Plant studies on fluctuating asymmetry in Russia: Mythology and methodology

Kozlov, Mikhail V.

doi:10.1134/s1067413617010106

Cited by 23 publications

(13 citation statements)

References 30 publications

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“…This is a nice hypothesis-when it works. However, the evidence accumulated to date [22][23][24][25]56] suggests that support for this hypothesis is found in no more than half of the published studies. The actual proportion of opposing results may be even higher because of a preferential publication of confirmatory results [57,58].…”

Section: Importance Of Fa Measurements In Plantsmentioning

confidence: 99%

“…Leaf size is of a paramount importance for the carbon, water, and heat balance of a plant ( [12] and references therein), and it frequently serves as a measure of plant vigor [13,14] or productivity [15]. Leaf FA, which is defined as small random deviations from perfect symmetry, was long considered a universal index of environmental and genomic stress [16][17][18][19][20], though the evidence is mixed on whether FA consistently and significantly increases in organisms facing unfavorable conditions during their development [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Variation in Leaf Size and Fluctuating Asymmetry of Mountain Birch (Betula pubescens var. pumila) in Space and Time: Implications for Global Change Research

Zverev

Kozlov

2020

Symmetry

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Experimental, latitudinal, and historical approaches have been used to explore and/or predict the effects of global change on biota, and each approach has its own advantages and disadvantages. The weaknesses of these individual approaches can, potentially, be avoided by applying them simultaneously, but this is rarely done in global change research. Here, we explored the temporal and spatial variations in the leaf size and fluctuating asymmetry (FA) of mountain birch (Betula pubescens var. pumila) in the Murmansk region of Russia, with the aim of verifying the predictions derived from the responses of these traits to experimental manipulations of abiotic drivers of global change. The examination of herbarium specimens revealed that leaf length increased during the 20th century, whereas the FA in the number of leaf teeth decreased, presumably reflecting an increase in the carbon and nitrogen availability to plants in that century. Along a northward latitudinal gradient, leaf length decreased whereas FA increased, presumably due to the poleward decreases in air temperature. The study site, collection year, and latitude explained a larger part of the leaf length variation in mountain birch relative to the variation in FA. Leaf length is likely a better indicator than FA in studies addressing global environmental change impacts on plant performance.

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Section: Importance Of Fa Measurements In Plantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variation in Leaf Size and Fluctuating Asymmetry of Mountain Birch (Betula pubescens var. pumila) in Space and Time: Implications for Global Change Research

Zverev

Kozlov

2020

Symmetry

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“…However, according to Kozlov M.V. [9], large part of the studies is conducted at relatively low experimental level, which makes it impossible to describe the existing situation unambiguously. In fact, since the whole complex of environmental factors has an impact on plants, including abiotic and anthropogenic, it is difficult to separately identify the influence of one of these groups.…”

Section: Problem Statementmentioning

confidence: 99%

Stability of Citrinae Subtribe Development in the Conditions of the Mediterranean Area

Коротченко

Kondratyuk

Slepov

et al. 2019

KLS

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Fluctuating asymmetry as the value of random deviations reflects either stability or instability of development. It is quite often used by researchers to assess the level of influence of anthropogenic and climatic factors. This study is focused on the territory with favorable climate and low anthropogenic load. The object of the study includes leaf blades of woody plants Citrus X sinensis (Valencia), Citrus limon (Molla Mehmet), Citrus reticulata (Okitsu wase C. unshiu) and Punica granatum (Emek) of the city of Kemer of the Republic of Turkey. The reliability of the presented results is justified by the use of correct methods of study and adequate statistical processing of big data. The integrated indicator of fluctuating asymmetry was the highest for leaf blades of Punica granatum (0.019), Citrus limon (0.017), these plants are introduced species. Citrus X sinensis and Citrus reticulata were characterized by low level of destabilization of plants in the conditions of the Mediterranean Area. It is shown that the most sensitive morphological features of fluctuating asymmetry for Citrinae Citrus X sinensis subtribe plants are j4 and j5, Cítrus límon – j2 and j5, Citrus reticulata – j3 and j4.

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“…To date, many researchers have concentrated on the search for differences in FA between plant populations that have presumably experienced different levels of environmental stress [13][14][15][16]. At the scale of plant individuals and populations, leaf FA has been reported to increase with several environmental stressors, but controlled experiments have often led to inconclusive or 'negative' results that question the suitability of FA as an indicator of stress [15,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Efficiency is Higher in Asymmetric Leaves than in Symmetric Leaves of the Same Plant

2019

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Symmetry pervades nature, but asymmetry is also rather common. Deviations from genetically programmed symmetry are usually associated with internal or external developmental disturbances and may therefore be related to imperfections in physiological processes. In this study, we test the hypotheses that the photosynthetic efficiency of individual leaves of a plant is negatively related to their asymmetry. We measured chlorophyll fluorescence in leaves of three woody species (Betula pubescens, Populus tremula and Salix caprea) in early and late summer in two localities situated ca. 1000 km apart, and we quantified the asymmetry of these leaves by a multivariate measure based on the relative positions of several landmarks. Contrary to our expectation, we found that the photochemical efficiency of photosystem II was positively correlated with leaf fluctuating asymmetry; this effect was weak but consistent across the studied plant species, localities and seasons. Our finding adds to limited evidence that within-plant variation in leaf asymmetry is associated with variation in leaf physiology. Irrespective of the underlying mechanisms, which remain unknown, the results suggest that trees may benefit even more from their asymmetric leaves, at least in terms of photosynthesis, than they do from their more symmetric leaves.

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Plant studies on fluctuating asymmetry in Russia: Mythology and methodology

Cited by 23 publications

References 30 publications

Variation in Leaf Size and Fluctuating Asymmetry of Mountain Birch (Betula pubescens var. pumila) in Space and Time: Implications for Global Change Research

Variation in Leaf Size and Fluctuating Asymmetry of Mountain Birch (Betula pubescens var. pumila) in Space and Time: Implications for Global Change Research

Stability of Citrinae Subtribe Development in the Conditions of the Mediterranean Area

Photosynthetic Efficiency is Higher in Asymmetric Leaves than in Symmetric Leaves of the Same Plant

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