Paclobutrazol leads to enhanced antioxidative protection of sweetpotato under flooding stress

Kuan Hung Lin, Chao Chia Tsou, Shih-Ying Hwang, Long Fang O. Chen, Hsiao Feng Lo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The aim of this research was to study the effect of paclobutrazol pretreatment on the changes of antioxidative enzymes and antioxidants in the flooding-stressed sweetpotato Ipomoea batatas (L.) Lam. 'Tainung 57' was grown in plastic boxes in a screenhouse and maintained in optimal water conditions for 45 days followed by PBZ treatments (0 and 0.5 mg/plant) for 1 day. Then flooding was induced by raising the water level to 5 cm above the soil medium surface for a 5-day period followed by drainage for 2 days. A factorial experiment in randomized complete blocks with three replications was conducted. Young fully expanded leaves from each plant were clipped to measure enzyme activities and antioxidant contents. Increased ascorbate peroxidase activity, total glutathione, oxidized ascorbic acid, and total ascorbic acid amounts on different days of flooding provided the sweetpotato with increased flooding tolerance. The levels of glutathione reductase, ascorbate peroxidase, total glutathione, oxidized ascorbic acid, and malondialdehyde were regulated and elevated by paclobutrazol pretreatment under non-flooded conditions. Paclobutrazol pretreatment increased the levels of all antioxidative enzymes and antioxidants following different flooding durations and drainage, and boosted the flooding tolerance of the sweetpotato.

Original languageEnglish
Pages (from-to)9-18
Number of pages10
JournalBotanical Studies
Volume49
Issue number1
Publication statusPublished - 2008 Jan 1

Fingerprint

paclobutrazol
flooding tolerance
pretreatment
ascorbic acid
ascorbate peroxidase
antioxidants
glutathione
drainage
Ipomoea batatas
enzymes
glutathione-disulfide reductase
malondialdehyde
surface water level
plastics
enzyme activity
duration
leaves
soil
water

Keywords

  • Antioxidant
  • Antioxidative enzyme
  • Flooding
  • Ipomoea batatas (L.) Lam.
  • Paclobutrazol

ASJC Scopus subject areas

  • Plant Science

Cite this

Paclobutrazol leads to enhanced antioxidative protection of sweetpotato under flooding stress. / Lin, Kuan Hung; Tsou, Chao Chia; Hwang, Shih-Ying; Chen, Long Fang O.; Lo, Hsiao Feng.

In: Botanical Studies, Vol. 49, No. 1, 01.01.2008, p. 9-18.

Research output: Contribution to journalArticle

Lin, Kuan Hung ; Tsou, Chao Chia ; Hwang, Shih-Ying ; Chen, Long Fang O. ; Lo, Hsiao Feng. / Paclobutrazol leads to enhanced antioxidative protection of sweetpotato under flooding stress. In: Botanical Studies. 2008 ; Vol. 49, No. 1. pp. 9-18.
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