Effects of Waterlogging with Different Water Resources on Plant Growth and Tolerance Capacity of Four Herbaceous Flowers in a Bioretention Basin

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Title:	Effects of Waterlogging with Different Water Resources on Plant Growth and Tolerance Capacity of Four Herbaceous Flowers in a Bioretention Basin
Authors:	Yang, WC (Yang, Wen-Chi) Lin, KH (Lin, Kuan-Hung) Wu, CW (Wu, Chun-Wei) Chang, YJ (Chang, Yu-Jie) Chang, YS (Chang, Yu-Sen)
Contributors:	園生系
Keywords:	bioretention basins malondialdehyde reclaimed water waterlogging tolerance
Date:	2020-06
Issue Date:	2020-11-05 10:31:07 (UTC+8)
Abstract:	Extreme weather events have increased due to climate change. Bioretention basins can effectively alleviate urban flooding by short-term water retention. Reclaimed water (RW) is considered an alternative water resource during water shortages. In this study, the abilities for waterlogging tolerance of four herbaceous flowers (angelonia, narrow-leaf zinnia, celosia, and medallion flower) are investigated to screen suitable ornamental plants for bioretention basins, and the influence of RW on the plants is also evaluated. All plants were treated with 10 days of waterlogging (electrical conductivity (EC) of tap water = 110.0 mu S center dot cm(-1)) followed by a seven-day recovery. Angelonia (Angeloniasalicariifolia Humb. & Bonpl) was not affected by waterlogging and showed the best performance, judged from the ornamental quality, photosynthesis rate, and leaf malondialdehyde (MDA) among the tested flowers. Photosynthesis of the narrow-leaf zinnia (Zinnia angustifoliaKunth) decreased during waterlogging but soon recovered after being drained. Celosia (Celosia argenteaL.) and medallion flower (Melampodium paludosumKunth) were significantly affected by waterlogging and did not recover after drainage, in terms of responses to both external and physiological reactions. Moreover, waterlogging by the simulated RW (EC = 542.4 mu S center dot cm(-1)) did not have negative impacts on angelonia and narrow-leaf zinnia, due to the reduced leaf malondialdehyde concentration of angelonia and retarded the decline in the net photosynthesis rate of narrow-leaf zinnia. Thus, RW could be used as an alternative irrigation water resource for bioretention basins during the dry season to maintain plant growth.
Relation:	WATER 卷冊: 12 期: 6 文獻號碼: 1619
Appears in Collections:	[Department of Horticulture] journal articles

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