Plant roots sense soil compaction through restricted ethylene diffusion

  title={Plant roots sense soil compaction through restricted ethylene diffusion},
  author={Bipin K. Pandey and Guoqiang Huang and Rahul Bhosale and Sjon Hartman and Craig J. Sturrock and Lottie Jose and Olivier C. Martin and Michal Kar{\'a}dy and Laurentius A.C.J. Voesenek and Karin Ljung and Jonathan Paul Lynch and Kathleen M. Brown and William Richard Whalley and Sacha J. Mooney and Dabing Zhang and Malcolm J. Bennett},
  pages={276 - 280}
Ethylene aplenty signals soil compaction It's tough to drive a spade through compacted soil, and plant roots seem to have the same problem when growing in compacted ground. Pandey et al. found that the problem is not, however, one of physical resistance but rather inhibition of growth through a signaling pathway. The volatile plant hormone ethylene will diffuse through aerated soil, but compacted soil reduces such diffusion, increasing the concentration of ethylene near root tissues. The… 
Ethylene inhibits rice root elongation in compacted soil via ABA- and auxin-mediated mechanisms
Significance Intensive agriculture and changing tillage practices are causing soils to become increasingly compacted. Hard soils cause roots to accumulate the hormone ethylene, triggering reduced
Soil penetration by maize roots is negatively related to ethylene‐induced thickening
It is suggested that prolonged exposure to ethylene could function as a stop signal for axial root growth and is proposed that ethylene insensitive roots, i.e. those that do not thicken and are able to overcome impedance, have a competitive advantage under mechanically impeded conditions as they can maintain their elongation rates.
RUSSELL REVIEW Are plant roots only “in” soil or are they “of” it? Roots, soil formation and function
Roots are near‐ubiquitous components of soils globally but have often been regarded as separate from the soil rather than a substantial factor in determining what soil is and how it functions. The
Root plasticity under abiotic stress
Insight is provided into recent discoveries showing the importance of root system architecture and plasticity for the survival and development of plants under heat, cold, drought, salt, and flooding stress and the cellular mechanisms behind these different root tropisms.
Plant root development: is the classical theory for auxin-regulated root growth false?
A new root growth regulatory model is proposed, in which it is not IAA, but IAA-triggered ethylene which plays the cardinal regulatory role - taking effect, or not - depending on the external circumstances.
Future roots for future soils
It is argued that a 'whole plant in whole soil' perspective will be useful in guiding the development of future crops for future soils in the face of diverging trajectories of soils under Conservation Agriculture and low-input agroecosystems.