Changes in sizes of mesophyll cells underlies the adaptation of Betula platyphylla Sukacz. leaf to increased climate aridity
УДК 633.878.4:581.132
Abstract
Climate changes in Central Asia attract increasing attention to studies in successions, ecosystem transformations and plant adaptation. Functional mechanisms of plant adaptation are related to the changes in leaf structure, first of all, the architecture of carbon-assimilating tissues. We studied leaf mesophyll structure of Betula platyphylla Sukacz. from geographical regions in the southern part of East Siberia and Mongolia with different climate aridity. Birch populations represented a latitudinal range from the middle taiga to the forest-steppe. According our results changes in mesophyll structure occurred along the aridity gradient, which manifested in a significant decrease (by 38-40 %) in cell sizes and an increase in surface area and volume ratio of mesophyll. Such rearrangement of mesophyll structure provides a higher rate of intraleaf diffusion of CO2 and the maintenance of high level of photosynthesis under water deficiency. We concluded that changes in the sizes of carbon-assimilating cells which underlies the restructuring of leaf three-dimensional organization provides regulation of gas exchange, and is a key mechanism for the adaptation of the photosynthetic function of Betula platyphylla to increased aridity of the climate.
Downloads
Metrics
References
Гунин П. Д., Золотокрылин А. И., Виноградова В. В., Бажа С. Н. Динамика состояния растительного покрова Южной Монголии по данным NDVI // Аридные экосистемы, 2004. - Т. 10, № 24-25. - С. 29-35.
Гунин П. Д., Бажа С. Н., Данжалова Е. В., Цэрэнханд Г., Дробышев Ю. И., Ариунболд Э. Современная структура и динамика растительных сообществ на южной границе сухих степей Центральной Монголии // Аридные экосистемы, 2010. - Т. 16, № 2 (42). - С. 65-75.
Юдина П. К., Иванова Л. А., Ронжина Д. А., Золотарева Н. В., Иванов Л. А. Варьирование параметров листьев и содержания пигментов у трех видов степных растений в зависимости от аридности климата // Физиология растений, 2017. - Т. 64, № 2. - С. 1-14. DOI: 10.7868/S0015330317020142
Flexas J., Bota J., Loreto F., Cornic G., Sharkey T. D., Diffusive and metabolic limitations to photosynthesis under drought and salinity in C3 plant // Plant Biol., 2004. - Vol. 6. - P. 269-279.
Flexas J., Scoffoni C., Gago J., Sack L. Leaf Mesophyll Conductance and Leaf Hydraulic Conductance: an Introduktion to their Measurement and Coordination // J. Exp. Bot., 2013. - Vol. 64. - P. 3965-3981. DOI: 10.1042/BST20190312
Galmes J., Flexas J., Medrano H., Niinemets U., Valladares F. Ecophysiology of photosynthesis in semi-arid environments // Terrestrial Photosynthesis in a Changing Environment. A Molecular, Physiological and Ecological Approach / Flexas, J., Loreto, F., Medrano, H. (eds). - Cambridge, UK: Cambridge University Press, 2012. - P. 448-464. DOI: 10.1017/CBO9781139051477
IvanovL. A., IvanovaL. A., RonzhinaD. A. Changes in the specific density of leaves of Eurasian plants along the aridity gradient // Dokl. Biol. Sci., 2009. - Vol. 428. - P. 430-433. DOI: 10.1134/S0012496609050111
Ivanov L. A., Ivanova L. A., Ronzhina D. A., Yudina P. K. Changes in the Chlorophyll and Carotenoid Contents in the Leaves of Steppe Plants Along a Latitudinal Gradient in South Ural // Rus. J. Plant Physiol., 2013. - Vol. 60. - P. 812820. DOI: 10.1134/S1021443713050075
Ivanova L. A., Petrov M. S., Kadushnikov R. M. Determination of Mesophyll Diffusion Resistance in Chamaeri-on angustifolium by the method of three-dimensional reconstruction of the leaf cell packing // Russian Journal of Plant Physiology, 2006. - Vol. 53, № 3. - P. 316-324. DOI: 10.1134/S1021443706030058
Ivanova L. A., Ivanov L. A., Ronzhina D. A., Yudina P. K., Migalina S. V., Shinehuu T., Tserenkhand G., Voronin P. Yu., Anenkhonov O., Bazha S.N., Gunin P. D. Leaf traits of C3 and C4 plants Indicating Climatic Adaptation Along a Latitudinal Gradient in Southern Siberia and Mongolia // Flora, 2019. - Vol. 254. - P. 122-134. DOI: 10.1016/j. flora.2018.10.008
Ivanova L. A., Yudina P. K., Ronzhina D. A., Ivanov L. A., Holzel N. Quantitative Mesophyll Parameters Rather than Whole-leaf traits Predict Response of C3 Steppe Plants to Aridity // New Phytologist, 2017. - Vol. 217, iss. 2. - P. 558-570. DOI: 10.1111/nph.14840
Migalina S. V., Ivanova L. A., Makhnev A. K. Genetically Determined Volume of Mesophyll Cells of Birch Leaves as an Adaptation of the Photosynthetic Apparatus to Climate // Doklady Akademii Nauk, 2014. - Vol. 459, №. 6. - P. 765768. DOI: 10.1134/S0012496614060106
Terashima, I., Hanba, Y. T., Tholen, D., Niinemets, U., Leaf functional anatomy in relation to photosynthesis // Plant Physiol., 2011. - Vol. 155. - P. 108-116.
Ronzhina D. A., Ivanova L. A., Ivanov L. A. Leaf Functional Traits and Biomass of Wetland Plants in Forest and Steppe Zones // Russian Journal of Plant Physiology, 2019. - Vol. 66, № 3. - P. 393-402. DOI: 10.1134/S1021443719030129
