Floral Organogenesis of Red Pitaya (<i>Hylocereus monacanthus</i>)

SUN Peiguang; CHENG Zhihao; SUN Changjun; GUO Suxia; GUO Gang; MIAO Hongxia; LI Hongli; WU Qiong

doi:10.19303/j.issn.1008-0384.2020.09.004

Volume 35 Issue 9

Sep. 2020

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SUN P G, CHENG Z H, SUN C J, et al. Floral Organogenesis of Red Pitaya ( Hylocereus monacanthus) [J]. Fujian Journal of Agricultural Sciences，2020，35（9）：943−949 doi: 10.19303/j.issn.1008-0384.2020.09.004

Citation:

SUN P G, CHENG Z H, SUN C J, et al. Floral Organogenesis of Red Pitaya ( Hylocereus monacanthus ) [J]. Fujian Journal of Agricultural Sciences，2020，35（9）：943−949 doi: 10.19303/j.issn.1008-0384.2020.09.004

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Floral Organogenesis of Red Pitaya (Hylocereus monacanthus)

doi: 10.19303/j.issn.1008-0384.2020.09.004

1.
Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Banana Genetic Improvement of Hainan Province, Haikou, Hainan　571101, China
2.
Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan　571101, China
3.
Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan　571737, China

Received Date: 2020-03-30
Rev Recd Date: 2020-08-17
Publish Date: 2020-09-28

Abstract

Abstract

Objective Occurrence, distribution, anatomical structure, and morphological characteristics of floral organs of red pitaya (Hylocereus monacanthus) were microscopically observed to study the differentiation and regulation of the organogenesis. Method Flower buds on red pitaya plants at different developmental stages were examined under a VHX-5000 digital microscope. Result The flower buds were formed mainly below the spines on the branches. The sepal and petal primordia were initiated spirally. The multi-round stamen primordia originated at the base of perianth on proximal before distal axis. Anthers, including 4 pollen sacs lined symmetrically and split longitudinally, grew at the bottom. There were as many as 30 carpels primordia appeared simultaneously. Multiple carpel primordia might form ovaries that contained a single locule. Two rows of circinotropous ovules were inserted on the abdominal suture. The mature stigma showed 24-30 shallow clefts with numerous papilla cells on the surface. The style had a hollow canal with an inner surface densely covered with passage cells. Conclusion The sequence of the floral organogenesis of red pitaya started from sepal primordia, developed into petal primordia, then stamen primordia, and finally, carpel primordia. However, there were overlaps in time of appearance on some of the organs.
- Red pitaya (Hylocereus monacanthus),
- floral organ,
- anatomical structure,
- digital microscope

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References(23)

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