疏叶骆驼刺母株与子株间的水分整合

doi:10.3724/SP.J.1258.2013.00017

植物生态学报 ›› 2013, Vol. 37 ›› Issue (2): 164-172.DOI: 10.3724/SP.J.1258.2013.00017

疏叶骆驼刺母株与子株间的水分整合

罗维成¹^,²^,³^,⁴^,⁵, 曾凡江¹^,²^,³^,⁴^,^*(), 刘波¹^,²^,³^,⁴^,⁵, 宋聪¹^,²^,³^,⁴^,⁵, 彭守兰¹^,²^,³^,⁴^,⁵, Stefan K. ARNDT⁶

¹中国科学院新疆生态与地理研究所, 乌鲁木齐 830011
²新疆策勒荒漠草地生态系统国家野外科学观测试验研究站, 新疆策勒 848300
³中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐 830011
⁴中国科学院荒漠与绿洲生态国家重点实验室, 乌鲁木齐 830011
⁵中国科学院大学, 北京 100049
⁶澳大利亚墨尔本大学森林与生态系统科学系, Creswick, VIC 3363, 澳大利亚

收稿日期:2012-09-24 接受日期:2012-12-20 出版日期:2013-09-24 发布日期:2013-01-31
通讯作者: 曾凡江
作者简介:* (E-mail: fjzeng369@sohu.com)
基金资助:
国家自然科学基金(31070477);国家自然科学基金(u120-3201);国家自然科学基金(31100144);国家自然科学基金(30870471);中国科学院知识创新工程重要方向项目(KZCX2-EW-316)

Water integration between mother and daughter ramet of Alhagi sparsifolia

LUO Wei-Cheng¹^,²^,³^,⁴^,⁵, ZENG Fan-Jiang¹^,²^,³^,⁴^,^*(), LIU Bo¹^,²^,³^,⁴^,⁵, SONG Cong¹^,²^,³^,⁴^,⁵, PENG Shou-Lan¹^,²^,³^,⁴^,⁵, Stefan K. ARNDT⁶

¹Xinjiang Institute of Ecology and Geography, Chinese Academic of Sciences, ürümqi 830011, China
²Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem, Cele, Xinjiang 848300, China
³Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, China
⁴State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, University of Chinese Academy of Sciences, ürümqi 830011, China
⁵Graduate University of Chinese Academy of Sciences, Beijing 100049, China
⁶Department of Forest and Ecosystem Science, University of Melbourne, Creswick, VIC 3363, Australia

Received:2012-09-24 Accepted:2012-12-20 Online:2013-09-24 Published:2013-01-31
Contact: ZENG Fan-Jiang

摘要/Abstract

摘要：

在未灌溉的土地上, 疏叶骆驼刺(Alhagi sparsifolia)通常不能进行有性繁殖, 克隆繁殖是其种群维持和延续的唯一方式。因此, 克隆性及其相关克隆性状(如水分整合)在疏叶骆驼刺自然种群的维持过程中可能扮演了极其重要的角色。该文通过疏叶骆驼刺母株和子株之间的间隔子切断和给母株补充水分的方法, 研究了母株和子株在各处理下的水势、叶形态和植株生长变化情况。结果表明: (1)间隔子切断后, 疏叶骆驼刺母株和子株正午水势均明显增大(p < 0.01), 说明间隔子切断使得母株和子株水分亏缺值都增大。(2)给母株补水后, 间隔子切断组和间隔子相连组中的母株水势均有明显增加, 同时间隔子相连组的子株水势明显增加(p < 0.01), 而间隔子切断组子株水势没有明显变化(p > 0.05)。(3)间隔子切断组的子株叶片含水率明显低于间隔子相连组子株, 而其株高、冠幅、分枝数和基径的增长量都明显小于间隔子相连组的子株(p < 0.01)。疏叶骆驼刺母株和子株间存在水分整合, 母株会通过根系向子株传输水分。研究成果对塔克拉玛干沙漠南缘的植被恢复以及水资源的合理利用有着重要的意义。

关键词: 疏叶骆驼刺, 克隆植物, 水分整合, 水势

Abstract:

Aims Alhagi sparsifolia is one of the dominant perennial species in the extreme drought region of Taklamakan Desert in northwestern China. Alhagi sparsifolia usually cannot reproduce sexually in natural, non-irrigated environments, where the only way to maintain and extend its populations is to reproduce clonally. In the natural habitats, therefore, clonality and the resultant clonal traits such as clonal integration for water (i.e., water integration) may have played great roles in maintaining populations of A. sparsifolia. So far, however, few studies have been conducted to investigate the water integration pattern between mother and daughter ramets of A. sparsifolia.
Methods We carried out an experiment with four treatments involving the spacer (i.e., the interconnection between adjacent ramets) between mother and daughter ramets. The spacer was: (1) connected, (2) severed, (3) connected and the mother ramet was supplied with 200 L additional water, and (4) severed and the mother ramet was supplied with 200 L additional water. After 15 days of spacer severance, we measured water potential of the mother and daughter ramets and their leaf morphological and growth parameters. In the water supplement treatment, we measured water potential of the mother and daughter ramets immediately before and 24 h after the water supplement. We also measured soil water content at 0 cm (soil surface) to 200 cm soil depth of the mother and daughter ramets before and after water supplement.
Important findings The difference of predawn water potential for both mother and daughter ramets was not significant (p > 0.05) between the spacer connected and spacer severed group, but the midday water potential of both mother and daughter ramets increased significantly after spacer severance (p < 0.01). After water supplement to the mothers, water potential of mothers was significantly increased in both the spacer severance and connection treatments. Water potential of daughter ramets in spacer connection treatment also increased significantly (p < 0.01), but that in spacer severance treatment did not. Leaf relative water content and the increase of height, crown width, branch number and basal diameter of the daughter ramets in spacer connection treatment were significantly higher than that in the spacer severance treatment (p < 0.01). We concluded that water integration exists between mother and daughter ramets of A. sparsifolia and the mother can transfer water to daughter ramets by spacer. This result is important for vegetation restoration and utilization of water resources of this area.

Key words: Alhagi sparsifolia, clonal plant, water integration, water potential

罗维成, 曾凡江, 刘波, 宋聪, 彭守兰, Stefan K. ARNDT. 疏叶骆驼刺母株与子株间的水分整合. 植物生态学报, 2013, 37(2): 164-172. DOI: 10.3724/SP.J.1258.2013.00017

LUO Wei-Cheng, ZENG Fan-Jiang, LIU Bo, SONG Cong, PENG Shou-Lan, Stefan K. ARNDT. Water integration between mother and daughter ramet of Alhagi sparsifolia. Chinese Journal of Plant Ecology, 2013, 37(2): 164-172. DOI: 10.3724/SP.J.1258.2013.00017

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https://www.plant-ecology.com/CN/Y2013/V37/I2/164

图/表 7

图1 实验处理设置示意图。

Fig. 1 Diagram of experimental treatments.

图2 不同处理下疏叶骆驼刺母株(A)和子株(B)的水势图(平均值±标准误差)。不同小写字母表示不同处理间差异显著(p < 0. 05)。

Fig. 2 Water potential of mother ramet (A) and daughter ramet (B) of Alhagi sparsifolia under different treatments (mean ± SE). Different lowercase letters indicate significant differences among different treatments (p < 0. 05).

图3 母株水分补充前后各处理下母株和子株土壤含水量的变化(平均值±标准误差)。A, 间隔子相连组母株。B, 间隔子相连组子株。C, 间隔子切断组母株。D, 间隔子切断组子株。

Fig. 3 Changes of soil water content of the mother and daughter ramets under different treatments before and after water supplement to mother ramet (mean ± SE). A, Mother ramet in spacer connected group. B, Daughter ramet in spacer connected group. C, Mother ramet in spacer severed group. D, Daughter ramet in spacer severed group.

图4 母株补水前后不同处理组母株水势日变化(平均值±标准误差)。A, 间隔子相连。B, 间隔子切断。

Fig. 4 Diurnal change of water potential of the mother ramet under different treatments before and after water supplement to mother ramet (mean ± SE). A, Spacer connected. B, Spacer severed.

图5 母株补水后不同处理下子株水势日变化(平均值±标准误差)。

Fig. 5 Diurnal change of water potential of the daughter ramet under different treatments after water supplement to mother ramet (mean ± SE).

表1 不同处理下疏叶骆驼刺母株和子株叶形态参数变化(平均值±标准误差)

Table 1 Variation of leaf morphological parameters of the mother and daughter ramets of Alhagi sparsifolia under different treatments (mean ± SE)

叶形态参数 Leaf morphological parameter	母株 Mother ramet		子株 Daughter ramet
叶形态参数 Leaf morphological parameter	间隔子切断 Spacer severed	间隔子相连 Spacer connected	间隔子切断 Spacer severed	间隔子相连 Spacer connected
叶片含水率 Leaf water content (%)	3.415 ± 0.102^a	2.900 ± 0.231^b	1.137 ± 0.072^c	3.100 ± 0.131^b
比叶面积 SLA (cm²·g^-1)	79.259 ± 9.496^a	77.069 ± 3.591^a	73.574 ± 4.033^b	74.001 ± 3.384^b
比叶鲜重 LMA·fw (cm²·g^-1)	17.939 ± 1.950^a	19.872 ± 1.938^a	18.834 ± 1.103^a	18.471 ± 0.988^a

表2 不同处理下疏叶骆驼刺母株和子株生长指标变化(平均值±标准误差)

Table 2 Variation of growth parameters of the mother and daughter ramets of Alhagi sparsifolia under different treatments (mean ± SE)

生长参数 Growth parameter	母株 Mother ramet		子株 Daughter ramet
生长参数 Growth parameter	间隔子相连 Spacer connected	间隔子切断 Spacer severed	间隔子相连 Spacer connected	间隔子切断 Spacer severed
株高变化 Change of height (cm)	14.200 ± 2.262^a	13.266 ± 2.283^a	11.545 ± 2.506^a	5.891 ± 3.033^b
冠幅变化 Change of crown width (cm²)	4 469.343 ± 366.715^a	4 003.861 ± 458.227^a	2 084.121 ± 349.652^b	1 249.861 ± 299.347^c
分枝数变化(个) Change of branch number (No.)	120.586 ± 15.339^a	112.563 ± 18.206^a	43.668 ± 11.295^b	22.963 ± 17.068^c
基径变化 Change of basal diameter (cm)	0.310 ± 0.033^a	0.289 ± 0.029^a	0.220 ± 0.040^b	0.117 ± 0.019^c

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疏叶骆驼刺母株与子株间的水分整合

Water integration between mother and daughter ramet of Alhagi sparsifolia

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