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[Cold-tolerance of walnut cultivars: a comprehensive evaluation]
Kun Xiang1, Mei-yong Zhang, Ying Xu
1Shandong Institute of Pomology, Taian 271000, Shandong, China. xiangkun0534@tom.com
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|December 1, 2011
Summary
Researchers evaluated walnut cold resistance by exposing six cultivars to sub-zero temperatures. N17-24 and Luguo No. 12 showed superior cold tolerance and recovery, indicating potential for improved cultivation.
Area of Science:
- Plant physiology
- Horticulture
- Breeding science
Context:
- Walnut cultivation expansion requires enhanced cold tolerance.
- Assessing cultivar responses to freezing stress is crucial for breeding programs.
Purpose:
- To evaluate the cold resistance of six walnut cultivars (lines) under freezing conditions.
- To identify key physiological indicators of cold stress in walnut.
Summary:
- Six walnut cultivars were subjected to temperatures ranging from -15°C to -35°C.
- Physiological parameters including water content, membrane permeability, lipid peroxidation, protective enzyme activities (superoxide dismutase, catalase), and osmotic adjustment substances (soluble protein, proline) were measured.
- Cold resistance was ranked using fuzzy mathematics, with N17-24 and Luguo No. 12 demonstrating the highest tolerance and recovery rates.
Impact:
- Identifies superior cold-tolerant walnut cultivars (N17-24, Luguo No. 12) for breeding programs.
- Provides insights into physiological mechanisms of cold tolerance in walnuts.
- Supports the expansion of walnut cultivation into colder regions.
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