Ecogeographical determinants of investment in chemical defences in pines

IF 2.1 3区 农林科学 Q2 FORESTRY Trees Pub Date : 2022-10-11 DOI:10.1007/s00468-022-02354-5
Carla S. Pimentel, Elsa V. Gonçalves, João Campôa, Teresa Calvão, Matthew P. Ayres, Otília Correia, Cristina Máguas
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Key message

Pine tree species exhibit significant levels of phenotypic variation in the investment in defences, which can be correlated with life-history traits, geographical affiliations and climate.

Abstract

Understanding the ecological and environmental correlates of tree defences has value for understanding forest susceptibility to pests and pathogens in a time of global change. In the present work, we assessed how life-history attributes and biogeography are related to chemical defences of pine trees in Palaearctic and Nearctic forests. We studied adult trees of ten pine species in forests of Portugal and Eastern North America. We measured total phenols (using gallic acid as a standard) and condensed tannins (as catechin hydrate equivalents) in the phloem of pine branches. Pine trees in forests of Eastern North America presented higher levels of total phenolic content in their phloem tissues than pine trees in forests in Portugal. Higher values of precipitation were correlated with higher phenolic content and higher temperatures were associated with higher levels of condensed tannins. A few life-history traits—the maximum height reached by each pine species, the age at which they start reproducing, and the size of seeds—were positively related with defences. The present work points to interactions between life-history attributes, climate, and geographic location as predictors of defensive investment in pines. The results are useful for understanding differences within and among pine forests in susceptibility to pests and pathogens.

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松林化学防御投资的生态地理决定因素
松树物种在防御投入方面表现出显著的表型变异,这可能与生活史性状、地理隶属关系和气候有关。摘要在全球气候变化背景下,了解树木防御的生态和环境相关因素对了解森林对病虫害的易感性具有重要意义。在本工作中,我们评估了古北和新北极森林中松树的生活史属性和生物地理与化学防御的关系。我们研究了葡萄牙和北美东部森林中10种松树的成树。我们测量了松枝韧皮部中的总酚(以没食子酸为标准)和缩合单宁(作为儿茶素水合物当量)。北美东部森林的松树韧皮部总酚含量高于葡萄牙森林的松树。较高的降水量与较高的酚含量相关,较高的温度与较高的浓缩单宁水平相关。一些生活史特征——每一种松树能达到的最高高度,它们开始繁殖的年龄,以及种子的大小——都与防御呈正相关。目前的工作指出,生活史属性、气候和地理位置之间的相互作用是松树防御性投资的预测因素。研究结果有助于了解松林内部和松林之间对害虫和病原体易感性的差异。
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来源期刊
Trees
Trees 农林科学-林学
CiteScore
4.50
自引率
4.30%
发文量
113
审稿时长
3.8 months
期刊介绍: Trees - Structure and Function publishes original articles on the physiology, biochemistry, functional anatomy, structure and ecology of trees and other woody plants. Also presented are articles concerned with pathology and technological problems, when they contribute to the basic understanding of structure and function of trees. In addition to original articles and short communications, the journal publishes reviews on selected topics concerning the structure and function of trees.
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