Liuyue Zhang, Karl J. Niklas, Ülo Niinemets, Qiying Li, Kexin Yu, Jiaqinan Li, Lei Chen, Peijian Shi
{"title":"Stomatal area estimation based on stomatal length and width of four Magnoliaceae species: even “kidney”-shaped stomata are not elliptical","authors":"Liuyue Zhang, Karl J. Niklas, Ülo Niinemets, Qiying Li, Kexin Yu, Jiaqinan Li, Lei Chen, Peijian Shi","doi":"10.1007/s00468-023-02425-1","DOIUrl":null,"url":null,"abstract":"<div><h3>Key message</h3><p>Stomatal area is proportional to the product of stomatal length and width with a proportionality coefficient exceeding π/4 (indicating a deviation from an elliptical shape) for four Magnoliaceae species.</p><h3>Abstract</h3><p>Stomatal size is an important factor affecting the photosynthetic and transpiration rates of vascular plants. To examine stomatal morphometrics, we measured the length (<i>L</i>), width (<i>W</i>), and area (<i>A</i>) of 960 stomata from four Magnoliaceae species within two genera (<i>Magnolia</i> and <i>Michelia</i>). Four mathematical models were used to estimate <i>A</i>: (i) <i>A</i> scales as a function of <i>LW</i>, which is referred to as the Montgomery equation (denoted as ME), (ii) <i>A</i> scales as a function of some power of <i>LW</i>, (iii) <i>A</i> scales as a function of <i>L</i><sup>2</sup>, and (iv) <i>A</i> scales as some power of <i>L</i>. The data show that ME is the best among the four models based on the trade-off between the goodness of fit and model structural complexity, i.e., <i>A</i> is proportional to <i>LW</i>. The ME was verified at the species level and for the pooled data. The proportionality coefficient of ME was affected by stomatal geometry and exceeded the proportionality coefficient predicted for an elliptical shape of stomata (π/4). This study provides a simple and relatively accurate method for measuring stomatal area (e.g., it decreases by 40.1% the root-mean-square error when calculating <i>A</i> using π/4 × <i>LW</i>). In addition, the proportionality coefficient of ME also provides a useful quantitative taxonomic parameter and a method to gauge the response of plants to environmental changes.</p></div>","PeriodicalId":805,"journal":{"name":"Trees","volume":"37 5","pages":"1333 - 1342"},"PeriodicalIF":2.1000,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Trees","FirstCategoryId":"2","ListUrlMain":"https://link.springer.com/article/10.1007/s00468-023-02425-1","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FORESTRY","Score":null,"Total":0}
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Key message
Stomatal area is proportional to the product of stomatal length and width with a proportionality coefficient exceeding π/4 (indicating a deviation from an elliptical shape) for four Magnoliaceae species.
Abstract
Stomatal size is an important factor affecting the photosynthetic and transpiration rates of vascular plants. To examine stomatal morphometrics, we measured the length (L), width (W), and area (A) of 960 stomata from four Magnoliaceae species within two genera (Magnolia and Michelia). Four mathematical models were used to estimate A: (i) A scales as a function of LW, which is referred to as the Montgomery equation (denoted as ME), (ii) A scales as a function of some power of LW, (iii) A scales as a function of L2, and (iv) A scales as some power of L. The data show that ME is the best among the four models based on the trade-off between the goodness of fit and model structural complexity, i.e., A is proportional to LW. The ME was verified at the species level and for the pooled data. The proportionality coefficient of ME was affected by stomatal geometry and exceeded the proportionality coefficient predicted for an elliptical shape of stomata (π/4). This study provides a simple and relatively accurate method for measuring stomatal area (e.g., it decreases by 40.1% the root-mean-square error when calculating A using π/4 × LW). In addition, the proportionality coefficient of ME also provides a useful quantitative taxonomic parameter and a method to gauge the response of plants to environmental changes.
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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