Journal
PLANTS-BASEL
Volume 9, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/plants9040507
Keywords
Spinacia oleraceae; Na+ :K+ relation; Cl-:NO3- relation; salinity-driven mineral imbalance; salt-tolerant glycophyte
Categories
Funding
- United States Department of Agriculture (USDA-ARS) [CRIS 2036-13210-006-00D]
- Enhancing Special Crop Tolerance to Saline Irrigation Waters
Ask authors/readers for more resources
Two spinach (Spinacea oleracea L.) cultivars were evaluated for their response to deficient (0.25 mmol(c) L-1 or 0.25 K) and sufficient (5.0 mmol(c) L-1 or 5.0 K) potassium (K) levels combined with salinities of 5, 30, 60, 90, and 120 mmol(c) L-1 NaCl. Plants substituted K for Na proportionally with salinity within each K dose. Plants favored K+ over Na+, regardless of salinity, accumulating significantly less Na at 5.0 K than at 0.25 K. Salinity had no effect on N, P, and K shoot accumulation, suggesting that spinach plants can maintain NPK homeostasis even at low soil K. Ca and Mg decreased with salinity, but plants showed no deficiency. There was no Na+ to K+ or Cl to NO3 competition, and shoot biomass decrease was attributed to excessive NaCl accumulation. Overall, 'Raccoon' and 'Gazelle' biomasses were similar regardless of K dose but 'Raccoon' outproduced 'Gazelle' at 5.0 K at the two highest salinity levels, indicating that 'Raccoon' may outperform 'Gazelle' at higher NaCl concentrations. At low K, Na may be required by 'Raccoon', but not 'Gazelle'. This study suggested that spinach can be cultivated with recycled waters of moderate salinity, and less potassium than recommended, leading to savings on crop input and decreasing crop environmental footprint.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available