Gibberellin production and plant growth promotion from pure cultures of <i>Cladosporium</i> sp. MH-6 isolated from cucumber (<i>Cucumis sativus</i> L.)

Hamayun, Muhammad; Khan, Shaukat; Khan, Abdul Latif; Rehman, Gauhar; Kim, Youn‐Ha; Iqbal, Ilyas; Hussain, Javid; Sohn, Eun‐Young; Lee, In‐Jung

doi:10.3852/09-261

Cited by 121 publications

(54 citation statements)

References 34 publications

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“…Mutualistic interactions of fungal species secreting plant growth regulating compounds are of great interest to enhance crop yield and quality (Hamayun et al 2010;Khan et al 2011a). The current study showed that P. formosus application significantly improved plant growth.…”

Section: Discussionmentioning

confidence: 99%

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Khan

Hamayun

Radhakrishnan

et al. 2011

Antonie van Leeuwenhoek

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We investigated in this study the influence of an endophytic fungus, Paecilomyces formosus LHL10, on the thermotolerance of cucumber (Cucumis sativus) upon exposure to high (38°C) and low (8°C) temperature stresses. The results showed that endophyte-inoculated plants had significantly higher plant growth attributes under high-temperature stress. However, they were either low or insignificant in non-inoculated control and inoculated plants with 8°C treatments. Lower stress-promulgated water deficit and cellular membrane damage were observed in endophyte-treated plants after 38°C treatment than in control plants under 8°C stress. Total polyphenol, reduced glutathione, and lipid peroxidation activities were reduced in endophyte-associated plants after exposure to 38°C as compared with control and 8°C-treated plants. The concentration of saturated fatty acids (palmitic-C16:0; stearic-C18:0) was lower in endophyte-treated plants with or without low-temperature stress, but after 8°C treatment increased compared with controls. Unsaturated fatty acids (oleic-C18:1; linoleic-C18:2; linolenic-C18:3 acids) were similar at normal conditions; however, at 38°C, C18:2 and C18:3 were decreased, and C18:1 was increased in endophyte-treated plants compared with controls, while the inverse relationship was found at 8°C. Low levels of abscisic acid in P. formosus-associated plants after 38°C treatments revealed stress tolerance compared with control and 8°C-treated plants. In contrast, salicylic acid was pronounced in endophyte-treated plants after low-temperature stress as compared to other treatments. The results provide evidence that the response to P. formosus association was beneficial at normal growth temperature and had varying effects in response to temperature stress.

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Section: Discussionmentioning

confidence: 99%

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Khan

Hamayun

Radhakrishnan

et al. 2011

Antonie van Leeuwenhoek

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“…Recent studies have shown that plant growth promotion may be attributed to the secretion of plant growth promoting secondary metabolites by the associated microbes (Kobayashi & Columbo, 2000;Hamayun et al 2010). Thus, investigating on plant-microbe interaction and assessing the role of indigenous pre-dominant culturable endophytic and epiphytic bacteria, associated with ethnomedicinal plants, for plant growth promotion and antagonistic activity, is required to maintain the production of medicinal plants for their novel natural products.…”

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confidence: 99%

Epiphytic and endophytic bacteria that promote growth of ethnomedicinal plants in the subtropical forests of Meghalaya, India

Nongkhlaw

Joshi

2014

RBT

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The present study was aimed to investigate the endophytic and epiphytic bacteria associated with selected ethnomedicinal plants from the pristine subtropical forests of Meghalaya and analyse them for plant growth promotion and antagonistic ability. This study is an attempt to explore plant associated bacteria which are beneficial to host plants, and thus aid in the conservation of ethnomedicinal plants of the studied subtropical forests, which are dwindling due to exploitation. The plant growth promotion parameters like indole acetic acid (IAA) production, mineral phosphate solubilisation, acid phosphatase activity, presence of 1-aminocyclopropane-1-carboxylic acid deaminase (ACC) gene, nitrogen fixation, cellulose digestion, chitin and pectin degradation were screened among the isolates. The study revealed significant differences in bacterial population not only between the epiphytic and endophytic microhabitats, but also amongst the host plants. Out of the 70 isolated plant associated bacteria, Bacillus sp., Serratia sp., Pseudomonas sp., Pantoea sp., and Lysinibacillus sp. showed potent plant growth promotion properties. Bacillus siamensis C53 and B. subtilis cenB showed significant antagonistic activity against the tested pathogens. This study indicated the isolates inhabiting the plants prevalent in the subtropical sacred forests could be explored for use as plant growth promoters while practising the cultivation and conservation of ethnomedicinal plants. Rev. Biol. Trop. 62 (4): 1295-1308. Epub 2014 December 01.

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“…Akhtar et al ( 2005 ) reported that 78, 83, 89, and 72 % fungal strains isolated from wheat, maize, potato, and tomato rhizosphere, respectively, were able to produce ethylene in the presence of L -methionine. Reports about phytohormone production by endophytic fungi are also available (Khan et al 2008a , b ;Hamayun et al 2010a ). Khan et al ( 2011a ) reported gibberellin production by endophytic Aspergillus fumigatus sp.…”

Section: Microbial Hormonesmentioning

confidence: 99%

Role of Phytohormones in Stress Tolerance of Plants

Nadeem

Ahmad

Zahir³

et al. 2016

Plant, Soil and Microbes

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Environmental stresses, both biotic and abiotic, cause negative impact on plant growth and development, and plants need to adopt certain strategies for maintaining proper growth under stress conditions. These strategies include certain physiological, biochemical, and molecular mechanisms to cope with these stresses. These mechanisms include the production of hormones (phytohormones) and osmolytes. Phytohormones are organic molecules that affect various plant physiological processes like growth, development, and cell differentiation. Phytohormones regulate key physiological events under normal and stress conditions. They play a vital role for enhancing the ability of plants to adapt to the harsh environmental conditions by mediating a wide range of adaptive responses. These responses enable the plants to acclimatize to adverse soil conditions. Various types of phytohormones play an important function in plants individually or in coordination with each other. The nature and level of these hormones in plants are major factors that infl uence plant processes and functions. The present chapter describes the potential role of phytohormones for promoting plant growth and development under stress conditions. The major classes of plant hormones and their source of production have been described. Metabolism of phytohormones and their physiological responses with special reference to their concentration-dependent or negative impact on plant growth have been discussed in detail. The impact of these hormones on plant growth under stress conditions has been reviewed and discussed with selected examples. Also, the role of microbes in phytohormone production has been elaborated with examples. Future perspectives of the area have also been discussed.

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Gibberellin production and plant growth promotion from pure cultures of Cladosporium sp. MH-6 isolated from cucumber (Cucumis sativus L.)

Cited by 121 publications

References 34 publications

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Epiphytic and endophytic bacteria that promote growth of ethnomedicinal plants in the subtropical forests of Meghalaya, India

Role of Phytohormones in Stress Tolerance of Plants

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