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Salicylic Acid Counteracts Aluminum Stress-induced Growth and Biomass Yield Reduction in Medicago sativa L.

  • Rahman, Md. Atikur (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration) ;
  • Lee, Sang-Hoon (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration) ;
  • Song, Yowook (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration) ;
  • Ji, Hee Jung (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration) ;
  • Kim, Ki-Yong (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration) ;
  • Choi, Gi Jun (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration) ;
  • Lee, Ki-Won (Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration)
  • Received : 2019.08.21
  • Accepted : 2019.09.10
  • Published : 2019.09.30

Abstract

Salicylic acid (SA) is an essential plant growth regulator that functions as a signaling molecule in plants. The purpose of this study was to clarify how the exogenous application of SA counteracts aluminum stress-induced growth and biomass yield reduction in alfalfa exposed to aluminum (Al) stress. Two-week-old alfalfa seedlings were exposed to a combination of $AlCl_3$ ($0{\mu}M$, $50{\mu}M$ and $100{\mu}M$, respectively) and SA (0.1 mM) for 72 hours. We observed, Al stress-induced plant growth inhibition and forage yield reduction are Al stress-dependent manner. A significant reduction of plant height (42.0-52.9%), leaf relative water content (13.0-21.4%), root length (35.4-48.7%), shoot fresh weight (31.2-25.9%), root fresh weight (15.4-23.3%), shoot dry weight (12.7-22.2%), roots dry weight (47.3-53.5%), were observed in alfalfa. In contrast, SA alleviated the Al-stress and enhanced growth and biomass yield in alfalfa. This study provides useful information concerning the role of SA that counteracts aluminum stress-induced growth and yield reduction in alfalfa.

Keywords

References

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