Histological and Cytological Characterization of Anther and Appendage Development in Asian Lotus (Nelumbo nucifera Gaertn.)
Histological and Cytological Characterization of Anther and Appendage Development in Asian Lotus (Nelumbo nucifera Gaertn.)
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亚洲莲 (Nelumbo nucifera Gaertn.) 花药和附属物发育的组织学和细胞学特征
DOI：
10.3390/ijms20051015
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发表时间：
2019-02
期刊：
影响因子：
--
通讯作者：
Daike Tian
中科院分区：
文献类型：
--
作者：
Dasheng Zhang;Qing Chen;Qingqing Liu;Fengluan Liu;Lijie Cui;Wen Shao;Shaohua Wu;Jie Xu;Daike Tian
莲花（Nelumbo Adans）是一种多年生水生植物，具有重要的园艺、医药、食品、宗教、文化价值。种质资源丰富，通过杂交和自然选择培育出2000多个品种。花药中的小孢子发生和雄配子发生对开花植物的杂交具有重要意义。然而，很少有人知道的细胞学事件，特别是有关雄蕊，在繁殖过程中的莲花。为了更好地了解莲雄性生殖发育的控制机制，我们研究了亚洲莲（N。nucifera）。花药形态发生的细胞学分析表明，莲花药发育过程中既有共同的细胞学事件，也有特殊的细胞学事件，成熟花粉粒的形成主要是通过减数分裂和有丝分裂进行的。有趣的是，在亚洲莲和美洲莲（N. lutea）。为了便于今后对莲雄性生殖的研究，我们根据花粉发育的细胞学特征将其分为11个阶段。这一发现丰富了我们对莲花粉和附属物发育的认识，同时也加深了对莲属植物种间分化的认识。nucifera和N. lutea
The lotus (Nelumbo Adans.) is a perennial aquatic plant with important value in horticulture, medicine, food, religion, and culture. It is rich in germplasm and more than 2000 cultivars have been cultivated through hybridization and natural selection. Microsporogenesis and male gametogenesis in the anther are important for hybridization in flowering plants. However, little is known about the cytological events, especially related to the stamen, during the reproduction of the lotus. To better understand the mechanism controlling the male reproductive development of the lotus, we investigated the flower structure of the Asian lotus (N. nucifera). The cytological analysis of anther morphogenesis showed both the common and specialized cytological events as well as the formation of mature pollen grains via meiosis and mitosis during lotus anther development. Intriguingly, an anatomical difference in anther appendage structures was observed between the Asian lotus and the American lotus (N. lutea). To facilitate future study on lotus male reproduction, we categorized pollen development into 11 stages according to the characterized cytological events. This discovery expands our knowledge on the pollen and appendage development of the lotus as well as improving the understanding of the species differentiation of N. nucifera and N. lutea.
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