Morphological plasticity and phosphorus uptake mechanisms of hybrid Eucalyptus roots under spatially heterogeneous phosphorus stress
Morphological plasticity and phosphorus uptake mechanisms of hybrid Eucalyptus roots under spatially heterogeneous phosphorus stress
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空间异质磷胁迫下杂种桉树根系形态可塑性及吸磷机制
DOI：
10.1007/s11676-016-0335-x
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发表时间：
2017-07
影响因子：
3
通讯作者：
Cai Liping
中科院分区：
文献类型：
--
作者：
Zhou Chuifan;Jiang Wuya;Li Ying;Hou Xiaolong;Liu Aiqin;Cai Liping
本研究对我国南方目前栽培的8个桉树杂交品种的根系进行异质磷胁迫，为筛选高磷效率桉树品种提供科学依据。当比较这些杂种在不同实验条件下（均质或异质供磷与不供磷）对磷的定位能力时，当磷供应从不供磷或异质磷（供磷的一半）增加时，桉树的主要生长特性，如株高、直径、干质量和磷含量显着提高。 磷量）至均质磷。在这三种条件下，不同桉树杂交种的生长性状差异显着，表明杂交种对不同磷条件的适应性不同。不同磷条件下桉树地上组织的生长性状很大程度上受地下根系形态的影响。此外，异质磷处理下桉树的根系形态表明存在两种养分定位机制。桉树杂交种如 Urophylla 3229、Grandis 9、Guanglin 3、201-2 和 Dunn 在靠近磷供应的地方产生更多的根；其他杂交种尾叶3216、格兰迪5号和广林9号则主要依靠与磷供应相反的根部生长来获取足够的养分生长。通过这两种策略，获得了更广泛的养分，根系分布更大，覆盖了更多的土壤体积，增加了根系与土壤磷的接触面积，增加了根系对磷的吸收。这些结果表明，桉树依靠根系形态特征的变化来增加磷资源的可利用性。
In this study, we subjected the root systems of eight Eucalyptus hybrids currently cultivated in southern China to heterogeneous phosphorus stress to provide a scientific basis for the selection of a highly phosphorus-efficient Eucalyptus variety. When the ability of these hybrids to locate phosphorus under different experimental conditions (phosphorus supply in a homogeneous or heterogeneous manner vs. no phosphorus supply) was compared, the main growth characteristics of Eucalyptus, such as plant height, diameter, dry mass, and phosphorus content, significantly improved when the phosphorus supply was increased from no phosphorus or heterogeneous phosphorus (half of the phosphorus amount) to homogeneous phosphorus. Across these three conditions, the growth traits of different Eucalyptus hybrids differed significantly, indicating different adaptabilities of the hybrids to various phosphorus conditions. The growth traits of the aboveground tissues of Eucalyptus under different phosphorus conditions were largely influenced by the morphology of the underground root system. In addition, the root morphology of Eucalyptus under heterogeneous phosphorus treatment suggested that there were two mechanisms for locating nutrients. Eucalyptus hybrids such as Urophylla 3229, Grandis 9, Guanglin 3, 201-2, and Dunn produced more roots proximal to the phosphorus supply; the other hybrids, Urophylla 3216, Grandis 5, and Guanglin 9, relied mainly on the growth of roots opposite the phosphorus supply to obtain adequate nutrients for growth. With these two strategies, a wide range of nutrients was obtained, root distribution was greater, more soil volume was covered, the contact area of the roots with soil phosphorus was increased, and the uptake of phosphorus by the root system was increased. These results demonstrate that Eucalyptus relies on changes to morphological characteristics of the root system to increase accessibility to phosphorus resources.
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影响因子：
3.7
作者：
T. Grove
通讯作者：
T. Grove
影响因子：
9.4
作者：
Hodge, A;Stewart, J;Fitter, AH
通讯作者：
Fitter, AH
比较蛋白质组分析为玉米叶片低磷胁迫反应提供新见解
影响因子：
3.7
作者：
Zhang K;Liu H;Tao P;Chen H
通讯作者：
Chen H
影响因子：
2.1
作者：
C. M. Borkert;S. A. Barber
通讯作者：
C. M. Borkert;S. A. Barber
DOI：
10.1016/j.plaphy.2014.05.006
发表时间：
2014-09
期刊：
Plant physiology and biochemistry : PPB
影响因子：
--
作者：
M. T. Oliveira;C. D. Medeiros;Gabriella Frosi;M. Santos
通讯作者：
M. T. Oliveira;C. D. Medeiros;Gabriella Frosi;M. Santos