| 何嵩涛,刘国琴,张 睿,刘进平.‘黄梨’叶芽越冬休眠特性及其与抗氧化代谢的关系[J].中国南方果树,2019,48(3): |
| ‘黄梨’叶芽越冬休眠特性及其与抗氧化代谢的关系 |
| Chilling impact on dormancy and antioxidant metabolism of pear overwintering period |
| 投稿时间：2019-01-04 修订日期：2019-01-04 |
| DOI：10.13938/j.issn.1007-1431.20190009 |
| 中文关键词: 黄梨 叶芽 越冬休眠 需冷量 抗氧化代谢 |
| 英文关键词:Pyrus pyrifolia cv. Huangli leaf bud overwintering dormancy chilling requirement antioxidant metabolism |
| 基金项目:国家自然科学(31560537)；贵州省科学技术(黔科合J [2015]2040号)。第一作者：何嵩涛(1974-),男,硕士,副教授,主要从事园艺园林植物栽培生理及资源研究。E-mail: hesongtao@126.com |
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| 中文摘要: |
| 为了解贵州原产梨种质资源威宁‘黄梨’(Pyrus pyrifolia cv. Huangli)的越冬休眠特性,探索其与抗氧化代谢之间的关系,本研究以30年生威宁‘黄梨’为试材,在越冬休眠期的不同阶段采集一年生枝条进行室内培养,分析‘黄梨’叶芽的休眠状态；采用三种模型计算‘黄梨’的需冷量；测定‘黄梨’休眠期不同阶段叶芽内的抗氧化代谢情况,分析其与‘黄梨’休眠进度的关系。结果表明,‘黄梨’叶芽打破内休眠的需冷量为1200-1426 CH(7.2℃模型)、929-1098 CH(0-7.2℃模型)和810.5-914 CU(犹他模型)；‘黄梨’叶芽休眠进度与POD活性最为相关(r=0.960)且存在显著线性回归关系(y=45.51+1.92x, R2=0.9210),因此可以用叶芽POD的活性反映‘黄梨’叶芽的休眠状态。 |
| 英文摘要: |
| To explore the dormancy characteristics of Pyrus pyrifolia cv. Huangli (a native pear germplasm of Weining in Guizhou province) in overwintering period, and its relationship with antioxidant metabolism, 30-year-old "Huangli" was used as material, and one-year-old branches were collected at different stages in winter for indoor culture. The dormancy state of "Huangli" in leaf buds was analyzed. Three models were used to calculate the chilling requirement of "Huangli". The antioxidant metabolism in leaf buds at different dormancy stages and its relationship with dormancy progress was determined. The results showed that the chilling requirement of "Huangli" in leaf buds was 1200-1426 CH (7.2 °C model), 929-1098 CH (0-7.2 °C model) and 810.5-914 CU (Utah model); The progress of leaf bud dormancy was most correlated with POD activity (r=0.960), and a linear regression relationship (y=45.51+1.92x, R2=0.9210) exist, so the activity of POD could be used to reflect the dormancy state of leaf bud in‘Huangli’ |
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