Patterns of root architecture adaptation of a phreatophytic perennial desert plant in a hyperarid desert
Patterns of root architecture adaptation of a phreatophytic perennial desert plant in a hyperarid desert
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极度干旱沙漠中水生多年生沙漠植物的根系结构适应模式
DOI：
10.1016/j.sajb.2013.02.003
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发表时间：
2013-05-01
影响因子：
3.1
通讯作者：
Song, C.
中科院分区：
文献类型：
--
作者：
Liu, B.;Zeng, F. -J.;Song, C.
植物根系可以通过改变其根构型的三维部署来响应养分的有效性和分布。为探讨塔克拉玛干沙漠绿洲植被对极端干旱环境的适应性，对一种多年生地下水植物的根构型进行了研究。本文以多年生豆科植物骆驼刺Alhagi sparsifolia Shap.在2007 - 2009年的每个生长季结束时，对具有完整根系的10株水稻进行了挖掘，并对根系的构型、地上和地下生物量、根冠比、根系深度、种子产量和分株数量进行了分析。相对于地上部干重，主根深度随着水分供应的增加而降低。我们检验了（1）灌溉增加根系生物量和分株数量的假设，（2）灌溉增加根系生物量和分株数量的假设。疏叶形成了一个有效的根系结构，可以吸收土壤水分和营养。(C)2013款萨博。Elsevier B. V.出版，保留所有权利。
Plant root systems can respond to nutrient availability and distribution by changing the three-dimensional deployment of their root architecture. The year after year variation of root architecture was investigated in a perennial phreatophyte in the controlled condition vegetation situated in the oasis in the Chinese Taklamakan desert with the goal to elucidate their adaptation to hyperarid environment. The whole plants of an indigenous perennial legume Alhagi sparsifolia Shap. with intact root systems were excavated at the end of each growing season from 2007 to 2009 and analyzed for architecture, above and belowground biomass, root/shoot ratio, root depth, seed yields and ramet Changes in water availability were found to have stupendous effects on taproot depth, lateral root length and ramet quantity. Relative to shoot dry weight, taproot depth decreased with increasing water availability. In contrast, lateral root elongation was promoted by higher water availability.We tested the hypothesis that (1) irrigation increases root biomass and the quantity of ramets, and (2) A. sparsifolia Shap. develops an efficient root architecture that could absorb soil water and nutrition. (C) 2013 SAAB. Published by Elsevier B.V. All rights reserved.