NDLI: Low temperature forcing reduces oxidative stress in lilac flowers

Content Provider	Springer Nature Link
Author	Jędrzejuk, Agata Łukaszewska, Aleksandra Rabiza Świder, Julita Skutnik, Ewa
Copyright Year	2016
Abstract	In common lilac, natural flower bud formation starts in July and proceeds until the end of October, when deep dormancy begins, allowing buds to overwinter. In spring after winter chilling, generative lilac buds resume growth and bloom in May. With the use of forcing procedures, blooming of common lilac is possible in autumn and winter when buds are typically in a deep dormancy state. The temperature commonly used to begin the forcing cycle of lilac in autumn is 37°C, while 16°C is sufficient to induce flowering in March. Such high temperatures applied in November cause degeneration of flowers, which may be due to an oxidative stress following the overproduction of reactive oxygen species (ROS). The aim of this study was to determine and compare the concentration of the ROS hydrogen peroxide (H$_{2}$O$_{2}$); the content of malondialdehyde (MDA), an indicator of lipid peroxidation; and the activity of antioxidant enzymes in flowers of common lilac under natural flowering conditions and forced flowering at 37°C or 15°C. The highest H$_{2}$O$_{2}$ content and the lowest catalase (CAT) activity were observed in lilacs forced at 37°C. Flowers collected from lilacs forced under 15°C had the highest content of soluble proteins, peroxidase (POD), and superoxide dismutase (SOD) activity, and the lowest H$_{2}$O$_{2}$ content. These results indicate that forcing shrubs, even those in a deep dormancy state, under low (15°C) temperature protects the antioxidant defense system and allows the plant to produce panicles of high quality, though the flowering date is delayed compared to the standard forcing procedure conducted at 37°C.
Starting Page	625
Ending Page	632
Page Count	8
File Format	PDF
ISSN	22113452
Journal	Horticulture, Environment, and Biotechnology
Volume Number	57
Issue Number	6
e-ISSN	22113460
Language	English
Publisher	Korean Society for Horticultural Science
Publisher Date	2016-12-10
Publisher Place	Korea
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Plant Breeding/Biotechnology Plant Physiology Agriculture Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture Biotechnology

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