引起核桃种子休眠的主要因素及其休眠类型
The Main Factors Inducing the Walnut(Juglans regia L.) Seed Dormancy and the Types of Dormancy
摘要
Abstract
[Objective] This project aims to reveal the causes and types of walnut seed dormancy.The present research was carried out to investigate causal factors of the walnut seed dormancy and types.[Method] The walnut seeds were treated sand stratification in short period of moist low temperature sand stratification,soaked in external gibberellic acid (GA3),water soak treatment and water soak treatment with sunlight exposure treatment to observes seed germination percentage,germination index,germination potential.After that,the water soluble germination inhibitor in walnut seed shell was extracted and detected by bioassay.and bioassay of walnut endocarp soaking solution.[Result]The results showed that both moist low temperature in short period of sand stratification and GA3 treatment did not show any significant difference compared with CK (|U|≤1.96).Both soaked (15 days) and additional sun exposure for 2h after soaking (15 days) increased the percentage of seed germination,germination index as well as the germination potential with a significant differences compared with CK (|U|≥2.58);The bioassay experiment showed that walnut endocarp contained certain amount of soluble germination inhibitory substance,compared with the control,and at the level of 1.5 g/ml (dry weight) concentration,the germination rate,root and shoot growth rate of wheat seeds were 26％,6％ and 5％ of those of CK,respectively.[Conclusion] Comprehensive analysis showed that,the ratio of en dogenous GA3/ABA in walnut seeds might regulate its dormancy,and water soluble inhibitory substances with the mechanical hindrance of seed shell are the dominant factors to regulate dormancy.In conclusion,the project confirms that the dormancy of walnut seeds belongs to physiological dormancy type and mechanical obstacle dormancy type.关键词
核桃种子/打破休眠/抑制物质/ABA/休眠类型Key words
walnut seeds/dormancy breaking/inhibitory substance/ABA/dormancy type分类
农业科技引用本文复制引用
阿卜杜许库尔·牙合甫,古丽尼沙·沙依明尼亚孜,海利力·库尔班,吐逊古丽·托乎提,何丹,加帕尔·卡迪尔..引起核桃种子休眠的主要因素及其休眠类型[J].新疆农业科学,2017,54(12):2218-2226,9.基金项目
自治区法人科技特派员服务县市项目“核桃高接改优及标准化管理技术示范”(2016D09F013) （2016D09F013）
自治区科协学会重点资助项目资助(“百会万人下基层”科技服务重点活动)“移栽建园核桃树标准化管理技术培训示范”(2016)The science and technology ombudsman of Xinjiang Uyghur Autonomous Region service for counties and cities" The demonstration of the high grafting optimization and standard management technology of walnut" (2016D09F013) （“百会万人下基层”科技服务重点活动）
The key funding projects of association for science and technology institute of Xinjiang Uyghur Autonomous Region (the key activities of science and technology services by "Hundreds of thousands of people go to the grassroots") "the demonstration of standardized management techniques for the transplanting and orchard establishment of walnut trees" (2016) （the key activities of science and technology services by "Hundreds of thousands of people go to the grassroots"）
