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Plant sciences, sustainable farming systems and food quality
RESEARCH ARTICLE

Seed priming with boron and Bacillus sp. MN54 inoculation improves productivity and grain boron concentration of chickpea

Noman Mehboob A , Waqas Ahmed Minhas A , Muhammad Naeem A , Tauqeer Ahmad Yasir B , Muhammad Naveed C , Shahid Farooq https://orcid.org/0000-0002-6349-1404 D and Mubshar Hussain https://orcid.org/0000-0002-0696-6282 A E *
+ Author Affiliations
- Author Affiliations

A Department of Agronomy, Bahauddin Zakariya University, Multan, Pakistan.

B College of Agriculture, Bahauddin Zakariya University, Bahadur Sub-Campus, Layyah, Pakistan.

C Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan.

D Department of Plant Protection, Faculty of Agriculture, Harran University, Şanlıurfa, Turkey.

E School of Veterinary and Life Sciences, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia.

* Correspondence to: mubashiragr@gmail.com

Handling Editor: Youhong Song

Crop & Pasture Science 73(5) 494-502 https://doi.org/10.1071/CP21377
Submitted: 30 November 2020  Accepted: 5 August 2021   Published: 16 February 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context: The production of chickpea (Cicer arietinum L.) is negatively affected by boron (B) deficiency. In Pakistan, the crop grown under B deficiency produces grains with low B concentration. Application of B-tolerant bacteria (BTB) is a promising option to improve B supply to plants grown under B deficiency.

Aims: This study was focused on determining the appropriate concentration of B for seed priming, and its effects with BTB inoculation on growth, productivity and grain B concentration of chickpea.

Methods: Chickpea seeds were primed in aerated solutions of B concentrations in the range 0.01–0.5% (w/v), with hydroprimed and dry seeds as controls. Concentrations >0.1% proved toxic and seeds failed to germinate. Hence, B was further diluted to concentrations in the range 0.0001–0.1%. Pots containing chickpea seeds were divided into two sets having all B treatments. One set was inoculated with BTB (5 mL per pot of pure Bacillus sp. MN54 culture at 10 9 cfu mL−1); the other set was not inoculated.

Key results: Seed priming with B along with BTB inoculation improved stand establishment, growth, nodulation, yield and grain B concentration of chickpea. Seed priming treatments with B at 0.001% and 0.0001% along with BTB inoculation were most effective for improving stand establishment, seedling growth and grain yield, whereas 0.1% B was more effective for improving grain B concentration.

Conclusions: Seed priming with 0.001% B along with inoculation of Bacillus sp. MN54 improved seed germination, nodulation, yield and grain B concentration of chickpea under B-deficiency conditions.

Implications: Seed inoculation with BTB i.e., Bacillus sp. MN54 coupled with seed priming in 0.001% B solution is a viable option to improve yield and grain B concentration of chickpea grown on B-deficient soils.

Keywords: Cicer arietinum, grain biofortification, growth, nodulation, seedling establishment, seed priming, yield, 100-grain weight.


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