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Xanthomonas oryzae pv. oryzae (Xoo), a causal agent of bacterial leaf blight (BLB), is one of the most important pathogens of rice. The effectiveness of ten Streptomyces spp. isolates in suppressing Xoo disease was assessed in planta and in vitro. In planta experiments were carried out in a greenhouse and arranged in a randomized completely block design (RCBD) with three replications. Twenty treatments were tested which included plants inoculated with both Streptomyces spp. and Xoo, and plants inoculated with only Streptomyces spp. Plants inoculated with Xoo and sprayed with a chemical bactericide, and plants inoculated with only Xoo served as positive controls, whereas plants not inoculated with either Streptomyces spp. or Xoo were used as negative controls. The results showed that the effect of endophytic Streptomyces spp. on BLB disease expressed as area under disease progress curve (AUDPC) was not significantly different to that on control plants (P > 0.05). However, plants inoculated with endophytic Streptomyces spp. were significantly taller and produced higher tiller number than control plants (P < 0.05). Streptomyces spp. isolate AB131-1 gave the highest plant height. In vitro studies on biocontrol mechanisms of selected Streptomyces spp. isolates showed that isolate LBR02 gave the highest inhibition activity on Xoo growth, followed by AB131-1 and AB131-2. Two isolates (AB131-1 and LBR02) were able to produce chitinase, phosphatase, and siderophore which included biocontrol characteristics. Morphological and colonization studies under SEM and light microscopy confirmed that the three isolates were endophytic Streptomyces spp. from different species. These studies found that the paddy plant which was inoculated with endophytic Streptomyces spp. AB131-1 and infected by Xoo could increase the height of plant and number of tillers.

HAYATI Journal of Biosciences · Vol. 19 No. 4 (2013)

DOI
10.4308/hjb.19.4.155
ISSN
2086-4094, 1978-3019
Terbit
2013-03-18
Penerbit
Bogor Agricultural University, Indonesia
Bahasa
eng

Abstrak

Xanthomonas oryzae pv. oryzae (Xoo), a causal agent of bacterial leaf blight (BLB), is one of the most important pathogens of rice. The effectiveness of ten Streptomyces spp. isolates in suppressing Xoo disease was assessed in planta and in vitro. In planta experiments were carried out in a greenhouse and arranged in a randomized completely block design (RCBD) with three replications. Twenty treatments were tested which included plants inoculated with both Streptomyces spp. and Xoo, and plants inoculated with only Streptomyces spp. Plants inoculated with Xoo and sprayed with a chemical bactericide, and plants inoculated with only Xoo served as positive controls, whereas plants not inoculated with either Streptomyces spp. or Xoo were used as negative controls. The results showed that the effect of endophytic Streptomyces spp. on BLB disease expressed as area under disease progress curve (AUDPC) was not significantly different to that on control plants (P > 0.05). However, plants inoculated with endophytic Streptomyces spp. were significantly taller and produced higher tiller number than control plants (P < 0.05). Streptomyces spp. isolate AB131-1 gave the highest plant height. In vitro studies on biocontrol mechanisms of selected Streptomyces spp. isolates showed that isolate LBR02 gave the highest inhibition activity on Xoo growth, followed by AB131-1 and AB131-2. Two isolates (AB131-1 and LBR02) were able to produce chitinase, phosphatase, and siderophore which included biocontrol characteristics. Morphological and colonization studies under SEM and light microscopy confirmed that the three isolates were endophytic Streptomyces spp. from different species. These studies found that the paddy plant which was inoculated with endophytic Streptomyces spp. AB131-1 and infected by Xoo could increase the height of plant and number of tillers.

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  • IPB University
  • Indonesian Institute of Sciences
  • Universitas Sumatera Utara
  • University of Indonesia
  • Universitas Pattimura
  • Montana State University
  • State University of Makassar
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Rekan penulisOrganisasiArtikel bersama
İman RusmanaIPB University5
Anja MeryandiniIPB University5
Aris Tri WahyudiIPB University5
Esti PuspitasariIPB University4
Nisa Rachmania MubarikIPB University4
Dwi SuryantoUniversitas Sumatera Utara3
Andreas Adhi SatyaAfiliasi tidak diketahui3
Dedy Duryadi SolihinIPB University3
Widanarni WidanarniIPB University2
Amarila MalikUniversity of Indonesia2
Bibiana W. LayIPB University2
Cecilia Anna SeumahuUniversitas Pattimura2
Sri BudiartiIPB University2
Maria Indah PurnamasariMontana State University2
Rika Indri AstutiIPB University2
Yepy H. RustamAfiliasi tidak diketahui2
Nurul AiniIPB University1
Walter R. ErdelenIPB University1
Muhammad ZairinIPB University1
Ridwan AffandiIPB University1
Yusminah HalaState University of Makassar1
Sukenda SukendaIPB University1
Budi TjahjonoIPB University1
R. HarlingScottish Agricultural College1
SumardiAfiliasi tidak diketahui1
Maggy T HenawidjajaIPB University1
T Resnawati P UrwadariaAfiliasi tidak diketahui1
Ratih Dwi HastutiAfiliasi tidak diketahui1
Yantyati WidyastutiIndonesian Institute of Sciences1
Puspita LisdiyantiIndonesian Institute of Sciences1
Shanti RatnakomalaIndonesian Institute of Sciences1
Nita Rosalinda PrayitnoToronto General Hospital1
Evi TrianaIndonesian Institute of Sciences1
Misa OtoguroUniversity of Yamanashi1
Katsuhiko AndoNational Institute of Technology and Evaluation1
Endang SukaraIndonesian Institute of Sciences1

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Sumber metadata: OAI-PMH (metadata jurnal) http://journal.ipb.ac.id/index.php/hayati/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en"> Xanthomonas oryzae pv. oryzae (Xoo), a causal agent of bacterial leaf blight (BLB), is one of the most important pathogens of rice. The effectiveness of ten Streptomyces spp. isolates in suppressing Xoo disease was assessed in planta and in vitro. In planta experiments were carried out in a greenhouse and arranged in a randomized completely block design (RCBD) with three replications. Twenty treatments were tested which included plants inoculated with both Streptomyces spp. and Xoo, and plants inoculated with only Streptomyces spp. Plants inoculated with Xoo and sprayed with a chemical bactericide, and plants inoculated with only Xoo served as positive controls, whereas plants not inoculated with either Streptomyces spp. or Xoo were used as negative controls. The results showed that the effect of endophytic Streptomyces spp. on BLB disease expressed as area under disease progress curve (AUDPC) was not significantly different to that on control plants (P &gt; 0.05). However, plants inoculated with endophytic Streptomyces spp. were significantly taller and produced higher tiller number than control plants (P &lt; 0.05). Streptomyces spp. isolate AB131-1 gave the highest plant height. In vitro studies on biocontrol mechanisms of selected Streptomyces spp. isolates showed that isolate LBR02 gave the highest inhibition activity on Xoo growth, followed by AB131-1 and AB131-2. Two isolates (AB131-1 and LBR02) were able to produce chitinase, phosphatase, and siderophore which included biocontrol characteristics. Morphological and colonization studies under SEM and light microscopy confirmed that the three isolates were endophytic Streptomyces spp. from different species. These studies found that the paddy plant which was inoculated with endophytic Streptomyces spp. AB131-1 and infected by Xoo could increase the height of plant and number of tillers. </dc:title>
	<dc:creator xml:lang="en">HASTUTI, RATIH DEWI</dc:creator>
	<dc:creator xml:lang="en">LESTARI, YULIN</dc:creator>
	<dc:creator xml:lang="en">SUWANTO, ANTONIUS</dc:creator>
	<dc:creator xml:lang="en">SARASWATI, RASTI</dc:creator>
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	<dc:subject xml:lang="en">"&gt;Xanthomonas oryzae</dc:subject>
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	<dc:subject xml:lang="en">a causal agent of bacterial leaf blight (BLB)</dc:subject>
	<dc:subject xml:lang="en">is one of the most important pathogens of rice. The effectiveness of ten Streptomyces spp. isolates in suppressing Xoo disease was assessed in planta and in vitro. In planta experiments were carried out in a greenhouse and arranged in a randomized completely block design (RCBD) with three replications. Twenty treatments were tested which included plants inoculated with both Streptomyces spp. and Xoo</dc:subject>
	<dc:subject xml:lang="en">and plants inoculated with only Streptomyces spp. Plants inoculated with Xoo and sprayed with a chemical bactericide</dc:subject>
	<dc:subject xml:lang="en">and plants inoculated with only Xoo served as positive controls</dc:subject>
	<dc:subject xml:lang="en">whereas plants not inoculated with either Streptomyces spp. or Xoo were used as negative controls. The results showed that the effect of endophytic Streptomyces spp. on BLB disease expressed as area under disease progress curve (AUDPC) was not significantly different to that on control plants (P &amp;gt</dc:subject>
	<dc:subject xml:lang="en">0.05). However</dc:subject>
	<dc:subject xml:lang="en">plants inoculated with endophytic Streptomyces spp. were significantly taller and produced higher tiller number than control plants (P &amp;lt</dc:subject>
	<dc:subject xml:lang="en">0.05). Streptomyces spp. isolate AB131-1 gave the highest plant height. In vitro studies on biocontrol mechanisms of selected Streptomyces spp. isolates showed that isolate LBR02 gave the highest inhibition activity on Xoo growth</dc:subject>
	<dc:subject xml:lang="en">followed by AB131-1 and AB131-2. Two isolates (AB131-1 and LBR02) were able to produce chitinase</dc:subject>
	<dc:subject xml:lang="en">phosphatase</dc:subject>
	<dc:subject xml:lang="en">and siderophore which included biocontrol characteristics. Morphological and colonization studies under SEM and light microscopy confirmed that the three isolates were endophytic Streptomyces spp. from different species. These studies found that the paddy plant which was inoculated with endophytic Streptomyces spp. AB131-1 and infected by Xoo could increase the height of plant and number of tillers.</dc:subject>
	<dc:description xml:lang="en"> Xanthomonas oryzae pv. oryzae (Xoo), a causal agent of bacterial leaf blight (BLB), is one of the most important pathogens of rice. The effectiveness of ten Streptomyces spp. isolates in suppressing Xoo disease was assessed in planta and in vitro. In planta experiments were carried out in a greenhouse and arranged in a randomized completely block design (RCBD) with three replications. Twenty treatments were tested which included plants inoculated with both Streptomyces spp. and Xoo, and plants inoculated with only Streptomyces spp. Plants inoculated with Xoo and sprayed with a chemical bactericide, and plants inoculated with only Xoo served as positive controls, whereas plants not inoculated with either Streptomyces spp. or Xoo were used as negative controls. The results showed that the effect of endophytic Streptomyces spp. on BLB disease expressed as area under disease progress curve (AUDPC) was not significantly different to that on control plants (P &amp;gt; 0.05). However, plants inoculated with endophytic Streptomyces spp. were significantly taller and produced higher tiller number than control plants (P &amp;lt; 0.05). Streptomyces spp. isolate AB131-1 gave the highest plant height. In vitro studies on biocontrol mechanisms of selected Streptomyces spp. isolates showed that isolate LBR02 gave the highest inhibition activity on Xoo growth, followed by AB131-1 and AB131-2. Two isolates (AB131-1 and LBR02) were able to produce chitinase, phosphatase, and siderophore which included biocontrol characteristics. Morphological and colonization studies under SEM and light microscopy confirmed that the three isolates were endophytic Streptomyces spp. from different species. These studies found that the paddy plant which was inoculated with endophytic Streptomyces spp. AB131-1 and infected by Xoo could increase the height of plant and number of tillers. </dc:description>
	<dc:publisher xml:lang="en">Bogor Agricultural University, Indonesia</dc:publisher>
	<dc:date>2013-03-18</dc:date>
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	<dc:identifier>10.4308/hjb.19.4.155</dc:identifier>
	<dc:source xml:lang="en">HAYATI Journal of Biosciences; Vol. 19 No. 4 (2012): December 2012; 155</dc:source>
	<dc:source>2086-4094</dc:source>
	<dc:source>1978-3019</dc:source>
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