Siti Husna Nurrohmah
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%).
KARAKTERISTIK MORFOLOGI Ganoderma steyaertanum YANG MENYERANG KEBUN BENIH Acacia mangium DAN Acacia auriculiformis DI WONOGIRI, JAWA TENGAH Nur Hidayati; Siti Husna Nurrohmah
Jurnal Pemuliaan Tanaman Hutan Vol 9, No 2 (2015): 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.2015.9.2.117-130

Abstract

Acacia mangium and Acacia auriculiformis seed orchards on the island of Java are associated with a different species of Ganoderma. The importance of G. steyaertanum as a pathogen of forest trees has not been previously highlighted. The aim of this study is to look at the characteristics of the G. steyaertanum which attacks two Acacia seed orchads at Wonogiri Central Java. Activities undertaken are to identify the signs of the G. steyaertanum both in the field and in the laboratory. Characterization of fungi is conventionally done by observing the morphology of signs, such as the shape and color of the fruit body, shape and color of mycelium. Morphological characteristic applied in this study has proved to be effective to identify the pathogen. G. steyaertanum was isolated from fruitbodies of affected trees and pathogenicity tests confirmed Koch’s postulates. Somatic incompatibility tests demonstrated high genetic variability of the pathogen.