Effects of low temperature on the physiological indexes of cold resistance of two colorful Hosta

doi:10.14088/j.cnki.issn0439-8114.2022.01.022

Abstract

Abstract: In order to enrich the types of ground cover plants in northern Shaanxi and study the cold resistance of the introduced new types of colorful Hosta, the roots of Hosta ‘aureomarginata’and Hosta ‘albomarginata’ were used as experimental materials to analyze the physiological indexes of soluble sugar, free proline, MAD, SOD and POD activity under the eight artificial low temperature stress gradients from 0 ℃ to -35 ℃. The results showed that as the treatment temperature decreased, all indexes showed an overall trend of increasing firstly, then decreased, but the increase range and the peak temperature were different. The contents of SS, Pro and SOD, POD activity in Hosta ‘aureomarginata’ is higher than that of Hosta‘albomarginata’, but MDA content is lower. Combined with the field observation results of four years introduction, the comprehensive analysis showed that two cultivars of Hosta showed strong cold resistance, and the cold resistance of Hosta ‘aureomarginata’ is relatively stronger.

Key words: Hosta, low temperature stress, cold resistance, physiological indexes

CLC Number:

S682.1⁺9

ZHAO Huan-rui, WANG Ai-wen, LIU Juan, LUO Cai-yun, WANG Xiao-rong. Effects of low temperature on the physiological indexes of cold resistance of two colorful Hosta[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(1): 115-118.

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