Báo cáo lâm nghiệp: "Responses of photosynthesis and stomatal conductance to atmospheric humidity in some mediterranean Abies specie" ppt

... induced by abscisic acid in leaves having different mesophyll anatomies. Plant Cell Physiol. 29, 385-394 Responses of photosynthesis and stomatal conductance to atmospheric humidity ... diffusional and mesophyll photosynthetic processes in response to increasing Aw: Pinus pinea seedlings, having a leaf diffusional struc- (Cowan and Farquhar,...

Ngày tải lên: 09/08/2014, 04:20

... the stem of declining trees, it is common to observe occlusion of xylem vessels and darkening of the surronding parenchima (Vannini, 1990b; Vannini and Valentini, 1994). Oak ... located in a 40- year-old natural coppice of Q cerris, Q pubescens and Q frainetto, strongly affected by decline since 1989, in the district of Gravina, in Pug...

Ngày tải lên: 08/08/2014, 18:21

... not dif- ferent in control or either kind of resprout. The increased amount of carotenoids in resprouts contributed to providing protection from photoinhibitory processes. Quercus ... and leaf conductance to water vapor, were performed in situ in attached, fully expanded leaves of control plants and resprouts of burned and tree-felled...

Ngày tải lên: 08/08/2014, 18:21

... collection and processing of throughfall water were carried out according to K (2002). At four-week intervals, we also took totals of gravitational water from the soil depths of 0.10 and 25 ... e in uence of the cutting intervention on the water regime of plots was found less pronounced mainly in 1989 – probably due to the absorption effect of the herbal synus...

Ngày tải lên: 07/08/2014, 03:22

... February and March of the year in question. e standard tree-ring chronology shows an obvious decrease in radial increments starting at the beginning of the 1970s and ending at the end of the 1980s. ... precipitation in the pre- vious year and by precipitation in that particular year. Precipitation in spring of the previous year and precipitation in winter, sprin...

Ngày tải lên: 07/08/2014, 03:22

... Der Rhein und seine Auen – eine Bilanz. Berlin, Springer Verlag. WELANDER N.T., OTTOSSON B., 1998. e in uence of shading on growth and morphology in seedlings of Quercus robur L. and Fagus ... duration of inundation increases. – Inundation during the vegetation period results in leaf abscission and necrosis of the shoot. – Mortality of seedlings increases as the dur...

Ngày tải lên: 07/08/2014, 03:22

... and layout of cells in the growing rings.  e range of juvenile wood is usually defi ned using the number of rings. However, there is no unifi ed opinion concerning the number of rings of juvenile ... produced in compliance with valid norms for the de- termination of density.  e samples were taken in the zone close to the central part of the stem (JW) and in t...

Ngày tải lên: 07/08/2014, 10:21

... in size). One of the objectives was to investigate the in uence of specifi c sorting in a forest nursery on the growth and stability of out- plantings of Norway spruce mountain populations. ... strength, which may lead to a decrease in longevity. Diff erent criteria of the sorting of seedlings and plants should be used in the production of planting stock for h...

Ngày tải lên: 07/08/2014, 10:21

... significant increase in radial increment of Norway spruce in Austria in the period of 1961 to 1990, during which the length of growing season increased by 11 days associated with the increase in mean ... of mixed stands was insufficient and why it was not proved to satisfaction if tree species grew better in mixed stands or in pure stands. Recent findings show that...

Ngày tải lên: 07/08/2014, 10:21

... related to the daily and seasonal fluctuation of photosynthesis, plant growth and dynamics of stands (C et al. 1994). e values of Fo (minimum fluorescence at all re- action centres of photosystem ... values obtained by measurement of rapid changes in fluorescence after the illumination of needle samples adapted to darkness illustrate the state and integrity of...

Ngày tải lên: 07/08/2014, 10:22