Mineral nutrient transport by sunflower seedlings grown under saline conditions (NaCl)

Abstract

Sunflower seeds (Helianthus annuus L., cv. Dwarf) were grown with distilled water only or increasingly saline solutions (NaCl) to determine the influence of salinity on seedling growth and on the distribution of mineral nutrients obtained exclusively from cotyledons. Seedling growth was decreased by moderate (50mM) and high (l00mM) concentrations of NaCl in the growth solution. Salinity generally decreased mineral transport (especially Fe, Mn, Mg, and Ca) from seed to seedling, except for K. Transport of Fe, Mg, and Ca to the aerial part was also markedly reduced.

Effects of NaCl and silicon on ion distribution in the roots, shoots and leaves of two alfalfa cultivars with different salt tolerance

“…2000). In addition to this, Sanchez‐Raya and Delgado (1996) reported that salinity reduced the Fe 3+ and Mn 2+ contents in sunflower seedlings.…”

Response of eight Cucumis melo cultivars to salinity during germination and early vegetative growth

“…In our experiments, the saline stress reduced the Ca 2+ and Mg 2+ concentrations only in the shoots, while in the roots they remained constant. This effect has been reported in other species such as Helianthus annuus [28] or Solanum melongena [29]. Lynch and Läuchli [16] proposed that the decrease in the concentration of these cations in the shoots may be related to the reduced Ca 2+ release into the root xylem, possibly by affecting the cation active loading in the xylem vessels.…”

Calcium effects on changes in chlorophyll contents, dry weight and micronutrients of strawberry (Fragaria ×ananassaDuch.) plants under salt-stress conditions

“…In the same way, concentrations of Fe, Mn and Zn in leaves of zucchini were increased by intensifying the salt stress; however, the concentration of Cu was reduced [10]. Moreover, Sanchez-Raya and Delgado suggested that salinity generally decreased Fe and Mn transportation from seed to seedling in the growth period in sunflower plants [11]. They also reported that transportation of Fe to aerial parts was distinctly reduced.…”