Abstract
Radiation hormesis is a phenomenon in which low doses of ionizing radiation can have stimulatory effects on biological systems. The temperate brown alga Sargassum horneri was the subject of this study on the hormetic effects of low-dose 60Co gamma radiation on macroalgae incubated in vitro at high temperatures. Sargassum horneri embryos were irradiated with 15, 20, and 25 Gy 60Co radiation and then incubated in vitro at 18, 21, 24, 27, and 30 °C. The same radiation treatment was also applied to S. horneri embryos grown in situ in outdoor mass cultivation. Non-irradiated in vitro control cultures had optimal growth at 21 °C, but irradiated cultures had optimal growth at 27 °C and growth was significantly enhanced by 32% compared to the control cultures at 21 °C. In contrast, in situ cultures of S. horneri in outdoor 10-ton seawater tanks showed that irradiated thalli had less total biomass as compared to non-irradiated control thalli. While low doses of gamma radiation may induce high-temperature tolerance resulting in better growth rates under the highly controlled in vitro culture conditions, these effects were not clearly observed in the in situ outdoor mass-cultivation.
Similar content being viewed by others
References
Chen Y (2011) The hormesis of the green macroalga Ulva faciata with low-dose 60Cobalt gamma radiation. J Phycol 47:939–943
Choi H, Lee K, Yoo H, Kang P, Kim Y, Nam K (2008) Physiological differences in the growth of Sargassum horneri between the germling and adult stages. J Appl Phycol 20:729–735
Gileva Z, Timofeeva N, Timofeev-Resovskii N (1965) The effect of a single dose of gamma radiation Co-60 on the growth of chlorella cultures. Radiobiologiia 5:732–734 (In Russian)
Hoshino T, Hayashi T, Hayashi K, Hamada J, Lee J (1998) An antiviral active sulfated polysaccharide from Sargassum horneri (tuner) C. Agardh. Biol Pharm Bull 21:730–734
Jan S, Parween T, Siddiqi T, Mahmooduzzafar X (2012) Effect of gamma radiation on morphological, biochemical and physiological aspects of plants and plant products. Environ Rev 20:17–39
Kim J, Chung B, Kim J, Wi S (2005) Effects of gamma-irradiation on growth, photosynthesis, and antioxidative capacity of red pepper (Capsicum annuum L.) plants. J Plant Biol 48:47–56
Komatsu T, Matsunaga D, Mikami A, Sagawa T, Boisnier E, Tatsukawa K, Aoki M, Ajisaka T, Uwai S, Tanaka K, Ishida K, Tanoue H, Sugimoto T (2009) Abundance of drifting seaweeds in eastern East China Sea. J Appl Phycol 20:801–809
Komatsu T, Fukuda M, Mikami A, Mizuno M, Kantachumpoo A, Tanoue H, Kawamiya M (2014) Possible change in distribution of seaweed, Sargassum horneri, in Northeast Asia under A2 scenario of global warming and consequent effect on some fish. Mar Pollut Bull 85:317–324
Lin S, Huang R, Ogawa H, Liu L, Wang Y, Chiou Y (2017) Assessment of germling ability of the introduced marine brown alga, Sargassum horneri, in northern Taiwan. J Appl Phycol 29:2641–2649
Luckey T (1980) Hormesis with ionizing radiation. CRC Press, Boca Raton
Maity J, Mishra D, Chakraborty A, Saha A, Santra S, Chanda S (2005) Modulation of some quantitative and qualitative characteristics in rice (Oryza sativa L.) and mung (Phaseolus mungo L.) by ionizing radiation. Radiat Phys Chem 74:391–394
Marcu D, Cristea V, Daraban L (2013) Dose-dependent effects of gamma radiation on lettuce (Lactuca sativa var. capitata) seedlings. Int J Radiat Biol 89:219–223
Moussa H (2011) Low dose of gamma irradiation enhanced drought tolerance in soybean. Bulg J Agric Sci 17:63–72
Nanba N, Kado R, Ogawa H (2002) Long-term maintenance of germlings of Sargassum horneri and S. yezoense (Fucales, Phaeophyceae) at low photon irradiance. Sessile Organisms 19:1–5
Pang S, Liu F, Shan T, Gao S, Zhang Z (2009) Cultivation of the brown alga Sargassum horneri: sexual reproduction and germling production in tank culture under reduced solar irradiance in ambient temperature. J Appl Phycol 21:413–422
Provasoli L (1968) Media and prospects for the cultivation of marine algae. In: Watanabe A, Hattori A (eds) Cultures and collections of algae. Proc U.S.-Japan Conf Hakone, Japan, September 1966. Japanese Society of Plant Physiology, Tokyo, pp 63–75
Southam C, Ehrllich J (1943) Effects of extracts of western red cedar heartwood on certain wood-decaying fungi in culture. Phytopathology 33:517–524
Qi W, Zhang L, Wang L, Xu H, Jin Q, Jiao Z (2015) Pretreatment with low-dose gamma irradiation enhances tolerance to the stress of cadmium and lead in Arabidopsis thaliana seedlings. Ecotoxicol Environ Saf 115:243–249
Uchida T (1993) The life cycle of Sargassum horneri (Phaeophyta) in laboratory culture. J Phycol 29:231–235
Vo T, Kim K (2013) Fucoidans as a natural bioactive ingredient for functional foods. J Funct Foods 5:16–27
Wi S, Chung B, Kim J, Kim J, Baek M, Lee J, Kim Y (2007) Effects of gamma irradiation on morphological changes and biological responses in plants. Micron 38:553–564
William F (1972) Response of the alga Chlorella sorokiniana to 60Co gamma radiation. Nature 236:178–179
Zhang L, Zheng F, Qi W, Wang T, Ma L, Qiu Z, Li J (2016) Irradiation with low-dose gamma ray enhances tolerance to heat stress in Arabidopsis seedlings. Ecotoxicol Environ Saf 128:181–188
Acknowledgements
We would like to thank the staff at the Institute of Nuclear Energy Research (INER), Atomic Energy Council, Longtan, Taiwan for facilitating this research.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Huang, R., Chen, YC. The hormesis effects of low-dose 60Co gamma irradiation on high-temperature tolerance in cultivated Sargassum horneri (Fucales, Phaeophyceae). J Appl Phycol 30, 3395–3404 (2018). https://doi.org/10.1007/s10811-018-1521-3
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10811-018-1521-3