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Full-Text Articles in Life Sciences
Responses Of Plants In Polar Regions To Uvb Exposure : A Meta-Analysis, K. K. Newsham, Sharon A. Robinson
Responses Of Plants In Polar Regions To Uvb Exposure : A Meta-Analysis, K. K. Newsham, Sharon A. Robinson
Sharon Robinson
We report a meta-analysis of data from 34 field studies into the effects of UV-B radiation on Arctic and Antarctic bryophytes and angiosperms. The studies measured plant responses to decreases in UV-B radiation under screens, natural fluctuations in UV-B irradiance, or increases in UV-B radiation applied from fluorescent UV lamps. Exposure to UV-B radiation was found to increase the concentrations of UV-B absorbing compounds in leaves or thalli by 7% and 25% (expressed on a mass or area basis, respectively). UV-B exposure also reduced aboveground biomass and plant height by 15% and 10%, respectively, and increased DNA damage by 90%. …
Growth, Chlorophyll Fluorescence And Biochemical Markers In Clonal Ramets Of Shisham (Dalbergia Sissoo Roxb.) At Nursery Stage, Azamal Husen Dr.
Growth, Chlorophyll Fluorescence And Biochemical Markers In Clonal Ramets Of Shisham (Dalbergia Sissoo Roxb.) At Nursery Stage, Azamal Husen Dr.
Dr. Azamal Husen
No abstract provided.
Adiantum Viridimontanum, Aspidotis Densa, Minuartia Marcescens, And Symphyotrichum Rhiannon: Additional Serpentine Endemics From Eastern North America, T B. Harris, N Rajakaruna
Adiantum Viridimontanum, Aspidotis Densa, Minuartia Marcescens, And Symphyotrichum Rhiannon: Additional Serpentine Endemics From Eastern North America, T B. Harris, N Rajakaruna
Nishanta Rajakaruna
Serpentine outcrops around the world are known to harbor disproportionately high rates of plant endemism. Remarkable cases of serpentine endemism occur in New Caledonia and Cuba, with 3178 and 920 endemic taxa, respectively, found solely on serpentine. Despite the patchy occurrence of serpentine in eastern North America from Québec and Newfoundland south to Alabama, only one taxon, Cerastium velutinum var. villosissimum, has been broadly recognized as a serpentine endemic for the region. Based on reports in the literature, we suggest that Adiantum viridimontanum, Minuartia marcescens, and Symphyotrichum rhiannon be considered endemic to serpentine soils from the east coast of North …
Biology Of Ultramafic Rocks And Soils: Research Goals For The Future, R S. Boyd, A R. Kruckeberg, N Rajakaruna
Biology Of Ultramafic Rocks And Soils: Research Goals For The Future, R S. Boyd, A R. Kruckeberg, N Rajakaruna
Nishanta Rajakaruna
At this, the 6th International Conference on Serpentine Ecology, it seems timely to review briefly the present status of the field and to project the needs for future research. Although a great deal of serpentine research was done prior to 1960, as summarized by Krause (1958) and discussed briefly by Brooks (1987), much of our progress in learning how serpentine geology affects plant and animal life occurred in the mid- to late 20th century. In that era, it was the landmark studies of several scientists worldwide that initiated a meteoric increase in published serpentine research. Key players in setting the …
Advances In Serpentine Geoecology: A Retrospective, N Rajakaruna, R S. Boyd
Advances In Serpentine Geoecology: A Retrospective, N Rajakaruna, R S. Boyd
Nishanta Rajakaruna
No abstract provided.