TaRZ2 confers freezing tolerance in <i>Arabidopsis</i> plants.

Abstract

<p>(A) For non cold-acclimated (NA) freezing tolerance tests, 4-week-old plants of the wild-type (WT) and TaRZ2-expressing plants (OX21, OX22, and OX23) were subjected to freezing shock at −6 for 3–6 h directly under continuous light, then transferred to normal growth conditions. (B) For cold-acclimated (CA) freezing tolerance test, 4-week-old plants were first placed at 4°C for 1 day, −1°C for 1 day, and then subjected to freezing shock at −7 for 12–25 h. Surviving plants were counted 7 days after transferring to normal growth conditions. One representative picture among repeated experiments was shown. (C) For electrolyte leakage test, leaves from the NA wild-type and TaRZ2-expresing plants were frozen at −1 to −10°C, and the extent of cellular damage was estimated by measuring electrolyte leakage.</p