KARAKTERISTIK MORFOLOGI DAN PATOGENESITAS JAMUR PENYEBAB PENYAKIT KARAT TUMOR PADA SENGON GUNUNG (Paraserianthes lophantha)

• Main Authors: , DIPTA SUMERU R, , Dr. Ir. Sri Rahayu, M. P.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/125299/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=65466

Paraserianthes lophantha Willd I. C. Nielsen (cape wattle) is one of member of the Fabaceae Family growing in the Java Mountains. Based on field observation, this plant showed the symptoms of gall rust disease similar to the gall rust disease on Paraserianthes falcataria L. I. C. Nielsen (sengon) and plants from Fabaceae Family. This disease potentially spread out to sengon plantation in community forest. Characteristic of the symptom, morphology and pathogenicity of the rust pathogen causing the gall rust disease on the cape wattle have been unidentified yet. This study aims to identify the characteristic of the symptoms, pathogen morphology, pathogenesis and pathogenicity of the gall rust pathogen on the cape wattle. The characteristic of morphology of the gall rust disease is observed using survey method. The morphology of pathogen is microscopically observed by describing the color, size, and shape of spore. The observation of germination percentage, penetration, and infection is conducted by two treatments which are pathogen inoculation of gall rust disease on the cape wattle to cape wattle and sengon seedlings. Three seedlings as disposable sampling are performed by slicing the seedling with 10 observation units per day for each treatment. The observation of disease incidence is done by Completely Randomized Design (CRD) using inoculums from the gall rust pathogen of cape wattle and Uromycladium tepperianum of sengon inoculated to the sengon seedlings. Each treatment has four replications with 5 sampling units per replication, 40 seedlings in total. The symptoms of the gall rust disease of cape wattle were found in the trunk, branches, twigs, leaves, flowers, and fruits. The symptoms were crimped-foliolum, bent-petiololus, bent-leaves bone and organ-changes-into tumor sized < 1-1,5 cm. A spore was spherical sized 20-28 μm in length and 15-25 μm in width and with ornament in the teliospore wall identified as Uromycladium tepperianum. The spore adhered to the host germinated to basidiospore and then was followed with penetration both directly and through natural orifices. After the penetration penetrated epidermis, the fungus infected and developed in the below of host tissue. U. tepperianum of cape wattle was able to cause the symptom of disease with approximately same intensity of the disease started from day 3 until 30 after inoculation which were 16.2 to 29.2% in sengon and 17.1 to 29.9% in cape wattle.