Hoque Tahsina Sharmin, Uraji Misugi, Hoque Md Anamul, Nakamura Yoshimasa, Murata Yoshiyuki
Department of Soil Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.
Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
J Biochem Mol Toxicol. 2017 Jul;31(7). doi: 10.1002/jbt.21901. Epub 2017 Jan 24.
Methylglyoxal (MG) is a highly reactive stress-related α-ketoaldehyde and a physiological metabolite of glycolysis, which is accumulated in ample amount under stressful conditions. In the present study, the effect of different doses of MG on growth, anthocyanin production, MG contents, and activities of two types of glyoxalases (glyoxalase I and glyoxalase II) were examined in Arabidopsis seedlings. MG at 0.1 mM dose did not affect seedling growth, anthocyanin accumulation, MG contents, or activities of glyoxalases, whereas MG at 0.5 mM and 1 mM inhibited seedling growth and induced anthocyanin accumulation, MG accumulation, and glyoxalase (both I and II) activation. Therefore, MG can reduce plant growth as a toxic molecule and can stimulate stress responses as a signal molecule under stress conditions.
甲基乙二醛（MG）是一种与应激相关的高反应性α-酮醛，也是糖酵解的一种生理代谢产物，在应激条件下会大量积累。在本研究中，检测了不同剂量的MG对拟南芥幼苗生长、花青素产生、MG含量以及两种乙二醛酶（乙二醛酶I和乙二醛酶II）活性的影响。0.1 mM剂量的MG不影响幼苗生长、花青素积累、MG含量或乙二醛酶活性，而0.5 mM和1 mM的MG抑制幼苗生长并诱导花青素积累、MG积累以及乙二醛酶（I和II）激活。因此，MG在应激条件下作为一种有毒分子可降低植物生长，并作为一种信号分子刺激应激反应。
