Physiological Responses To Chilling Stress In Anthurium And Its Inductive Resistance

Anthurium andraeanum belongs to Araceae genus schott species, and it is a kind of herbaceous perennial. Anthuriums are tropical flowers, originally discovered in Columbia, and the growth temperature should keep above 14℃. When temperature decreased below 12℃, chilling injury happened in anthurium plants. Three cultivars of anthurium ('Alabamb','Dakote'and'Pink Champion') were used to investigate the effects of low temperature on morphological changes of leaves, changes of REC, MDA and praline content, activities of antioxidant enzymes, and effects of SA and chilling acclimation on induction of chilling resistance. The influence of low temperature and treatments of induction of chilling resistance on physiological mechanism of anthurium plants was determined to provide theoretical basis for cultivation and breeding of anthurium new varieties. Main results are as follows:1. In anthurium leaves, under low temperature, REC increased gradually, membrane permeability greatens, the content of MDA increased, activities of CAT and SOD increased continuously, and POD activities decreased. But with the extension of low temperature time, the effects differed among cultivers. In'Alabamb' leaves, under low temperature, REC increased slowly, CAT activities increased continuously, and SOD activities were relatively stable, while POD activities began to increase and kept at high levels. After 36 h low temperature, REC and content of MDA decreased. In'Dakote'and'Pink Champion', REC and MDA content increased obviously, SOD and CAT activities began to decrease, and POD activities increased sharply.2. SA treatment with the concentration of 300 mg/L could decrease REC and MDA content under low temperature, promote the accumulation of Pro, increase the activities of SOD and CAT, and increase the stability of POD activities.3. Cold acclimation decreased REC and MDA content under low temperature, and enhanced the stability of SOD, CAT and POD activities.