TY  - EJOU
AU  - Wang, Ziao 
AU  - An, Likun 
AU  - Cui, Yongmei 
AU  - Bai, Yixiong 
AU  - Du, Guangping 
AU  - Wu, Kunlun 

TI  - Assessment of Tolerance of Different Varieties of Hulless Barley Seedlings to Low-Temperature Stress
T2  - Phyton-International Journal of Experimental Botany

PY  - 2024
VL  - 93
IS  - 11
SN  - 1851-5657

AB  - In this study, we analyzed the agronomic and physiological indicators of the leaves and roots of 60 hulless barley varieties under low-temperature treatment, identified the crucial indicators that can reflect the ability of hulless barley to tolerate low-temperature, and evaluated the ability of different hulless barley varieties to tolerate low-temperature. The results indicated significant differences in the agronomic and physiological indicators of 60 hulless barley varieties subjected to low-temperature treatment. Most of the agronomic indicators significantly decreased, whereas most of the physiological indicators significantly increased. However, the magnitude of changes in each agronomic and physiological indicator differed among the varieties. A comprehensive analysis of the agronomic and physiological indicators revealed that the antioxidant enzyme activity, soluble sugar (SSC) and free proline (FPRO) could be used as a crucial indicator to evaluate the low-temperature tolerance of hulless barley. Compared with those of agronomic indicators, the physiological indicators of the hulless variety barley better reflected its resistance to low-temperature stress. The final comprehensive evaluation showed that Himalaya 22 was the most tolerant to low-temperature, whereas Changmanglan qingke was the most sensitive to low-temperature. In this study, we assessed various agronomic and physiological indicators of hulless barley plants under low-temperature stress. We also identified essential agronomic and physiological indicators for screening low-temperature-tolerant varieties. The research results thus provide a reference for screening low-temperature-tolerant hulless barley resources.
KW  - Agronomic and physiological indicators; low temperature stress; qingke; seedling stage

DO  - 10.32604/phyton.2024.055852