standard errors of five measurements. The same letters above column bars within species represent no significance between/among treatments as determined by Tukey’s method for multiplicity at α = 0.05. Arctostaphylos uva-ursi and Cercocarpus montanus
Abstract
Rooted cuttings of Anthemis nobilis, Arctostaphylos uva-ursi; Veronica officinalis and Houttuynia cordata were grown in the greenhouse and in nutrient solutions differing only in pH. The levels of pH were adjusted to 3 to 9 for A. nobilis and A. uva-ursi, to pH 4 to 9 for V. officinalis and to pH 4 to 6 for H. cordata. A. nobilis grew well at pH 4 to 7 but best growth was near pH 5. Arctostaphylos uva-ursi made best growth at pH 4 but not significantly better than at pH 5 to 7. V. officinalis grew well over a wide pH range (4 to 7 inclusive) and plants died gradually at pH 9. For the H. cordata trial a limited number of plants was available and at the imposed pH levels (4, 5 and 6) all plants grew uniformly and well.
Abstract
When inoculum of ectomycorrhizal fungi was added to the rooting medium, the percentage of rooted cuttings and the root volumes on cuttings of bearberry (Arctostaphylos uva-ursi L. Spreng.) and huckleberry (Vaccinium ovatum Parsh) were significantly greater than those of the uninoculated controls. This enhanced rooting occurred before or in the absence of any mycorrhizal association. In some tests, inoculum of one fungus enhanced rooting of one cultivar of bearberry, but not another, suggesting a specific interaction between the cultivar and the fungus. Of the 13 fungi tested, only Thelephora terrestris Ehrh. ex Fr. formed ectendomycorrhizae in the propagation bed, although several others did so under other conditions.
To examine injuries caused by freezing temperature, six woody plants were placed under temperatures ranging from 0 to 20C. Control plants were placed at 0 or –2C, depending on the field sampling period. Freezing tests were done three times (September, October, and November) during the fall. In 1992, six species were tested: Genista tinctoria `Lydia', Parthenocissus `Veitchii', Weigela × florida `Variegata', Spiraea japonica `Shirobana', Spiraea japonica `Coccinea', and Arctostaphylos uva-ursi. After testing, all plants were stored at –2C for the remainder of the winter. The following May, plants were repotted into containers. Effects of freezing temperatures on plant growth were recorded at the end of the following summer. Preliminary results indicate that the most sensitive species to cold temperatures were Parthenocissus `Veitchii' and Arctostaphylos uvaursi. Plants of these two species did not survive the summer. However, for the third sampling period, Parthenocissus `Veitchii' (–18C) had better cold hardiness than A. uva-ursi (–9.5C). Genista tinctoria `Lydia' appeared to have the same cold hardiness (–10C) for the three sampling periods. The last three species had shown increasing cold hardiness beginning at around –8C in September to about –18C in November.
Hardwood cuttings of kinnikinnick (Arctostaphylos uva-ursi `Massachusetts') were inoculated with three different types of inoculum of mycorrhizal fungi to determine whether addition of mycorrhizal inoculum into the rooting substrate during cutting propagation increases rooting or root growth, or alters the time for rooting. Cuttings, treated or untreated with rooting hormone prior to sticking into the rooting substrate, were inoculated with either inoculum of an arbuscular mycorrhizal fungus (AMF), hyphal inoculum of an arbutoid mycorrhizal fungus (E), or inoculum consisting of colonized root fragments of kinnikinnick (R). Cuttings were placed under mist in a greenhouse with no bottom heat and harvested 35, 56, and 84 days after sticking. Using AMF inoculum in the rooting substrate did not enhance rooting of cuttings, while adding the R or E inoculum to the rooting substrate increased root initiation compared to non-inoculated cuttings. Cuttings inoculated with either the R or E inoculum had greater root initiation than non-inoculated cuttings 56 and 84 days after sticking. When treated with rooting hormone, cuttings inoculated with the E or R inoculum had longer roots and a greater root biomass than non-inoculated cuttings. Mycorrhizal colonization of roots was similar or greater when cuttings were inoculated with the E inoculum than with the R inoculum and application of rooting hormone generally increased root colonization. The use of inoculum composed of root fragments from kinnikinnick during cutting propagation does not appear to be more beneficial than use of hyphal inoculum from a known arbutoid mycorrhizal fungus.
weight and root initiation in a range of plant species, including dwarf umbrella tree ( Schefflera arboricola ), anglojap yew ( Taxus × media ), rose ( Rosa ‘Scarlet Cupido’), bearberry ( Arctostaphylos uva-ursi ), geranium ( Pelargonium sp.), malabar
. 2006b Winter acclimation of PsbS and related proteins in the evergreen Arctostaphylos uva-ursi as influenced by altitude and light environment Plant Cell Environ. 29 869 878
EC of 10.0 dS·m −1 . In another study by Paudel and Sun (2023) on Arctostaphylos uva-ursi (kinnikinnick), plants exposed to an EC 10.0 dS·m −1 saline solution exhibited Na + content as high as 8.3 mg·g −1 , 35 times greater than the plants
Orthosiphon stamineus Benth, Hieracium pilosella L., Sambucus nigra L. and Arctostaphylos uva-ursi (L.) Spreng. in rats Phytother. Res. 13 3 222 225 Behe, B.K. 2006 Conjoint analysis reveals consumers prefer long, thin asparagus spears HortScience 41 5