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

... Original article Enzymatic polymorphism in natural populations of the sawfly Diprion pini L (Hymenoptera: Diprionidae) L Beaudoin JP Allais C Géri 1 1 Station de zoologie forestière, ... females and E2 males. The allele frequencies of the allozymes in the six french D pini populations are given in table I. The allelic frequen...

Ngày tải lên: 08/08/2014, 18:21

... ecological series with generally identical soil- forming processes (podzolization) and on the basis of different impacts of management. e currently minimized level of air-pollution load in the whole ... usu- ally inevitable. us soils with eluvial horizon Ep and illuvial diagnostic horizon Bs are formed (V, Š 2000). Intensive natural elution of ele- ments from...

Ngày tải lên: 07/08/2014, 03:22

... longitudinal shrinkage versus RGS shows a contin- uum in behaviour from the “normally” tensile stressed wood to the compression stressed wood. Inside the group of nor- mal wood samples (including ... several experi- mental and theoretical works showed that the increase in lon- gitudinal shrinkage from normal to compression wood is due to the increase of the MFA [18, 26], s...

Ngày tải lên: 07/08/2014, 16:20

... major soil types in which hybrid poplar clones are expected to be planted in southern Québec. All sites were originally abandoned agricultural land. Each clonal trial was estab- lished in a randomized ... thus separating from within-tree variation sources. The following mixed linear models were used for joint analyses of the four sites together and for separate analyses of indiv...

Ngày tải lên: 07/08/2014, 16:20

... two needle types, i.e. typhoon-generated and normally fallen needles. The two types of needles were collected with litter traps at the same plot dur- ing the peak fall in July 1997 (normal) and ... altitude of 130 m a.s .l. This Pinus luchuensis plantation was established in 1951. The detailed description of the sampling stand was given by Xu and Hirata [36]. The annual...

Ngày tải lên: 07/08/2014, 16:20

... halepensis seedlings formed dwarf shoots (level 6), while most were in level 5 and some remained in level 4. On the contrary, the relatively high score attained in P. pinea was exclusively due to the abundant ... (D) including the 16 populations studied. Labelling: Squares, Pinus pinaster; up triangles, P. halepensis; circles, P. canariensis and inverted triangles, P. pinea. D...

Ngày tải lên: 07/08/2014, 16:20

... to the thylakoid sta- bility [34, 35] although this point is still debated [26]. Low molecular weight heat shock proteins might also play the role of chaperonine protecting protein complexes of ... to the southern Alps at the end of the XIXth century; Cupressus sempervirens L. growing in the lowland close to the Mediter- ranean coast and Pinus halepensis Mill., pioneeri...

Ngày tải lên: 08/08/2014, 01:22

... the control of flowering is at least partially located within the bud. This control could be related to morphological or biochemical properties of certain com- ponents of ... development of the axillary buds depended upon their position on the shoot (Table II). The buds located at the base of the ramification developed essen- tially as...

Ngày tải lên: 09/08/2014, 04:20

... C0 2 -assimilation rate PN. The Rfd-values are an indicator of the intactness of the internal photosynthetic apparatus. Though they usually parallel the net C0 2 -assimilation rates, ... enables the determination of a further stress indicator: the ratio F690/F735 of the 2 fluorescence maxima. The height of F690/F735 mainly reflects the...

Ngày tải lên: 09/08/2014, 04:20

... frequency of allele i over all units of the next lowest hierarchical level. Val- ues of the genetic parameters were averaged over all loci analyzed. The structure of gene ... natural ranges were largely overlapping and 3) natural hybridization was indicated in the literature in all pairwise combinations. In defining a complex, we add...

Ngày tải lên: 08/08/2014, 19:21