| 饥饿胁迫对澳洲坚果早期果实及果柄能量代谢的影响 |
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| 引用本文： | 杨为海,向沛锦,陆超忠.饥饿胁迫对澳洲坚果早期果实及果柄能量代谢的影响[J].热带作物学报,2021,42(11):3219-3226. |
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| 作者姓名： | 杨为海 向沛锦 陆超忠 |
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| 作者单位： | 1. 宜春学院生命科学与资源环境学院,江西宜春 3360002. 中国热带农业科学院南亚热带作物研究所,广东湛江 5240913. 华中农业大学园艺林学学院,湖北武汉 430070 |
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| 基金项目： | 江西省教育厅科技项目(190847);国家自然科学基金项目(32060652);滇桂黔石漠化地区特色作物产业发展关键技术集成示范项目(SMH2019-2021) |
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| 摘 要： | 为揭示饥饿胁迫下澳洲坚果果实脱落与能量代谢的关系,以‘H2’澳洲坚果为试材,在果实发育早期对结果母枝进行环剥+去叶处理,定期测定果柄及果实不同组织中能量物质（ATP、ADP与AMP）含量、能荷（EC）水平和能量代谢关键酶（H+-ATPase与Ca2+-ATPase）活性的变化。结果表明：与对照相比,环剥+去叶处理明显促进了澳洲坚果早期果实脱落。自处理起至果实开始剧烈脱落时（处理后0~3 d）,果皮的AMP与ADP、种子的ATP与ADP以及果柄的ATP、ADP与AMP含量均显著增加,果皮与种子的H+-ATPase以及果柄的H+-ATPase和Ca2+-ATPase活性明显增强,果柄与种子的EC水平显著升高,但果皮的EC值明显下降。在处理后期（处理后4~5 d）,随着果实脱落加剧,果柄的Ca2+-ATPase以及果皮与种子的H+-ATPase及Ca2+-ATPase活性均显著增加,果柄和果皮的ATP以及果皮与种子的AMP含量均明显升高,而EC水平仅在果柄中显著提高。这些结果说明,饥饿胁迫可能通过影响澳洲坚果果柄及果实的能量代谢特性来影响早期果实脱落。
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| 关 键 词： | 澳洲坚果 饥饿胁迫 能量代谢 果实 果柄 |
| 收稿时间： | 2021-03-03 |
Effects of Starvation Stress on Energy Metabolism in the Fruitlet and Carpopodium of Macadamia |
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| YANG Weihai,XIANG Peijin,LU Chaozhong.Effects of Starvation Stress on Energy Metabolism in the Fruitlet and Carpopodium of Macadamia[J].Chinese Journal of Tropical Crops,2021,42(11):3219-3226. |
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| Authors: | YANG Weihai XIANG Peijin LU Chaozhong |
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| Institution: | 1. College of Life Science and Resources and Environment, Yichun University, Yichun, Jiangxi 336000, China2. South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong 524091, China3. College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei 430070, China |
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| Abstract: | In order to explore the relationship of fruit abscission with energy metabolism in macadamia under starvation stress, a treatment of girdling plus defoliation was made on the bearing shoots of macadamia cultivar ‘H2’ at the early stage of fruit development, and the changes in the energy contents (ATP, ADP and AMP), energy charge (EC) levels, and the activity of key enzymes related to energy metabolism (H +-ATPase and Ca2+-ATPase) in the carpopodium and the different fruit tissues were investigated regularly. The results showed that a severe fruitlet drop occurred under the starvation stress induced by girdling plus defoliation treatment. From the beginning of treatment to the starting of severe fruit shedding (0-3 d after treatment), the contents of AMP and ADP in pericarp, ATP and ADP in seed and fruit stalk increased significantly, the activity of H+-ATPase in pericarp and seed and the capacity of H+-ATPase and Ca2+-ATPase in carpopodium were significantly enhanced, and the EC level of carpopodium and seed was elevated obviously, but the EC value of pericarp decreased significantly. With the intensification of fruit abscission at the later stage of treatment (4-5 d after treatment), the significantly increased activity in the Ca2+-ATPase of carpopodium and the H+-ATPase and Ca2+-ATPase of pericarp and seed occurred, and the content of ATP in carpopodium and pericarp and the level of AMP in pericarp and seed were obviously raised, while the EC level was significantly increased only in carpopodium. The results suggested that starvation stress might affect early fruit abscission by influencing the energy metabolism characteristics of macadamia pedicel and fruit. |
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| Keywords: | Macadamia starvation stress energy metabolism fruit carpopodium |
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