Diversity of Endophytic Bacteria in Forest Trees

Izumi, Hironari

doi:10.1007/978-94-007-1599-8_6

Cited by 26 publications

(16 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the present study confirms the potential pathogenicity of P. plurivora to alder seedlings and Haque et al. () demonstrated that P. plurivora was involved in some cases of alder decline along streams in Spain, further studies and surveys, including molecular analyses, are needed to ( i ) confirm the pathogenicity of P. plurivora to alders under a wide range of field conditions, including the presence of endosymbionts (Abraham, Philip, Jacob, & Jayachandran, ; Izumi, ) and ( ii ) to elucidate whether alder decline may have been erroneously attributed to P. alni complex in those cases that the pathogen was not identified.…”

Section: Discussionsupporting

confidence: 56%

Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

2016

View full text Add to dashboard Cite

Summary The ecological importance of riparian forests is well known. However, these forest habitats have been disturbed by human activities over the past century as a result of the introduction of flow regulations. Mortality of the riparian alder population caused by Phytophthora has become an important issue in Europe in the past two decades. The main objective of this study was to examine the pathogenicity of the Phytophthora alni complex (P. xalni, P. uniformis and P. xmultiformis) and P. plurivora in Alnus glutinosa seedlings. Phytophthora alni complex has traditionally been identified as the main causal agent of alder decline; however, in this study, P. plurivora was found to cause as much damage in inoculated seedlings as P. alni complex. In fact, Spanish isolates of P. xalni caused mortality rates of ca. 30%, whereas P. plurivora killed ca. 50% of seedlings. Likewise, there were no differences between P. xalni ‐ and P. plurivora‐inoculated seedlings in either the length of lesion or biomass allocation. The pathogenicity of the species within P. alni complex did not differ significantly. The findings confirm that P. plurivora, which is one of the most common species of Phytophthora found in European nurseries, is highly pathogenic to alder seedlings. Urgent implementation of measures to prevent the risk of spread of the pathogen from nurseries to natural ecosystems is required. Further studies are required to clarify the role that P. plurivora is playing in alder decline both individually and in combination with P. alni complex.

show abstract

Section: Discussionsupporting

confidence: 56%

Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

2016

View full text Add to dashboard Cite

show abstract

“…Tanaman kehutanan terutama jenisjenis yang asli diduga sangat kaya akan mikrob yang bermanfaat, termasuk berbagai jenis mikrob endofit yang sangat beragam [7] . Telah ditemukan sekitar 70 bakteri endofit berhasil diisolasi dari beberapa jenis tanaman obat yang berasal dari hutan subtropis di Meghalaya, India mampu meningkatkan pertumbuhan tanaman dan menekan aktivitas patogen pada tanaman yang diuji [8] .…”

Section: Pendahuluanunclassified

Isolasi, Seleksi, dan Uji Antagonis Bakteri Endofit diisolasi dari Salawaku (Falcataria mollucana) dalam Menekan Pertumbuhan Cendawan Patogen Cercospora spp

2020

View full text Add to dashboard Cite

Penelitian bertujuan untuk mendapatkan isolat bakteri endofit dari akar, daun dan batang Salawaku (Falcataria mollucana) dan menguji kemampuan antagonis bakteri tersebut dalam menekan pertumbuhan cendawan patogen Cercospora spp penyebab penyakit bercak merah pada tanaman Samama (Anthocephalus macrophyllus).Isolasi dilakuka dari dua tanaman sampel yang tumbuh di dua lokasi yang berbeda ketinggian tempat yaitu di Kampus Fakultas Pertanian Unpatti dan Kampus IAIN Ambon. Sebanyak 10 isolat dan 7 isolat diperoleh dari daun dan batang Salawaku di kampus IAIN sedangkan 9 isolat yang terdiri atas 3 isolat dari dari akar, 2 isolat dari batang, dan 14 isolat dari daun Salawaku di Kampus Unpatti. Berdasarkan uji hipersensitif pada tembakau, 19 isolat tidak bersifat patogen. Pengecatan Gram memastikan bahwa 8 isolat sebagai Gram negatif dan 28 isolat sebagai Gram positif. Dari uji antagonis terhadap 18 isolat endofit asal Salawaku terhadap cendawan patogen Cercospora spp. diperoleh dua isolate bakter endofitik yang mampu menekan pertumbuhan patogen Cercospora EDMT14 dan EBBA1 dengan daya hambat berturut-turut 78,04% dan 76,12%.Kata Kunci: antagonis, bakteri endofit, Cercospora spp, Salawaku (Falcataria mollucana)

show abstract

“…Pseudomonas fluorescens can support mycorrhiza formation in forest and non‐forest plants besides growth promotion and protection against pathogens. According to Izumi (), the genera Pseudomonas and Bacillus comprise the major groups of the endophytic bacterial community in forest trees. In previous studies, Bacillus sp., Serratia sp., Pseudomonas sp., Pantoea sp.…”

Section: Discussionmentioning

confidence: 99%

Colonization of Fungi and Bacteria in Stumps and Roots of Scots Pine after Thinning and Treatment with Rotstop

Kubiak

Damszel

Sikora

et al. 2016

Journal of Phytopathology

View full text Add to dashboard Cite

The research areas were located in the Pisz Forest District, northeast Poland, in 10-year-old Scots pine (Pinus sylvestris L.) plantations, established in 2004 on a clear-cut area. Reforestation was performed without a biological treatment against root pathogens, despite the presence of Heterobasidion annosum and Armillaria ostoyae in roots and stumps of trees growing previously. The aim of this research was to evaluate how thinning and treatment with the biological control agent Rotstop influences bacterial and fungal communities within roots and stumps. Twelve months after thinning, samples were collected from five stumps in each of two seasons, autumn and spring, from stands on two types of site, one previously forested and one agricultural (20 stumps in total). Wood samples were cultured on agar media, and (i) fungi in the upper part of the stump and (ii) in roots and (iii) bacteria in roots were genetically identified. Sequences were genetically identified by comparing sequences with records held in the GenBank database. We found great differences in the frequency of both fungi and bacteria in roots: they were more frequent (i) in healthy stumps compared to stumps infected with pathogens (H. annosum and A. ostoyae), (ii) in postagricultural soil than in forest soil and (iii) after spring rather than autumn biological treatment. The introduced species Phlebiopsis gigantea was only identified in the parts of the stumps which were above ground level. The bacterium Paenibacillus pini was associated with the presence of H. annosum infecting the stumps from the roots side. In areas seriously threatened by root pathogens, biological treatment can play only a limited role. It can spread to the upper part and impede the production of fruitbodies; however, it has no impact on the development of pathogens in deeper root areas.

show abstract

Diversity of Endophytic Bacteria in Forest Trees

Cited by 26 publications

References 39 publications

Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

Isolasi, Seleksi, dan Uji Antagonis Bakteri Endofit diisolasi dari Salawaku (Falcataria mollucana) dalam Menekan Pertumbuhan Cendawan Patogen Cercospora spp

Colonization of Fungi and Bacteria in Stumps and Roots of Scots Pine after Thinning and Treatment with Rotstop

Contact Info

Product

Resources

About