Water deficit is one of the most limiting factors for plant growth and production. Polyamines are osmo-active compounds and have important roles in plant resistance to water limitation. A pot experiment was undertaken in a greenhouse as factorial based on complete randomized block design with three replications to assess the physiological and biochemical responses of safflower to different levels of water supply (100% and 40% field capacity) and spermine (0, 40 and 60 µM). Ascorbate peroxidase and peroxidase activities (POX), malondialdehyde (MDA), hydrogen peroxide (H₂O₂), anthocyanins, soluble protein, soluble sugars and proline contents in shoots increased, while total phenols, flavonoids, and photosynthetic pigments significantly decreased due to water deficit. Foliar spray of spermine mitigated the adverse effects of water deficit by increasing the catalase, superoxide dismutase, POX activities, soluble proteins and photosynthetic pigments, and by decreasing MDA and H₂O₂ contents. Spermine could, therefore, play an important role in protecting photosynthetic system and cellular membranes during drought stress in safflower.

水分亏缺是植物生长和生产的最大限制因素之一。多胺是渗透活性化合物，在植物对水分限制的抵抗中具有重要作用。在温室中进行了一项基于完全随机区组设计的盆栽试验，重复三次，以评估红花对不同水平的供水（100% 和 40% 田间持水量）和精胺（0、40 和60微米）。抗坏血酸过氧化物酶和过氧化物酶活性 (POX)、丙二醛 (MDA)、过氧化氢 (H ₂ O ₂)，由于水分亏缺，芽中花青素、可溶性蛋白、可溶性糖和脯氨酸含量增加，而总酚、黄酮和光合色素显着降低。_{叶面喷施精胺可通过增加过氧化氢酶、超氧化物歧化酶、POX 活性、可溶性蛋白质和光合色素以及降低 MDA 和 H 2} O ₂含量来减轻缺水的不利影响。因此，精胺可以在红花干旱胁迫期间在保护光合系统和细胞膜方面发挥重要作用。