Sensitivity of a bone-equivalent polymer gel dosimeter for measuring the dose to bone during radiation therapy.

Treatment planning systems that use the Monte Carlo algorithm can calculate the dose to the medium (D) in non-water-equivalent tissues such as bones. However, D cannot be verified using actual measurements; therefore, it is necessary to develop tissue-equivalent dosimeters. In this study, we developed a bone-equivalent polymer gel dosimeter (BPGD) that can measure the dose absorbed by the bone and investigated its sensitivity.

QTL analysis for sodium removal ability in rice leaf sheaths under salinity using an IR-44595/318 F population.

Over-accumulation of salt in rice plants is an effect of salt stress which decreases growth and grain yield. Salt removal ability in leaf sheaths is a tolerance mechanism to decrease salt entry and accumulation in leaf blades and maintain photosynthesis under salinity. In this study, a QTL analysis of removal ability of sodium ions (Na) in leaf sheaths and Na accumulation-related traits, was conducted using F population between two rice varieties, IR-44595 with superior Na removal ability, and 318 with contrasting Na removal ability in leaf sheaths under salinity.

Tissue-specific expression analysis of Na and Cl transporter genes associated with salt removal ability in rice leaf sheath.

Background: A significant mechanism of salt-tolerance in rice is the ability to remove Na and Cl in the leaf sheath, which limits the entry of these toxic ions into the leaf blade. The leaf sheath removes Na mainly in the basal parts, and Cl mainly in the apical parts. These ions are unloaded from the xylem vessels in the peripheral part and sequestered into the fundamental parenchyma cells at the central part of the leaf sheath.