Soil influences on plant growth, floral density and nectar yield in three cultivars of mānuka (Leptospermum scoparium)

Abstract

S 4: Averaged data is displayed for plant response parameters for Cultivar Y: Plant height (HT), Relative Growth Rate (RGR) is the average change in basal stem diameter per month over the length of the experiment, Basal Stem diameter (BS), seed capsule numbers (Mean Caps). Results from a Tukey Comparison of means at the 95.0% confidence level are displayed in the columns next to the parameter value, means that do not share a letter are significantly different. Plant growth parameters are those measured at the end of the experiment. SC = soil code. Parameters values are listed from the highest to lowest inn each column with the relevant soil code listed alongside.

Influence of genotype, floral stage, and water stress on floral nectar yield and composition of mānuka (Leptospermum scoparium)

“…Despite a large industry developing around the unique properties of mānuka honey, little is known about the controls on nectar flow and composition in this species. Surveys of nectar composition from both wild and cultivated mānuka have revealed significant variation in both total nectar sugar amount per flower, and the ratio of DHA to the major sugars ( Williams et al , 2014 ; Nickless et al , 2017 ), but the cause of this variation and the origin of the nectar DHA both remain unknown.…”

WITHDRAWN: Development of a robust method for propagation of Leptospermum scoparium J.R.Forst. & G.Forst. from semi-hardwood cuttings

“…However, to determine if the qualities of elite lines are reliably maintained beyond cutting propagation, further eld testing is necessary. Research on the species suggests that DHA:Tsugar levels in the nectar are maintained through clonal propagation (2) but slight variations in concentrations occur depending on the environment, soil and year (2,9).…”

“…& G.Forst. is native to Australia and New Zealand where local industries are establishing plantations for the production of bioactive honey (1)(2)(3)(4). Leptospermum scoparium (Manuka) honey has non-hydroxide antibacterial properties largely due to the presence of methylglyoxal (MGO) (5).…”

“…To ensure economical production of high quality bioactive honey, plantations should focus on using plant selections with high levels of DHA:Tsugar, excellent ower production and high nectar ow (2,8,10). Williams,King (9) and Williams,Pappalardo (8) found the production of DHA to total sugars to be variable within and across both wild and cultivated populations of L. scoparium in New Zealand and Australia.…”

Niches and radiations: a case study on the Andean sapphire‐vented puffleg Eriocnemis luciani and coppery‐naped puffleg E. sapphiropygia (Aves, Trochilidae)

“…We assessed specific ornithological gazetteers (Stephens and Traylor 1983, Paynter 1993 and the above cited publications to Table 1. For example, bird assemblages composition can respond to soil variations (Myers et al 2015), and it is reasonable to expect that such an influence is strong in nectarivorous birds, since soil characteristics have an effect not only on both the yield and sugar concentration of nectar (Kenoyer 1917, Shuel and Shivas 1953, Robacker et al 1983, Farkas et al 2012, Nickless et al 2017) but also on floral traits (Paiaro et al 2012), shaping the plant-pollinator interactions (Meindl et al 2013), and even constituting an important evolutionary force for plants , Yost et al 2012, Rajakaruna 2018). 1.2), which has proven to have better predictive power than other data with regards to precipitation patterns in mountainous areas (Karger et al 2017), for the tropical Andes.…”