Published in Plant and Soil
We studied the response of Scots pine (Pinus sylvestris L.) to supplementary far-red sidelight in seedlings grown in a forest soil substrate without additional nutrient supply. Our aim was to determine possible changes in the accumulation and allocation of dry weight and mineral nutrients and the presence of mycorrhizas. Half of the seedlings were ...
Published in Plant and Soil
A simulation model was used to investigate the effect of an increased rate of plant photosynthesis at enhanced atmospheric CO2 concentration on a non-leguminous plant-mycorrhizal fungus association. The model allowed the user to modify carbon allocation patterns at three levels: (1) within the plant (shoot–root), (2) between the plant and the mycor...
Published in Plant and Soil
The effects of supplementary far-red sidelight on the formation of mycorrhizas and on the accumulation and allocation of dry weight and mineral nutrients were studied in Scots pine (Pinus sylvestris L.) seedlings. Starting one week after germination the seedlings were subjected to two different light quality regimes: control and simulated sparse-ca...
Research on natural regeneration of Dipterocarpaceae is described. Work in greenhouse experiments, in planting experiments in natural forests and from monitoring of natural regeneration in undisturbed natural forest are discussed. In addition work on photosynthesis measurements is discussed. The findings show that survival of dipterocarp seedlings ...
Removal of litter and humus layers and herb vegetation dominated by the grass Deschampsia flexuosa ("sod-cutting") in Scots pine (Pinus sylvestris) stands enhanced numbers of species and sporocarps of ectomycorrhizal fungi, particularly in middle-aged and old stands. Three and a half years after sod-cutting soil conditions and the ectomycorrhizal f...
Published in The New phytologist
The symbiotic establishment of mycorrhizal fungi on plant roots is affected in various ways by the other microorganisms of the rhizosphere, and more especially by bacteria. This review discusses the case of some of these bacteria which consistently promote mycorrhizal development, leading to the concept of 'mycorrhization' helper bacteria (MHBs). E...
Published in The New phytologist
The spatial distribution of genets in the ectomycorrhizal fungus Suillus bovinus (L.: Fr.) Roussel were studied in somatic incompatibility pairings of isolates from five Scots pine (Pinus sylvestris L.) stands differing in forest history and age, With increasing forest age, the size of genets increased while the number of genets and production of s...
Report on research on the relationship of VAM-fungi and earthworms with the uptake of phosphate by plants. Results are presented of the phosphate concentration in soil and plants cultivated in different manured soils, with or without earthworms, at the biological farm NZ 27 in Zeewolde, The Netherlands. The effects of VAM-fungi will be examined in ...
This project has covered one or several aspects of the life cycle of the main miombo tree species, namely Afzelia quanzensis ,Brachystegia microphylla, Brachystegia spiciformis ,Julbernardia globifloraand Pterocarpus angolensis . These aspects included natural and artificial regeneration, fertilization, artificial inoculation of seedlings and natur...
Research on mycorrhizae of Dipterocarpaccae is described, involving inventories of both mycorrhizae and sporocarps in natural forest and experimental work in nurseries, green houses, laboratories and gnotobiotic systems. An assessment is made of dipterocarp mycorrhizal specificity and a discussion is presented on how mycorrhizal specificity may hav...
