| enhanced nitrogen deposition exacerbates the negative effect of increasing background ozone in dactylis glomerata, but not ranunculus acris. | the combined impacts of simulated increased nitrogen (n) deposition (75kgnha(-1)yr(-1)) and increasing background ozone (o(3)) were studied using two mesotrophic grassland species (dactylis glomerata and ranunculus acris) in solardomes, by means of eight o(3) treatments ranging from 15.5ppb to 92.7ppb (24h average mean). a-c(i) curves were constructed for each species to gauge effects on photosynthetic efficiency and capacity, and effects on biomass partitioning were determined after 14 weeks. i ... | 2011 | 21741736 |
| mycorrhizal benefit in two low arctic herbs increases with increasing temperature. | climate change may influence the relationship between arctic plants and their symbiotic mycorrhizal fungi. the benefit of the symbiosis for the host plant affects vegetation succession and may be a key parameter in predicting vegetation responses to warming. we investigated the mycorrhizal benefit in the low arctic perennial herbs potentilla crantzii and ranunculus acris in symbiosis with the arbuscular mycorrhizal fungus glomus claroideum. temperature response in the mycorrhiza-mediated acquisi ... | 2007 | 21636497 |
| relationships between the floral neighborhood and individual pollen limitation in two self-incompatible herbs. | local flower density can affect pollen limitation and plant reproductive success through changes in pollinator visitation and availability of compatible pollen. many studies have investigated the relationship between conspecific density and pollen limitation among populations, but less is known about within-population relationships and the effect of heterospecific flower density. in addition, few studies have explicitly assessed how the spatial scales at which flowers are monitored affect relati ... | 2009 | 19415338 |
| cytological and morphological investigations on gynodimorphic and normal forms of ranunculus acris l. | | 1927 | 17246515 |
| effect of mecoprop drift on some plant species of conservation interest when grown in standardized mixtures in microcosms. | there has been an increasing awareness of potential impacts of herbicide drift on to vegetation in nature reserves and field margin habitats adjacent to treated areas. previous work using single species bioassays has suggested that the effects of a single drift event are confined close to the sprayer (< 10 m). in the present study eight native dicotyledonous species, with and without a perennial grass (lolium perenne), were grown in standardized microcosms in order to study (1) the effects of he ... | 1991 | 15092089 |
| genetic diversity of ranunculus acris l. (ranunculaceae) populations in relation to species diversity and habitat type in grassland communities. | correlates between genetic diversity at intra- and interpopulation levels and the species diversity in plant communities are rarely investigated. such correlates may give insights into the effect of local selective forces across different communities on the genetic diversity of local plant populations. this study has employed amplified fragment length polymorphism to assess the genetic diversity within and between 10 populations of ranunculus acris in relation to the species diversity (richness ... | 2004 | 15078460 |
| [studies on the l-forms of bacteria. i. water distillates of ranunculus acer as factors for morphological changes in vitro in various bacteria]. | | 1959 | 13855099 |
| seasonality of root fungal colonization in low-alpine herbs. | arbuscular mycorrhizal (am) and dark septate endophytic (dse) fungal colonization of alchemilla glomerulans, carex vaginata, ranunculus acris ssp. pumilus and trollius europaeus growing in low-alpine meadows in the finnish subarctic were studied at different times during the growing season. fungal colonization was correlated to soil soluble phosphorus (p) concentration. the influence of flower bud removal on fungal colonization was investigated in a. glomerulans, c. vaginata and r. acris and the ... | 2002 | 11968944 |
| a pathway for biosynthesis of divinyl ether fatty acids in green leaves. | [1-14c]alpha-linolenic acid was incubated with a particulate fraction of homogenate of leaves of the meadow buttercup (ranunculus acris l.). the main product was a divinyl ether fatty acid, which was identified as 12-[1'(z),3'(z)-hexadienyloxy]-9(z),11(e)-dodecadienoic acid. addition of glutathione peroxidase and reduced glutathione to incubations of alpha-linolenic acid almost completely suppressed formation of the divinyl ether acid and resulted in the appearance of 13(s)-hydroxy-9(z), 11(e),1 ... | 1998 | 9870900 |
| light and electron microscopic investigation of in vitro starch synthesis in chromoplasts. | chromoplasts having a globular inner structure in the petals of forsythia suspensa can form starch grains in their stroma when incubated with glucose solution. the same result was obtained with chromoplasts, similar in structure, from laburnum anagyroides and ranunculus acer. fibrillar chromoplasts in tepals of lilium croceum are able to synthesize starch in vitro, not, however, from glucose but from glucose-1-phosphate. this starch differs from the above mentioned both in respect of electron mi ... | 1979 | 552307 |