| 摘要: |
| 【目的】对长白山早春类短命植物堇叶延胡索地下芽的发生发育过程进行显微观察，并对芽体生长进行测定和相关分析，揭示夏眠期植物个体的发育规律。【方法】于2014年5月至11月在堇叶延胡索生长季和夏眠期，定期挖取块茎进行解剖观察和扫描电镜显微照相，明确地下芽发生发育进程，测定各阶段芽体大小，揭示地下芽生长发育节律。【结果】堇叶延胡索块茎于盛花期完成更新生长，地上生活周期结束后，随即进入2个月左右的休眠期，于7月中下旬开始萌动，其地下芽的形态分化历经2个月左右，进程可分为萌芽期、花序原基分化期、花序形成期和花器官分化期4个时期。地下芽形态发生完成后，继续芽体的生长发育，最终以成熟的花序进行越冬休眠。整个夏眠期地下芽芽长呈指数函数生长，芽径则呈线性函数生长，芽长与芽径之间呈幂函数异速生长关系，且相关系数均达到极显著水平。【结论】堇叶延胡索夏眠期块茎需短暂休眠后完成地下芽的形态建成，地下芽存在优先伸长的异速生长节律。 |
| 关键词: 堇叶延胡索 地下芽 分化 异速生长 |
| DOI： |
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| 基金项目:国家自然科学基金项目（31170180） |
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| Differentiation and growth of underground buds of spring ephemeroid plant Corydalis fumariifolia during summer dormancy |
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LIU Xuelian,ZHU Junyi,YANG Yunfei
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| Abstract: |
| 【Objective】In this study,the organogenesis and growth of underground buds of Corydalis fumariifolia,a spring ephemeroid plant from the Changbai Mountains,China were observed and its individual development pattern in summer dormancy was revealed.【Method】The development process and growth of underground buds were observed and studied by anatomic and SEM micrograph observation.The size of underground buds was determined through regular excavation of underground tubers in the growing season and summer dormancy from May to November 2014.【Result】The tubers of C.fumariifolia renewed the bulb in the full blossom period.Tubers switched to dormancy for two months after the end of aboveground life cycle,and buds differentiation began in late July.The differentiation period was two months and can be divided into sprout stage,inflorescence primordium differentiation,inflorescence formative and floral organ differentiation stage.When the buds finished morphogenesis,they continued grow and went into dormancy with mature inflorescences ultimately.During the entire summer dormancy,the length of the underground buds of C.fumariifolia grew exponentially,while the diameter grew linearly.There was significant allometric growth in the form of a power function between length and diameter of the buds.【Conclusion】C.fumariifolia needs short dormancy to complete underground bud formation,and underground buds have preferred elongation allometric growth rhythm. |
| Key words: Corydalis fumariifolia underground bud differentiation allometric growth |
