The growth and physiological responses of <i>Alhagi sparsifolia</i> to root cutting and subsequent rewatering

XIAO Bowen; YU Chenglong; Rukeyemu·Abdujilili; ZENG Fanjing; MA Xingyu; HUANG Caibian

doi:10.11829/j.issn.1001-0629.2024-0050

Pratacultural Science > 2025 > 42(1): 77-89. > DOI: 10.11829/j.issn.1001-0629.2024-0050

XIAO B W, YU C L, Rukeyemu·Abdujilili, ZENG F J, MA X Y, HUANG C B. The growth and physiological responses of Alhagi sparsifolia to root cutting and subsequent rewatering. Pratacultural Science, 2025, 42(1): 77-89. DOI: 10.11829/j.issn.1001-0629.2024-0050

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The growth and physiological responses of Alhagi sparsifolia to root cutting and subsequent rewatering

XIAO Bowen^{1, 2,},
YU Chenglong^{1, 3, 4, 5},
Rukeyemu·Abdujilili⁶,
ZENG Fanjing^{1, 3, 5},
MA Xingyu^{1, 3, 4, 5},
HUANG Caibian^{1, 3, 5, ,}

1.
Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration / Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
2.
College Of Life Sciences, Shihezi University, Shihezi 832003, Xinjiang, China
3.
Cele National Station of Observation and Research for Desert Grassland Ecosystem in Xinjiang, Cele 848300, Xinjiang, China
4.
University of Chinese Academy of Sciences, Beijing 100049, China
5.
State Key Laboratory of Desert and Oasis Ecology / Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
6.
Agricultural Technology Extension Centers of Moyu, Moyu 848100, Xinjiang, China

More Information

Corresponding author:
HUANG Caibian　E-mail: huangcaibian@ms.xjb.ac.cn
Received Date: January 22, 2024
Accepted Date: April 09, 2024
Available Online: October 28, 2024

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Abstract

Abstract

Alhagi sparsifolia is the dominant phreatophyte in the southern margin of the Taklimakan Desert and has become seriously degraded; however, its root system has strong regenerative ability. In this study, we investigated the regrowth and changes of leaf structural and physiological characteristics of A. sparsifolia under three root-cutting and rewatering treatments (CK, natural growth; DG, root cutting; DW, root cutting and rewatering) to elucidate the main growth and physiological responses of A. sparsifolia to these treatments. The results showed significant decreases in leaf thickness, saturated water content, and specific leaf area but significant increases in malonaldehyde content of A. sparsifolia under DG and DW treatments during the initial 3 days after root cutting (P < 0.05). All parameter changes were significantly higher than that under CK treatments at each sampling time. These results implied that the A. sparsifolia plants were subjected to obvious water stress under DG and DW treatments. There were no significant changes in leaf thickness, saturated water content, and specific leaf area under DG and DW treatments after the third day of root cutting. However, there were significant increases in leaf tissue density, dry matter content, soluble sugar, proline, and starch contents under DG and DW treatments on the third compared to that on the first day after root cutting. Although these changes were beneficial for A. sparsifolia to adapt to water stress, the reduction in leaf water content was irreversible. All of the shoots of A. sparsifolia under DG and DW treatments withered to death on the 10th day after root cutting. However, new shoots under DW treatment sprouted from the rhizomes of A. sparsifolia on the 30th day after root cutting. These findings indicated that the shoot growth and physiological traits of A. sparsifolia were severely and even irreversibly affected from the third day by root cutting. However, the rhizomes of A. sparsifolia under DW treatment could sprout again because of the rewatering treatment. Therefore, the effects of root cutting on the original aboveground growth of A. sparsifolia can likely be disregarded during future transplantation efforts.
- Alhagi sparsifolia,
- root cutting,
- rewatering,
- leaf traits,
- physiological responses,
- regeneration ability,
- water stress

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