Cyanobacterial inoculation elicits plant defense response and enhanced Zn mobilization in maize hybrids

By R. Prasanna, Ngangom Bidyarani, S. Babu, F. Hossain, Y. Shivay, L. Nain. 2015

106 citations recorded by the source corpus.

Abstract The present investigation evaluated the effect of inoculating different cyanobacterial formulations on a set of hybrids of maize, in terms of plant defense enzyme activity, soil health parameters, Zn concentration, and yields. Microbial inoculation showed significant effects on accumulation of Zn in flag leaf, with A4 (Anabaena–Azotobacter biofilm) recording the highest values. Analysis of variance (ANOVA) indicated that both the hybrids and cyanobacterial treatments brought about significant variation in terms of glomalin-related soil proteins and polysaccharides in soil and the activity of defense enzymes in roots and shoots of the plants. Cyanobacterial inoculants—A4 (Anabaena–Azotobacter biofilm) and A1 (Anabaena sp.–Providencia sp., CW1 + PW5) enhanced the activity of peroxidase, PAL and PPO in roots, which also showed a positive correlation with Zn concentration in the flag leaf. Grain yield ranged from 7.0 to 7.29 t/ha among the different inoculants. Comparative analyses of treatments showed that A3 (Anabaena–Trichoderma-biofilmed formulation) and hybrid B8 (Bio-9681) were superior in terms of parameters investigated. This represents the first report on the genotypic responses of maize hybrids to cyanobacteria-based inoculants. Future research should focus on dissecting the role of root exudates and cyanobacteria-mediated Zn mobilization pathway in maize.

Subfields: Ecology, Evolution, Behavior and Systematics, Plant Science

View Paper: https://www.semanticscholar.org/paper/bc6b6c9596bd43bd6007bdef6c2b8182f874a974

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In Ecology, Evolution, Behavior and Systematics

In Plant Science

Citations in the corpus

Beneficial role of endophytes in biofortification of Zn in wheat genotypes varying in nutrient use efficiency grown in soils sufficient and deficient in Zn (2017, background): “In the past few decades, the focus was on the use of rhizospheric microorganisms to enhance accumulation of micronutrients, Zn in particular, in grains of staple crops like wheat, maize and rice (Abaid-Ullah et al. 2015; Prasanna et al. 2015; Rana et al. 2012).”
Prospecting plant growth promoting bacteria and cyanobacteria as options for enrichment of macro- and micronutrients in grains in rice–wheat cropping sequence (2015, background): “, 2011) or 15–20% through the use of cyanobacterial inoculants in maize (Prasanna et al., 2015).”