Articles
Changes in the antioxidant system in response to exogenous ethylene during development in ‘Maroussia’ cut rose (Rosa hybrida)
Article number
1315_97
Pages
661 – 664
Language
English
Abstract
As rose is an important cut flower understanding the effects of ethylene on the display life of roses (Rosa × hybrida) was considered important.
In this study the activities of antioxidant enzymes were characterized during rose flower bud development and opening.
Floral stems of the rose cultivar Maruossia were harvested from a commercial greenhouse at 2 stages of flower opening, either as a partially opened bud or fully open.
Flowers were either exposed to 8 μL L‑1 ethylene for between 24 and 48 h or without ethylene, as a control treatment.
The activities of catalase (CAT) and peroxidase (POX) increased when harvested at the bud stage after 24 h.
The activity of CAT gradually increased at the open stage at 48 h after ethylene treatment.
A significant decline in total superoxide dismutase (SOD) activity was observed when harvested at the open stage at 48 h after the ethylene treatment, supporting the hypothesis that loss of SOD can enhance damage against by O2. Higher POX activity than CAT suggests that POX can serve as a better intrinsic defense tool to resist ethylene damage at the open stage.
In this study the activities of antioxidant enzymes were characterized during rose flower bud development and opening.
Floral stems of the rose cultivar Maruossia were harvested from a commercial greenhouse at 2 stages of flower opening, either as a partially opened bud or fully open.
Flowers were either exposed to 8 μL L‑1 ethylene for between 24 and 48 h or without ethylene, as a control treatment.
The activities of catalase (CAT) and peroxidase (POX) increased when harvested at the bud stage after 24 h.
The activity of CAT gradually increased at the open stage at 48 h after ethylene treatment.
A significant decline in total superoxide dismutase (SOD) activity was observed when harvested at the open stage at 48 h after the ethylene treatment, supporting the hypothesis that loss of SOD can enhance damage against by O2. Higher POX activity than CAT suggests that POX can serve as a better intrinsic defense tool to resist ethylene damage at the open stage.
Publication
Authors
M. Bayanati, K. Razavi, A. Tehranifar, N. Ahmadi
Keywords
catalase, ethylene, flower senescence, peroxidase, superoxide dismutase
Groups involved
- Division Temperate Tree Fruits
- Division Vine and Berry Fruits
- Division Tropical and Subtropical Fruit and Nuts
- Division Ornamental Plants
- Division Plant-Environment Interactions in Field Systems
- Division Postharvest and Quality Assurance
- Division Horticulture for Development
- Division Precision Horticulture and Engineering
- Division Plant Genetic Resources, Breeding and Biotechnology
- Commission Cultivar Registration
- Division Horticulture for Human Health
- Division Greenhouse and Indoor Production Horticulture
- Division Landscape and Urban Horticulture
- Commission Banana
- Division Vegetables, Roots and Tubers
- Division Temperate Tree Nuts
- Commission Agroecology and Organic Farming Systems
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