NDLI: Growth promotion of cucumber by pure cultures of gibberellin-producing Phoma sp. GAH7

Content Provider	Springer Nature Link
Author	Hamayun, Muhammad Khan, Sumera Afzal Khan, Abdul Latif Tang, Dong Sheng Hussain, Javid Ahmad, Bashir Anwar, Yasir Lee, In Jung
Copyright Year	2009
Abstract	The beneficial effects of plant growth promoting fungi (PGPF) on plant growth and development are well documented. However, limited information is available on gibberellin (GA) production capacity of PGPF of endophytic origin. In current study, 11 fungal endophytes were isolated from cucumber roots and then screened on Waito-C rice, in order to identify plant growth promoting fungal strains. The fungal isolate GAH7 provided the maximum shoot length (11.3 cm) in comparison to control treatment (7.8 cm). In a separate experiment, bioassay of GAH7 significantly promoted growth attributes of cucumber. The GAH7 culture filtrate (CF) was found to contain physiologically active gibberellins in higher concentrations (GA$_{1}$, 0.81 ng/ml; GA$_{3}$, 4.34 ng/ml and GA$_{4}$, 9.31 ng/ml) in conjunction with physiologically inactive GA$_{9}$ (0.74 ng/ml), GA$_{15}$ (0.97 ng/ml), GA$_{19}$ (1.67 ng/ml) and GA$_{20}$ (0.46 ng/ml). Isolate GAH7 produced higher amounts of GA$_{3}$, GA$_{4}$, GA$_{9}$ and GA$_{19}$ than wild type Fusarium fujikuroi, which was used as control for GA production. Gibberellins were analyzed through gas chromatograph/mass spectrometer (GC/MS) with selected ion monitoring (SIM). The fungal isolate GAH7 was later identified as a new strain of Phoma on the basis of sequence homology (99%) and phylogenetic analysis of 18S rDNA sequence.
Starting Page	889
Ending Page	894
Page Count	6
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	26
Issue Number	5
e-ISSN	15730972
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-11-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phoma sp. Gibberellins Endophytic fungi Cucumber Growth promotion Microbiology Environmental Engineering/Biotechnology Applied Microbiology Biochemistry Biotechnology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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