Báo cáo lâm nghiệp: "Limitation of photosynthetic activity by CO 2 availability in the chloroplasts of oak leaves from different species and during drought" pdf

... deviation from linearity, con- firming that even under stress conditions, Original article Limitation of photosynthetic activity by CO 2 availability in the chloroplasts of oak leaves ... availability in the chloroplasts. Finally, the CO 2 availability decreased with increasing drought in the soil, stressing the importance of...

Ngày tải lên: 08/08/2014, 18:21

... (m/ha) 30 24 18 12 6 0 1 2b 4 6 8 10 12 14 15b 17 19 21 23 25 27 29 31 33 35 37 39 41 2a 3 5 7 9 11 13 15a 16 18 20 22 24 26 28 30 32 34 36 38 40 80 J. FOR. SCI., 54, 20 08 (2) : 73–83 RESULTS One of the ... morphological conditions of the Czech Republic. According to the Management Forest Institute the optimal density of forest transport roads is 15 m/ha...

Ngày tải lên: 07/08/2014, 10:21

... PPFD became probably saturating at a Ψ m lower than 2. 5 MPa, producing the increase of NPQ in N. dombeyi and the concomitant decrease in Fv/Fm, ∆F/Fm  and qP. In conclusion, this study provides ... at the Universidad Austral, Valdivia, Chile. During June 20 04, 100 two-three years old seedlings of N. dombeyi and N. nitida were collected from semi-shade in secon...

Ngày tải lên: 07/08/2014, 16:21

... effect of GA and cold in the case of argan seed germination. From the results of this study, dormancy can be broken using GA or cold storage, but the presence of GA appears to speed up germination ... germination avoiding long exposure of the seeds to contamination. This probably has to do with the fra- gility of the argan nut contained within the slightly crac...

Ngày tải lên: 08/08/2014, 01:22

... within the guide curve method [25 27 , 41, 47, 51]. All of these studies together covered the three main areas of dis- tribution of the species in Spain: the Sistema Central Moun- tains, the Sistema ... re-measured in the winter of 20 03. These plots were selected for developing a dynamic growth model for the species in the area of study, thus the initia...

Ngày tải lên: 08/08/2014, 00:21

... ranged from 140 to 28 0 µm in all of the good acoustic woods and from 60 to 160 µm in the poor acoustic woods. The vessel frequency/mm 2 ranged from 2 to 8 (up to 18 in Commi- phora) in the “good” ... growth rings, with the ring parallel to the tangential grain of the wood. The longitudinal direction was colinear to the longitudinal axis of the s...

Ngày tải lên: 08/08/2014, 00:22

... 26 2 659.08 314.91 328 .59 868.79 lgg 0.00 1991 26 2 488.38 3 02. 61 300.60 754.70 glg 0.00 19 92 2 62 374.14 28 3 .24 27 6 .24 680.97 glg 0.00 1993 22 4 318. 82 258. 32 255.33 624 .23 glg 0.00 1994 22 4 3 12. 94 ... 3 12. 94 27 5 .25 27 5.47 540 .23 lgg or glg 0.00 1995 22 4 28 1.15 26 1.65 26 1 .22 518.56 ggg 0.69 1996 22 4 29 6.93 27 7.50 27 5.50 623 .85 ggg 0.60 1997...

Ngày tải lên: 08/08/2014, 01:21

... dehesas in the Iberian Peninsula and one of the most important forest species occurring in Por- tugal. The most striking feature of these oak stands is their savanna-like structure. ... studied. We investigated the variation of stom- atal conductance within the crown of a cork -oak (Q suber L), by studying its diurnal and season...

Ngày tải lên: 08/08/2014, 18:21

... 03 or S0 2 could lead to H2 02 production (Tingey and Taylor, 19 82; Khan and Malhotra, 19 82) . In order to protect the plasma membrane and the compo- nents of the extracellular ... exposure, the decreased extracellular enzyme activity and the increased protein content in the IWF of young needles could be explained by the h...

Ngày tải lên: 09/08/2014, 04:20

... other coniferous species in copper- or boron-deficiency conditions. The similarity of the symptoms and the very low trace-element contents in these sandy acid soils were consistent ... in February 1987 from 10 trees for each treatment. Adult pines (24 yr old) 2 treatments were replicated 3 times in a randomized bloc: control and 22...

Ngày tải lên: 09/08/2014, 04:20