Abstract
The effect of mannitol, glucose and sucrose on the stomatal behaviour of two desert species,Merremia aegyptia andM. dissecta has been studied. Stomatal opening did not uniformly depend on the decrease in turgor of the epidermal and subsidiary cells caused by the different osmotic potential of the sugars. Sucrose caused plasmolysis of the subsidiary cells only but this was not accompanied by the opening of the stomatal pore. InM. aegyptia, no plasmolysis was seen either in epidermal or subsidiary cells, even the stomata opened; inM. dissecta, on the other hand, plasmolysis occurred in these cells without any stomatal opening, after incubation in glucose or mannitol. Mannitol is least absorbed, glucose slightly more and sucrose is absorbed to a very large extent in the guard cells when the materials were inoubated in the respective sugar solutions. However, the absorption of these three sugars was almost always larger in isolated epidermal strips than in discs; in detached intact leaves it was still more reduced.
Abstract
Sledovali jsme vliv manitolu, glukosy a sacharosy na změny průduchů u dvou druhů pouštní rostliny,Merremia aegyptia aM. dissecta. Otevření průduchů nezáviselo pouze na snížení turgoru epidermálních a podpůmých buněk, které bylo způsobeno různym osmotickým potenciálem cukrů. Sacharosa působila plasmolysu pouze u podpůrných buněk, ale nedošlo k otevření průduchů. Po aplikaci glukosy nebo manitolu uM. aegyptia nedošlo k plasmolyse v epidermálních ani pod-půrných buňkách, i když došlo k otevření průduchů. UM. dissecta došlo u těchto buněk k plasmolyse, ale neotevřely se průduchy. Při aplikaci roztoku cukru určitého složení na pokusné rostliny byl svěracími buňkami absorbován manitol nejméně, glukosa více a sacharosa velmi značně. Absorpce těchto tři cukrů byla téměř vždy větší u isolované epidermis než u disků; v odříznutých celých listech byla ještě více redukována.
Similar content being viewed by others
References
Bhandari, M. C.: Ph. D. Thesis, University of Jodhpur, Jodhpur 1973.
Bhandari, M. C., Sen, D. N.: Role of epidermal cell turgor on stomatal regulation in isolated epidermal peelings ofCitrullus colocynthis (Linn.) Schabd. - Biochem. Physiol. Pflanzen164: 180–187, 1973.
Glinka, Z.: The effect of epidermal cell water potential on stomatal response to illumination of leaf discs ofVicia faba. -Physiol. Plant.24: 476–479, 1971.
Heath, O. V. S.: An experimental investigation of the mechanism of stomatal movement with some preliminary observations on the response of the guard cells to “shock”. - New Phytol.37: 385–395, 1938.
Heath, O. V. S.: The water relations of stomatal cells and the mechanisms of stomatal movement. - In.: Steward, F. C. (ed.): Plant Physiology. Pp. 193–250. Acad. Press, New York 1959.
Lloyd, F. E.: The physiology of stomata. - Carnegie Inst. Wash. Publ.82: 1–142, 1908.
Mathur, T.: Ph. D. Thesis, University of Jodhpur, Jodhpur 1973.
Meidner, H., Mansfield, T. A.: Physiology of Stomata. - McGraw Hill, London 1968.
Pallas, J. E.: Guard cell starch retention and accumulation in the dark. - Bot. Gaz.125: 102 to 107, 1964.
Pallas, J. E.: Mechanism of guard cell action. - Quart. Rev. Biol.41: 365–383, 1966.
Sen, D. N., Bhandari, M. C., Mathur, T.: Stomatal responses of some arid zone plant species. -Curr. Sci.41: 553–557, 1972.
Stålfelt, M. G.: The role of the epidermal cells in the stomatal movements. - Physiol. Plant.19: 241–256, 1966.
Willmer, C. M., Mansfield, T. A.: A critical examination of the use of detached epidermis in studies of stomatal physiology. - New Phytol.68: 363–375, 1969.
Willmer, C. M., Mansfield, T. A.: Further observations of cations-stimulated stomatal opening in isolated epidermis. - New Phytol.69: 639–645, 1970.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sharma, S.S., Sen, D.N. Effect of different sugars on stomatal behaviour inMerremia aegyptia (L.) Urban andM. dissecta Hallier F.. Biol Plant 18, 81–87 (1976). https://doi.org/10.1007/BF02923141
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02923141