中乌拉尔地区四科单子叶植物的根系结构综合症

IF 4.6 1区 生物学 Q1 PLANT SCIENCES Plant Diversity Pub Date : 2023-11-01 DOI:10.1016/j.pld.2023.01.007
Anna A. Betekhtina , Daria E. Tukova , Denis V. Veselkin
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引用次数: 1

摘要

本文检验了以下一般假设:对菌根相互作用具有不同专一性的植物类群应具有不同的根系综合征。本文研究了北方地区常见的 61 个物种的根系:16 个 Poaceae 物种、24 个 Cyperaceae 物种、14 个 Orchidaceae 物种和 7 个 Iridaceae 物种。使用每个物种 5 个个体的固定材料测定了以下内容:分支根的数量级;根、茎和皮层的横向尺寸;木质部主血管和外皮层的数量;根毛的长度;菌根的数量。每个科的物种都有明确的综合征。兰科和鸢尾科的根茎粗大,具有较大的茎基和发达的外皮。兰科植物没有分枝根,根毛较长。鸢尾科植物的根有分枝,根毛较短。诗科(Poaceae)和香柏科(Cyperaceae)的根较细,根茎相对较薄。Poaceae 的根毛短,Cyperaceae 的根毛长。我们发现单子叶植物四个科的根综合征存在差异,这是一个意想不到的新发现。茜草科、鸢尾科、蒲葵科和兰科植物根系综合征的高度特异性表明,这些科的物种采用不同的策略获取水分和土壤养分。
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Root structure syndromes of four families of monocots in the Middle Urals

The present article tests the following general assumption: plant taxa with different specializations towards mycorrhizal interactions should have different root syndromes. Roots of 61 species common in boreal zone were studied: 16 species of Poaceae, 24 species of Cyperaceae, 14 species of Orchidaceae, and 7 species of Iridaceae. Using a fixed material of 5 individuals of each species, the following was determined: number of orders of branching roots; transverse dimensions of root, stele and cortex; number of primary xylem vessels and exodermis layers; length of root hairs; abundance of mycorrhiza. Species of each family had well-defined syndromes. Roots of Orchidaceae and Iridaceae were thick with a large stele and developed exodermis. Orchidaceae had no branching roots and had long root hairs. In Iridaceae, roots were branched, and root hairs were short. Roots of Poaceae and Cyperaceae were thin with a relatively thin stele. Root hairs were short in Poaceae and long in Cyperaceae. Our finding that root syndromes of four families of monocots differed is a new and unexpected discovery. The high specificity of root syndromes in Cyperaceae, Iridaceae, Poaceae, and Orchidaceae indicates that species of these families use different strategies to obtain water and soil nutrients.

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来源期刊
Plant Diversity
Plant Diversity Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.30
自引率
6.20%
发文量
1863
审稿时长
35 days
期刊介绍: Plant Diversity (formerly Plant Diversity and Resources) is an international plant science journal that publishes substantial original research and review papers that advance our understanding of the past and current distribution of plants, contribute to the development of more phylogenetically accurate taxonomic classifications, present new findings on or insights into evolutionary processes and mechanisms that are of interest to the community of plant systematic and evolutionary biologists. While the focus of the journal is on biodiversity, ecology and evolution of East Asian flora, it is not limited to these topics. Applied evolutionary issues, such as climate change and conservation biology, are welcome, especially if they address conceptual problems. Theoretical papers are equally welcome. Preference is given to concise, clearly written papers focusing on precisely framed questions or hypotheses. Papers that are purely descriptive have a low chance of acceptance. Fields covered by the journal include: plant systematics and taxonomy- evolutionary developmental biology- reproductive biology- phylo- and biogeography- evolutionary ecology- population biology- conservation biology- palaeobotany- molecular evolution- comparative and evolutionary genomics- physiology- biochemistry
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