Durodola Blessing, Blumenstein Kathrin, Terhonen Eeva
Department of Forest Botany and Tree Physiology, Faculty of Forest Sciences and Forest Ecology, Forest Pathology Research Group, Büsgen-Institute, University of Göttingen, Büsgenweg 2, 37077 Göttingen, Germany.
Forest Genetics and Forest Tree Breeding, Büsgen-Institute, Georg-August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany.
Eur J For Res. 2023;142(2):443-453. doi: 10.1007/s10342-023-01534-3. Epub 2023 Jan 27.
Norway spruce is one of Europe's most economically important tree species. However, it is highly susceptible to the root rot fungus . Climate change will benefit the pathogen as the tree host is weakened by, e.g., extended drought. Breeding can improve forest health, and several root rot genetic markers are suggested to improve the resistance of Norway spruce. This study aimed to compare the resistance (here defined as necrosis length) of Norway spruce families and genotypes against two strains of under different water availabilities. Our results show that the family and the genotype within the family have an impact on the necrosis length that is related to the aggressiveness of the fungal strains. Under low water conditions, the necrosis increased only in horizontal directions in phloem and sapwood. Similarly, the growth (seedling height) was not disturbed by abiotic stress (less water), indicating that the stress level (drought) was too low in this setting. The knowledge gained in this study could improve forest health in the changing climate by understanding the response of Norway spruce to pathogenic attacks under additional stress at the family level. This knowledge could be strategically used in forest breeding to improve the resistance of Norway spruce trees against root rot.
The online version contains supplementary material available at 10.1007/s10342-023-01534-3.
挪威云杉是欧洲经济上最重要的树种之一。然而，它极易感染根腐真菌。气候变化将有利于这种病原体，因为树木宿主会因例如长期干旱而变弱。育种可以改善森林健康状况，并且有人提出了几种根腐病基因标记来提高挪威云杉的抗性。本研究旨在比较挪威云杉家系和基因型在不同水分可利用条件下对两种菌株的抗性（此处定义为坏死长度）。我们的结果表明，家系和家系内的基因型对与真菌菌株侵袭性相关的坏死长度有影响。在低水分条件下，韧皮部和边材中的坏死仅在水平方向增加。同样，生长（幼苗高度）未受到非生物胁迫（水分较少）的干扰，表明在此环境下胁迫水平（干旱）过低。通过了解挪威云杉在家庭层面额外胁迫下对病原体攻击的反应，本研究获得的知识可以改善变化气候下的森林健康。这些知识可在森林育种中战略性地用于提高挪威云杉树对根腐病的抗性。
在线版本包含可在10.1007/s10342-023-01534-3获取的补充材料。
