TY - JOUR T1 - Exogenous Spermidine Alleviates Low Temperature Injury in Mung Bean (Vigna radiata L.) Seedlings by Modulating Ascorbate-Glutathione and Glyoxalase Pathway. AU - Nahar,Kamrun, AU - Hasanuzzaman,Mirza, AU - Alam,Md Mahabub, AU - Fujita,Masayuki, Y1 - 2015/12/17/ PY - 2015/10/02/received PY - 2015/12/06/revised PY - 2015/12/08/accepted PY - 2015/12/24/entrez PY - 2015/12/24/pubmed PY - 2016/10/7/medline KW - AsA-GSH cycle KW - abiotic stress KW - glyoxalase system KW - oxidative stress KW - polyamine SP - 30117 EP - 32 JF - International journal of molecular sciences JO - Int J Mol Sci VL - 16 IS - 12 N2 - The role of exogenous spermidine (Spd) in alleviating low temperature (LT) stress in mung bean (Vigna radiata L. cv. BARI Mung-3) seedlings has been investigated. Low temperature stress modulated the non-enzymatic and enzymatic components of ascorbate-glutathione (AsA-GSH) cycle, increased H₂O₂ content and lipid peroxidation, which indicate oxidative damage of seedlings. Low temperature reduced the leaf relative water content (RWC) and destroyed leaf chlorophyll, which inhibited seedlings growth. Exogenous pretreatment of Spd in LT-affected seedlings significantly increased the contents of non-enzymatic antioxidants of AsA-GSH cycle, which include AsA and GSH. Exogenous Spd decreased dehydroascorbate (DHA), increased AsA/DHA ratio, decreased glutathione disulfide (GSSG) and increased GSH/GSSG ratio under LT stress. Activities of AsA-GSH cycle enzymes such as ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR) increased after Spd pretreatment in LT affected seedlings. Thus, the oxidative stress was reduced. Protective effects of Spd are also reflected from reduction of methylglyoxal (MG) toxicity by improving glyoxalase cycle components, and by maintaining osmoregulation, water status and improved seedlings growth. The present study reveals the vital roles of AsA-GSH and glyoxalase cycle in alleviating LT injury. SN - 1422-0067 UR - https://www.unboundmedicine.com/medline/citation/26694373/Exogenous_Spermidine_Alleviates_Low_Temperature_Injury_in_Mung_Bean__Vigna_radiata_L___Seedlings_by_Modulating_Ascorbate_Glutathione_and_Glyoxalase_Pathway_ DB - PRIME DP - Unbound Medicine ER -