Cold acclimation of Norway spruce roots and shoots after boron fertilization
Boron deficiency, manifested as shoot dieback, is a problem in conifer stands growing on soils with high nitrogen availability in Fennoscandia. Earlier observations on Norway spruce (Picea abies L. Karst.) suggest that freezing tolerance is decreased by boron deficiency. Here, the effect of boron fe...
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ftdoajarticles:oai:doaj.org/article:c9d81b84fe7547f19fb137800ac36bbc 2023-05-15T16:12:04+02:00 Cold acclimation of Norway spruce roots and shoots after boron fertilization Räisänen, Mikko Repo, Tapani Lehto, Tarja 2009-01-01T00:00:00Z https://doi.org/10.14214/sf.208 https://doaj.org/article/c9d81b84fe7547f19fb137800ac36bbc EN eng Finnish Society of Forest Science https://www.silvafennica.fi/article/208 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.208 https://doaj.org/article/c9d81b84fe7547f19fb137800ac36bbc Silva Fennica, Vol 43, Iss 2 (2009) Forestry SD1-669.5 article 2009 ftdoajarticles https://doi.org/10.14214/sf.208 2022-12-31T03:29:35Z Boron deficiency, manifested as shoot dieback, is a problem in conifer stands growing on soils with high nitrogen availability in Fennoscandia. Earlier observations on Norway spruce (Picea abies L. Karst.) suggest that freezing tolerance is decreased by boron deficiency. Here, the effect of boron fertilization on cold acclimation of Norway spruce was studied in a young stand with initially low boron status two years after fertilization. Buds, stems, needles and roots were collected at five sampling times during cold acclimation and subsequently exposed to series of freezing temperatures. Lethal temperatures of organs were assessed by electrolyte leakage method (EL) and visual scoring of damage (VS). Freezing tolerance of buds was measured also by differential thermal analysis (DTA). The mean boron (B) concentration in needles was 4 mg kgâ1 in unfertilized and 21 mg kgâ1 in B-fertilized trees while critical level of B deficiency is considered to be 5 mg kgâ1. The risk for increased freezing injuries in the low-B trees was not evident since all trees achieved cold hardiness that would be sufficient in central Finland. At two sampling times out of five, shoots or stem of B-fertilized trees were slightly more freezing tolerant than non-fertilized trees. However, the present study does not give strong evidence for the hypothesis that decreased freezing tolerance in B deficiency would be a triggering factor for leader dieback in Norway spruce at the B levels studied. Article in Journal/Newspaper Fennoscandia Directory of Open Access Journals: DOAJ Articles Norway Silva Fennica 43 2 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Forestry SD1-669.5 |
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Forestry SD1-669.5 Räisänen, Mikko Repo, Tapani Lehto, Tarja Cold acclimation of Norway spruce roots and shoots after boron fertilization |
topic_facet |
Forestry SD1-669.5 |
description |
Boron deficiency, manifested as shoot dieback, is a problem in conifer stands growing on soils with high nitrogen availability in Fennoscandia. Earlier observations on Norway spruce (Picea abies L. Karst.) suggest that freezing tolerance is decreased by boron deficiency. Here, the effect of boron fertilization on cold acclimation of Norway spruce was studied in a young stand with initially low boron status two years after fertilization. Buds, stems, needles and roots were collected at five sampling times during cold acclimation and subsequently exposed to series of freezing temperatures. Lethal temperatures of organs were assessed by electrolyte leakage method (EL) and visual scoring of damage (VS). Freezing tolerance of buds was measured also by differential thermal analysis (DTA). The mean boron (B) concentration in needles was 4 mg kgâ1 in unfertilized and 21 mg kgâ1 in B-fertilized trees while critical level of B deficiency is considered to be 5 mg kgâ1. The risk for increased freezing injuries in the low-B trees was not evident since all trees achieved cold hardiness that would be sufficient in central Finland. At two sampling times out of five, shoots or stem of B-fertilized trees were slightly more freezing tolerant than non-fertilized trees. However, the present study does not give strong evidence for the hypothesis that decreased freezing tolerance in B deficiency would be a triggering factor for leader dieback in Norway spruce at the B levels studied. |
format |
Article in Journal/Newspaper |
author |
Räisänen, Mikko Repo, Tapani Lehto, Tarja |
author_facet |
Räisänen, Mikko Repo, Tapani Lehto, Tarja |
author_sort |
Räisänen, Mikko |
title |
Cold acclimation of Norway spruce roots and shoots after boron fertilization |
title_short |
Cold acclimation of Norway spruce roots and shoots after boron fertilization |
title_full |
Cold acclimation of Norway spruce roots and shoots after boron fertilization |
title_fullStr |
Cold acclimation of Norway spruce roots and shoots after boron fertilization |
title_full_unstemmed |
Cold acclimation of Norway spruce roots and shoots after boron fertilization |
title_sort |
cold acclimation of norway spruce roots and shoots after boron fertilization |
publisher |
Finnish Society of Forest Science |
publishDate |
2009 |
url |
https://doi.org/10.14214/sf.208 https://doaj.org/article/c9d81b84fe7547f19fb137800ac36bbc |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Silva Fennica, Vol 43, Iss 2 (2009) |
op_relation |
https://www.silvafennica.fi/article/208 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.208 https://doaj.org/article/c9d81b84fe7547f19fb137800ac36bbc |
op_doi |
https://doi.org/10.14214/sf.208 |
container_title |
Silva Fennica |
container_volume |
43 |
container_issue |
2 |
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1765997304713576448 |