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Abstract. The effects of cold-induced photoinhibition on Eucalyptus globulus and Eucalyptus nitens seedlings were assessed between planting and age 23weeks. The seedlings were subjected to four treatments before planting: non-hardened (NH) E. globulus and E. nitens, cold-hardened (CH) E. nitens, and nutrient-starved (NS) E. nitens. Seedlings were planted alongside established 1-year-old E. nitens...
Abstract. Main shoot and sylleptic shoot growth characteristics were measured during and after the first year of growth of 255 Telamon x Braeburn apple seedlings. Although mean main shoot growth characteristics between branched and non-branched trees were significantly different, many non-branched trees expressed similar main shoot growth to branched trees. The variables describing length, number...
The physiological capacities of seedlings to cope with drought may be subject to strong selective pressure in the context of future climate scenarios, threatening the regeneration and sustainability of forests. Characterization of the responses and the variability between species is of interest to breeding and domestication programs. In this study, our main goal was to describe some of the physiological...
Somatic embryogenesis (SE) has been achieved from hypocotyl-derived callus culture in Pterocarpus marsupium. Ninety percent of hypocotyl explants (excised from 12-day-old in vitro germinated axenic seedlings) produced callus on Murashige and Skoog medium supplemented with 5 μM 2,4-dichlorophenoxyacetic acid and 1 μM a 6-benzyladenine (BA). Induction of SE occurred after transfer of callus clumps (200 ± 20 mg...
Forest ecosystems exert a large influence on the hydrologic cycle through transpiration, with the majority supplied by saplings and adult trees. However, a measurable amount is also supplied by seedlings. The contribution of seedlings is dependent upon species, which is ultimately controlled by microclimate. The objectives of this study were to (1) observe meteorological conditions of two forest microclimates;...
We assessed growth differences and the foliar traits underpinning production in paired samples of juvenile American beech (Fagus grandifolia Ehrh.) that originated from seed versus root sprouts. Root sprouts had significantly greater relative extension growth rate and slightly greater leaf mass per unit area compared to seed-derived individuals, but neither light-saturated net photosynthetic rate...
There has been growing recent interest in the adaptations of tree species to seedling establishment in active northern temperate floodplains. In the case of Populus and Salix, most or all of the recent papers overlook a scattered, earlier literature showing that, in many Populus and Salix species, just after germination, the collet produces prominent hairs which, in young seedlings, may play an important...
Key messageCell wall polysaccharidic composition changed between cotyledons, hypocotyls and roots. Neither thelaurinamutation nor the presence of light had an impact on this composition. Abstract Coffea arabica ‘Laurina’, a natural mutant of Coffea arabica ‘Bourbon’ (B), is also known as ‘Bourbon Pointu’ (BP). In...
Key message Norway spruce seedlings apparently showing a relatively higher tolerance to drought can be easily selected using a battery of biomarkers such as water content, chlorophyll, and proline levels in the needles, and could be eventually used as an initial screening method in reforestation programmes. Abstract Norway spruce is a native European coniferous species distributed from the Carpathian...
Key message This study highlighted the consistency of a functional scheme integrating leaf, stem and root traits, biomass allocation and stem anatomy for 15 tropical tree species at the seedling stage. This functional scheme was shaped by the trade-offs for resource use and the hydraulics of the plants and was found to determine seedling growth. Abstract Functional traits determine plant functioning,...
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