Publications by authors named "Margareta Welander"
Article Synopsis
- The study focused on understanding how adventitious roots (AR) form in stems compared to hypocotyls, aiming to improve vegetative propagation in crops.
- Various methods, including anatomy observations and gene expression analysis, were used to develop a rooting protocol and trace AR origins in Arabidopsis thaliana stems.
- Key findings revealed that while AR formation occurs in both hypocotyls and stems, it is slower in stems and primarily originates from specific cells, with some genes showing delayed expression in stems compared to hypocotyls.
Article Synopsis
- Despite the rise in GM annual crop cultivation, commercial GM fruit trees remain rare due to their long development time and growth cycles.
- This study investigated three rolB transgenic dwarfing apple rootstocks, assessing their impact on non-transgenic apple scion cultivars under natural conditions.
- Results indicated that rolB rootstocks reduced tree height and overall growth but did not significantly affect fruit quality, suggesting potential uses in producing dwarf fruit trees or bonsai plants.
The rolA gene encoded on the Ri plasmid of Agrobacterium rhizogenes causes developmental alterations, including dwarfing characteristics in the transgenic plants. In an attempt to introduce dwarfing characteristics into apple rootstocks for breeding purposes, the rolA gene was incorporated into the apple rootstock M26 and obtained four transgenic clones. All the clones exhibited reduced growth compared to untransformed control plants but different degree of dwarfing and wrinkled leaves.
View Article and Find Full Text PDFAdventitious root formation in Malus 'Jork 9' stem discs was studied through temporarily blocking DNA synthesis by application of aphidicolin (AD). Higher number of roots per disc (8.4) after 21 days of cultivation were formed after a 24-h pulse of 15 microM AD, compared to control without AD application (6.
View Article and Find Full Text PDFBacterial and fungal contaminants of enset (Ensete ventricosum) cultures and microbes associated with surface-sterilized field material were identified by 16S/26S rDNA sequencing. Ten bacterial species were identified in 16 isolates from in vitro cultures and seven in 10 isolates from field clones. Three yeast species and one filamentous fungus were recorded as in vitro contaminants, whereas five yeast species were isolated from the field material.
View Article and Find Full Text PDFThe expression of two CTR-gene homologues was investigated during flower senescence in two Rosa hybrida cultivars. A fragment of a gene for a protein kinase, termed RhCTR1 (GenBank Acc. No.
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