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Accelerated Birch breeding - in plastic greenhouses

, : Accelerated Birch breeding - in plastic greenhouses. Forestry Chronicle 49(4): 172-173

Describes the use of greenhouses up to 7.5 m high, at the Foundation for Forest Tree Breeding in Finland, to promote early flowering of Betula verrucosa ( male flowers in the third and female flowers in the fourth growing season from seed), planted as 1-year-old seedlings, without artificial heating or illumination. The first seed-crop was of acceptable quality. A trial of CO2 enrichment of the air, by burning propane, resulted in flowering in the second and third growing seasons respectively.


Other references

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Abdussalam, M.; Blakemore, F., 1948: Some observations on proliferative dermatitis of the legs strawberry foot rot of sheep. Histologically, the lesion of strawberry foot rot (S.F.R.) is very different from that of contagious pustular dermatitis (C.P.D.); the infective agent is inhibited by ether, and it cannot be seen in electron micrographs. Thus, it is improbable tha...

Furman, S., 1973: Cardiac pacing--an endless frontier. Medical Instrumentation 7(3): 168-169

Bauer, F., 1982: Analysis of sensitivity of the three-point suspension of tractor Farm equipment, dependence on soil resistance.1. Acta Universitatis Agriculturae Facultas Agroeconomica Rada D: Spisy fakulty provozne ekonomicke8(1-2): 51-60

Uhl, R.R.; Lewis, F.J., 1974: Digital computer calculation of human pulmonary mechanics using a least squares fit technique. We have calculated pulmonary mechanics on six human subjects using a digital computer to least squares fit the equation describing pulmonary mechanics: P=1CV+RV for the constants C and R, during both the inspiratory and expiratory cycles. Values f...

Chai, B.; Li, J-Yao.; Zhang, W.; Ammori, J.B.; Mulholland, M.W., 2006: Melanocortin-3 receptor activates MAP kinase via PI3 kinase. HEK 293 cells stably expressing human melanocortin-3 receptor (MC3R) were exposed to melanocortin receptor agonist, NDP-MSH (10(-)(10)-10(-)(6) M). ERK1/2 was phosphorylated in a dose-dependent manner with an EC(50) of 3.3+/-1.5 x 10(-)(9) M, simi...

Olivier, A., 1991: Relevance of removal of limbic structures in surgery for temporal lobe epilepsy. We have briefly reviewed the experimental and clinical evidence for the importance of the amygdala and hippocampal formation in temporal lobe epilepsy. More specifically, we have analyzed our own experience in patients with temporal lobe epilepsy...

Caddy, K.W., 1978: The numbers of Purkinje, granule cells and olive neurones in the Lurcher mutant mouse [proceedings. Journal of Physiology 277: 8p-8p

Luo, L.; Mao, Z.; Li, S., 2002: Cellular compatibility study of ox collagen with fibroblast cells. The cell culture method was used to evaluate the cytotoxicity of ox collagen for clinical use. Direct method was chosen to examine the shape and growth of cells. Results showed that the cell shape was normal and the growth was well. The cytotoxici...

Juvin, H.; Terrier, H., 1951: Two cases of cutaneous pyeloplax tumors. Bulletin de la Societe Francaise de Dermatologie et de Syphiligraphie 58(5): 586-587