Morpho-Biochemical Responses of Brassica Coenospecies to Glyphosate Exposure at Pre- and Post-Emergence Stages

Author:

Kashyap Anamika1,Kumari Sujata1,Garg Pooja1ORCID,Kushwaha Ranjeet1,Tripathi Shikha1,Sharma Jyoti1,Gupta Navin C.1ORCID,Kumar Rajeev Ranjan2ORCID,Vishwakarma Harinder3ORCID,Bhattacharya Ramcharan1,Yadav Rashmi3,Rana Jai Chand4,Rao Mahesh1ORCID

Affiliation:

1. ICAR-National Institute for Plant Biotechnology, Pusa, Delhi 110012, India

2. Division of Forecasting and Agricultural System Modeling, ICAR-Indian Agricultural Statistics Research Institute, Delhi 110012, India

3. ICAR-National Bureau of Plant Genetic Resources, Delhi 110012, India

4. Bioversity International, India Office, Delhi 110012, India

Abstract

Crop wild relatives (CWRs) belonging to the Brassicaceae family possess extensive genetic diversity and have frequently been utilized in the enhancement of cultivated Brassica species. However, their tolerance to glyphosate, a widely used herbicide, has remained unknown. Our study examined the glyphosate response of 20 genotypes from the Brassicaceae family, which included genotypes within the U triangle and their wild relatives. We evaluated their behaviour based on morpho-biochemical responses, specifically focusing on the traits of germination percentage, root length, and survival percentage. By calculating the mean membership function value (MFV) for each genotype’s response to these traits, we classified them into three distinct groups: susceptible, moderately tolerant, and tolerant. Among these genotypes, Brassica rapa (NRCPB rapa 8) demonstrated tolerance to glyphosate, as indicated by their mean MFV value of 0.68. Moderate tolerance to glyphosate was observed in Brassica juncea (Pusa Jaikisan) with a mean MFV of 0.52. Conversely, Diplotaxis catholica, Diplotaxis muralis, and Enarthrocarpus lyratus were susceptible, with mean MFV values of 0.37, 0.35, and 0.34, respectively. These findings revealed varying levels of response to glyphosate among these genotypes, with some displaying significant tolerance. The study provides valuable insights into the herbicide tolerance of Brassica CWRs and emphasizes the potential use of phenotypic and biochemical markers in evaluating herbicide tolerance.

Funder

Alliance of Bioversity International and CIAT

Publisher

MDPI AG

Subject

Agronomy and Crop Science

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