天山北坡山前植物对干旱胁迫的生理响应

doi:10.13866/j.azr.2021.06.20

Abstract

Abstract:

We screened suitable plant species for vegetation restoration in the front mountain zone of the Northern Piedmonts of the Tianshan Mountains. Caragana frutex, Hippophae rhamnoides, Rosa, and Xanthoceras sorbifolia. Under two restoration methods of level furrow and fish-scale pit were used as experimental materials to observe irrigation. Following changes in soil moisture, we analyzed relative water content, chlorophyll, protective enzyme activity, and osmotic adjustment of the four plants under changing soil moisture and evaluated their drought resistance. The results showed decreasing soil moisture, relative leaf water content, and chlorophyll content were significantly reduced, while chlorophyll content of the four plant species in the fish-scale pit decreased faster than level furrow treatment. SOD and POD enzyme activity content of the four plants initially increased, then decreased and returned to initial levels following intense water stress. However, the time to reach its peak differed. Soluble protein, malondialdehyde, and proline content of the four plants all varied in their upward trend with increasing water stress, which were all significant. The comprehensive evaluation of drought resistance of seven physiological indicators for four plants using principal component analysis showed that level furrow is more suitable for vegetation restoration and Caragana frutex and Rosa show better drought resistance suitability.

Key words: vegetation restoration, drought resistance, Northern Piedmonts of the Tianshan Mountains, plant physiology, restoration methods, evaluation of drought resistance

TANG Dong,CHENG Ping,YANG Jianjun,LI Hong,SUN Jianwen,WANG Kai. Physiological responses of plants to drought stress in the Northern Piedmont, Tianshan Mountains[J].Arid Zone Research, 2021, 38(6): 1683-1694.

Figures/Tables 12

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References 39

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恢复方式	植物种	株高/cm	基径/cm	平均冠径/cm
水平沟	锦鸡儿（Caragana frutex）	78±5.34	0.45±0.11	37.3±2.86
	沙棘（Hippophae rhamnoides）	85±7.12	0.32±0.13	42.7±6.62
	蔷薇（Rosa）	112±9.45	0.61±0.07	96.5±5.43
	文冠果（Xanthoceras sorbifolium）	71±6.18	0.42±0.03	63.6±6.67
鱼鳞坑	锦鸡儿（Caragana frutex）	65±6.19	0.44±0.12	32.6±2.84
	沙棘（Hippophae rhamnoides）	82±5.97	0.33±0.09	34.3±3.56
	蔷薇（Rosa）	96±8.28	0.44±0.10	78.6±2.11
	文冠果（Xanthoceras sorbifolium）	58±4.33	0.37±0.06	54.8±6.36

成分	初始特征值		提取载荷平方和
成分	方差百分比	累积/%	方差百分比	累积/%
1	57.30	57.30	57.30	57.30
2	27.64	84.94	27.64	84.94
3	9.21	94.15
4	4.67	98.82
5	0.70	99.52
6	0.45	99.97
7	0.03	100.00

恢复方式	植物种	Y₁	Y₂	综合得分	排序
水平沟	锦鸡儿	2.64	1.74	2.00	1
	沙棘	-1.92	1.27	-0.75	5
	蔷薇	0.29	0.26	0.24	3
	文冠果	-0.99	-1.80	-1.07	7
鱼鳞坑	锦鸡儿	2.98	-0.55	1.55	2
	沙棘	-2.32	1.51	-0.92	6
	蔷薇	0.63	-1.06	0.07	4
	文冠果	-1.30	-1.37	-1.12	8

Physiological responses of plants to drought stress in the Northern Piedmont, Tianshan Mountains

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