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Sharma, Namrata
- Schismatomma galactinum (Lichenized Ascomycota), a Lichen Species New to India
Abstract Views :251 |
PDF Views:57
Authors
Reema Goni
1,
Namrata Sharma
1
Affiliations
1 Department of Botany, University of Jammu, Jammu 180 006, IN
1 Department of Botany, University of Jammu, Jammu 180 006, IN
Source
Current Science, Vol 110, No 5 (2016), Pagination: 770-771Abstract
The lichen family Roccellaceae is represented by 48 genera and about 200 species in the world, of which 56 species under 18 genera are known to occur in India. This family consists of mostly microlichens, with the genus Roccella, being the most prominent macrolichen in the group. Genus Schismatomma is an important microlichen of family Roccellaceae. Among the 11 species of Schismatomma known from the world, India is represented by four species, namely Schismatomma atomellum (Stirt.) Zahlbr., Schismatomma cinereum (Mull. Arg.) Zahlbr., Schismatomma gregantulum (Mull. Arg.) Zahlbr. and Schismatomma melastigmum (Nyl.) Zahlbr.Full Text
- Unique Pollen Reception in Tephrosia purpurea (Linn.) Pers., a Tropical Weed of Family Papilionaceae
Abstract Views :225 |
PDF Views:56
Authors
Affiliations
1 Department of Botany, University of Jammu, Jammu 180 006, IN
1 Department of Botany, University of Jammu, Jammu 180 006, IN
Source
Current Science, Vol 112, No 01 (2017), Pagination: 30-32Abstract
Flowering plants display a spectrum of breeding systems ranging from obligate xenogamy practiced by dioecious and self-incompatible taxa, to strict autogamy in species with cleistogamous flowers. Studies done on related species in different genera and families clearly depict selfing to be a derived condition. The reason for this includes assurance of seed-set, particularly in conditions of pollen or pollinator limitations. Several features are known to facilitate this transition from out-crossing to selfing, recent addition to which is the unique stigma and stylar movements.Full Text
- Selfing in Buxus wallichiana Baill.:A Trait or Strategy?
Abstract Views :231 |
PDF Views:50
Authors
Affiliations
1 Department of Botany, University of Jammu, Jammu 180 006, IN
1 Department of Botany, University of Jammu, Jammu 180 006, IN
Source
Current Science, Vol 118, No 7 (2020), Pagination: 1021-1022Abstract
Plants of Buxus wallichiana are evergreen trees 1,2 ; these are monoecious with male and female flowers aggregated together in a cyathium. In each inflorescence, a centrally placed female flower remains surrounded by 8–14 male flowers (Figure 1a,b). Individual male flower is small, incomplete, zygomorphic and averages 5 mm in size. It consists of 4 basifixed anthers enclosed within 5 tepals (Figure 1c). Female flower is slightly smaller than males and has an average size of 4.6 mm. It consists of 5 tepals enclosing a pistil comprising of a tricarpellary ovary and three short styles spread apart with the help of three nectariferous bulges. Each style terminates into bifid stigma (Figure 1d). Ovary is syncarpous, 3 loculed and each locule has ovules attached to a central placenta. Stigma is wet and papillate.Full Text
References
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- Reproductive Efficiency of Crotalaria mysorensis – A Vesperal Weed of Subtropics
Abstract Views :135 |
PDF Views:57
Authors
Affiliations
1 Department of Botany, University of Jammu, Jammu 180 006, IN
1 Department of Botany, University of Jammu, Jammu 180 006, IN
Source
Current Science, Vol 122, No 2 (2022), Pagination: 201-205Abstract
An evolutionary changeover between mating systems comes about frequently and independently in flowering plants. Crotalaria mysorensis Roth., an annual weed growing wild in the subtropical regimes of northwestern Himalaya, displays this shift effectively. The species appears as an outbreeder on the basis of its floral architecture. Floral phenological events, however, confirm it to be a strict inbreeder because of its vesperal nature and brief blooming period. This mating strategy provides reproductive assurance to the species, but with low seed germination.Keywords
Crotalaria mysorensis, Reproductive Efficiency, Seed Germination, Subtropical Regimes, Vesperal Weed.Full Text
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- Bharti, U., Sharma, E., Parihar, J. and Sharma, N., Genetic system of Artemisia maritima L.: an overexploited medicinal species under stress. Proc. Natl. Acad. Sci., India, Sect. B, 2018, 89(4), 1373– 1378.
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- Etcheverry, A. V., Aleman, M. M. and Fleming, T. F., Flower morphology, pollination biology and mating system of the complex flower of Vigna caracalla (Fabaceae; Papilionoideae). Ann. Bot., 2008, 102, 305–316.
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- Ramsey, M. and Vaughton, G., Inbreeding depression and pollinator availability in a partially self-fertile perennial herb Blandfordia grandiflora (Liliaceae). Oikos, 1996, 76, 465–474.
- Barrett, S. C. H., Harder, L. D. and Worley, A. C., The comparative biology of pollination and mating in flowering plants. Philos. Trans. R. Soc. London, Ser. B, 1996, 351, 1271–1280.
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- Mallick, S. A., Facultative dichogamy and reproductive assurance in partially protandrous plants. Oikos, 2001, 95, 533–536.
- Jacobi, C. M., Pollination biology of the exotic rattleweed Crotalaria retusa L. (fabaceae) in NE Brazil. Biotropica, 2005, 37(3), 356–362.