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Journal of Integrative Agriculture  2016, Vol. 15 Issue (05): 1025-1033    DOI: 10.1016/S2095-3119(15)61298-9
Physiology·Biochemistry·Cultivation·Tillage Advanced Online Publication | Current Issue | Archive | Adv Search |
Dwarfing apple rootstock responses to elevated temperatures: A study on plant physiological features and transcription level of related genes
ZHOU Bei-bei, SUN Jian, LIU Song-zhong, JIN Wan-mei, ZHANG Qiang, WEI Qin-ping
Institute of Forestry & Pomology, Beijing Academy of Agriculture & Forestry Sciences/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (North China), Ministry of Agriculture, Beijing 100093, P.R.China
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Abstract    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 dwarfig 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 Malling 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 signifiant restoration after 7-day recovery. It should be noted that although a higher temperature led to a lower LWC and photosynthetic effiiency (Pn ) of CG24, there was no signifiant increase in leaf conductivity, and 7 days after the treatment, the Pn of CG24 recovered. The extremely high temperature tolerance of SH series rootstocks could be related to the greater osmotic adjustment (OA), which was reflcted 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
Keywords:  dwarfig apple rootstock       SH series rootstocks        heat stress        physiological features  
Received: 02 September 2015   Accepted:

This study was conducted with the support of the Special Fund for the China Agriculture Research System (CARS-28) and the Special Fund for the Construction of Scientific and Technological Innovation Capability, China (KJXC20140406).

Corresponding Authors:  WEI Qin-ping, Tel: +86-10-82598036, E-mail:    
About author:  ZHOU Bei-bei, E-mail:

Cite this article: 

ZHOU Bei-bei, SUN Jian, LIU Song-zhong, JIN Wan-mei, ZHANG Qiang, WEI Qin-ping. 2016. Dwarfing apple rootstock responses to elevated temperatures: A study on plant physiological features and transcription level of related genes. Journal of Integrative Agriculture, 15(05): 1025-1033.

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