[Physiological and biochemical mechanism of spermidine improving drought resistance in maize seedlings under drought stress.]

To explore the role of exogenous spermidine (Spd) in enhancing the resistance of maize to drought stress, 15% polyethylene glycol (PEG-6000) was used to simulate drought stress and with 'Xianyu 335' (drought-insensitive) and 'Fenghe 1' (drought sensitive) as the experiment materials, the effects of Spd (0.1 mmol·L为探究外源亚精胺(Spd)在增强玉米干旱胁迫耐受性中的作用,以‘先玉335’(干旱不敏感型)和‘丰禾1’(干旱敏感型)为试验材料,采用营养液水培法,研究了15%聚乙二醇(PEG-6000)模拟干旱胁迫下,外源Spd (0.1 mmol·L