Isolasi Dan Seleksi Bakteri Endofit Untuk Pengendalian Penyakit Darah Pada Tanaman Pisang

Abstract

Blood disease is one of the important diseases of banana in Indonesia. Endophytic bacteria have potencies as candidates of biocontrol agents to blood disease, because the bacteria colonized the same ecological niche with the plant pathogens. This research was conducted to isolate endophytic bacteria from banana root, and study their disease suppression ability to blood disease on banana. Ninety isolates of endophytic bacteria have been isolated from the root of banana. Average population densities of bacteria varied between 6,0 x 103 and 4,2 x 105 cfu/g fresh weight of root. Twenty seven isolates positively produced inhibition zone toward blood disease bacterium. Based on plant growth and disease suppression test, ten isolates promoted the growth of banana plant and four isolates suppressed the incidence of blood disease with ranged from 66,67 to 83,33%.

Potensi Bakteri Endofit sebagai Agens Hayati untuk Mengendalikan Penyakit Blas pada Tanaman Padi

“…Bibit padi varietas Cisadane umur 21 hari setelah semai direndam selama 6 jam dalam suspensi bakteri (Marwan et al 2011). Bibit kemudian ditanam pada ember yang berisi media tanam campuran tanah dan pupuk kandang dengan nisbah 1:1 (v/v) yang telah disterilkan.…”

Pathogens causing wilt diseases in patchouli plant (Pogostemon cablin Benth.): A review on symptoms, bioecology, and management

“…Most Pratylenchus species are polyphagous and generally, its life cycle takes 3-4 weeks and stays for months in host plant roots [56]. They steal nutrients and provide sites for secondary pathogens (bacteria and fungi) to penetrate the roots and damage the plants [57]. There are 2 Pratylenchus species on patchouli, P. brachyurus.…”

Untitled

“…Biasanya mekanisme pertahanan tanaman yang terinduksi bersifat lebih luas dan tidak spesifik patogen (Wibowo et al 2010), sehingga tanaman akan lebih tahan terhadap serangan sejumlah patogen tertentu. Menurut Marwan et al (2011), senyawa antibiotik yang dihasilkan oleh bakteri endofit diduga lebih banyak berperan sebagai elicitor untuk menginduksi ketahanan tanaman dibandingkan berperan langsung sebagai penghambat patogen.…”