Uncovering root compaction response mechanisms: new insights and opportunities.
Uncovering root compaction response mechanisms: new insights and opportunities.
复制标题
揭示根系压实反应机制：新的见解和机会。
DOI：
10.1093/jxb/erad389
复制
发表时间：
2024-01-10
影响因子：
6.9
通讯作者：
Bennett, Malcolm J.
中科院分区：
文献类型：
--
作者：
Pandey, Bipin K.;Bennett, Malcolm J.
压实破坏了土壤结构，减少了根的生长、养分和水分的吸收、气体交换和微生物的生长。土壤压实抑制根系生长最初被认为反映了机械阻抗和水分有效性降低的影响。然而，最近的研究表明，通过使用激素乙烯的一种基于气体扩散的新机制，植物根可以感知土壤的紧实度。未压实的土壤具有高度相互连接的孔隙空间，有利于根尖释放的乙烯等气体的扩散。相反，土壤压实压力会破坏气孔网络，导致乙烯在根尖周围积累，并引发生长停滞。从基因上干扰乙烯信号会导致根对压实压力变得不那么敏感。这些对分子传感机制和新出现的根系解剖特征的新理解为通过靶向关键基因及其信号通路培育抗土壤压实作物提供了新的机会。这一专家观点讨论了这些最新的进展和与根-土壤紧实反应相关的分子机制。对控制模式植物根部土壤紧实反应的新的分子和细胞机制的新见解为选择更具弹性的作物提供了转化机会。
Compaction disrupts soil structure, reducing root growth, nutrient and water uptake, gas exchange, and microbial growth. Root growth inhibition by soil compaction was originally thought to reflect the impact of mechanical impedance and reduced water availability. However, using a novel gas diffusion-based mechanism employing the hormone ethylene, recent research has revealed that plant roots sense soil compaction. Non-compacted soil features highly interconnected pore spaces that facilitate diffusion of gases such as ethylene which are released by root tips. In contrast, soil compaction stress disrupts the pore network, causing ethylene to accumulate around root tips and trigger growth arrest. Genetically disrupting ethylene signalling causes roots to become much less sensitive to compaction stress. Such new understanding about the molecular sensing mechanism and emerging root anatomical traits provides novel opportunities to develop crops resistant to soil compaction by targeting key genes and their signalling pathways. This expert view discusses these recent advances and the molecular mechanisms associated with root–soil compaction responses. New insights into novel molecular and cellular mechanisms that control soil compaction responses in model plant roots provide translational opportunities to select more resilient crops.
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DOI：
10.1073/pnas.2201072119
发表时间：
2022-07-26
影响因子：
11.1
作者：
通讯作者：
--
影响因子：
9.4
作者：
Iijima, M;Griffiths, B;Bengough, AG
通讯作者：
Bengough, AG
影响因子：
7.4
作者：
Colombi, Tino;Kirchgessner, Norbert;Keller, Thomas
通讯作者：
Keller, Thomas
影响因子：
6.9
作者：
Chimungu JG;Loades KW;Lynch JP
通讯作者：
Lynch JP
影响因子：
4.9
作者：
Clark, LJ;Whalley, WR;Barraclough, PB
通讯作者：
Barraclough, PB