Studies on floral morphology and biology in Jasminum spp.

A KALAIYARASI; M V DHANANJAYA; SUJATHA A NAIR; RAJIV KUMAR; H S YOGEESHA; P M MUNIKRISHNAPPA; V DEVAPPA; S PAVITHRA

doi:10.56093/ijas.v89i6.90818

Authors

A KALAIYARASI Research Scholar, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India
M V DHANANJAYA Principal Scientist, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India
SUJATHA A NAIR Principal Scientist, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India
RAJIV KUMAR Principal Scientist, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India
H S YOGEESHA Principal Scientist, ICAR-Indian Institute of Horticultural Research Bengaluru
P M MUNIKRISHNAPPA Associate Professor, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India
V DEVAPPA Head, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India
S PAVITHRA Research Scholar, ICAR-Indian Institute of Horticultural Research, Bengaluru, Karnataka 560 089 India

https://doi.org/10.56093/ijas.v89i6.90818

Keywords:

Anther dehiscence, Anthesis, Floral morphology, Jasmine, Stigma receptivity

Abstract

The present investigation was carried out to study the floral morphology and biology of 5 genotypes during 2016-17. Many flowered cymes both terminal and axillary were observed in J. auriculatum and J. grandiflorum; whereas, cluster bearing flowers in terminal position were observed in J. multiflorum (IIHR JMâ€“1 and IIHR JMâ€“2), J. calophyllum, J. flexile and J. malabaricum. Flower bud was pointed and long in all genotypes; its colour was either green white (157 B) or white (155 C) or white (155 D).Tinge on flower bud was observed in J. grandiflorum (CO.1 Pitchi and Arka Surabhi), J. rigidum, J. nitidum and J. malabaricum. Flower petal tip was either sharp or blunt and flower colour on opening was either white (155 C) or white (155 D) or white with pinkish underneath (155 D) in all the genotypes. Among the 15 genotypes, J. grandiflorum var. CO.1 Pitchi recorded longest flower bud length (4.81 cm) and corolla tube length (2.92 cm); however, maximum corolla length was recorded in J. nitidum (2.15 cm). Maximum number of forks per cymes was recorded in J. auriculatum var. CO.1 Mullai (40.13). Maximum number (6.51) and length of calyx lobe (1.28 cm) was recorded in J. multiflorum â€“IIHRJM-2 and J. nitidum, respectively. Flower diameter ranged from 1.74 (J. auriculatum-IIHRJA-2) to 4.93 cm (J. nitidum), whereas number of petals varied from 4.97 (J. grandiflorum var. CO.1 Pitchi) to 10.67 (J. nitidum). All genotypes recorded one style per pistil and its length varied from 0.42 cm (J. auriculatum var. CO.2 Mullai) to 2.32 cm (J. grandiflorum var. CO.1 Pitchi). Anthesis and anther dehiscence was recorded earlier in summer months, while, it was delayed during cooler months. However, the peak anthesis was observed from 6:00 to 7:00 p.m. and anther dehiscence from 4:00 to 7:00 p.m. The earliest anthesis was observed in J. auriculatum genotypes and anther dehiscence was observed in J. auriculatum and J. multiflorum genotypes. The stigma was receptive 12 h before an thesis and up to 24 h of anthesis. The maximum receptivity was observed from the time of anthesis to 12 h after anthesis.

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References

Arumugam T, Jawaharlal M, Vijayakumar M and Bhattacharjee S K. 2002. Jasmine. All India Coordinated Research Project on Floriculture, IARI, New Delhi.

Champa B V. 2012. ‘Genetic diversity studies using morphological and molecular (RAPD) markers in Jasminum species’. Ph.D. Thesis, University of Agricultural Sciences, Bengaluru.

Gomez K A and Gomez A A. 1984. Statistical procedure for agricultural research, pp 196–211. Wiley Inter-Science Publication, New York (USA).

Khan W and Muthuswamy S. 1969. Some morphological variants of Jasminum auriculatum Vahl. South Indian Horticulture 17: 95–7.

Krishnaswamy N and Raman V S. 1948. Cytogenetical studies of the Indian Jasmines, taxonomy and chromosome numbers of four varieties of Jasminum sambac Ait. and other species. Journal of Indian Botanical Society 27(1): 77–83.

Laksmi J and Ganga M. 2017. Floral biology studies in certain commercial species of Jasmine (Jasminum spp.). International Journal of Agricultural Science Research 7: 443–6. DOI: https://doi.org/10.24247/ijasrjun201757

Ling C A, Hong G X and Mei H X. 2011. Studies on flowering habit and ecological pollination characteristics of Jasminum mesnyi Hance. Guizhou Agricultural Sciences 48: 50–4.

Nirmala K S, Champa B V and Hegde M. 2017. Morphological diversity of jasmine cultivars and wild species in Karnataka. Mysore Journal of Agricultural Sciences 51(4): 822–31.

Raman V S. 1955. cytogenetics of Indian Jasmines II.The somatic chromosomes. Cytologia 20: 19–31. DOI: https://doi.org/10.1508/cytologia.20.19

Singh D. 2016. Jasminum multiflorum (Burm. f.) Andr: Botany, chemistry and pharmacology. Asian Journal of Chemistry 28(12): 2575–78. DOI: https://doi.org/10.14233/ajchem.2016.20110

Taylor H. 1945. Cytotaxonomy and phylogeny of the Oleaceae. Britannia 5: 337–67. DOI: https://doi.org/10.2307/2804889

Veluswamy P, Muthuswamy S and Thangaraj T. 1973. Origin and distribution of jasmine. Indian Orniental Horiculture 4: 45–65.