The Combined Effects of Salinity and Root Anoxia on Growth and Net Na+ and K+-accumulation in Zea mays Grown in Solution Culture

Growth, Water Relations, and Accumulation of Organic and Inorganic Solutes in Roots of Maize Seedlings during Salt Stress

“…The present work reveals the remarkable ability of maize roots to continue extension when gradually exposed to increasing concentrations of NaC1, and to resume extension during salt shock, even at concentrations (100 mM and greater) that eventually prove very injurious to leaves of intact, transpiring plants as salts accumulate in them (Drew et al, 1988). Roots of dark-grown cotton seedlings that had acclimated to 150 mM NaCl were also highly tolerant, extending at 60 to 80% of the rate of unsalinized controls (Zhong and Lauchli, 1994).…”

Interactive Effects of Drought Stress and Phytohormones or Polyamines on Growth and Yield of Two M(<i>Zea maize</i> L) Genotypes

“…This was found to be linked with the efficiency of photosynthesis apparatus and consequently the production of photoassimilates in the two maize genotypes. [43,44] reported that, the reduction in leaves area by drought stress may be due to a reduction in leaf expansion, probably due to the effect of drought stress on cell division or cell expansion or both. [45] reported that, the reduction observed in the leaf area and dry weight of the drought stressed plants can be attributed to the changes in plant water relations under drought stress which cause a reduction in meristem activity as well as cell elongation [46], thereby inhibiting leaf expansion [47].…”

Growth and ion relations in response to combined salinity and waterlogging in the perennial forage legumes Lotus corniculatus and Lotus tenuis

“…Interestingly, L. corniculatus had 25-85% higher K + concentrations than L. tenuis in the individual leaflets, despite no significant difference between the species in whole shoot or stem K + concentrations. waterlogging, for example wheat (Akhtar et al 1994; Barrett-Lennard et al 1999), maize (Drew et al 1988), subterranean clover (Rogers and West 1993), Banksia attenuata (Carter et al 2006) and Eucalyptus globulus (Marcar 1993). The ability to 'exclude' toxic ions is likely to be correlated with salt tolerance (e.g., Tester and Davenport 2003).…”

“…For many plant species, when salinity and waterlogging occur together, a large increase in Na + and/or Cl -concentrations in shoots occurs due to increased entry of these ions into oxygendeficient roots ( Barrett-Lennard 2003). Thus, waterlogging can exacerbate the effects of salinity (e.g., maize, Drew et al 1988). Revegetation of saline and waterlogged soils requires plant species that can tolerate soil oxygen deficiency, or more accurately avoid severe hypoxia by forming aerenchyma to enhance internal oxygen transport, and regulate the transport of Na + and Cl -to avoid ion toxicity in shoot tissues.…”

“…Revegetation of saline and waterlogged soils requires plant species that can tolerate soil oxygen deficiency, or more accurately avoid severe hypoxia by forming aerenchyma to enhance internal oxygen transport, and regulate the transport of Na + and Cl -to avoid ion toxicity in shoot tissues. This combination of traits does exist in the plant kingdom; for example, in salt marsh species (Drew et al 1988).…”