataria moluccana) plantation is Gall rust is coused by the fungus Uromycladium tepperianum (Sacc.) McAlp. This disease reduced the yield due to mortality and stems brakage (fllowing the formation of stem-girdling galls) reduced marketability and  decreased of ghrowth rates. This research aimed to select seedlings sengon which is tolerant to gall rust disease at provenence level, Five seed sources were used for this study i.e. from Papua (Elaigama Hubikosi and Siba Hubikosi) and Java (Candiroto, Kediri and Wonosobo). Inoculation was carried using fresh spora of Uromycladium tepperianum, There times when the seedlingreaches two weeks old. Then obsevation has been done for height and symptom scoring for evaluating disease incidence and severity. The result showed there were variations for height, disease incidence and disease severity. Seedlings sengon from Papua exhibited growth (height) about 6,5-12,2 cm,  and seedlings from Java. It recorded that seedlings from Papua exhibited 0% of disease incidence ansd disease severity, meanwhile seedling from java is more susceptible to the gall rust, by which exhibited hight value of disease incidence (86-94 %0 and disease severity (53-60%).
IMPLIKASI BIOLOGI REPRODUKSI TERHADAP KONSERVASI GENETIK JENIS Santalum album Liliana Baskorowati
Jurnal Pemuliaan Tanaman Hutan Vol 5, No 1 (2011): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2011.5.1.1-11

Abstract

Santalum album is one of the extinct species which need to be conserved. Therefore, the information of reproductive biology of this species, especially the pollination system can produce important clues in order to conserve it.  Preliminary study of pollination system of S. album was conducted at ex-situ conservation plot at Watusipat, Gunung Kidul, Yogyakarta. The observations showed that S. album flowers categorised as protandrous, which structured acropetally; this structure may lead self-pollination within a spike. However, result from artificial pollination showed that S. album was a predominantly out crossing species. Very low level of seeds setted from self-pollinated flowers indicated that pollinator was needed for reproduction process. Observation revealed that European honey bee (Apis mellifera) was one of potential pollinating agents.
Pengaruh Suhu dan Hormon Pertumbuhan Terhadap Produksi Bunga Stek Pucuk Melaleuca Alternifolia Liliana Baskorowati
Jurnal Pemuliaan Tanaman Hutan Vol 3, No 1 (2009): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2009.3.1.43-52

Abstract

Melaleuca alternifolia is the main source for Australian tea tree production. Improving oil quality has been attempted by controlled cross pollination between plus trees. The availability of flowers during flowering season is important for control pollination between , therefore the work to  stimulate flowering should be done. The objective of this study was to increase the flora bud production of 24 month cuttings of M. alternifolia by application of growth retardant (paclobutrasol) and exposure to low  temperatures. Results showed that the application of paclobutrazol was not effective to increase the number of floral buds production. Paclobutrazol application effected only some morphological characteristics. Such as reduced height, smaller leaves, and shorter internodes. On the other hand, exposure of shoot cutting to low temperature for 4 months period increased the number of floral buds and paclobutrazol application following exposure to low temperature was then assumed to have been responsible for the floral response..