Effects of atmospheric and soil water status on photosynthesis and growth in tomato
Qingjie Du, Dalong Zhang, Xiaocong Jiao, Xiaoming Song, Jianming Lihttps://doi.org/10.17221/701/2017-PSECitation:Du Q., Zhang D., Jiao X., Song X., Li J. (2018): Effects of atmospheric and soil water status on photosynthesis and growth in tomato. Plant Soil Environ., 64: 13-19.
The responses of tomato seedlings to different vapour pressure deficit (VPD) under low soil moisture were studied. Plants were grown in greenhouses with low and high VPD, under both well-watered and water stress conditions. Low VPD was effectively maintained below 1.5 kPa with a micro-fog system. Under well-watered conditions, low VPD resulted in reduced transpiration, but this did not affect plant water status or growth. Water stress induced leaf dehydration and inhibition of growth, but the adverse effects were significantly alleviated by a decrease in VPD. Under water stress, no difference in transpiration was observed between plants with or without the VPD regulation, but the whole-plant hydraulic conductance was higher under low VPD. Low VPD increased stomatal conductance in drought-stressed plants because it promoted stomatal development and increased stomatal aperture. Thus, stomatal limitation to photosynthesis was reduced by low VPD under water stress. The reduction in plant growth induced by water stress was moderated by low VPD, partially due to higher photosynthetic rate. These results suggest that decreasing VPD improves plant water status, which ultimately enhances photosynthesis and growth under water stress.Keywords:
atmospheric humidity; gas exchange; vegetable; drought stress; stomata; Solanum lycopersicum L.References:
ARVE LOUISE E., TERFA MESERET T., GISLERØD HANS RAGNAR, OLSEN JORUNN E., TORRE SISSEL (2013): High relative air humidity and continuous light reduce stomata functionality by affecting the ABA regulation in rose leaves. Plant, Cell & Environment, 36, 382-392 https://doi.org/10.1111/j.1365-3040.2012.02580.xBlum Abraham (2017): Osmotic adjustment is a prime drought stress adaptive engine in support of plant production. Plant, Cell & Environment, 40, 4-10 https://doi.org/10.1111/pce.12800de Boer H. J., Lammertsma E. I., Wagner-Cremer F., Dilcher D. L., Wassen M. J., Dekker S. C. (2011): Climate forcing due to optimization of maximal leaf conductance in subtropical vegetation under rising CO2. Proceedings of the National Academy of Sciences, 108, 4041-4046 https://doi.org/10.1073/pnas.1100555108Devi M. Jyostna, Taliercio Earl W., Sinclair Thomas R. (2015): Leaf expansion of soybean subjected to high and low atmospheric vapour pressure deficits. Journal of Experimental Botany, 66, 1845-1850 https://doi.org/10.1093/jxb/eru520Flexas J., Díaz-Espejo A., Conesa M. A., Coopman R. E., Douthe C., Gago J., Gallé A., Galmés J., Medrano H., Ribas-Carbo M., Tomàs M., Niinemets Ü. (2016): Mesophyll conductance to CO 2 and Rubisco as targets for improving intrinsic water use efficiency in C 3 plants. Plant, Cell & Environment, 39, 965-982 https://doi.org/10.1111/pce.12622Lawson T., Blatt M. R. (2014): Stomatal Size, Speed, and Responsiveness Impact on Photosynthesis and Water Use Efficiency. PLANT PHYSIOLOGY, 164, 1556-1570 https://doi.org/10.1104/pp.114.237107Leonardi Cherubino, Guichard Soraya, Bertin Nadia (2000): High vapour pressure deficit influences growth, transpiration and quality of tomato fruits. Scientia Horticulturae, 84, 285-296 https://doi.org/10.1016/S0304-4238(99)00127-2Lu Na, Nukaya Tsunaki, Kamimura Taichi, Zhang Dalong, Kurimoto Ikusaburo, Takagaki Michiko, Maruo Toru, Kozai Toyoki, Yamori Wataru (2015): Control of vapor pressure deficit (VPD) in greenhouse enhanced tomato growth and productivity during the winter season. Scientia Horticulturae, 197, 17-23 https://doi.org/10.1016/j.scienta.2015.11.001Martre P. (): Plasma Membrane Aquaporins Play a Significant Role during Recovery from Water Deficit. PLANT PHYSIOLOGY, 130, 2101-2110 https://doi.org/10.1104/pp.009019McAdam Scott A.M., Brodribb Timothy J. (2016): Linking Turgor with ABA Biosynthesis: Implications for Stomatal Responses to Vapor Pressure Deficit across Land Plants. Plant Physiology, 171, 2008-2016 https://doi.org/10.1104/pp.16.00380McDowell N. G., Phillips N., Lunch C., Bond B. J., Ryan M. G. (2002): An investigation of hydraulic limitation and compensation in large, old Douglas-fir trees. Tree Physiology, 22, 763-774 https://doi.org/10.1093/treephys/22.11.763Poorter Hendrik, Niinemets Ülo, Poorter Lourens, Wright Ian J., Villar Rafael (2009): Causes and consequences of variation in leaf mass per area (LMA): a meta-analysis. New Phytologist, 182, 565-588 https://doi.org/10.1111/j.1469-8137.2009.02830.xRodriguez-Dominguez Celia M., Buckley Thomas N., Egea Gregorio, de Cires Alfonso, Hernandez-Santana Virginia, Martorell Sebastia, Diaz-Espejo Antonio (2016): Most stomatal closure in woody species under moderate drought can be explained by stomatal responses to leaf turgor. Plant, Cell & Environment, 39, 2014-2026 https://doi.org/10.1111/pce.12774Sellin Arne, Rosenvald Katrin, Õunapuu-Pikas Eele, Tullus Arvo, Ostonen Ivika, Lõhmus Krista (2015): Elevated air humidity affects hydraulic traits and tree size but not biomass allocation in young silver birches (Betula pendula). Frontiers in Plant Science, 6, - https://doi.org/10.3389/fpls.2015.00860Sperry John S., Love David M. (2015): What plant hydraulics can tell us about responses to climate-change droughts. New Phytologist, 207, 14-27 https://doi.org/10.1111/nph.13354Varone Laura, Ribas-Carbo Miquel, Cardona Carles, Gallé Alexander, Medrano Hipólito, Gratani Loretta, Flexas Jaume (2012): Stomatal and non-stomatal limitations to photosynthesis in seedlings and saplings of Mediterranean species pre-conditioned and aged in nurseries: Different response to water stress. Environmental and Experimental Botany, 75, 235-247 https://doi.org/10.1016/j.envexpbot.2011.07.007Xu Z., Zhou G. (2008): Responses of leaf stomatal density to water status and its relationship with photosynthesis in a grass. Journal of Experimental Botany, 59, 3317-3325 https://doi.org/10.1093/jxb/ern185Yamori Wataru, Sakata Naoki, Suzuki Yuji, Shikanai Toshiharu, Makino Amane (2011): Cyclic electron flow around photosystem I via chloroplast NAD(P)H dehydrogenase (NDH) complex performs a significant physiological role during photosynthesis and plant growth at low temperature in rice. The Plant Journal, 68, 966-976 https://doi.org/10.1111/j.1365-313X.2011.04747.xZhang Dalong, Zhang Zhongdian, Li Jianming, Chang Yibo, Du Qingjie, Pan Tonghua, Aroca Ricardo (2015): Regulation of Vapor Pressure Deficit by Greenhouse Micro-Fog Systems Improved Growth and Productivity of Tomato via Enhancing Photosynthesis during Summer Season. PLOS ONE, 10, e0133919- https://doi.org/10.1371/journal.pone.0133919