%A HUANG Xiu, TIAN Dai-Ke, ZHANG Wei-Wei, ZENG Song-Jun, MO Hai-Bo %T Comparison of Floral Organ Morphological Development between Single and Double Flowers in Nelumbo nucifera %0 Journal Article %D 2014 %J Plant Diversity %R 10.7677/ynzwyj201413126 %P 303-309 %V 36 %N 03 %U {https://journal.kib.ac.cn/CN/abstract/article_33318.shtml} %8 2014-05-25 %X
Five forms of flower are included in lotus (Nelumbo nucifera). The single flower is the primitive type of lotus flowers, followed by semidouble, double, duplicated and thousandpetalled flower. To understand the molecular mechanism underlying the flower doubling in Nelumbo, it is necessary to investigate morphologically the origin of different flower forms. We studied the differentiation of lotus floral buds by paraffin section of five cultivars in Nnucifera, representing the five forms of flower, ie.‘Dan Sajin’ (single), ‘Da Sajin’ (double), ‘Zhongshan Hongtai’ (duplicated), ‘Zhizun Qianban’ (fullydouble) and ‘Qianban Lian’ (thousandpetalled), respectively. The anatomical examination showed that the differentiation of the sepal and petal primodia shared a similar pattern, but the stamen and carpel primordia were distinct in differentiation. The normal differentiation processes of stamen and carpel primordia were observed in the flower buds of single, double and duplicatedpetalled cultivars. However, in ‘Zhizun Qianban’, a fullydouble cultivar, all the primordial stamens and carpels were transformed into the petals. The thousandpetalled cultivar didn’t produce either stamen primordia or carpel primordia but developed the tiny petals instead. These results suggested that the petals of doubleflowered lotus were mainly derived from the petalody of stamens, followed by pistils. For the thousandpetalled cultivar, further molecular studies are needed to understand the origin of the petals and the role of receptacle in flower doubling of lotus.