Shading Reduced the Injury Caused by Winter Chill on Pitaya Plant

Authors

  • Li WANG 1) South China Agricultural University, College of Horticulture, Guangzhou, 510642 2) Guizhou Academy of Agricultural Sciences, Institute of Pomology Science, Guiyang, 550009 (CN)
  • Xue ZHANG Guizhou Academy of Agricultural Sciences, Institute of Pomology Science, Guiyang, 550009 (CN)
  • Weili CHEN South China Agricultural University, College of Horticulture, Guangzhou, 510642 (CN)
  • Tujian XIAO Guizhou Academy of Agricultural Sciences, Institute of Pomology Science, Guiyang, 550009 (CN)
  • Xiaozhen ZHAO Guizhou Academy of Agricultural Sciences, Institute of Pomology Science, Guiyang, 550009 (CN)
  • Yuhua MA Guizhou Academy of Agricultural Sciences, Institute of Pomology Science, Guiyang, 550009 (CN)
  • Xuming HUANG South China Agricultural University, College of Horticulture, Guangzhou, 510642 (CN)

DOI:

https://doi.org/10.15835/nbha47111364

Keywords:

antioxidant enzyme; chlorophyll; MDA; proline; ROS

Abstract

Pitaya (Hylocereus undatus Britton & Rose) is widely cultivated in subtropical and tropical regions. Pitaya is cold-sensitive; most cultivars are injured during chilling winter periods, especially in subtropical regions. In this study, the effects of shading on the cold tolerance in pitaya plant were investigated. Pitaya plants were grown under full sunlight (control) or a shading net with a light blocking rate of about 60%. Morphological and physiological performance of the overwintering pitaya plants were compared between the control and the shaded treatment. The results showed that shading treatment markedly reduced the chilling induced tissue necrosis. Contents of chlorophyll a, chlorophyll b, and total chlorophylls (chlorophyll a+b), the chlorophyll a/b ratio, Fm and Fv/Fm were all higher in shading treatment than those in the control. Meanwhile, proline content and ascorbic acid peroxidase (APX) activity in the shading treatment were significantly increased, while malondialdehyde (MDA), the superoxide anion (O2.-) and hydrogen peroxide (H2O2) levels were significantly decreased by shading treatment. The results indicated that damage caused by chilling stress on pitaya was, at least partially, light-dependent; and in practical production, shading treatment can be used to reduce chilling injury in pitaya.

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Published

2018-12-21

How to Cite

WANG, L., ZHANG, X., CHEN, W., XIAO, T., ZHAO, X., MA, Y., & HUANG, X. (2018). Shading Reduced the Injury Caused by Winter Chill on Pitaya Plant. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47(2), 470–477. https://doi.org/10.15835/nbha47111364

Issue

Vol. 47 No. 2 (2019)

Section

Research Articles
CITATION
DOI: 10.15835/nbha47111364

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Copyright (c) 2018 Li WANG, Xue ZHANG, Weili CHEN, Tujian XIAO, Xiaozhen ZHAO, Yuhua MA, Xuming HUANG

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