Abstract
Shorea javanica was a high dependent plant to ectomycorrhizal symbiosis, dealing with its growth. In Lampung Province, S.javanica standing stock have been hundreds of years, known as repong damar. It's threatened by some deforestation, such as forest fire. This study aimed to analyze the impact of heating on the ability of ectomycorrhizal colonization and analyze the effect of ectomycorrhizal inoculation on the growth of S. javanica . The experiment arranged by randomized complete design with 5 treatments, which were without inoculum, unheated inoculum, soil inoculums heat to 40 o C, 70 o C and 100°C for 24 hours. Soil inoculums are taken under S. javanica standing, at Krui, Pesisir Barat District, Lampung Province. The result analyzed by ANOVA and continued with LSD test. The experiment was conducted for four months. The results show that colonization ectomycorrhiza still existed up to 100 o C and ectomycorrhiza could enhance growth variables, including height, leaves number, leaf area, root length and root dry weight. The best colonization and growth were on 100 o C heating. The heat treatments seem killed some fungus. Only a few fungi could resist and colonize S. javanica roots. Without any competitors, the resist ectomycorrhizal could develop broadly.
Highlights
Simbiotik mutualisme antara tanaman hutan dan mikroba tanah merupakan dasar pokok dalam mengembangkan bioteknologi mikoriza
It's threatened by some deforestation, such as forest fire
This study aimed to analyze the impact of heating on the ability of ectomycorrhizal colonization and analyze the effect of ectomycorrhizal inoculation on the growth of S. javanica
Summary
Prameswari (2004) juga menunjukkan bahwa S. javanica memiliki kemampuan membentuk simbiosis dengan beberapa fungi dari genus Scleroderma, seperti. Di Provinsi Lampung tegakan S. javanica merupakan tegakan yang berumur ratusan tahun dan dikenal dengan sebutan repong damar. Izzo dkk (2006) menyatakan sesungguhnya suhu 70oC nerupakan suhu lethal bagi fungi, namun, beberapa penelitian menunjukkan bahwa ada fungi ektomikoriza masih dapat bertahan hidup dengan suhu mencapai 2000C. Menemukan keberadaan fungi ektomikoriza walaupun dalam jumlah dan jenis yang sangat sedikit, pada lahan yang pernah terbakar. (2012) yang melakukan penelitian pada lahan hutan yang terbakar dan ditumbuhi oleh Pinus sylvestris. Ketergantungan S.javanica terhadap simbiosis dengan ektomikoriza, menyebabkan perlu diketahui, apakah ada jenis ektomikoriza yang masih dapat bertahan di dalam tanah bila terjadi kebakaran hutan di Repong Damar. Pengetahuan tentang keberadaan ektomikoriza ini tentunya akan menjadi kunci penting dalam upaya rehabilitasi tegakan S.javanica bila terjadi kebakaran di lokasi Repong Damar.
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