Pathogenicity of the pine wood nematode, Bursaphelenchus xylophilus, to Japanese larch, Larix kaempferi, seedlings was tested with inoculation experiments under nursery conditions. Water suspensions of nematodes (mixed stages cultured on Botrytis cinerea or dispersal fourth-stage juveniles (DJ4) extracted from the adult Japanese pine sawyer, Monochamus alternatus) were injected into the stems o...

A study was conducted to determine the pathogens causing root rot, wilt and dieback disease of Cinnamomum cassia (Chinese cinnamon or cassia) in Vietnam, nurseries plantations Yen Bai, Quang Ninh, Thanh Hoa Nam provinces, streams Bai province. Pathogens were identified using morphology internal transcribed spacer (ITS) sequence analysis. The 204 isolates obtained included 125 Phytophthora 79 fr...

curves were measured seasonally in seedlings of white spruce (Picea glauca (Moench.) Voss) grown for two years in the understory of aspen (Populus tremuloides Michx.) or in the open in central Alberta. Light-saturated rate of net photosynthesis, the optimum temperature for net photosynthesis, transpiration rate, photochemical efficiency, and stomatal and mesophyll conductances increased from sp...

High-severity wildfire in arid regions has caused ecological state change, transforming previously forested areas into shrublands. This dramatically alters the microclimatic conditions, which can exceed climatic tolerance of tree seedlings, rendering likelihood returning post-wildlife landscapes to their previous relatively low. Characterizing variability across severely burned could allow for ...

Reclamation (revegetation) activities must be carried out upon the completion of mining. Limestone dust can affect physical, chemical, and biological properties soil. To increase growth rate non-wood product species such as coffee, fertilizers mycorrhiza are introduced to reclamation site. The goal this study is examine effects limestone covering former mines different doses mycorrhizal on coff...

When seeds of Echinochloa crusgalli var. oryzicola are germinated in dark anaerobic conditions (99.995% N(2)), the seedlings do not have detectable protochlorophyll(ide). Two hours after exposure to light aerobic conditions, they begin to synthesize chlorophyll. The lag in greening is shorter in seedlings exposed to light for 24 hours before exposure to air. Seedlings maintained in light anaero...

Micro-grafting and mini-grafting trials were carried out in order to obtain complete Pinus patula plants generated vitro, derived from the fact that formation of roots micro-propagated shoots is very low or null. On other hand, there possibility generating clones with outstanding genetic characteristics. P. seeds established aseptic conditions geminated vitro DCR medium; aerial part was dissect...

During anaerobic germination, rice produces a coleoptile devoid of carotenoid and chlorophyll. Further development and greening of the shoot occur upon exposure of the seedlings to air. In this study, a comparison was made between anaerobically (N(2)) germinated rice, greened upon exposure to air, and air/dark (A/D) germinated seedlings, greened upon exposure to light. After exposure to air, N(...

The effect and responses to drought stress were analyzed in Quercus ilex L. seedlings using a nontargeted metabolomic approach, implementing the approaches of previous studies which other -omics platforms, transcriptomics, proteomics employed. This work aimed characterize Q. leaf metabolome, determining possible mechanisms molecular markers tolerance identifying putative bioactive compounds. Si...

Trees critically affect the functioning of savanna ecosystems through their effects on nutrient cycling, water availability, and patterns of space use by wildlife. Therefore, whatever factors influence successful recruitment of tree seedlings are important filters controlling savanna ecosystem function. In African savannas, large mammals have been considered the most important agents of mortali...