Temporal changes of disodium fluorescein transport in hazelnut during fruit development stage
Temporal changes of disodium fluorescein transport in hazelnut during fruit development stage
复制标题
榛子果实发育过程中二钠荧光素转运的时间变化
DOI：
10.1016/j.scienta.2012.12.001
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发表时间：
2013-02-04
影响因子：
4.3
通讯作者：
Wang, Zhanwu
中科院分区：
文献类型：
--
作者：
Liu, Jianfeng;Cheng, Yunqing;Wang, Zhanwu
平榛（Corylus heterophylla Fisch）在中国东北地区通常空壳率较高。在2010 - 2012年期间，对雌花簇和果实的结构变化进行了观察，并研究了荧光素二钠从果柄向胚珠和珠柄运输的模式。结果表明，榛子的子房和胚珠分别在开花后约20天和45天可见，在开花后55天之前，一个子房内的两个胚珠大小相等，随后随着果实的发育，胚珠大小的差异变得明显。空壳果实内的胚珠大小变化很小，直到收获时长度保持在2.0 - 4.0毫米。然而，在整个果实发育阶段，空壳果实的子房大小与饱满果实的子房大小非常接近。对于饱满的坚果，在开花后60 - 90天，荧光素二钠在胚珠和珠柄的连接处出现运输障碍，导致一个胚珠败育，但直到接近收获时，在珠柄中仍可观察到明亮的荧光。对于空壳果实，在开花后55天，荧光素首先在胚珠和珠柄的连接处出现运输障碍，然后在开花后60 - 90天，珠柄无法执行运输功能。总之，运输障碍首先发生在胚珠和珠柄的连接处，然后发生在珠柄，这些现象与平榛空壳果实的形成密切相关。© 2012爱思唯尔有限公司。保留所有权利。
Corylus heterophylla Fisch typically produces high ratio of blank nut in Northeast China. Structure changes of female flower cluster and fruit were observed and patterns of disodium fluorescein transport into ovule and funiculus from fruit stalks were studied in the year of 2010-2012. The results indicated that early ovary and ovule of hazelnut were visible on about 20 and 45 days after blooming respectively, and the sizes of two ovules within an ovary were equal prior to 55 days after blooming, then the differences in ovule size became obviously along with development of the fruit. Ovules within blank fruit had little changes in size and maintained 2.0-4.0 mm in length until harvest. However, the ovary size of blank was much closed to that of filled one during the whole fruit development stage. For filled nut, disodium fluorescein transport obstacle occurred at junction point of ovules and funiculus and led to the abortion of one ovule from 60 to 90 days after blooming, while bright fluoresce could be observed in funiculus until near harvest. For the blank fruit, fluorescein transport obstacle happened at junction point of ovules and funiculus first on 55 day after blooming, then the funiculus failed to execute the transport function from 60 to 90 days after blooming. In conclusion, transport obstacle occurred at junction point of ovules and funiculus first, and then happened in funiculus, and these phenomena were closely related with blank fruit formation in C heterophylla Fisch. (C) 2012 Elsevier B.V. All rights reserved.