Browsing Botany by Issue Date

Some aquatic hyphomycetes from Sri Lanka

Gunasekera, S.A.; Rukmani, M.P.R. (Natural Resources, Energy and Science Authority of Sri Lanka, 1984)

δ13C - variations of leaves in forests as an indication of reassimilated CO2 from the soil

Schleser, G.H.; Jayasekera, R. (Springer-Verlag, 1985)

An attempt has been made to evaluate the contribution of soil respired CO2 to the total assimilation of a forest tree, by heeding the 13C-concentrations of CO2 from the free atmosphere and from mineralization processes ...

Elemental composition of different plant species

Markert, B.; Jayasekera, R. (Journal of Plant Nutrition, 1987)

Element concentrations in leaves and needles of different plant species (Rhizophora mangle, Astertri‐polium, Vaccinium vitis—idaea and Pinus sylvestris) are presented in the form of element concentration cadasters with ...

Seasonal changes in potential net photosynthesis of sun and shade leaves of Fagus sylvatica L.

Jayasekera, R.; Schleser, G.H. (Elsevier, 1988)

Sun and shade leaves of the deciduous tree, Fagus sylvatica, were investigated for their potential photosynthetic activity during the course of one growing season. During the initial period of leaf development and expansion, ...

Multi-laboratory chemical characterization of ecological samples

Jayasekera, R.; Markert, B. (Springer-Verlag, 1989)

The influence of high concentrations of sodium (Na), chlorine (Cl) and bromine (Br) on the analytical results obtained by means of several modern analytical methods by different laboratories was investigated. The results ...

Pod yield on winged bean after chemical treatment for choanephora blight disease

Gunasekera, S.A.; Shanthichandra, W.K.N. (Natural Resources, Energy and Science Authority of Sri Lanka, 1990)

Effect of Sodium chloride (NaCl) salinity on some physiological traits of rice (Oryza sativa L.)

Ranasinghe, A.; Peiris, B. (Sri Lanka Association for the Advancement of Science, 1991)

Studies on the composition and biodegradation of cane molasses distillery slop of the Sevanagala sugar factory

Chandrasena, G.; Widanapathirana, G.S. (Sri Lanka Association for the Advancement of Science, 1991)

Floristic composition of the undergrowth at a selected site in Hurulu forest reserve (sigiriya)

Perera, B.M.S.; Solangaarachchi, S.M. (Sri Lanka Association for the Advancement of Science, 1991)

Chemical composition of the mangrove, Rhizophora mangle L.

Jayasekera, R. (Elsevier, 1991)

Enrichment and deposition of selected minerals in mangrove, Rhizophora mangle, plants grown under glasshouse conditions at near-constant salinity were investigated. The results show that R. mangle is capable of concentrating ...

Seasonal changes in organic carbon content of leaves of deciduous trees

Jayasekera, R.; Schleser, G.H. (Elsevier, 1991)

Changes in organic carbon content were investigated during the course of one growing season in the leaves of beech (Fagus sylvaticaL.) and oak (Quercus robur L.). Considerable alterations in leaf carbon content were found ...

Elemental concentrations in a tropical montane rain forest in Sri Lanka

Jayasekera, R. (Kluwer Academic Publishers, 1992)

As a preliminary to studies on biogeochemistry of a tropical montane rain forest at about 1800 m altitude in Sri Lanka, the concentrations of 17 chemical elements in different forest compartments, i.e. in leaves of six ...

Leaf flavonoid glycosides as chemosystematic characters in Ocimum

Grayer, R.J.; Kitea, G.C.; Veitcha, N.C.; Eckerta, M.R.; Marin, P.D.; Senanayake, S.P.; Paton, A.J. (Biochemical Systematics and Ecology, 1993)

Abstract Thirty-one accessions of nine species belonging to three subgenera of Ocimum (basil, family Lamiaceae) were surveyed for flavonoid glycosides. Substantial infraspecific differences in flavonoid profiles of the ...

The flavonoids of the genus Lathyrus and a comparison of flavonoid patterns within the tribe vicieae

Ranabahu, P.; Harborne, J.B. (Biochemical Systematics and Ecology, 1993)

A leaf survey of Lathyrus showed that the flavonols kaempferol and quercetin were present in 36 of 38 species representing nine sections of the genus. Six glycosides of each flavonol were characterised. Kaempferol ...

Implementation of specimen banking concepts in developing countries: First trial - Sri Lanka

Jayasekera, R.; Rossbach, M. (Elsevier, 1993)

The necessity to establish a small scale Environmental Specimen Bank projects in tropical countries is stressed. An example from Sri Lanka demonstrates the needs, the benefits and the prospects of such an integrated research ...

Soil aeration as an ecological factor governing mangrove zonation

Jayasekera, R.; Lieth, H. (Springer-Netherlands, 1993)

The growth of both Rhizophora mangle L. and Rhizophora mucronata Lamk. in saline sand was highly promoted by flooded, reducing conditions in comparison to drained, aerobic conditions, showing the strong tolerance of ...

Effect of available rooting volume on seedling growth

Jayasekera, R.; Lieth, H. (Springer-Netherlands, 1993)

During the early establishment phase of Rhizophora mangle L. seedlings, a consistent positive relationship between available soil volume (varying from 2-91) and growth rate of Rhizophora manglehas been established under ...

Interelement relationships in leaves of tropical montane trees

Jayasekera, R. (Kluwer Academic Publishers, 1993)

Chemical concentrations in leaves are reported for 14 elements in 6 tree species of a montane rain forest in Sri Lanka. The plant taxa varied greatly in chemistry and a few taxa appeared to concentrate several elements in ...

Interelement correlations in the mangrove, Rhizophora mangle L.

Jayasekera, R.; Lieth, H. (Springer-Netherlands, 1993)

Assuming linear relationships between elements, some significant interelement relationships were detected in Rhizophora mangle grown over a salinity gradient. Sodium (Na) had a clear antagonistic effect on the uptake of ...

Sampling of tropical terrestrial plants with particular reference to the determination of trace elements

Jayasekera, R. (VCH Publisher, 1994)

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Browsing Botany by Issue Date

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