Abstract
Foliar sprays withN 6-(m-hydroxybenzytyadenosine, (mOH)-[9R]BAP, one of the synthetic cytokinins, were applied to field-grown sugar beet twice during the vegetation period: before full canopy closing(I), 6 weeks before harvest(II) or both. Application of (mOH)[9R]BAP retained high cytokinin content that usually declines prior to harvest. The total content of isoprenoid cytokinins at harvest was 2.6-fold higher in (mOH)[9R]BAP-treated plants as compared to the controls. TreatmentI had no significant effect on contents of chlorophylls (Chl)a andb and carotenoids, nor on the rates of net photosynthesis (PN) or photorespiration (Rl), or on CO2 compensation concentration (Γ) measured during the whole vegetation period on detached leaves under optimum environmental conditions. Increased values in PN, RL and Chla andb contents were found in variantsII and I+II linked with a delay in leaf senescence before harvest. Transpiration rate and stomatal conductances of adaxial and abaxial epidermes were not significantly affected by any treatment.
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References
Arnon, D. I.: Copper enzymes in isolated chloroplasts. Polyphenoloxidase inBeta vulgaris. - Plant Physiol.24: 1–15, 1949.
Čatský, J., Šesták, Z.: Photosynthesis during leaf development. - In: Pessarakli, M. (ed.): Handbook of Photosynthesis. Pp. 633–660. Marcel Dekker, New York 1996.
Čatský, J., Tichá, I.: A closed system for measurement of photosynthesis, photorespiration and transpiration rates. - Biol. Plant.17: 405–410, 1975.
Chernyadev, I. I., Chvojka, L., A., Volfová, A., Březinová, A.: Photosynthesis in sugar beet leaves under the influence of cytokinins and triazine herbicides. - Photosynthetica20:196–203, 1986.
Kamínek, M.: Progress in cytokinin research. - Trends Biotechnol.10: 159–164, 1992.
Kamínek, M., Vaněk, T., Motyka, V.: Cytokinin activities of N6-benzyladenosine derivatives hydroxylated on the side-chain phenyl ring. - J. Plant Growth Regul.6: 113–120, 1987.
Kaše, M., Čatský, J.: Calculator-assisted measurements of photosynthetic, respiration and photorespiration rates in a closed gas exchange system. - Biol. Plant.25: 139–146, 1983.
Kotyk, A., Kamínek, M., Pulkrábek, J., Zahradníček, J.: Effect ofin vivo andin vitro application of the cytokinin N6-(m-hydroxybenzyl)adenosine on respiration and membrane transport processes in sugar beet.- Biol. Plant.38: 363–368, 1996.
Kuraishi, S., Sakurai, N., Tazaki, K., Sadatoku, K.: A possible relationship between chlorophyll synthesis and endogenous cytokinin levels in whole seedlings and excised cotyledons of squash. - In: Kamínek, M., Mok, D. W. S., Zažímalová, E. (ed.): Physiology and Biochemistry of Cytokinins in Plants. Pp. 283–288. SPB Academic Publishing, The Hague 1992.
Lichtenthaler, H. K.: Chlorophylls and carotenoids - pigments of photosynthetic biomembranes. - In: Colowick, S. P., Kaplan, N. O. (ed.): Methods in Enzymology. Vol. 148. Pp. 350–382. Academic Press, San Diego - New York - Berkeley -Boston - London - Sydney - Tokyo - Toronto 1987.
Luštinec, J., Kamínek, M., Beneš, K., Conrad, K.: Hormone-like effect of vascular tissue on starch accumulation in stem expiants of kale,Brassica oleracea. - Physiol. Plant.61: 224–230, 1984.
Morris, R. O., Akiyoshi, D. E., MacDonald, E. M. S., Morris, J. W., Regier, D. A., Zaerr, J. B.: Cytokinin metabolism in relation to tumor induction inAgrobacterium tumefaciens. - In: Wareing, P. F. (ed.): Plant Growth Substances. Pp. 167–178. Academic Press, London 1982.
Musgrave, M. E.: Cytokinins and oxidative processes. - In: Mok, D. W. S., Mok, M. C. (ed.): Cytokinins- Chemistry, Activity and Function. Pp. 167–178. CRC Press, Boca Raton 1994.
Pulkrábek, J.: [Application of foliar fertilizer and growth regulator on sugar beet.] - Agrochemie30: 338–341, 1990. [In Czech.]
Pulkrábek, J.: [Possibilities of affecting yield formation in sugar beet with biologically active substances.] - Rost. Výroba (Praha)41: 389–392, 1995. [In Czech.]
Šesták, Z. (ed.): Photosynthesis During Leaf Development. - Academia, Praha; Dr.W.Junk Publ., Dordrecht -Boston - Lancaster 1985.
Soejima, H., Sugiyama, T., Ishihara, K.: Changes in cytokinin activities and mass spectrometric analysis of cytokinins in root exudates of rice plant (Oryza sativa L.). Comparison between cultivare Nipponbare and Akenohoshi. - Plant Physiol.100: 1724–1729, 1992.
Synková, H., Wilhelmová, N., Šesták, Z., Pospíšilová, J.: Photosynthesis in transgenic plants with elevated cytokinin contents. - In: Pessarakli, M. (ed.): Handbook of Photosynthesis. In press. Marcel Dekker, New York 1996.
Vaňková, R., Kamínek, M., Eder, J., Vaněk, T.: Dynamics of production oftrans-zeatin andtrans-zeatin riboside by immobilized cytokinin-autonomous and cytokinin-dependent tobacco cells. - Plant Growth Regul.6: 146–157, 1987.
Vaňková, R., Hsiato, Ke, C., Bornman, C. H., Gaudinová, A.: Effects of synthetic cytokinins on levels of endogenous cytokinins and respiration patterns ofBeta vulgaris cells in suspension. - J. Plant Growth Regul.10: 197–199, 1991.
Wilhelmová, N., Kutík, J.: Influence of exogenously applied 6-benzylaminopurine on the structure of chloroplasts and arrangement of their membranes. - Photosynthetica31: 559–570, 1995.
Zahradníček, J., Koubová, J., Folbergerová, Z., Pulkrábek, J., Šroller, J., Švachula, V., Čatský, J., Kamínek, M., Pospíšilová, J., Kotyk, A.: [The effect of cytokinins and other growth regulators on the yield, technological quality and metabolism of sugar beet.] - Listy cukrovar. řepař. (Praha)111:229–235, 1995. [In Czech.]
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Čatský, J., Pospíšilová, J., Kamínek, M. et al. Seasonal changes in sugar beet photosynthesis as affected by exogenous cytokininN 6-(m- hydroxybenzyl)adenosine. Biol Plant 38, 511–518 (1996). https://doi.org/10.1007/BF02890598
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DOI: https://doi.org/10.1007/BF02890598