|Table of Contents|

Effect of Exogenous Sugars on Active Oxygen Balance of Cut Freesia Flowers(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年09期
Page:
140-147
Research Field:
Publishing date:

Info

Title:
Effect of Exogenous Sugars on Active Oxygen Balance of Cut Freesia Flowers
Author(s):
LIU Ya-jie; CHANG Ping; TANG Dong-qin
School of Agriculture and Biology,Shanghai Jiaotong University,Shanghai 200240
Keywords:
Freesia hybrid; vase holding; petals aging; active oxygen balance
PACS:
S 682.2+9
DOI:
-
Abstract:
Taking cut flowers of Freesia hybrid ‘Shangnong Jinhuanghou’ as material,being immersed in 6% glucose solution (treatment group) and distilled water (control),respectively,the changes of antioxidant enzyme activity and membrane lipid peroxidation level in petals during vase holding were studied.The results showed that the vase life of a whole inflorescence was about 10 d,while an individual floret was less than one week.Water absorption content in petals changed obviously during the vase holding,with a decrease in the early stage and picking up after 7 d.Soluble protein content in control showed a trend of gradual decline, while a peak was observed at 4 d in treatment group followed by a constant decrease up to the end of vase holding.Superoxide dismutase (SOD) and catalase (CAT) activities had a consistent trend,rising early and then decreasing during the vase holding.However,peroxidase (POD) activity presented a constant increase trend.Meanwhile,a significant difference in POD activity was observed at different position of freesia at the same vase time,respectively.The content of Malondialdehyde (MDA) accumulated gradually during vase holding,and the higher MDA content was observed in base floret than that in middle floret and upper floret at the same vase time,respectively.The content of super oxygen free radicals (O2) increased obviously at 2 d followed by a drop at 4 d,and then increased up to the end of vase holding.Change trend of treatment group was consist with control,but O2 content was varied in different periods and disparate positions of the inflorescence.The results revealed that the water loss,decreased activity of antioxidant enzymes,the accumulation of O2 and the rising of membrane lipid peroxidation level were considered to be the main causes of senescence of cut Freesia flowers.

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Last Update: 2014-08-13