The role of stored carbohydrates and nitrogen in the growth and stress tolerance of planted forest trees
العنوان: | The role of stored carbohydrates and nitrogen in the growth and stress tolerance of planted forest trees |
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المؤلفون: | Mercedes Uscola, Pedro Villar-Salvador, Douglass F. Jacobs |
المساهمون: | Universidad de Alcalá. Departamento de Ciencias de la Vida |
المصدر: | e_Buah Biblioteca Digital Universidad de Alcalá instname |
بيانات النشر: | Springer Science and Business Media LLC, 2015. |
سنة النشر: | 2015 |
مصطلحات موضوعية: | Cultivation practices, chemistry.chemical_element, Sowing, Reserves, Forestry, Growth, Biology, Evergreen, Photosynthesis, biology.organism_classification, Nitrogen, Acclimatization, Remobilization, Environmental science, Plantation establishment, Medio Ambiente, chemistry, Agronomy, Seedling, Shoot, Botany, Woody plant |
الوصف: | Plants store compounds that supplement external resources to maintain primaryfunctions. We reviewed the role of stored non-structural carbohydrates (NSC) and nitrogen(N) in juvenile woody species for spring growth and cold and drought stress tolerance,which are crucial processes for early performance of forest plantations. Plant functionaltypes differed in NSC and N partitioning and allocation to new growth. In general,however, new leaves/shoots were more enriched in remobilized resources than new fineroots. Conifers used less remobilized resources than broadleaf species for fine root growth.New shoots/leaves were mostly comprised of remobilized N ([60 %) in conifers andbroadleaf deciduous species, while broadleaf evergreens relied more on soil N (\50 %remobilized N). In contrast, few differences among functional groups existed in the contributionof remobilized carbon (C) to new leaves/shoots, which comprised 28&-45 % ofstored C reflecting the importance of current photosynthesis and distinctions in C and N remobilization physiology. Organ source strength for remobilized N was positively related to its contribution to seedling N content. However, leaves are priority N sources in evergreens, which remobilized more N than predicted by their contribution to seedling N content. In contrast, roots in broadleaf evergreens and conifers were poor contributors of remobilized N. Under low stress, spring growth has little effect on NSC reserves. However, prolonged and intense photosynthesis depression strongly reduces NSC. In contrast, N reserves usually decline after planting and their replenishment takes longer than for NSC reserves. Strong storage reduction can hinder seedling stress acclimation and survival capacity. Accumulation of stored resources can be promoted in the nursery by arresting plant growth and supplying resources at a higher rate than seedling growth and maintenance rate. We conclude that the way in which woody plants manage stored resources drives their growth and stress tolerance. However, plant functional types differ in storage physiology, which should be considered in silvicultural management Ministerio de Ciencia e Innovación Comunidad de Madrid Universidad de Alcalá |
وصف الملف: | application/pdf |
تدمد: | 1573-5095 0169-4286 |
الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33b190dc3278674497e3e9f6fbb02449Test https://doi.org/10.1007/s11056-015-9499-zTest |
حقوق: | OPEN |
رقم الانضمام: | edsair.doi.dedup.....33b190dc3278674497e3e9f6fbb02449 |
قاعدة البيانات: | OpenAIRE |
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