e-journal

Plant Growth-Promoting Rhizobacteria Associated with Ancient Clones of Creosote Bush (Larrea tridentata)

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Abstract
Plant growth-promoting rhizobacteria (PGPR) are common components of the rhizosphere, but their role in
adaptation of plants to extreme environments is not yet understood. Here, we examined rhizobacteria associated with ancient clones of Larrea tridentata in the Mohave desert, including the 11,700-year-old King Clone, which is oldest known specimen of this species. Analysis of unculturable and culturable bacterial community by PCR-DGGE revealed taxa that have previously been described on agricultural
plants. These taxa included species of Proteobacteria, Bacteroidetes, and Firmicutes that commonly carry
traits associated with plant growth promotion, including genes encoding aminocyclopropane carboxylate deaminase and β–propeller phytase. The PGPR activities of three representative isolates from L. tridentata were further confirmed using cucumber plants to screen for plant growth promotion. This study provides an intriguing first view of the mutualistic bacteria that are associated with some of the
world’s oldest living plants and suggests that PGPR likely contribute to the adaptation of L. tridentata and other plant species to harsh environmental conditions in desert habitats.

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Informasi Detail

Judul Seri

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No. Panggil

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Penerbit

: Springer-Verlag., 2012

Deskripsi Fisik

Microb Ecol (2012) 64:1008–1017 DOI 10.1007/s00248-012-0071-5

Bahasa

English

ISBN/ISSN

1432-184X

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

EKOLOGI
MIKROBIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

ETY

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