Assessment of Tolerance of Different Varieties of Hulless Barley Seedlings to Low-Temperature Stress  

作　　者：Ziao Wang Likun An Yongmei Cui Yixiong Bai Guangping Du Kunlun Wu 

机构地区：[1]Academy of Agricultural and Forestry Sciences,Qinghai University,Xining,810016,China [2]State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining,810016,China [3]Qinghai Key Laboratory of Hulless Barley Genetics and Breeding,Xining,810016,China [4]Qinghai Subcenter of National Hulless Barley Improvement,Xining,810016,China

出　　处：《Phyton-International Journal of Experimental Botany》2024年第11期2755-2766,共12页国际实验植物学杂志（英文）

基　　金：This research was supported by National Natural Science Foundation of China(NSFC)(32060423);the Open Project of State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University(2023-ZZ-01);National Natural Science Foundation of China(NSFC),Key Program of Regional Innovation and Development Joint Fund(U22A20453);Qinghai University Natural Science Foundation for Young Scholars(2022-QNY-3);Innovation Fund of Qinghai Academy of Agricultural and Forestry Sciences(2022-NKY-04).

摘　　要：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 hul-less 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.Thefinal 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-tem-perature-tolerant hulless barley resources.

关 键 词：Agronomic and physiological indicators low temperature stress qingke seedling stage 

分 类 号：Q94[生物学—植物学]