Arid
DOI10.1007/s11104-014-2361-9
Hydrotropism in lateral but not in pivotal roots of desert plant species under simulated natural conditions
Guevara, Aranzazu; Valeria Giordano, Carla
通讯作者Valeria Giordano, Carla
来源期刊PLANT AND SOIL
ISSN0032-079X
EISSN1573-5036
出版年2015
卷号389期号:1-2页码:257-272
英文摘要

Root hydrotropism has been widely studied in seedling radicles through artificial experiments that reduce the influence of gravity and soil. In this work we aimed to study hydrotropism of primary lateral and pivotal roots in developed root systems of desert plants under simulated natural conditions.


We grew Bulnesia retama Griseb. (non phreatophyte), Prosopis flexuosa DC. (facultative phreatophyte) and Prosopis alpataco Phil.(obligate phreatophyte) seedlings in observation boxes with sand. Lateral and pivotal roots were stimulated by lateral water gradients and hydrotropic responses, root proliferation and root : shoot ratios were measured.


We found that 65 +/- 15 % of lateral roots that grew in response to water gradients in B. retama, 84 +/- 8 % in P. flexuosa and 88 +/- 8 % in P. alpataco displayed hydrotropism. Conversely, pivotal roots did not show hydrotropic growth. This was accompanied by root proliferation inside water patches, and biomass partitioning to shoot growth.


Our results provide evidence that root hydrotropism is a relevant response that could occur in nature. Lateral and pivotal roots manifest different hydrotropic responses under the conditions assayed. The combination of hydrotropism and precise root proliferation can shape root architecture, leading to optimum water patch exploration.


英文关键词Bulnesia retama Hydrotropism Prosopis alpataco Prosopis flexuosa Root proliferation R : Sratio
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000352153600019
WOS关键词ARABIDOPSIS-THALIANA ; ABSCISIC-ACID ; ARCHITECTURE ; ACQUISITION ; GROWTH ; LIGHT ; WATER
WOS类目Agronomy ; Plant Sciences ; Soil Science
WOS研究方向Agriculture ; Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189635
作者单位Consejo Nacl Invest Cient & Tecn CCT Mendoza CONI, IADIZA, RA-5500 Mendoza, Argentina
推荐引用方式
GB/T 7714
Guevara, Aranzazu,Valeria Giordano, Carla. Hydrotropism in lateral but not in pivotal roots of desert plant species under simulated natural conditions[J],2015,389(1-2):257-272.
APA Guevara, Aranzazu,&Valeria Giordano, Carla.(2015).Hydrotropism in lateral but not in pivotal roots of desert plant species under simulated natural conditions.PLANT AND SOIL,389(1-2),257-272.
MLA Guevara, Aranzazu,et al."Hydrotropism in lateral but not in pivotal roots of desert plant species under simulated natural conditions".PLANT AND SOIL 389.1-2(2015):257-272.
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