文献类型： 外文期刊

作者： Zhou Bei-bei ¹ ; Sun Jian ¹ ; Liu Song-zhong ¹ ; Jin Wan-mei ¹ ; Zhang Qiang ¹ ; Wei Qin-ping ¹ ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Key Lab Biol & Genet Improvement Hort Crops North, Minist Agr, Inst Forestry & Pomol, Beijing 100093, Peoples R China

关键词： dwarfing apple rootstock;SH series rootstocks;heat stress;physiological features

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2016 年 15 卷 5 期

页码：

收录情况： SCI

摘要： The aim of this study was to investigate the impact of heat stress on physiological features, together with endogenous hormones and the transcription level of related genes, to estimate the heat resistance ability and stress injury mechanism of different dwarfing apple rootstocks. Among the six rootstocks, the rootstocks of native Shao series (SH series) showed better heat stress resistance than those of Budagovski 9 (B9), Cornell-Geneva 24 (CG24), and Mailing 26 (M26) from abroad. Among SH series rootstocks, SH1 and SH6 showed higher heat stress resistance than SH40. M26 demonstrated the lowest adaption ability to heat stress, showing higher leaf conductivity and lower liquid water content (LWC) with the increase in temperature. Heat stress also resulted in the suppression of photosynthesis, which showed no significant restoration after 7-day recovery. It should be noted that although a higher temperature led to a lower LWC and photosynthetic efficiency (P-n) of CG24, there was no significant increase in leaf conductivity, and 7 days after the treatment, the P-n of CG24 recovered. The extremely high temperature tolerance of SH series rootstocks could be related to the greater osmotic adjustment (OA), which was reflected by smaller reductions in leaf relative water content (RWC) and higher turgor potentials and leaf gas exchange compared with the other rootstocks. Determination of hormones indicated multivariate regulation, and it is presumed that a relatively stable expression levels of functional genes under high-temperature stress is necessary for heat stress resistance of rootstocks.