Full Length Research Paper

Effect of PGPR on growth and performance of Zea mays

TSami Ullah12*, Asema Mumtaz1 and Asghari Bano1

Abstract

The present study was aimed to investigate the effect of hormones producing plant growth promoting rhizobacteria on Maize variety EV-5098. The plant growth promoting rhizobacteria were isolated from root and rhisospheric soil of wheat infected with rust and powdery mildew. These plant growths promoting rhizobacteria produced high level of Indole acetic acid and Gibberellic acid in culture. The efficiency of these isolates were checked (evaluated) as bioinoculant on maize. Leaves and roots samples were collected 28 days after treatments. Single inoculation of plant growth promoting rhizobacteria resulted in an increase in proline, sugar, chlorophyll, root length, shoot length and salicylic acid. Among the treatments, co-inoculation was found much effective for protein contents and activities of superoxide dismutase, peroxidase and catalase. The present work revealed that co-inoculated treatments have accumulated heavy metals such as Cr+3, Co+3, Mn+3, Ni+3, Pb+4 and Cd+4. Therefore these bacterial isolates can be used in bioremediation of heavy metals and can be used as bioinoculant. PGPR offer an environmentally sustainable approach to increase crop production and health. The application of molecular tools is enhancing our ability to understand and manage the rhizosphere and will lead to new products with improved effectiveness.

Key words: Maize variety EV-5098, rust, powdery mildew, heavy metals.

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