Open Access

ARTICLE

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

Ziao Wang^1,3,4,#, Likun An^1,3,4,#, Yongmei Cui^1,2,3,4, Yixiong Bai^1,3,4, Guangping Du¹, Kunlun Wu^1,2,3,4,*

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

* Corresponding Author: Kunlun Wu. Email:
# These authors have contributed equally to this study

Phyton-International Journal of Experimental Botany 2024, 93(11), 2755-2766. https://doi.org/10.32604/phyton.2024.055852

Received 08 July 2024; Accepted 09 October 2024; Issue published 30 November 2024

Abstract

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.

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Keywords

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Supplementary Material

Supplementary Material File

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