Báo cáo lâm nghiệp: "Experimental control in Weigela japonica of flower initiatiob" ppt

... respond to a treatmentpromoting flowering. These observationssuggest that the control of flowering is atleast partially located within the bud. This control could be related ... Vegetative vigor control overlocation and fate of flower buds in fruit trees.Acta Hortic. 149, 55-63Jackson D.J. & Sweet G.B. (1972) Flower initia-tion in temperate woody ... The control of floral evocationand morphogenesis. Annu. Rev. Plant Physiol.39. 175-219 9Buban T. & Faust M. (1982) Flower bud induc-tion in apple trees: internal control...

Báo cáo lâm nghiệp: "Experimental research in ageing holm oak (Quercus ilex L.) coppices: preliminary results" ppsx

... of theseedlings took place chiefly in the year of cutting and during the first vegetative sea-son of the coppice. The number of seedlings emerging in the course of ... seedlingsand whether any of the seedlings noted in thefirst sampling had died. The location of eachseedling in the concentric plots was related tothe projection of the ... diameter in mm andheight in cm) were measured on all theseedlings present in the transects and in theconcentric plots. In the course of the secondsampling (November...

Báo cáo lâm nghiệp: "Compression stress in opposite wood of angiosperms: observations in chestnut, mani and poplar" ppsx

... (Populuseuramericana Guinier). Diameters at breast height were respectively15 cm, 20 cm and 25 cm. Chestnuts were growing in a private forest in south of France, mani in a tropical rainforest in French Guyana(South ... poplar in Kyoto university experimental forest(Japan). Experiments on mani and chestnut involved measurements of RGS and longitudinal drying shrinkage, and were presented in de-tails in previous ... fromthe results of our study from a biomechanical point of view. In- deed, the biomechanical mechanism of Buxus and Pseudowin-tera is completely similar to that of gymnosperms, producingCW with...

Báo cáo lâm nghiệp: "Age trends in genotypic variation of wood density and its intra-ring components in young poplar hybrid crosses" doc

... planted in row plots, each containing four trees. Onesystematic thinning was carried out (by removing every second tree in a row) in 1995 at the Platon site and in 1996 at the Windsor andSaint-Ours ... density of indi-vidual rings. However, for wood density of cumulated rings,the repeatability showed a steady increase starting from 3 to5 years of age at most of the sites. The increase of repeatabilitywas ... variation within trees.This presumption must be veriﬁed in future studies.The mean wood density of a ring is a composite of severalintra-ring components, including wood density of early- andlatewood...

Báo cáo lâm nghiệp: "Nutrient dynamics in decomposing needles of Pinus luchuensis after typhoon disturbance in a subtropical environment" pps

... the pattern of nutrient release in decomposing pine needles resulting by typhoon disturbance in comparison with the normally fallen needles, to improve ourunderstanding of the impact of typhoon ... Japan [14]. Luchu pine was introduced tothe Bonin Islands and some national forests in Kyushu, andwas also introduced to Taiwan [39]. In Okinawa, Luchu pine* Corresponding author: xnxu61@yahoo.com.cnis ... tropi-cal regions of East Asia. In Japan, the secondary pine forestsare composed of Japanese red pine (Pinus densiﬂora Sieb. etZucc.), Japanese black pine (P. thunbergii Parl.), and Luchupine (P. luchuensis...

Báo cáo lâm nghiệp: "New insights in the recognition of the European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl as useful tools for forest management" pdf

... respectively) with Primer3 software [22]. PreliminaryPCR tests were performed with 10 individuals of each species in 20 µlsolution containing 0.5 units of Q-BIOgene Taq DNA Pol, 100 µMofeach dNTP, 1.5 ... ﬁrst measure of the underdevelopment of the embryo, and this character isknown to be involved in germination ability and evolution of seed dormancy [1,2,12]. Thus, multiple tests including physio-logical ... some germinations were observedand E:S ratios were intermediate, indicating the presence of F.angustifolia-like genotypes. Indeed, this population has beenshown to be mainly composed of morphologically...

Báo cáo lâm nghiệp: "Enzymatic polymorphism in natural populations of the sawfly Diprion pini L (Hymenoptera: Diprionidae) L Beaudoin" ppsx

... populations in mountain areas cohabit, all living in forests located at varying distances from each other. The char-acteristics of the diapause of mountain populations ... methodologic point of view, the study shows a reduced enzymaticpolymorphism of D pini and illustrates thedifficulty in using enzymatic electrophore-sis to investigate D pini population ... and leucine amino-peptidase were investi-gated.The analysis of 583 males and 1 174 femalesgrouped according to their origin was performed,colony by colony, using polyacrylamide...

Báo cáo lâm nghiệp: "Seasonal variations in photosynthetic activity of spruces as determined by chlorophyll fluorescence" ppsx

... In contrast, the qE-values (energyquenching), which contain information,e.g., of the light-mediated formation of a proton gradient across the mem-brane, were higher in ... activity of leavesas is demonstrated by parallel measure-ments of the net C02-assimilation rate PN.The Rfd-values are an indicator of theintactness of the internal ... Lichtenthalerand Rinderle, 1988) permits a fast screen-ing of seasonal and short-term variationstosynthetic activity, e.g., in springtime(values of 0.35-0.45).The ratio of the chlorophyll...

Báo cáo lâm nghiệp: " Genetic control of the time of transition from juvenile to mature wood in Pinus radiata D. Don" pdf

... quality in radiata pine, an understanding of the geneticvariability of transition age is critical. Few studies have ex-amined the genetic mechanisms in uencing transition age in fast growing pines. ... reported in- dividual tree narrow-sense heritability of 0.12 for ring densitytransition age in loblolly pine.3.4. Prediction of breeding valuesPredicted genetic gains, estimated using individual ... time of latewood transition at family and in- dividual tree level does help to explain diﬀerences in percentlatewood and density in fast growing radiata pine trees [28].3.3. Genetic control of...

Báo cáo lâm nghiệp: "Parental participation in progeny and eﬀective population sizes in experimental seed orchards of wild cherry Prunus avium L. (Batsch)" docx

... introduction of whole plants and (2) the second onewith a delayed introduction of half of the individuals, the latestclones being installed before the earliest ones with the aim of increasing ... effective size remained stable in seed orchard #2.For the male function, considering the information providedby co-flowering time on top of the number of flowers led toobserve a diminution of the effective ... of 0.5, 0.1 and 1.3respectively in seed orchards #1, #2 and #3. Considering thepollination success obtained with the paternity analysis instead of the number of flowers led to observe a diminution...

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