References Aebi H. 1984. Catalase in vitro. Methods Enzymol. 105: 121-126. Alia P. S. P., Pardha Saradhi P., Mohanty P. 1991. Proline enhances primary photochemical activities in isolated thylakoid membranes of Brassica juncea by arresting photoinhibitory damage. Biochem. Biophys. Res. Commun. 181: 1238-1244. Alscher R. G., Erturk N., Heath L. S. 2002. Role of superoxide dismutases in controlling oxidative stress in plants. J. Exp. Bot. 53
The effects of various concentrations of sorbitol (100, 200 and 360 mM) and NaCl (100, 200 and 300 mM) on root meristem cells of in vitro-cultured Allium cepa L. were analyzed after 10 and 20 days. Both root meristem cell cross-section area and nuclear volume decreased under osmotic and salt stress. The osmotic component of applied stresses had a greater impact on cell shrinkage, while ionic stress perturbed cell functioning, resulting in cell cycle arrest and various aberrations, affecting nucleus integrity. A concentration of 300 mM of NaCl in the culture medium caused complete inhibition of mitotic activity in onion root tip cells after 20 days of exposure. Analysis of the action of iso-osmotic concentrations of NaCl (200 mM) and sorbitol (360 mM) showed stronger mitodepressive effects of salt stress in comparison to osmotic stress.
Hrvoje Lepeduš, Mario Jakopec, Jasenka Antunović Dunić, Goran Krizmanić, Sanida Osmanović and Vera Cesar
Despite numerous data dealing with the biogenesis of photosynthetic membranes connected with specific functional alterations in higher plants this is still an insufficiently understood topic and is one of the most promising areas of research in plant biochemistry. The main goal of our study was to detect the impact of different temperatures on chlorophyll biosynthesis and the maximum quantum yield of PSII (Fv/Fm). Therefore, we investigated the greening processes in etiolated sunflower cotyledons (Helianthus annuus L.) grown at different temperatures (10, 20 and 30 °C) during 24 h. The dynamics of chlorophyll a and b (Chl a and Chl b) accumulation as well as photosystem II (PSII) effi ciency were observed. We also evaluated combined effects of different temperatures (20 and 30 °C) and short-term application of increased irradiation (800 μmol m-2 s-1) on effective quantum yield of PSII (ΔF/F’m) and non photochemical quenching (NPQ) in cotyledons with fully developed PSII. Our results showed reduced chlorophyll accumulation and the arrest of PSII assembly at 10 °C in comparison with 20 and 30 °C. Further, the increased irradiance induced equal down regulation of effective quantum yield of PSII at 20 and 30 °C, with significantly higher capability of heat dissipation at 30 °C.
Z. S. Bondarenko and O. I. Zinenko
Capture-mark-recapture data was used to infer growth rates of the Nikolsky’s viper, Vipera berus nikolskii (Vedmederja, Grubant et Rudaeva, 1986), in the Eastern Ukraine. We have found that growth rate is negatively correlated with age. The difference in growth rates before maturation is not significant between different sexes. Growth rates decrease rapidly after maturation in males and females, however adult males retain significantly higher average growth rates. There is large dispersion of growth rates in the group of adult females, which is caused, probably, by alteration of complete arrest of growth in the years with reproduction and more intensive growth in the years without it. Asymptotic snout-ventral length estimated after Von Bertalanffy model was 680 mm in females and 630 mm in males. Females mature after fifth and males mature after fourth hibernation. The larger females in vipers can not be the result of higher growth rates in females, but are the outcome of a combination of other factors including different maturation time and size (older and being larger), and, perhaps, longer life span due to lower mortality. Growth rates of the Nikolsky’s viper in the nature are higher than in other species in the group of small Eurasian vipers.
Justyna Stefanowicz-Hajduk, Anna Kawiak, Jerzy Gajdus, J. ochocka, Monika Paszkiewicz, Piotr Stepnowski and Ewa Łojkowska
-460. Lee MS, Yuet-Wa JC, Kong SK, Yu B, Eng-Choon VO, Nai-Ching HW, Chung-Wai TM, and Fung KP. 2005. Effects of polyphyllin D, a steroidal saponin in Paris polyphylla, in growth inhibition of human breast cancer cells and in xenograft. Cancer Biology and Therapy 4: 1248-1254. Liu MJ, Wang Z, Ju Y, Wong RN, and Wu QY. 2005. Diosgenin induces cell cycle arrest and apoptosis in human leukemia K562 cells with the disruption of Ca 2+ homeostasis. Cancer Chemotherapy and Pharmacology 55: 79-90. Mimaki Y, Sashida Y
Krzysztof Olszewski, Grzegorz Borsuk, Piotr Dziechciarz, Łukasz Wójcik and Jerzy Paleolog
REFERENCES Bąk, B., Siuda, M., & Wilde, J. (2012). Comparison of post-capping period in different subspecies of honey bee. Medycyna Weterynaryjna, 68 (10), 612-616. Calderone, N.W., & Lin, S. (2001). Arrestment activity of extracts of honey bee workerand drone larvae, cocoons and brood food on female Varroa destructor . Physiological Entomology, 26 , 341–350. https://doi.org/10.1046/j.0307-6962.2001.00254.x Czekońska, K., Chuda-Mickiewicz, B., & Samborski, J. (2015). Quality of honeybee drones reared in colonies with limited and unlimited
Farheen Jameel, Priyanka Agarwal, Mohd. Arshad and Mohd. Serajuddin
References Ahamad M.S., Siddiqui S., Jafri A., Ahmad S., Afzal M., Arshad M. 2014 - Induction of apoptosis and antiproliferative activity of naringenin in human epidermoid carcinoma cell through ROS generation and cell cycle arrest - PlOS One 9(10): e110003. Almatsier S. 2003 - Basic Principles of Nutrition - Gramedia Pustaka Utama (in Indonesian). Arita K., Kobuchi H., Utsumi T., Takehara Y., Akiyama J., Horton A.A., Utsumi K. 2001 - Mechanism of apoptosis in HL-60 cells induced by n-3 and n-6 polyunsaturated fatty acids - Biochem. Pharmacol
Dubravko Pavoković and Marijana Krsnik-Rasol
incomplete synthesis of carbohydrate determinants in gastrointestinal cancer. Gastroenterology 135, 142-151. Klein, E. M., Mascheroni, L., Pompa, A., Ragni, L., Weimar, T., Lilley, K. S., Dupree, P., Vitale, A., 2006: Plant endoplasmin supports the protein secretory pathway and has a role in proliferating tissues. The Plant Journal 48, 657-673. Koç, A., Wheeler, L. J., Mathews, C. K., Merrill, G. F., 2004: Hydroxyurea arrests DNA replication by a mechanism that preserves basal dNTP pools. Journal of Biological Chemistry
Ewelina Piątczak, Łukasz Kuźma and Halina Wysokińska
shelf. Phytochemistry 92: 8–15. G ueven A, and K norr D. 2011. Isoflavonoid production by soy plant callus suspension culture. Journal of Food Engineering 103: 237–243. H ayashi H, H uang P, and I noue K. 2003. Up-regulation of soyasaponin biosynthesis by methyl jasmonate in cultured cells of Glycyrrhiza glabra. Plant and Cell Physiology 44: 404–411. H ung JY, Y ang JC, T sai YM, and H uang MS. 2008. Antiproliferative activity of aucubin is through cell cycle arrest and apoptosis in human non-small cell lung cancer A549 cells
Piotr Żabicki, Elżbieta Kuta, Monika Tuleja, Katarzyna Rataj and Malec Przemysław
-specific cyclin-dependent kinase CDKB1;1 and transition factor E2Fa-DPa control the balance of mitotically dividing and endoreduplicating cells in Arabidopsis . Plant Cell 16: 2683-2692. BOWMAN JL, SMYTH DR, and MEYEROWITZ EM. 2012. The ABC model of flower development: then and now. Development 139: 4095-4098. doi:10.1242/dev.083972. BAUS AD, FRANZMAN L, and MEINKE DW. 1986. Growth in vitro of arrested embryos from lethal mutants of Arabidopsis thaliana . Theoretical and Applied Genetics 72: 577-586. CATTEROU M, DUBOIS F