| 莫天利,龙芳.粉蕉苗期吸芽发育特点及内源激素响应特性[J].中国南方果树,2024,53(3): |
| 粉蕉苗期吸芽发育特点及内源激素响应特性 |
| Characteristics of Sucker Development and Endogenous Hormones Response during the Seedling Stage of Dwarf Banana |
| 投稿时间：2023-07-05 修订日期：2023-09-08 |
| DOI： |
| 中文关键词: 粉蕉 苗期 吸芽 生长发育 内源激素 |
| 英文关键词:Dwarf banana Seedling stage sucker Growth and development Endogenous hormones |
| 基金项目:外源独脚金内酯调控香蕉吸芽减少的机制（广西自然科学基金面上项目）；广西特色香蕉新品种选育及示范应用（广西科技重大专项）；基于简化基因组的广西粉蕉迁移路线研究（广西农业科学院基本业务专项）；良种选育及应用（广西农业科学院基本业务专项）；国家现代农业产业技术体系 |
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| 中文摘要: |
| 吸芽是香蕉着生于地下茎上的一种营养体，可选留作母株或作种苗，过多的吸芽会与母株进行营养竞争，人工除芽不仅增加了成本，还会增加枯萎病入侵的危险。植物的分枝数量主要受生长素、细胞分裂素和独脚金内酯3种植物激素的协同控制。本文以粉蕉品种“育粉6号”为研究材料，解剖观测苗期吸芽分化情况，测定球茎内生长素、细胞分裂素和独脚金内酯的含量变化，探讨香蕉吸芽分化发育与内源激素的关系。结果表明：粉蕉在10叶龄阶段后开始了吸芽的发育过程，芽眼和伸长芽的增长速率基本保持了恒定，生长素、细胞分裂素和独脚金内酯的含量也呈现出基本保持恒定的现象；独脚金内酯和生长素含量与芽眼的变化量存在显著的负相关，表明独脚金内酯作为生长素的第二信使负调控粉蕉的吸芽发育，起作用的阶段为表面芽点发育为芽眼这一阶段；细胞分裂素与吸芽发育指标之间不存在显著的相关性，表明细胞分裂素在内部芽点-外部芽点-芽眼-伸长芽的这一发育过程中不存在促进作用。研究可为粉蕉在种植过程中使用外源激素调节吸芽的生长发育提供数据基础和理论依据。 |
| 英文摘要: |
| Sucker is a nutrient that grows on the underground stem of bananas, which can be kept as a mother plant or as a seedling, and too many suckers will compete with the mother plant for nutrients. However, manual sucker removal not only increases the cost, but also increases the risk of fusarium wilt invasion. The number of branches in plants is mainly controlled by the synergistic control of three plant hormones: auxin, cytokinin and strigolactone. In this paper, the cultivar "Yufen No. 6" of Pisang Awak was used as the research material, and the sucker development were dissected, and the content changes of auxin, cytokinin and strigolactone in the bulb were measured to discuss the relationship between sucker development and endogenous hormones. The results showed that the development of sucker started after the 10th leaf stage, the growth rate of sprout eye and elongating buds remained constant, and the contents of auxin, cytokinin and strigolactone also showed constant; there is a significant negative correlation between strigolactone and auxin content and the change of sprout eye, indicating that strigolactone, as the second messenger of auxin, negatively regulates the development of sucking buds of banana, the effective stage is the stage when surface bud points develop into bud eyes; there is no significant correlation between cytokinin and suction bud development indicators, indicating that cytokinin does not have a promoting role in the development process of eyes in the buld- eyes on the buld-sprout eye- elongating bud. The research can provide a data basis and a theoretical basis for the use of exogenous hormones to regulate the growth and development of sucking buds during the planting of Pisang Awak. |
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