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Effects of boron toxicity on growth, oxidative damage, antioxidant enzymes and essential oil fingerprinting in Mentha arvensis and Cymbopogon flexuosus

Authors
  • Choudhary, Sadaf1
  • Zehra, Andleeb1
  • Naeem, M.1
  • Khan, M. Masroor A.1
  • Aftab, Tariq1
  • 1 Aligarh Muslim University, Aligarh, 202 002, India , Aligarh (India)
Type
Published Article
Journal
Chemical and Biological Technologies in Agriculture
Publisher
Springer International Publishing
Publication Date
May 14, 2020
Volume
7
Issue
1
Identifiers
DOI: 10.1186/s40538-019-0175-y
Source
Springer Nature
Keywords
License
Green

Abstract

BackgroundBoron (B) is an essential micronutrient and necessary to plants for their proper growth. The concentration of B in soil and plant is greatly critical for the growth and productivity. Even at the low amount available in soils, B can be extremely toxic to plants especially in semi-arid and arid environments. In the present study, the effects of high B concentrations (2.5, 5, 10, 20 and 30 mg/kg) were elucidated on two important essential oil-bearing plants; Mentha arvensis and Cymbopogon flexuosus which are aromatic and antimicrobial herbs having well-known medicinal values.ResultsApplication of different concentrations of B showed growth inhibitory effects on plant as evident by shoot and root lengths, fresh and dry weights of shoot in the studied plants. Treatments of B also reduced the total chlorophyll and carotenoid content, chlorophyll fluorescence and reduced the activities of carbonic anhydrase and nitrate reductase enzymes. Moreover, B stress considerably increased the proline content and lipid peroxide content as compared to control. The activities of antioxidant enzymes like catalase, peroxidase and superoxide dismutase were also significantly increased under B stress. The content of essential oil of M. arvensis and C. flexuosus increased at 2.5 mg/kg of B and decreased with further increase in concentrations of B.ConclusionThe findings of present work suggest that increasing concentrations of B inhibited growth and photosynthetic pigments, increased oxidative damage and activities of antioxidant enzymes; however, a mild stress of B increased essential oil production in M. arvensis and C. flexuosus plants.

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