Biopriming of Stevia rebaudiana seeds by plant growth promoting bacteria to improve seed germination

Document Type : Original Article

Authors

1 Botany Department, Faculty of Science, Mansoura University, 35516, Mansoura, Egypt

2 Botany Department, Faculty of Science, Tanta University, 31527, Tanta, Egypt

10.21608/mjb.2021.460279

Abstract

Poor germination and low seedling growth of Stevia rebaudiana Bertoni are common problems in the cultivation of the plant causing scarce plant material and high cost of the product. A consistent, efficient and eco-friendly approach could be the exploitation of biostimulants seedlings and plant-based biostimulants (PBs) as microbial, natural or organic-based, which may have the potential to stimulate plant growth in synergistically. Seed biopriming was performed by four plant growth promoting bacteria; Bacillus cereus, Bacillus licheniformis, Bacillus paralicheniformis and Bacillus paramycoids. Soaking of seeds in bacterial suspension of plant growth promoting strains and in co-culture between them overnight under aseptic condition proves that the significance of co-culture in the improvement of seed germination with percentage up to 40% compared with single strains of 20% and control of 5%.  Therefore, we suggest that seed biopriming with the integrated application of these four biostimulants at an appropriate concentration can enhance the poor germination performance of S. rebaudiana and improves the seedling growth.

Keywords

Mansoura Journal of Biology
Volume 50, Issue 1
March 2021
Pages 22-26

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