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| 1 | Paraffin section observation of flower bud differentiation of Chimonanthus praecox in Kunming and comparison of the differentiation processes in different regions,China显示文摘Chimonanthus praecox is an important ornamental plant and cut flower material in China.It blooms in the freezing winter and its flower emits charming fragrance.However,in different region the flowering time is variable.In order to understand the flowering mechanism of Ch.praecox in the winter,we studied the flower bud differentiation in Spring City-Kunming using paraffin sectioning method in the present study.Meanwhile we compared the differentiation process difference from different regions.It was found that the temperature is the key factor for its flower bud differentiation and blossom of Ch.praecox.In the process of bud differentiation,the temperature 20℃was the optimum for inducing changes from vegetative axillary buds to reproductive buds and subsequent morphological differentiation in Ch.praecox.Furthermore in the first three differentiation periods—tepal primordial stage,staminal primordial stage and pistil primordial stage,Kunming took the shortest time to finish the process due to very rapid temperature rise to 20℃,whereas,in Zhengzhou the time for these differentiations was the longest,which may be caused by the slow temperature rise.After May,the high temperature stress forced the flower buds into the first long dormant period in all regions except Kunming.In Kunming,the average temperature was only 20–25℃,so the flower bud continued to differentiate.In all regions,Kunming is the first to complete whole flower bud differentiation even on the early August,and started the second dormancy very early but very long.In the other regions,the plants went through a shorter dormancy and the low temperature broke the dormancy rapidly.Contrarily the plants of Kunming spent a longer period for the low temperature.Thus,the low temperature less than 10℃is a key factor to breaking the second dormancy.Surely the regular effects of temperature on flower bud differentiation and blossom is very helpful for florescence regulation of Ch.praecox. | Sijin Li Nan Yang Longqing Chen | 2022 | Horticultural Plant Journal2022，8，2： | 2 |
| 2 | 蜡梅属植物精油成分及药理活性研究进展显示文摘蜡梅属植物是我国特有的传统药用植物,分布广泛,资源丰富。精油是蜡梅属植物主要的活性成分之一,包括萜类化合物、芳香族化合物和脂肪族化合物等多种类型的化学成分,具有抑菌、抗炎、抗氧化、抗病毒和止咳平喘等药理活性,对血管性痴呆、急性肺损伤和溃疡性结肠炎等疾病有较好的治疗作用。本文对蜡梅属植物精油中主要成分的化学结构与生源合成途径进行了系统的分类整理,对相关的生物活性作简要概述,以期为进一步开发和利用蜡梅属植物资源提供有益参考。 | 何德颖 肖薇依 黎成 邹峥嵘 | 2023 | 天然产物研究与开发2023，35，9： | 0 |
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