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Shading reduces both visible and invisible frost damage to Norway spruce seedlings in the field


, : Shading reduces both visible and invisible frost damage to Norway spruce seedlings in the field. Forestry (Oxford) 66(1): 27-36

Two-year-old cuttings of Norway spruce were subjected to night frosts in spring on an exposed site in southern Sweden. Shading was used to assess the influence of sunlight on the extent of damage resulting from night frost. Chlorophyll fluorescence was measured in needles in flushing shoots, and in shoots at the stage of bud burst. The F-v:F-m ratio was significantly lower for plants exposed to light, compared with shaded plants on the days following the night frost (minimum temperature -6 degree C). The effect was similar both in 1-year-old and current year needles. The low F-v:F-m ratios indicate damage to photosystem II, caused by an interaction between subfreezing temperatures and high light intensity. Shading also increased the survival of flushing shoots. It is suggested that regeneration of Norway spruce on sites exposed to frost should be carried out in partial shade, for example under a shelterwood.

US$19.90

DOI: 10.1093/forestry/66.1.27


Other references

Will O.H.IIi; Tieszen L.L.; Kellen M.; Gerlach T., 1986: Stable carbon isotope discrimination in the smut fungus ustilago violacea. Haploid strains 15.10, 1.C429, and 1.C2y and diploid strain JK2 of Ustilago violacea were grown on one or more of the following carbon sources: glucose, sucrose, maltose, inulin, starch, inositol, glycerol, casein, and yeast extract. The media, bo...

Kamoi, H.; Yoshikawa, T.; Hirata, K., 2007: Clinical efficacy of inhaled corticosteroids in COPD. The use of inhaled corticosteroids in asthma is regarded as first-line therapy. But the efficacy of inhaled corticosteroids in the treatment of chronic obstructive pulmonary disease (COPD) remains controversial. However data from some large studie...

Cron, T.A.; Estlinbaum, W.; Weiss, P.; Cueni, T.; Buser, P.; Pfisterer, M.; Osswald, S., 1996: Non-invasive programmed stimulation for termination of recurrent atrial flutter in patients with bradycardia-tachycardia syndrome and DDDR pacemakers. European Heart Journal 17(ABSTR SUPPL ): 483

Rapport, L.J.; Meleen, M., 1998: Childhood celebrity, parental attachment, and adult adjustment: the young performers study. The associations between celebrity, parental attachment, and adult adjustment were examined among 74 famous, former young performers in television and film. As adults, former young performers whose parents served as their professional managers vie...

Klockenbbing, B.; Jonas, H.J., 1953: Summary of results of daughter-dam comparisons. Data from the records of the South HanoverBrunswick Herdbook Association are given on 161 comparisons involving 3294 daughter-dam pairs (i. e. 204 pairs per bull). G. E.

Arslan, M.Sayki.; Topaloglu, O.; Ucan, B.; Karakose, M.; Karbek, B.; Tutal, E.; Caliskan, M.; Ginis, Z.; Cakal, E.; Sahin, M.; Ozbek, M.; Delibasi, T., 2016: Isolated vitamin D deficiency is not associated with nonthyroidal illness syndrome, but with thyroid autoimmunity. This study aimed to compare thyroid functions, thyroid autoantibodies, and the existence of nonthyroidal illness syndrome (NTIS) according to vitamin D level. The study included age- and BMI-matched healthy volunteers with and without vitamin D de...

Hokr Z., 1981: Inflammable shales and bituminous rocks in Czechoslovakia. Zemny Plyn a Nafta 26(1): 155-160

Reese Ronald S., 1992: Floridan Aquifer system, southeastern Florida. Abstracts with Programs - Geological Society of America 24(2): 60

D.M.esschalck, Séphanie.; Deveugele, M.; Willems, S., 2012: Language, culture and emotions: exploring ethnic minority patients' emotional expressions in primary healthcare consultations. Study explores ethnic minority patients expression of emotional cues and concerns in primary healthcare, and examines relationships with patient, provider and consultation attributes. 191 video-recorded consultations were analyzed using the VR-CoD...

Salazar, G.; Temme, L.; Antonio, J.Charles., 2003: Civilian use of night vision goggles. Civil aviation operators have expressed an increased interest in conducting night operations with night vision imaging systems. The development of special operational concepts, hardware requirements, training requirements, and regulatory change an...