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Faster response to water level increase facilitates Salix cavaleriei survival in Lake Erhai

Wu, Ai Ping LU ; Zhao, Ya-Xuan ; Qi, Liang-Yu ; Zhu, Guo-Rong ; Chen, Fa-Lin ; Liang, Yun-Shan ; Cao, Te and Zhong, Wen (2019) In Journal of Freshwater Ecology 34(1). p.469-480
Abstract

The roles that adventitious roots play in flooding tolerance have been well-studied in willows, while which of the maximum height of adventitious roots and the abundance of adventitious roots in willows is more important for their flooding tolerance is not well known. In this study, we analyzed the effects of adventitious roots on the flooding tolerance of Salix cavaleriei by comparing the maximum height of adventitious roots and the abundance of adventitious roots in dead and live willows along a flooding gradient from 0 to 180 cm in Lake Erhai, China. The results showed that willow mortality increased drastically when the water depth suffered by willows exceeded 100 cm. Live willows developed more adventitious roots and produced them... (More)

The roles that adventitious roots play in flooding tolerance have been well-studied in willows, while which of the maximum height of adventitious roots and the abundance of adventitious roots in willows is more important for their flooding tolerance is not well known. In this study, we analyzed the effects of adventitious roots on the flooding tolerance of Salix cavaleriei by comparing the maximum height of adventitious roots and the abundance of adventitious roots in dead and live willows along a flooding gradient from 0 to 180 cm in Lake Erhai, China. The results showed that willow mortality increased drastically when the water depth suffered by willows exceeded 100 cm. Live willows developed more adventitious roots and produced them higher on the trees compared with dead willows, however, the pest infestation percentage of the dead willows was larger. Additionally, both the maximum height and the abundance of adventitious roots in live willows were significantly correlated with water depth, whereas in dead willows, these variables were not significantly correlated or only weakly correlated with water depth. The results indicate that producing adventitious roots higher on the trees may be more important than developing abundant adventitious roots lower on the trees when S. cavaleriei is subjected to high flooding levels. Our data highlight that a faster adventitious root response promotes this species’ survival under flood stress, although pest infestation accounts for a small percentage of willow mortality. Accordingly, we should choose those willows that can develop more abundant adventitious roots and higher on the stems to plant in regions with abrupt water-level fluctuations.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Adventitious root, flooding, Salix cavaleriei, stress response, water depth
in
Journal of Freshwater Ecology
volume
34
issue
1
pages
12 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85075730310
ISSN
0270-5060
DOI
10.1080/02705060.2018.1542352
language
English
LU publication?
yes
id
968dd5be-9673-406e-aa29-21fe5db2cd02
date added to LUP
2019-12-16 13:34:58
date last changed
2020-01-13 02:36:28
@article{968dd5be-9673-406e-aa29-21fe5db2cd02,
  abstract     = {<p>The roles that adventitious roots play in flooding tolerance have been well-studied in willows, while which of the maximum height of adventitious roots and the abundance of adventitious roots in willows is more important for their flooding tolerance is not well known. In this study, we analyzed the effects of adventitious roots on the flooding tolerance of Salix cavaleriei by comparing the maximum height of adventitious roots and the abundance of adventitious roots in dead and live willows along a flooding gradient from 0 to 180 cm in Lake Erhai, China. The results showed that willow mortality increased drastically when the water depth suffered by willows exceeded 100 cm. Live willows developed more adventitious roots and produced them higher on the trees compared with dead willows, however, the pest infestation percentage of the dead willows was larger. Additionally, both the maximum height and the abundance of adventitious roots in live willows were significantly correlated with water depth, whereas in dead willows, these variables were not significantly correlated or only weakly correlated with water depth. The results indicate that producing adventitious roots higher on the trees may be more important than developing abundant adventitious roots lower on the trees when S. cavaleriei is subjected to high flooding levels. Our data highlight that a faster adventitious root response promotes this species’ survival under flood stress, although pest infestation accounts for a small percentage of willow mortality. Accordingly, we should choose those willows that can develop more abundant adventitious roots and higher on the stems to plant in regions with abrupt water-level fluctuations.</p>},
  author       = {Wu, Ai Ping and Zhao, Ya-Xuan and Qi, Liang-Yu and Zhu, Guo-Rong and Chen, Fa-Lin and Liang, Yun-Shan and Cao, Te and Zhong, Wen},
  issn         = {0270-5060},
  language     = {eng},
  month        = {06},
  number       = {1},
  pages        = {469--480},
  publisher    = {Taylor & Francis},
  series       = {Journal of Freshwater Ecology},
  title        = {Faster response to water level increase facilitates Salix cavaleriei survival in Lake Erhai},
  url          = {http://dx.doi.org/10.1080/02705060.2018.1542352},
  doi          = {10.1080/02705060.2018.1542352},
  volume       = {34},
  year         = {2019},
}