Nutritional strategy underlying plant specialization to gypsum soils.

IF 2.6 3区 生物学 Q2 ECOLOGY
AoB Plants Pub Date : 2023-07-01 DOI:10.1093/aobpla/plad041
Andreu Cera, Gabriel Montserrat-Martí, Sara Palacio
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引用次数: 1

Abstract

Gypsum soils are amongst the most widespread extreme substrates of the world, occurring in 112 countries. This type of hypercalcic substrate has a suite of extreme physical and chemical properties that make it stressful for plant establishment and growth. Extreme chemical properties include low plant-available nitrogen and phosphorus and high plant-available sulphur and calcium, which impose strong nutritional imbalances on plants. In spite of these edaphic barriers, gypsum soils harbour rich endemic floras that have evolved independently on five continents, with highly specialized species. Plants that only grow on gypsum are considered soil specialists, and they have a foliar elemental composition similar to the elemental availability of gypsum soils, with high calcium, sulphur and magnesium accumulation. However, the physiological and ecological role of the unique foliar elemental composition of gypsum specialists remains poorly understood, and it is unknown whether it provides an ecological advantage over other generalist species on gypsum soils. This article reviews available literature on the impact of gypsum soil features on plant life and the mechanisms underlying plant adaptation to gypsum environments. We conclude with a hypothesis on the potential role of the nutritional strategy underlying plant specialization to gypsum soils: Gypsum specialists primarily use SO42- as a counter anion to tolerate high Ca2+ concentrations in cells and avoid phosphorus depletion, which is one of the most limiting nutrients in gypsum soils.

石膏土壤中植物特化的营养策略。
石膏土是世界上最广泛的极端基质之一,在112个国家都有。这种类型的高钙基质具有一系列极端的物理和化学特性,使其对植物的建立和生长产生压力。极端的化学性质包括植物有效氮和磷含量低,植物有效硫和钙含量高,这对植物造成了严重的营养不平衡。尽管存在这些地形障碍,石膏土中仍有丰富的特有植物群,这些植物群在五大洲独立进化,具有高度特化的物种。只生长在石膏上的植物被认为是土壤专家,它们的叶面元素组成与石膏土壤的元素可用性相似,钙、硫和镁的积累量高。然而,石膏专家独特的叶面元素组成的生理和生态作用仍然知之甚少,并且尚不清楚它是否比其他石膏土壤上的通才物种提供了生态优势。本文综述了石膏土壤特征对植物生命的影响以及植物适应石膏环境的机制。我们总结了一个关于植物特化到石膏土壤的营养策略的潜在作用的假设:石膏专家主要使用SO42-作为反阴离子来耐受细胞中高浓度的Ca2+并避免磷的消耗,这是石膏土壤中最受限制的营养物质之一。
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来源期刊
AoB Plants
AoB Plants PLANT SCIENCES-
CiteScore
4.80
自引率
0.00%
发文量
54
审稿时长
20 weeks
期刊介绍: AoB PLANTS is an open-access, online journal that has been publishing peer-reviewed articles since 2010, with an emphasis on all aspects of environmental and evolutionary plant biology. Published by Oxford University Press, this journal is dedicated to rapid publication of research articles, reviews, commentaries and short communications. The taxonomic scope of the journal spans the full gamut of vascular and non-vascular plants, as well as other taxa that impact these organisms. AoB PLANTS provides a fast-track pathway for publishing high-quality research in an open-access environment, where papers are available online to anyone, anywhere free of charge.
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