Histological and Morphological Studies of Pollen Grains from Elongata, Reduced Elongata and Staminate Flowers in Carica papaya L
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Author list: Phuangrat B., Phironrit N., Son-ong A., Puangchon P., Meechai A., Wasee S., Kositratana W., Burns P.
Publication year: 2013
Volume number: 6
Issue number: 4
Start page: 210
End page: 216
Number of pages: 7
ISSN: 1935-9756
eISSN: 1935-9756
Languages: English-Great Britain (EN-GB)
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Abstract
The quality and quantity of pollen from three types of flowers; elongata, reduced elongata and staminate from the commercialized Thai papaya cultivar 'Khak Nual' were determined using pollen morphology, pollen physical characters and pollen development processes. Pollen development progressed at the same pace in the three types of pollen-producing flowers and was consistent with pollen development in many angiosperms. Pollen morphology showed that papaya pollen grains are tricolporate, with three apertures, and there is no significant difference in diameter (25.18-25.72 μm) and weight (11.76-15.45 ng) among pollen sources. The staminate flower shows the lowest amount of pollen, with 12,368 pollen per anther, but higher viability and germination rates of 95.53 % and 53.64 %, respectively. In contrast, the elongata type shows the highest amount of pollen grains with 14,884 pollen per anther and the lowest viability and germination rates, 93.06 % and 46.33 % respectively. The physical characteristics of pollen grains from reduced elongate and elongate flowers are similar. Reduced elongate flower type can donate pollen without self-pollinating. © 2013 Springer Science+Business Media New York.
Keywords
Carica Papaya, Male gametophyte, Pollen, Reduced Elongata, Staminate
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