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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ftciteseerx:oai:CiteSeerX.psu:10.1.1.582.2631 2023-05-15T16:12:00+02:00 Roots and Shoots after Boron Fertilization Silva Fennica Mikko Räisänen Tapani Repo Tarja Lehto The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.2631 http://www.metla.fi/silvafennica/full/sf43/sf432223.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.2631 http://www.metla.fi/silvafennica/full/sf43/sf432223.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.metla.fi/silvafennica/full/sf43/sf432223.pdf dieback freezing tolerance mineral nutrition text ftciteseerx 2016-08-28T00:02:32Z 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 kg–1 in unfertilized and 21 mg kg–1 in B-fertilized trees while critical level of B deficiency is considered to be 5 mg kg–1. 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 Text Fennoscandia Unknown Norway |
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English |
topic |
dieback freezing tolerance mineral nutrition |
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dieback freezing tolerance mineral nutrition Silva Fennica Mikko Räisänen Tapani Repo Tarja Lehto Roots and Shoots after Boron Fertilization |
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dieback freezing tolerance mineral nutrition |
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 kg–1 in unfertilized and 21 mg kg–1 in B-fertilized trees while critical level of B deficiency is considered to be 5 mg kg–1. 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 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Silva Fennica Mikko Räisänen Tapani Repo Tarja Lehto |
author_facet |
Silva Fennica Mikko Räisänen Tapani Repo Tarja Lehto |
author_sort |
Silva Fennica |
title |
Roots and Shoots after Boron Fertilization |
title_short |
Roots and Shoots after Boron Fertilization |
title_full |
Roots and Shoots after Boron Fertilization |
title_fullStr |
Roots and Shoots after Boron Fertilization |
title_full_unstemmed |
Roots and Shoots after Boron Fertilization |
title_sort |
roots and shoots after boron fertilization |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.2631 http://www.metla.fi/silvafennica/full/sf43/sf432223.pdf |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
http://www.metla.fi/silvafennica/full/sf43/sf432223.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.582.2631 http://www.metla.fi/silvafennica/full/sf43/sf432223.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1765997232482418688 |