Bud burst phenology in different poplar and willow clones

Y. Khoma, N. Kutsokon
Institute of Cell Biology and Genetic Engineering, National Academy of Sciences of Ukraine, Kyiv; Institute of Cell Biology and Genetic Engineering, National Academy of Sciences of Ukraine, Kyiv


In the face of global climate changes, studies of bud burst and bud set phenology in trees are necessary to determine the duration of the growing season of plants, the optimal planting period, and seasonal works to achieve high productivity. The purpose of our study was to investigate bud burst phenology in different poplar and willow clones, what is important for predicting possible responses of woody plants to climate changes. Materials and methods: Bud burst phenology in poplar and willow was monitored both on the plants growing at experimental plot and on potted plants. Open-field plant research was conducted on a test site of fast-growing bioenergy trees in the M.M. Gryshko National Botanical Garden of NAS of Ukraine (Kyiv). Nine most productive poplar and willow clones were selected for the potted experiment. Throughout the growing season, the plants were kept outdoors, and after the seasonal fall of the leaves, the plants were transferred to an unheated storage room with a limited light regime. During spring, bud burst phenology was screened weekly through 45 days according to the 6-scores scale. The studies showed that the poplar plants grown under laboratory conditions demonstrated faster rates of bud burst compared to the willows, while the plants at the experimental plot, on the contrary, shown faster bud burst in the willows comparing to poplar clones. Such effects may be caused by the restricted light regime at the laboratory space what probably had stronger impact on the bud burst in willows, and in the case of open-field plants also by other random environmental factors. In potted conditions, willows demonstrated a tendency for faster flushing of lateral buds, while most poplar clones showed faster apical bud growth under the same conditions.


poplar (Populus), willow (Salix), bud burst phenology, global climate changes

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Kuzovkina Y., Weih M., Romero A., Belyaeva I. et al. Salix: botany and global horticulture. Hortic Revs. 2008, 34:447–489.

Berlin S., Fogelqvist J., Lascoux M. et al. Polymorphism and divergence in two willow species, Salix viminalis L. and Salix schwerinii E. Wolf. G3. 2011, 1:387–400.

Kutsokon N. Thirteen interesting facts about poplars. Biology and chemistry in school. 2014, 5: 45-47.

Pleguezuelo C. Bioenergy farming using woody crops. A review. Agronomy for Sustainable Development, Springer Verlag / EDP Sciences/INRA.2015, 35: (2):95-119.

Kutsokon N., Jose S. Holzmueller E. A global analysis of temperature effects on Populus plantation production potential. American Journal of Plant Sciences. 2015, 6: 23-33.

Holubkova I. Some features of growth and development of the types of the Persica Mill. in the conditions of the right-bank forest-steppe of Ukraine. Scientific Bulletin of UNFU. 2016, 26 (3): 60-64.

Chuine I. Why does phenology drive species distribution? Philosophical Transactions of the Royal Society B-Biological Sciences. 2010, 365: 3149–3160.5.

Dijkstra J., Westerman E., Harris L. The effects of climate change on species composition, succession and phenology: a case study. Global Change Biology 2011, 17: 2360–2369.

Hänninen H., Kramer K. A Framework for modelling the annual cycle of trees in boreal and temperate regions. Silva Fennica.2007, 41(1): 167-205.

Hannah L. Phenology. Climate Change Biology (Second Edition), 2015.

Rohde A., Bastien C., Boerjan W. Temperature signals contribute to the timing of photoperiodic growth cessation and bud set in poplar. Tree Physiol. 2011, 31(5):472-82.

Arora R., Rowland L., Tanino K. Induction and release of bud dormancy in woody perennials: a science comes of age. Hort Science. 2003, 38(5): 911-921.

Schoot C. Dormancy cycling at the shoot apical meristem: transitioning between self-organization and self-arrest // Plant Sci. 2011, 180:120–131.

Pletsers A., Caffarra A., Kelleher C., Donnelly A. Chilling temperature and photoperiod influence the timing of bud burst in juvenile Betula pubescens Ehrh. and Populus tremula L. trees. Annals of Forest Science. 2015, 72:941–953.

Perry T. Dormancy of trees in winter. Science 1971, 171:29–36.

Polgar C., Primack R. Leaf-out phenology of temperate woody plants: from trees to ecosystems. New Phytol 2011, 191:926–941.

Sivadasan U., Randriamanana T., Julkunen-Tiitto R., Nybakken L. The vegetative buds of Salix myrsinifolia are responsive to elevated UV-B and temperature. Plant Physiol. Biochem. 2015, 93: 66-73.

Sanz-Perez V., Castro-Diez P., Valladares F. Differential and interactive effects of temperature and photoperiod on bud burst and carbon reserves in two co-occurring Mediterranean oaks. Plant Biol 2009, 11:142–151.

Lagercrantz U. At the end of the day: a common molecular mechanism for photoperiod responses in plants? J Exp Bot 2009, 60:2501–2515.

Keller S., Soolanayakanahally R., Guy R. et al. Climate driven local adaptation of ecophysiology and phenology in balsam poplar, Populus balsamifera L. (Salicaceae). Am J Bot 2011, 98:99–108.

Saure M. Dormancy release in deciduous fruit trees. Horticultural Reviews. 1985, 7: 239-300.

Way D. Tree phenology responses to warming: spring forward, fall back? Tree Physiology. 2011, 31: 469–471.

Pellis A., Laureysens I., Ceulemans R. Genetic variation of the bud and leaf phenology of seventeen poplar clones in a short rotation coppice culture. Plant Biology. 2004, 6:38-46.

Zalesny R., Hall R., Zalesny J. et al. Biomass and genotype × environment interactions of Populus energy crops in the Midwestern United States. Bioenerg. Res. 2009, 2: 106.

Parmesan C., Yohe G. A globally coherent fingerprint of climate change impacts across natural systems. Nature. 2003, 421: 37-42.

Cleland E. Shifting plant phenology in response to global change. Trends in Ecology & Evolution. 2007, 22: 357-365.

Kutsokon N., Rakhmetov D., Khudolieieva L. et al. Growth characteristics and energy productivity of poplars and willows under short rotation planting for the first vegetation year. Biological systems. 2017, 9 (2): 238-246.

Starova N. Breeding of Salicaceae. Lesn. prom-st. 1980; 208.

Weih M. Genetic and environmental variation in spring and autumn phenology of biomass willows (Salix spp.): effects on shoot growth and nitrogen economy. Tree Physiol. 2009; 29(12):1479-90. doi: 10.1093/treephys/tpp081.

Brelsford C., Robson T. Blue light advances bud burst in branches of three deciduous tree species under short-day conditions. Trees: Structure and Function. 2018, 32 (4): 1157–1164.

Ffrench-Constant R., Somers-Yeates R., Bennie J. et al. Light pollution is associated with earlier tree bud burst across the United Kingdom. Proc Biol Sci. 2016, 29: 283.

Ghelardini L., Berlin S., Weih M., Lagercrantz U., Gyllenstrand N., Rönnberg-Wästljung A. Genetic architecture of spring and autumn phenology in Salix. BMC Plant Biol 14, 31 (2014) doi:10.1186/1471-2229-14-31

Received: 07.11.2019

Revised: 08.11.2019

Signed for the press: 08.11.2019

DOI: http://dx.doi.org/10.17721/1728_2748.2019.79.79-84


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