月季切花瓶插期生理变化与衰老关系的研究

STUDIES ON THE PHYSIOLOGICAL CHANGES AND SENESCENCE OF CUT ROSE DURING VASE-HOLDING LIFE

月季切花瓶插期间花瓣中可溶性蛋白质在瓶插初期增加,后期下降。采后花瓣中总游离氨基酸和游离碱性氨基酸含量逐渐上升,游离酸性氨基酸在瓶插前期变化波动不定,但当花瓣衰老时急剧增加。保鲜剂处理(2％蔗糖 +250ppm8-HQ+500ppm柠檬酸+25ppmAgNO_3)能降低氨基酸的上升幅度。花瓣衰老过程中游离氨含量和组织pH值上升,花青素含量下降,保鲜剂处理能阻碍游离氨和pH值的增加,但加快了花青素下降的速率。本文还讨论了切花衰老时花瓣蓝变的原因。

The soluble protein in petals of cut rose flower ( Rosa hybrida Hort. cvs Dame de Coeur and Lady X ) increased at the early stage of vase holding, and decreased later.The concentrations of total free amino acids and basic free amino acids rose throughout the vase life. Acidic free amino acids fluctuated at early holding period,but increased sharply when petal senescence began. The preservative treatment( 2 % sucrose + 250ppm 8 - HQ + 500ppm citric acid + 25ppm AgNO_3)reduced the increment of these amino acids.There were a rise in free ammonia content and pH value of petal tissue, and a drop in anthocyanin content during petal senescence.The preservative treatment delayed the rise of free ammonia and pH, but promoted the loss of anthocyanin.Petal blueing of cut flower was also discussed in this paper.