Partial mechanical impedance can increase the turgor of seedling pea roots

Roots of 3-d-old pea seedlings (Pisum sativum L.) were mechanically impeded using a sand core apparatus, which allowed mechanical impedance to be vari ed independently of aeration and water status. Turgor of root cortical cell s was then measured using a pressure probe, In seedlings grown in sand core s for 1 d, impedance had little effect on turgor, but in seedlings grown in the sand cores for 2 d, impedance increased turgor by 0.18 MPa in the apic al 6 mm.