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Histological and Cytological Characterization of Anther and Appendage Development in Asian Lotus (Nelumbo nucifera Gaertn.)

1
Shanghai Chenshan Plant Science Research Center of Chinese Academy of Sciences, Shanghai Chenshan Botanical Garden, Shanghai 201602, China
2
Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai 201602, China
3
College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
4
Development Center of Plant Germplasm Resources, College of Life Science, Shanghai Normal University, Shanghai 200234, China
5
School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(5), 1015; https://doi.org/10.3390/ijms20051015
Received: 10 January 2019 / Revised: 21 February 2019 / Accepted: 22 February 2019 / Published: 26 February 2019
(This article belongs to the Section Molecular Plant Sciences)
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Abstract

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. View Full-Text
Keywords: Asian lotus; anther; pollen; microspore; anther appendage Asian lotus; anther; pollen; microspore; anther appendage
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Zhang, D.; Chen, Q.; Liu, Q.; Liu, F.; Cui, L.; Shao, W.; Wu, S.; Xu, J.; Tian, D. Histological and Cytological Characterization of Anther and Appendage Development in Asian Lotus (Nelumbo nucifera Gaertn.). Int. J. Mol. Sci. 2019, 20, 1015.

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