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Analysis of Aluminum Stress-induced Differentially Expressed Proteins in Alfalfa Roots Using Proteomic Approach

  • Kim, Dong-Hyun (Division of Applied Life Sciences (BK21), IALS, Gyeongsang National University) ;
  • Lee, Joon-Woo (Division of Applied Life Sciences (BK21), IALS, Gyeongsang National University) ;
  • Min, Chang-Woo (Division of Applied Life Sciences (BK21), IALS, Gyeongsang National University) ;
  • Rahman, Md. Atikur (Division of Applied Life Sciences (BK21), IALS, Gyeongsang National University) ;
  • Kim, Yong-Goo (Division of Applied Life Sciences (BK21), IALS, Gyeongsang National University) ;
  • Lee, Byung-Hyun (Division of Applied Life Sciences (BK21), IALS, Gyeongsang National University)
  • Received : 2022.09.14
  • Accepted : 2022.09.24
  • Published : 2022.09.30

Abstract

Aluminum (Al) is one of the major factors adversely affects crop growth and productivity in acidic soils. In this study, the effect of Al on plants in soil was investigated by comparing the protein expression profiles of alfalfa roots exposed to Al stress treatment. Two-week-old alfalfa seedlings were exposed to Al stress treatment at pH 4.0. Total protein was extracted from alfalfa root tissue and analyzed by two-dimensional gel electrophoresis combined with MALDI-TOF/TOF mass spectrometry. A total of 45 proteins differentially expressed in Al stress-treated alfalfa root tissues were identified, of which 28 were up-regulated and 17 were down-regulated. Of the differentially expressed proteins, 7 representative proteins were further confirmed for transcript accumulation by RT-PCR analysis. The identified proteins were involved in several functional categories including disease/defense (24%), energy (22%), protein destination (9%), metabolism (7%), transcription (5%), secondary metabolism (4%), and ambiguous classification (29%). The identification of key candidate genes induced by Al in alfalfa roots will be useful to elucidate the molecular mechanisms of Al stress tolerance in alfalfa plants.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2015R1D1A1A01060495).

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