短期环割对塔克拉玛干沙漠南缘两种荒漠植物的生理影响

doi:10.3724/SP.J.1258.2013.00113

植物生态学报 ›› 2013, Vol. 37 ›› Issue (12): 1101-1113.DOI: 10.3724/SP.J.1258.2013.00113

短期环割对塔克拉玛干沙漠南缘两种荒漠植物的生理影响

唐钢梁¹^,²^,³, 李向义¹^,³^,^*(), 林丽莎¹^,³, 李磊¹^,²^,³, 鲁建荣¹^,²^,³

¹中国科学院新疆生态与地理研究所, 乌鲁木齐 830011
²中国科学院大学, 北京 100049
³新疆策勒荒漠草地生态系统国家野外科学观测研究站, 新疆策勒 848300

收稿日期:2013-06-03 接受日期:2013-10-08 出版日期:2013-06-03 发布日期:2013-12-04
通讯作者: 李向义
作者简介:* E-mail: lixy@ms.xjb.ac.cn
基金资助:
国家科技支撑项目(2009BAC54B03);新疆维吾尔自治区科技支撑计划项目(200933-125);国家重点基础研究发展计划(2009CB421-303)

Effects of short-term phloem girdling on physiology in two desert plants in the southern edge of the Taklimakan Desert

TANG Gang-Liang¹^,²^,³, LI Xiang-Yi¹^,³^,^*(), LIN Li-Sha¹^,³, LI Lei¹^,²^,³, LU Jian-Rong¹^,²^,³

¹Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, China
²Graduate University of Chinese Academy of Sciences, Beijing 100049, China
³Cele National Station of Observation & Research for Desert Grassland Ecosystem, Cele, Xinjiang 848300, China

Received:2013-06-03 Accepted:2013-10-08 Online:2013-06-03 Published:2013-12-04
Contact: LI Xiang-Yi

摘要/Abstract

摘要：

随着气候条件的改变, 人口和载畜量的日益增加, 塔克拉玛干沙漠南缘策勒绿洲主要植物种群花花柴(Karelinia caspia)和骆驼刺(Alhagi sparsifolia)正遭受日益严重的虫噬、放牧等机械损伤的影响, 干扰因子对花花柴和骆驼刺的影响日趋明显。以塔克拉玛干南缘沙漠策勒绿洲主要建群种花花柴和骆驼刺为材料, 测量了韧皮部环割处理10天后, 光合色素含量和光系统II (PSII)叶绿素荧光的变化。结果表明: (1)在韧皮部半割处理下, 花花柴、骆驼刺的光合色素含量和叶绿素荧光变化都不明显。(2)在韧皮部全割处理下, 花花柴、骆驼刺的光合色素含量和叶绿素荧光各参数变化较大, 在该处理下, 两种植物光合原初反应被抑制, PSII结构和功能遭到损害, 活性降低, 光合器官对光能的吸收、传递、转化和电子捕获等过程被抑制。(3)韧皮部全割对花花柴和骆驼刺各生理状况产生较大影响, 相比而言, 环割对花花柴的影响更为持久。对于单个植株而言, 机械损伤对花花柴的破坏损伤更为显著。(4)在环割对花花柴和骆驼刺光合速率的影响中, 存在着依赖于碳水化合物(carbohydrate-dependent)的机制。

关键词: 骆驼刺, 叶绿素荧光, 环割, 花花柴, 光合色素

Abstract:

Aims Our general objective was to understand the effects of short-term phloem girdling on physiological performance in Karelinia caspia and Alhagi sparsifolia, concerning not only the impacts of degrees of girdling but also the differences in damage between the two plants under girdling treatment. Specifically, we want to know the mechanisms of the decline in photosynthesis under girdling treatment.
Methods We imposed three different types of girdling treatments, normal branch, semi-girdling, and full-girdling, and studied the reaction of photosynthetic pigments, chlorophyll fluorescence parameters in K. caspia and A. sparsifolia under the conditions of girdling after about 10 days.
Important findings The effects varied with the type of girdling treatments and differed between K. caspia and A. sparsifolia. There was no apparent effect on physiological parameters in K. caspia with semi-girdling treatment; whereas full-girdling significantly reduced chlorophyll content and carotenoids content in both K. caspia and A. sparsifolia. The full-girdling also constrained the primary photosynthetic reaction in K. caspica and A. sparsifolia, and damaged the structure and function of photosystem II (PSII), leading to reduction in the activity of PSII. The processes of absorption, transmission, conversion, and electron capture of light energy in photosynthetic organs were also constrained, and the energy used for dissipate significantly increased. We believe the degree of damage in K. caspia under full-girdling is more severe than in A. sparsifolia. As the disturbance in Cele Oasis is further exacerbated, whether the population of A. sparsifolia could adapt to this change better than K. caspia is still inclusive, because the resilience of plants is also an essential factor. There exist a carbohydrate-dependent mechanism in the effects on photosynthetic rate in K. caspia and A. sparsifolia subjected to girdling.

Key words: Alhagi sparsifolia, chlorophyll fluorescence, girdling, Karelinia caspia, photosynthetic pigment

唐钢梁, 李向义, 林丽莎, 李磊, 鲁建荣. 短期环割对塔克拉玛干沙漠南缘两种荒漠植物的生理影响. 植物生态学报, 2013, 37(12): 1101-1113. DOI: 10.3724/SP.J.1258.2013.00113

TANG Gang-Liang, LI Xiang-Yi, LIN Li-Sha, LI Lei, LU Jian-Rong. Effects of short-term phloem girdling on physiology in two desert plants in the southern edge of the Taklimakan Desert. Chinese Journal of Plant Ecology, 2013, 37(12): 1101-1113. DOI: 10.3724/SP.J.1258.2013.00113

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链接本文: https://www.plant-ecology.com/CN/10.3724/SP.J.1258.2013.00113

https://www.plant-ecology.com/CN/Y2013/V37/I12/1101

图/表 3

图1 韧皮部环割对花花柴和骆驼刺叶片光合色素含量的影响(平均值±标准偏差)。Car, 类胡萝卜素; Chl, 叶绿素。CK, 对照组; FG, 韧皮部全割; SG, 韧皮部半割。不同字母表示差异达到显著水平(p < 0.05)。

Fig. 1 Effects on photosynthetic pigments in leaves of Karelinia caspia and Alhagi sparsifolia by phloem girdling (mean ± SD). Car, carotenoid; Chl, chlorophyll. CK, control; FG, full-girdling; SG, semi-girdling. Different letters indicate significant difference (p < 0.05).

图2 韧皮部环割对花花柴和骆驼刺PSII原初光化学效率和初始荧光参数的影响(平均值±标准偏差)。不同字母表示差异达到显著水平(p < 0.05)。CK、FG、SG同图1。Fo, 初始荧光; Fm, 最大荧光; Fv, 可变荧光; Fv/Fo, PSII潜在活性; Fv/Fm, PSII最大光化学量子产量; Mo, 荧光诱导曲线初始斜率。

Fig. 2 Effects on PSII photochemical efficiency and initial fluorescence parameters in Karelinia caspia and Alhagi sparsifolia by phloem girdling (mean ± SD). Different letters indicate significant difference (p < 0.05). CK, FG, SG see Fig.1. Fo, initial fluorescence; Fm, maximum fluorescence; Fv, variable fluorescence; Fv/Fo, PSII potential activity; Fv/Fm, PSII maximum quantum yield; Mo, initial slope of the fluorescence induction curve.

表1 环割处理后花花柴和骆驼刺叶片主要叶绿素荧光参数的变化(平均值±标准误差)

Table 1 Changes in main chlorophyll fluorescence parameters in leaves of Karelinia caspia and Alhagi sparsifolia with girdling treatments (mean ± SE)

种 Species	参数 Parameter	处理 Treatment
种 Species	参数 Parameter	CK	PS	增幅 Amplification (%)	PF	增幅 Amplification (%)
花花柴 K. caspia	ABS/RC	2.38 ± 0.20	2.39 ± 0.20	0.48	2.64 ± 0.31^*	11.09
	ET_o/RC	1.17 ± 0.06	1.15 ± 0.09	-1.68	1.14 ± 0.08	-2.07
	TR_o/RC	1.89 ± 0.14	1.90 ± 0.14	0.44	1.97 ± 0.16	4.05
	DI_o/RC	0.49 ± 0.08	0.49 ± 0.08	0.63	0.67 ± 0.15^**	38.54
	φp_o	0.80 ± 0.02	0.80 ± 0.02	-0.06	0.75 ± 0.03^**	-6.08
	ψ_o	0.62 ± 0.04	0.60 ± 0.03	-2.36	0.58 ± 0.05^*	-5.82
	ΦE_o	0.49 ± 0.05	0.48 ± 0.04	-2.43	0.44 ± 0.05^**	-11.44
	RC/CS	717.19 ± 215.54	725.14 ± 184.65	1.11	606.83 ± 153.19	-15.39
	PI_ABS	2.93 ± 1.22	2.64 ± 0.75	-10.10	1.78 ± 0.88^**	-39.42
骆驼刺 A. sparsifolia	ABS/RC	2.89 ± 0.15	2.96 ± 0.15	2.44	3.57 ± 0.49^**	23.69
	ET_o/RC	1.18 ± 0.18	1.13 ± 0.16	-4.33	1.21 ± 0.14	2.55
	TR_o/RC	2.35 ± 0.12	2.38 ± 0.11	1.03	2.64 ± 0.11^**	12.26
	DI_o/RC	0.53 ± 0.06	0.58 ± 0.07	8.62	0.93 ± 0.29^**	73.93
	φp_o	0.81 ± 0.02	0.80 ± 0.02	-1.34	0.74 ± 0.05^**	-8.59
	ψ_o	0.50 ± 0.06	0.48 ± 0.06	-5.30	0.46 ± 0.06	-8.15
	ΦE_o	0.41 ± 0.06	0.38 ± 0.05	-6.69	0.34 ± 0.06^**	-15.91
	RC/CS	773.89 ± 38.80	750.21 ± 74.53	-3.06	585.32 ± 136.85^**	-24.37
	PI_ABS	1.64 ± 0.57	1.32 ± 0.43	-19.78	0.81 ± 0.42^**	-50.69

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短期环割对塔克拉玛干沙漠南缘两种荒漠植物的生理影响

Effects of short-term phloem girdling on physiology in two desert plants in the southern edge of the Taklimakan Desert

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