Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 0032-079X |
EISSN | 1573-5036 |
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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