Features of the ecophysiological reaction of Arbutus andrachne L. on the impact of deep soil drought in the conditions of the Southern coast of the Crim
https://doi.org/10.36305/2019-4-153-37-48
Abstract
The ecophysiological response of Arbutus andrachne L. to the impact of deep soil drought was studied, optimum zones and thresholds of soil moisture, temperature and illumination limiting photosynthesis and transpiration of this species under the conditions of the Southern coast of the Crimea were determined. Genotypic features of Arbutus andrachne L. have been revealed to maintain optimal water balance in accordance with environmental conditions. The optima of the studied parameters were found: Ws = 55-75% FC, I = 1000- 1200 pmol / m2s, Pn = 14-17, 5 pmol / m2s. The ecophysiological response of plants to water deficiency was studied, information on the influence of intensity and duration of water stress was obtained. Reducing soil moisture to 20-17% FC (the first wave of drought) leads to the oppression of the plant: photosynthesis is reduced to Pn = 9-12. 5 pmol / m2s, transpiration to E = 55-65 mg/m2s, the leaves begin to overheat (the temperature difference between the leaf of the experimental and control plants in the midday hours is ΔTl = 2- 4°C). After watering the plant quickly recovers. As a result of a deep drought (the second wave), when soil moisture has reached Ws = 15-13% FC, photosynthesis Pn is reduced to almost zero, and at Ws ≤ 13% FC leaves wither. Transpiration is reduced to E = 15-25 mg / m2s, the leaves overheat (the temperature difference between the experimental and control plants reaches ΔTl = 100C in the afternoon hours), the diameter of the shoot was reduced by ∆d=1.1 mm, which is 16% compared to the initial value of the shoot thickness.
With prolonged drought, apical growth stops, turgor falls. With a decrease in soil moisture to Ws = 17- 13% FC, leaves overheat at ∆Tl = 5-10°C compared to the control plant, which is in normal humidification conditions.
A. andrachne has a relatively high photosynthetic potential for acclimatization to elevated temperatures. When the leaf temperature is above the optimum, the intensity of photosynthesis drops sharply, its optimal value is Tl = 28-30°C.
About the Author
A. T. Gil
Никитский ботанический сад - Национальный научный центр РАН
Russian Federation
Russian Federation
References
1. Annenkov A. A., Ivanov V.F., Khokhrin A.V., Akimov Yu.A. Methodological recommendations on prospecting for the design of the planting sites in the Crimea. Yalta, 1984. 26 p.
2. Gubanova TB. Assessment of the state of plants Arbutus andrachne L. on the territory of the natural reserve "Cape Martyan" and the Arboretum of the Nikitsky Botanical Gardens after adverse winter conditions 2011-2012. // Scientific notes of the natural reserve "Cape Martyan". 2013. № 4. pp. 121.
3. Drozdov S.N., Kurets VK Some aspects of ecological physiology of plants. Petrozavodsk: Petrozavodsk State University, 2003. 172 p.
4. Drozdov S.N., Popov E.G., Kuretz A.V., Talanov VK., Obshadko L.A., Vetchinnikova L.V. Influence of light and temperature on net photosynthesis and respiration Betulapendula var. pendula and Betula pendula var. carelica (Betulaceae, represented by) // Botanical journal. 1995. Vol. 80, 3: 60-64.
5. Ilnitsky О.А., Plugatar Yu.V, Korsakova S.P. Methodology, instrument base and practice of phytomonitoring. Simferopol: ARIAL, 2018. 233 p.
6. Kaibeyainen E.L., Pelkonen P. Optimization of the photosynthesis and of transpiration from attached leaves of willow plantations for rapid resumption. Plant Physiology. 2007. 54: 350- 355.
7. Koba V.P., Papelbu VV, Sakhno TM. State and dendrometric characteristics of young plants Arbutus andrachne L. in the reserve "Cape Martyan" // Bulletin of Nizhnevartovsk state University. 2018. № 3. P. 42-46.
8. Mokronosov А. Т. Ontogenetic aspect of photosynthesis. Moscow: Nauka, 1981. 196 p.
9. Falkova T.V., Galushko R.V., Lischuk A.I., Zakharenko G.S., Kraynyuk Е.S. Plasticity of Arbutus andrachne (Ericaceae) under drought conditions on the Southern coast of the Crimea. // Ukrainian Botanical journal. 2001, Vol. 58, № 6. P. 700-706.
10. Shevchenko S.V. Features of reproductive processes of some rare species of flora of the Crimea. // In the collection: Actual problems of botany and nature protection. Collection of scientific articles of the International scientific and practical conference dedicated to the 150th anniversary of the birth of Professor G. F. Morozov. Edited by S. F. Kotov. 2017. pp. 320- 330.
11. Eggers Е. V. Strawberry tree in the Crimea // Byul. Nikit. Bot. Gard. 1934. № 14. P. 3-38.
12. Karam F., Doulis A., OzturkM., Dogan Y., Sakcali S. Eco-physiological behaviour of two woody oak species to combat desertification in the east Mediterranean-a case study from Lebanon. - Procedia Social and Behavioral Sciences. 19. (2011). pp. 787-796. doi:10.1016/j.sbspro.2011.05.197
13. Korner C., SarrisD., Christodoulakis D. Long-term increase in climatic dryness in the East-Mediterranean as evidenced for the island of Samos.-Reg Environ Change (2005) 5: 27- 36 DOI 10.1007/s10113-004-0091-x
14. Larcher W. Physiological Plant Ecology: Ecophysiology and Stress Physiology of Functional Groups. Heidelberg: Springer-Verlag, 2003. 506 p.
15. Plugatar Y.V., Klymenko Z.K., Ulanovskaya I. V, Zykova VK., Plugatar S.A. Prospects for the use of the Crimean flora resources in the floriculture // Acta Horticulturae. 2019. Vol. 1240. P. 65-68. DOI: 10.17660/ActaHortic.2019.1240.10
16. PTM-48A Photosynthesis Monitor // Phyto-Sensor Group. URL: http://phyto-sensor.com/PTM-48A.en (дата обращения: 22.02.2017).
17. Wickens G.E. Ecophysiology of economic plants in arid and semi-arid lands / Gerald E. Wickens. 1998. 348 p. DOI 10.1007/978-3-662-03700-3.
Review
For citations:
Gil A.T. Features of the ecophysiological reaction of Arbutus andrachne L. on the impact of deep soil drought in the conditions of the Southern coast of the Crim. Plant Biology and Horticulture: theory, innovation. 2019;(153):37-48. (In Russ.) https://doi.org/10.36305/2019-4-153-37-48
Views:
266
Email this article 