Histological and Morphological Studies of Pollen Grains from Elongata, Reduced Elongata and Staminate Flowers in Carica papaya L.

Phuangrat, Bencharong; Phironrit, Namthip; Son-ong, A.; Puangchon, P.; Meechai, Asawin; Wasee, Sirikul; Kositratana, W.; Burns, Parichart

doi:10.1007/s12042-013-9118-0

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Colpus membrane was uneven with coarsely irregular granules and colpi margin was uneven with granules (Figures 1 1c-5c, 2 1c-5c, 3 1c-5c, 4 1c-5c). Phuangrat et al (2013) observed reticulate exine ornamentation at 2500 ×. In our studies, foveolate, reticulate, and fossulate exine ornamentation were observed at 7000 ×.…”

Section: Resultssupporting

confidence: 61%

“…Papaya pollen grains were zonoaperturate with three colpori (Figures 1 1a-5a, 2 1a-5a, 3 1a-5a, 4 1a-5a). Fisher (1980), Phuangrat et al (2013) and Zini et al (2018) also showed that pollen grains were tricolporate, isopolar, radiosymmetric, small-and medium-sized, and spheroidal.…”

Section: Resultsmentioning

confidence: 99%

“…'Solo'. Phuangrat et al (2013) observed pollen of the Thai papaya cultivar 'Khak Nual'. Zini et al (2018) studied pollen morphological characters of two papaya germplasms from Argentina.…”

Section: Y Zhang Et Almentioning

confidence: 99%

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Pollen morphological analysis of papaya (Carica papaya L.)

Zhāng

Xiong

YouJie

et al. 2021

Crop Breed. Appl. Biotechnol.

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There is little information on pollen morphological analysis of papaya cultivars with different flesh color and origins. We observed pollen morphological characters of 17 papaya cultivars through scanning electron microscopy. The results showed that papaya pollen grains were monads, tricolporate, and small and medium-sized. The pollen grains were oblate-spheroidal to spheroidal. Foveolate, reticulate, and fossulate exine ornamentation were observed. Colpi width had maximum coefficient of variation of 25%; Shannon diversity index of all qualitative characters reached over 0.8. Using cluster analysis, 17 papaya cultivars were divided into three groups; there was no relationship between flesh colors and origins. The study findings suggest that pollen morphological analysis is valuable to provide references for breeding and genetic improvement of papaya.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

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Pollen morphological analysis of papaya (Carica papaya L.)

Zhāng

Xiong

YouJie

et al. 2021

Crop Breed. Appl. Biotechnol.

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“…The number of viable, red stained pollen grains per microscopic field were counted and expressed in per cent. Pollen germination was measured by incubating the pollen grains in a germination medium containing 0.15 M sucrose, 2.43 mM boric acid and 2.12 M calcium nitrate at 28°C for 24 hours [14]. The pollen grain with a pollen tube length greater than its diameter was considered to be germinated pollen and the germination was expressed in per cent.…”

Section: Pollen Parametersmentioning

confidence: 99%

“…Pollen viability was significantly higher in 'CO 7' (92.31%) wheras in V. candamarcensis, it was significantly lower (68.45%). Varying Influence of geographical location on pollen production of genotypes have been reported [14,20,21]. Higher pollen viability is advantageous in the hybridization programme and low pollen viability observed in V. cauliflora needs attention and it may be necessary to collect more pollen in the wild relatives of papaya for hybridization programme.…”

Section: Pollen Viabilitymentioning

confidence: 99%

An Analysis of Pollen Parameters, Fruit Set and Fruit Development During Attempts on Intergeneric Hybridization of Papaya (Carica papaya L.)

Aseef

Soorianathasundaram

Paramaguru

et al. 2021

CJAST

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Research was conducted at the University Orchard, Horticultural College and Research Institute, to investigate the extent of pollen production, pollen fertility, fruit set, fruit growth and seed set as well as seedling vigour when two wild relatives of papaya (Vasconcellea cauliflora and Vasconcellea candamarcensis) are involved in the hybridization programme as male parents with three papaya cultivars (CO 7, TNAU Papaya CO 8 and Pusa Nanha) as female parents. Among the two wild relatives, V. candamarcensis was more polleniferous but with significantly lesser pollen viability and germination than V. cauliflora. Among the six intergeneric crosses, although the fruit set ranged from 60.00% to 93.33% the fruit retention till harvest was only 30.77 per cent to 35.71 per cent. The study also revealed metaxenic influence of wild parent on the growth of the fruits derived after crossing. Seed set was observed only with CO 7 as female parent but the seed size and weight, germination and seedling vigour recorded by intergeneric crosses of CO 7 with Vasconcellea were found to be low. The implications of the observations are discussed in relevance to employing the wild relatives for improvement of papaya.

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