遮荫对天彭牡丹花色的影响  

Effects of shading on petal color of Tianpeng tree peony

作　　者：周文雯[1] 宋会兴[1] 陈其兵[1] 

机构地区：[1]四川农业大学风景园林学院,四川温江611130

出　　处：《浙江大学学报（农业与生命科学版）》2012年第4期407-412,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家农业科技成果转化资金资助项目(2011GB2F000016);四川省教育厅资助项目(2006A005)

摘　　要：以天彭牡丹‘丹景红2号’为材料,研究在不同光照强度(透光率100%、75%、50%)下天彭牡丹在不同发育阶段的花色变化及其与生理生化参数的相关关系,为改进天彭牡丹栽培措施提供理论依据。结果表明:在不同光照环境条件下,花瓣内花色素苷含量在不同发育阶段的变化趋势不同;在相同发育阶段,花色素苷含量随光照强度的减弱而降低;花色素苷含量与可溶性糖含量在露红期(r=0.992)呈正相关,在盛花期呈负相关(r=-0.972);与可溶性蛋白质含量在露红期(r=0.854)与凋谢期(r=0.833)都呈正相关;与苯丙氨酸解氨酶(PAL)活性在露红期(r=0.974)和盛花期(r=0.907)呈正相关;与多酚氧化酶(PPO)活性呈负相关,且在牡丹盛花期(r=-0.996)和凋谢期(r=-0.868)相关性较高。说明光照强度通过影响可溶性糖、可溶性蛋白质含量以及PAL和PPO活性影响天彭牡丹花色素苷含量,全光照最有利于天彭牡丹花瓣内花色素苷的积累及PAL活性的提高。The anthocyanin contents of petal of Tianpeng tree peony cv. ＇Danjinghong NO. 2＇ were studied at different growth stages and under different light intensities with transmittance of 100%, 75%, 50%. The relationships between the-anthocyanin contents and other physiological indexes, such as soluble sugar content, soluble protein content, activities of phenylalanine ammonialyase （PAL） and polyphenol oxidase （PPO）, were also discussed. The results showed that dynamic changes of anthocyanin contents at different growth stages had different tendency under different light intensities, and anthocyanin content was decreased with the decreasing of light intensity at the same growth stage. The anthocyanin content was positive correlation with soluble sugar content at preliminarily blooming stage （r = 0. 992）, and negative correlation with that at full blooming stage （r =- 0. 972）. The anthocyanin content was also positive correlation with soluble protein content at preliminarily blooming stage （r = 0. 854） and the senescence stage （r = 0. 833）. The activity of PAL showed strong positive correlation with the anthocyanin content at preliminarily blooming stage （r = 0. 974） and full blooming stage （r = 0. 907）, while the activity of PPO showed strong negative correlation with the anthocyanin content at full blooming stage （r = -0. 996） and the senescence stage （r =-0. 868）. It is concluded that complementary illumination is necessary for Tianpeng tree peony in the period of culture, and the changes in soluble sugar content, soluble protein content, PAL and PPO activities under different light intensities are directly responsible for different anthocyanin contents affecting the petal color of Tianpeng tree peony.

关 键 词：天彭牡丹 光照强度 花色素苷 苯丙氨酸解氨酶 多酚氧化酶 

分 类 号：Q945[生物学—植物学] S685.11[农业科学—观赏园艺]