Changes in root system structure, leaf water potential and gas exchange of maize and triticale seedlings affected by soil compaction

摘要: Abstract The physiological reasons associated with differential sensitivity of C3 and C4 plant species to soil compaction stress are not well explained understood. responses growth characteristics, changes in leaf water potential gas exchange maize triticale a different were investigated. In the present study seedlings maize, representative plants subjected low (L – 1.10 g cm−3), moderate (M 1.34 g cm−3) severe (S 1.58 g cm−3) level. Distinct differences distribution roots profile observed. Plants treatments M or S comparison treatment L, showed decrease number, dry mass stem, leaves roots, an increase shoot root ratio. A drastic biomass on depth from 15 40 cm was Any level did influence number seminal seminal-adventitious but decreased their length. total length nodal compaction. Changes traits L greater for than accompanied by daily (ψ) parameters (PN, E, gs). Differences between ψ most cases statistically insignificant, whereas triticale, they significant. found PN, E gs particular measurements taken at 12:00 16:00. highest correlation coefficients obtained relationship stomatal conductance, both which indicates close association stomata behavior status.