Potassium induced salinity tolerance in wheat (Triticum aestivum L.)

Abstract

Water culture experiments were conducted to study the response of ten wheat genotypes to external K application (10 mmol KCI dm _ 3 ) at seedling stage under saline condition (0 and 100 mmol NaCl dm _ 3 ). The data showed that there was an increase in the shoot and root length with the application of external K. The increase was more pronounced under control than under saline conditions. The better performing genotypes under two treatments were Bhitai, NIAB-41, NIAB-I076 and Khirman. The enhanced growth of these genotypes under saline condition might be due to the quick response to external K application, resulting in high K/Na ratio. The results indicated that the genotypes, which have the ability of enhanced K/Na discrimination, might perform better under saline conditions when sufficient potassium is applied in the rooting medium.

Potassium induces positive changes in nitrogen metabolism and antioxidant system of oat (Avena sativaL cultivar Kent)

“…Singh et al (2000) and Jatav et al (2012) have also found better growth and yield of wheat crop with the addition of potassium. Increase in root and shoot length as a result of application of potassium has been earlier reported in Triticum aestivum L. by Shirazi et al (2005) also. KNO 3 induced increase in fresh and dry weight has earlier been reported in sunflower (Helianthus annuus L.) and safflower (Carthamus tinctorius L.) by Jabeen and Ahmad (2011) as well.…”

III.Heat stress in Triticum: kinetics of Na, K and P accumulation

“…C and HS refer to control and heat stress treatments, respectively. In our study, as reported by Bergmann (1992), at booting, the contents of K in the shoots varied between 26-53 mg/g (Table 3), eventually displaying a close interaction with Na (Shirazi et al, 2005). It was also found that, as a general pattern, the concentrations of K in the control genotypes, decreased during the growth cycle in all tissues.…”

Nitrogen, Phosphorus, and Potassium Availability in Manure- and Sewage Sludge–Applied Soil

“…Electrical conductivity at SS-3 was significantly greater than the control in the first year and SS-2 and SS-3 were greater than the control in the second year. However, added salinity with sewage sludge and manure was not anywhere near the 7 mS cm −1 threshold for wheat (e.g., as reported by Shirazi et al 2005). Soil organic-matter content increased significantly with added sewage sludge (at SS-2, 40 Mg ha −1 , and SS-3, 60 Mg ha −1 ) compared to the control from the first year.…”