Ascorbate Acid Increases Tolerance to Water Deficit Stress in Flowers of Cut Roses ( Rosa hybrida L. ) Caused by Enhanced Ascorbate Peroxidase Activity

ACTA HORTICULTURAE SINICA ›› 2006, Vol. 33 ›› Issue (2): 333-337.

• 研究论文 • Previous Articles Next Articles

Ascorbate Acid Increases Tolerance to Water Deficit Stress in Flowers of Cut Roses ( Rosa hybrida L. ) Caused by Enhanced Ascorbate Peroxidase Activity

Jin Jishi¹;Li Yonghong²;Shan Ningwei¹;and Gao Junping^1*

(¹Department of Ornamental Horticulture and Landscape Architecture, China Agricultural University, Beijing 100094, China; ² School of Applied Chemistry and Biological Engineering, Shenzhen Ploytechnics, Shenzhen 518055, China)

Received:2005-04-06 Revised:2005-08-27 Online:2006-04-25 Published:2006-04-25

Abstract

Abstract: Pretreatmentwith ascorbic acid (AsA) increased tolerance of the flowers of cut roses to water deficit stress. The op timum p retreatment concentrations of AsA and β-aminophenol ( an inhibitor of ascorbate peroxidase, APX) were determined in cut rose‘Samantha’ flowers. Water deficit stress inhibited flower opening and reduced vase life. Pretreatment of 1 000 mg·L^{- 1} AsA improved markedly the flower opening, delayed significantly the increase in relative electric conductivity, and increased obviously AsA content and
APX activity. The negative resultswere obtained when 500 mg·L^{- 1}β-aminophenol pretreatment was used.These results indicate that the improvement of AsA on tolerance to water deficit stress may be related to enhanced APX activity in petals of cut roses.

Key words: Rose, Cut rose, Tolerance to water deficit stress, Ascorbate acid, Ascorbate peroxidase

Jin Jishi;Li Yonghong;Shan Ningwei;and Gao Junping. Ascorbate Acid Increases Tolerance to Water Deficit Stress in Flowers of Cut Roses ( Rosa hybrida L. ) Caused by Enhanced Ascorbate Peroxidase Activity[J]. ACTA HORTICULTURAE SINICA, 2006, 33(2): 333-337.

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Ascorbate Acid Increases Tolerance to Water Deficit Stress in Flowers of Cut Roses ( Rosa hybrida L. ) Caused by Enhanced Ascorbate Peroxidase Activity

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