Báo cáo lâm nghiệp: "Leaf number, water stress and carbon nutrition effects poplar leaf growth on" pps

... of the mean leaf area was observed. Water stress effect Reduction of watering provoked water stress. Leaf growth was inhibited until rewatering. The final leaf size was ... expansive growth of leaf cells (Cleland, 1971) and that water stress reduces the final size of the epidermal cells (McCree and Davies, 1974). The present results...

Ngày tải lên: 09/08/2014, 04:20

... lower growth under water stress. Pitman and Cram (1977) found that the rate of K+ export from the root to the shoot in barley seedlings was proportional to the relative growth ... 32, 1257-1272 Kramer J.P. (1980) Drought, stress and the ori- gin of adaptations. In: Adaptation of Plants to Water and High Temperature Stress. (Turner N.C....

Ngày tải lên: 09/08/2014, 04:20

... Relationships between minimum leaf water potential ( Ψ min ), predawn leaf water potential (Ψ pd ), maximum diurnal leaf water potential drop ( ∆Ψ = Ψ pd – Ψ min ) and Water Stress Impact on Species ... study photosynthesis, carbon budgets and water balance [16, 41, 46, 54]. 2.3. Field measurements of g L , Ψ L and RWC Leaf conductance to water vapour (g L ), wa...

Ngày tải lên: 09/08/2014, 04:20

... RESULTS 3.1. Growth, chlorophyll content, and shoot dieback In the two species, main stem and total root biomass growth stopped within the first week after water- logging while both root and shoot growth ... to water- logging and associated root hypoxia: effects on water rela- tions and photosynthesis, Ann. Sci. For. 51 (1994) 417–429. [23] Dreyer E., Colin-Belgrand M., Biron...

Ngày tải lên: 07/08/2014, 16:20

... mm at Areas and 14.6 ◦ C and 158 mm at Sergude, respectively. One hundred and fifty-five plus trees, selected for growth and form within natural stands from North Spain, were grafted and planted ... The environmental variation among years and/ or sites (namely weather and water and nutrient availabil- ities) affects both the disease expansion and severity and the plant phy...

Ngày tải lên: 07/08/2014, 16:20

... and A maxm ), leaf thickness and density The correlations between A maxm , A maxa and leaf density and thickness are presented in Table V. A maxa was strongly and pos- itively related to leaf ... condi- tions differ in leaf gas exchange regulation, carbon isotope discri- mination and leaf water potential, Oecologia 99 (1984) 297–305. [39] Kincaid D.T., Anderson P.J...

Ngày tải lên: 08/08/2014, 00:22

... on leaf density thickness in deciduous woody plants grown in sun and shade, Plant Physiol. 72 (1983) 678–674. [22] Minotta G., Pinzauti S., Effects of light and soil fertility on growth, leaf ... Reich P.B., Walters M.B., Ellsworth D.S., Leaf age and season influence the relation between leaf nitrogen, leaf mass per area and photosynthesis in maple and oak trees, Plant...

Ngày tải lên: 08/08/2014, 01:21

... of land abandonment. Acknowledgements: We thank René Jouvie, Fabrice Landré and André Marquier for their valuable technical help in the field. This research was funded by the Auvergne Region and ... dicotyledon species. 3.3.2. Beech seedlings leaf water potentials Beech seedling predawn leaf water potential varied during the growing season and ranged between –0.17 and –0.62 MP...

Ngày tải lên: 08/08/2014, 01:21

... directly links the water losses, and therefore the stomatal aperture, to soil and leaf water deficits. The greater the water flow, the greater the water tension devel- oped ... damage is that both high water loss and soil drought induce leaf water deficits. This results from the mechanism of water movement in plants. Water moves fro...

Ngày tải lên: 08/08/2014, 18:21

... mineral uptake. In addition, the kinds and quantities of growth- regulating compounds are altered and have a variety of effects on growth and metabolism. Although many changes ... of stress on dis- ease of nursery and landscape plants. J Arbor 4, 217-225 Schoeneweiss DF (1981 a) Infectious diseases of trees associated with water and freezin...

Ngày tải lên: 08/08/2014, 18:21