[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.7747/JFES.2018.34.6.435

Phenological Characteristics of Rhododendron Species in Temperate Mixed Broad-leaved Forests of Arunachal Himalaya, India

Paul, Ashish (Department of Forestry, North Eastern Regional Institute of Science and Technology (Deemed to be University))
Khan, Mohamed Latif (Department of Botany, Dr. Hari Singh Gour Central University)
Das, Ashesh Kumar (Department of Ecology and Environmental Science, Assam University)

Publication Information

Journal of Forest and Environmental Science / v.34, no.6, 2018 , pp. 435-450 More about this Journal

Abstract

Phenological events of four Rhododendron tree species (viz. R. arboreum, R. arboreum ssp. delavayi var. delavayi, R. barbatum and R. kesangiae) was monitored in temperate mixed broad-leaved forests of Arunachal Pradesh, India. Phenological events like flower bud formation, flowering, fruit setting, fruit maturing, seed dispersal, leaf bud formation, leaf flushing, and leaf shedding were recorded. Indices i.e., phenophase sequence index (PSI), active phenophasic period of the species (APS) and index of reproductive/vegetative activity (RVA) were also calculated. Present study revealed that bark consistency, growth form and leaf pattern of the studied species have showed variations among the species. Rhododendron species exhibited the phenological events overlapping with other phenophases. The peak flower bud formation was observed during the winter; R. arboreum ssp. delavayi var. delavayi start flowering from December, while the flowering in rest three species exhibited during February to April. Fruit setting occurred during summer to autumn while fruit maturation revealed peak during November. Leaf bud formation illustrated two peaks in April and May, leaf flushing exhibited peak in June, while leaf shedding peaked during October to November. Active phenophasic period of the species were found 12 months, which revealed that species engage in various phenophase activities throughout the year. Phenophase sequence index ranged between 0.8 to 0.9 (PSI ${\geq}0.6$ ), signifies that species have a sequential arrangement of phenophases. Index of reproductive/vegetative activity of the species exemplified >1, indicate that the reproductive phenophases were dominance over vegetative phenophases. The study have provided substantial insight on the life cycle events of Rhododendron species and ecological approaches for further scientific study with recent climate change and effective management and conservation.

Keywords

phenology; phenophase; reproductive; rhododendrons; vegetative;

Citations & Related Records

Reference

1	Menzel A, Estrella N, Testka A. 2005. Temperature response rates from long-term phenological records. Clim Res 30: 21-28. DOI
2	Menzel A, Sparks TH, Estrella N, Koch E, Aasa A, Ahas R, Alm-Kubler K, Bissolli P, Braslavska O, Briede A, Chmielewski FM, Crepinsek Z, Curnel Y, Dahl A, Defila C, Donnelly A, Filella Y, Jatczak K, Mage F, Mestre A, Nordli O, Penuelas J, Pirinen P, Remisova V, Scheifinger H, Striz M, Susnik A, Van Vliet AJH, Wielgolaski FE, Zach S, Zust A. 2006. European phenological response to climate change matches the warming pattern. Glob Chang Biol 12: 1969-1976. DOI
3	Miller-Rushing AJ, Hoye TT, Inouye DW, Post E. 2010. The effects of phenological mismatches on demography. Philos Trans R Soc Lond B Biol Sci 365: 3177-3186. DOI
4	Miller-Rushing AJ, Primack RB. 2008. Global warming and flowering times in Thoreau's Concord: a community perspective. Ecology 89: 332-341. DOI
5	Min BM. 2000. Comparison of phenological characteristics for several woody plants in urban climates. J Plant Biol 43: 10-17. DOI
6	Misra R. 1968. Ecology Work Book. Oxford and IBH Publishing Company, New Delhi, 244 pp.
7	Monk CD, McGinty DT, Day FP Jr. 1985. The ecological importance of Kalmia latifolia and Rhododendron maximum in the deciduous forest of the southern Appalachians. Bull Torrey Bot Club 112: 187-193. DOI
8	Mooney HA, Kummerow J, Johnson W, Parsons DJ, Keeley S, Hoffmann A, Hays RI, Giliberto J, Chu C. 1977. The producers-their resources and adaptive responses. In: Convergent evolution in Chile and California. Mediterranean climate ecosystems (Mooney HA, ed). Dowden, Hutchinson and Ross, Stroudsburg. pp 85-143.
9	Mooney HA. 1983. Carbon-gaining capacity and allocation patterns of Mediterranean-climate plants. In: Miditerranean-type ecosystems : the role of nutrients (Kruger FJ, Mitchell DT, Jarvis JUM, eds). Springer-Verlag, Berlin, pp 103-119.
10	Perez Latorre AV, Cabezudo B. 2006. Phenomorphology and eco-morphological characters of Rhododendron lauroid forests in the Western Mediterranean (Iberian Peninsula, Spain). Plant Ecol 187: 227-247. DOI
11	Perez-Latorre AV, Gavira O, Cabezudo B. 2010. Phenomorphology and ecomorphological characters of Maytenus senegalensis L. Shrublands in the Iberian Peninsula: A comparison with other Mediterranean plant communities. Flora 205: 200-210. DOI
12	Pilar CD, Gabriel MM. 1998. Phenological pattern of fifteen Mediterranean phanaerophytes from shape Quercus ilex communities of NE-Spain. Plant Ecol 139: 103-112. DOI
13	Polunin O, Stainton A. 2006. Flowers of the Himalaya. Oxford University Press, Delhi, 580 pp.
14	Poulin B, Wright SJ, Lefebvre G, Calderon O. 1999. Interspecific synchrony and asynchrony in the fruiting phenologies of congeneric bird-dispersed plants in Panama. J Trop Ecol 15: 213-227. DOI
15	Pradhan UC, Lachungpa ST. 1990. Sikkim-Himalayan Rhododendrons. Primulaceae Books, Kalimpong, 130 pp.
16	Primack RB, Miller-Rushing AJ. 2011. Broadening the study of phenology and climate change. New Phytol 191: 307-309. DOI
17	Ralhan PK, Khanna RK, Singh SP, Singh JS. 1985. Phenological characteristics of the tree layer of Kumaun Himalayan forests. Vegetatio 60: 91-101. DOI
18	Ranjitkar S, Luedeling E, Shrestha KK, Guan K, Xu J. 2013. Flowering phenology of tree rhododendron along an elevation gradient in two sites in the Eastern Himalayas. Int J Biometeorol 57: 225-240. DOI
19	Rathcke B, Lacey EP. 1985. Phenological patterns of terrestrial plants. Annu Rev Ecol Evol S 16: 179-214. DOI
20	Morellato LPC, Talora DC, Takahasi A, Bencke CC, Romera EC, Zipparro VB. 2000. Phenology of Atlantic rain forest trees: a comparative study. Biotropica 32: 811-823. DOI
21	Morellato P, Rodrigues RR, Leitao-Filho HF, Joly CA. 1990. Estrategias fenologicas de especies arboreas em floresta de altitude na Serra do Japi, Jundiai, Sao Paulo. Rev Bras Biol 50: 149-162.
22	Morisette JT, Richardson AD, Knapp AK, Fisher JI, Graham EA, Abatzoglou J, Wilson BE, Breshears DD, Henebry GM, Hanes JM, Liang L. 2009. Tracking the rhythm of the seasons in the face of global change: phenological research in the 21st century. Front Ecol Environ 7: 253-260. DOI
23	Negi GCS, Singh SP. 1992. Leaf growth pattern in evergreen and deciduous species of the Central Himalaya, India. Int J Biometeorol 36: 233-242. DOI
24	Newstrom LE, Frankie GW, Baker HG, Colwell RK. 1994a. Diversity of long-term flowering patterns. In: La Selva. Ecology and Natural History of a Neotropical Rain Forest (Mcdade LA, Bawa KS, Hespenheide HA, Hartshorm GS, eds). University of Chicago Press, Chicago, pp 142-160.
25	Newstrom LE, Frankie GW, Baker HG. 1994b. A new classification for plant phenology based on flowering patterns in lowland tropical rain forest trees at La Selva, Costa Rica. Biotropica 26: 141-159. DOI
26	Nilsen ET. 1986. Quantitative phenology and leaf survivorship of rhododendron maximum in contrasting irradiance environments of the southern Appalachian Mountains. Am J Bot 73: 822-831. DOI
27	Nord EA, Lynch JP. 2009. Plant phenology: a critical controller of soil resource acquisition. J Exp Bot 60: 1927-1937. DOI
28	Orshan G. 1989. Plant pheno-morphological studies in Mediterranean type ecosystems. Kluwer Academic Publishers, Dordrechts. 416 pp.
29	Robbirt KM, Davy AJ, Hutchings MJ, Roberts DL. 2011. Validation of biological collections as a source of phenological data for use in climate change studies: a case study with the orchid Ophrys sphegodes. J Ecol 99: 235-241. DOI
30	Pangtey YPS, Rawal RS, Bankoti NS, Samant SS. 1990. Phenology of high-altitude plants of Kumaun in Central Himalaya, India. Int J Biometeorol 34: 122-127. DOI
31	Parmesan C, Yohe G. 2003. A globally coherent fingerprint of climate change impacts across natural systems. Nature 421: 37-42. DOI
32	Parmesan C. 2006. Ecological and evolutionary responses to recent climate change. Annu Rev Ecol Evol Syst 37: 637-669. DOI
33	Paruelo JM, Jobbagy EG, Sala OE. 2001. Current distribution of ecosystem functional types in temperate South America. Ecosystems 4: 683-698. DOI
34	Paul A, Khan ML, Arunachalam A, Arunachalam K. 2005. Biodiversity and conservation of rhododendrons in Arunachal Pradesh in the Indo-Burma biodiversity hotspot. Curr Sci 89: 623-634.
35	Paul A, Khan ML, Das AK, Dutta PK. 2010a. Diversity and distribution of rhododendrons in Arunachal Himalaya, India. J Am Rhododendron Soc 64: 200-205.
36	Paul A, Khan ML, Das AK. 2010b. Utilization of rhododendrons by Monpas in western Arunachal Pradesh, India. J Am Rhododendron Soc 64: 81-84.
37	Paul A. 2008. Studies on diversity and regeneration ecology of rhododendrons in Arunachal pradesh. PhD thesis. Assam University, Silchar, Assam, India.
38	Rodriguez-Gallego C, Navarro T. 2015. Vegetative and reproductive phenological patterns in coastal dunes in S Spain. Anales Jard Bot Madrid 72: e017. DOI
39	Root TL, Price JT, Hall KR, Schneider SH, Rosenzweig C, Pounds JA. 2003. Fingerprints of global warming on wild animals and plants. Nature 421: 57-60. DOI
40	Ross G. 1998. Botanica : The illustrated A-Z of over 10,000 garden plants for Australian gardens and how to cultivate them. Random House, Milsons Point, 1008 pp.
41	Sarmiento G, Monasterio M. 1993. Life forms and phenology. In: Ecosystems of the World XIII. Tropical Savannas (Bourliere F, Walker BH, eds). Elsevier, Amsterdam, pp 79-108.
42	Schwartz MD. 2003. Phenology: an integrative Environmental Science. Kluwer Academic Publishers, Dordrecht, 592 pp.
43	Seghieri J, Vescovo A, Padel K, Soubie R, Arjounin M, Boulain N, de Rosnay P, Galle S, Gosset M, Mouctar AH, Peugeot C, Timouk F. 2009. Relationships between climate, soil moisture and phenology of the woody cover in two sites located along the West African latitudinal gradient. J Hydrol 375: 78-89. DOI
44	Basnett S, Devy SM. 2015. Fragrance of life. Down to Earth, New Delhi, 46-48.
45	Batalha MA, Martins FR. 2004. Reproductive phenology of the cerrado plant community in Emas National Park (central Brazil). Aust J Bot 52: 149-161. DOI
46	Bawa KS, Bullock SH, Perry DR, Coville RE, Grayum MH. 1985. Reproductive biology of tropical lowland rain forest trees. II. pollination systems. Am J Bot 72: 346-356. DOI
47	Perez Latorre AV, Cabezudo B. 2002. Use of monocharacteristic growth forms and phenological phases to describe and differentiate plant communities in Mediterranean-type ecosystems. Plant Ecol 161: 231-249. DOI
48	Beatley JC. 1974. Phenological events and their environmental triggers in Mojave desert ecosystems. Ecology 55: 856-863. DOI
49	Bertin RI. 2008. Plant phenology and distribution in relation to recent climate change. J Torrey Bot Soc 135: 126-146. DOI
50	Blake J, Harris GP. 1960. Effects of nitrogen nutrition on flowering in carnation. Ann Bot 24: 247-256. DOI
51	Bolmgren K, Eriksson O, Linder HP. 2003. Contrasting flowering phenology and species richness in abiotically and biotically pollinated angiosperms. Evolution 57: 2001-2011. DOI
52	Boojh R, Ramakrishnan PS. 1981. Phenology of trees in a sub-tropical evergreen montane forest in north-east India. Geo Eco Trap 5: 189-209.
53	Borchert R, Meyer SA, Felger RS, Porter-Bolland L. 2004. Environmental control of flowering periodicity in Costa Rican and Mexican tropical dry forests. Glob Ecol Biogeogr 13: 409-425. DOI
54	Chamberlain DF. 1996. The Genus Rhododendron: it's classification and synonymy. Royal Botanic Garden Edinburgh, Edinburgh, 181 pp.
55	Chowdhery HJ, Giri GS, Pal GD, Pramanik A, Das SK. 2008. Materials for the Flora of Arunachal Pradesh. Vol. 2. Asteraceae-Ceratophyllaceae. Botanical Survey of India, Calcutta, pp 73-98.
56	Chuine I. 2010. Why does phenology drive species distribution? Philos Trans R Soc Lond B Biol Sci 365: 3149-3160. DOI
57	Cornejo-Tenorio G, Ibarra-Manriquez G. 2007. Plant reproductive phenology in a temperate forest of the Monarch Butterfly Biosphere Reserve, Mexico. Interciencia 32: 445-452.
58	Cox PA, Cox KNE. 1997. The Encyclopedia of Rhododendron Species. Glendoick Publishing, Glencarse, Perth, 416 pp.
59	Kameyama Y, Kudo G. 2009. Flowering phenology influences seed production and outcrossing rate in populations of an alpine snowbed shrub, Phyllodoce aleutica: effects of pollinators and self-incompatibility. Ann Bot 103:1385-1394. DOI
60	Kanjilal UN, Kanjilal PC, Das A, De RN. 1939. Flora of Assam. Caprifoliaceae to Plantaginaceae. Vol. 3. Published under the authority of the Government of Assam, Shillong, pp 146-157.
61	Kikim A, Yadava P. 2001. Phenology of tree species in subtropical forests of Manipur in north eastern India. Trop Ecol 42: 269-276.
62	Kikuzawa K, Lechowicz MJ. 2011. Ecology of leaf longevity. Springer, New York, pp 203-213.
63	Korner C, Basler D. 2010. Phenology under global warming. Science 327: 1461-1462.
64	Korner C. 1993. Scaling from species to vegetation: the usefulness of functional groups. Biodiversity and ecosystem function. In: Biodiversity and Ecosystem Function (Schulze ED, Mooney HA, eds). Springer-Verlag, Berlin, pp 117-140.
65	Dahlgren JP, Zeipel Hv, Ehrlen J. 2007. Variation in vegetative and flowering phenology in a forest herb caused by environmental heterogeneity. Am J Bot 94: 1570-1576. DOI
66	de Milleville R. 2002. The Rhododendrons of Nepal. Himal Books, Patan Dhoka, Lalitpur. 136 pp.
67	Amico GC, Aizen MA. 2005. [Seed dispersal by birds in a temperate forest of southern South America: who disperses to whom]? Ecol Austral 15: 89-100. Spanish.
68	Basnett S, Devy S. 2013. Rhododendrons. Beyond just beautiful flowers. Sanctuary Asia, Mumbai, 61-63.
69	Diaz S, Cabido M. 1997. Plant functional types and ecosystem function in relation to global change. J Veg Sci 8: 463-474. DOI
70	Fang M, Fang R, He M, Hu L, Yang H, Chamberlain DF. 2005. Rhododendron Linnaeus. In: Flora of China. Vol. 14, Illustrations : Apiaceae through Ericaceae (Wu Z, Raven PH, Hong D, eds). Science Press, Beijing; China and Missouri Botanic Garden Press, St. Louis, pp 260-455.
71	Fenner M. 1998. The phenology of growth and reproduction in plants. Perspect Plant Ecol Evol Syst 1: 78-91. DOI
72	Fitter AH, Fitter RS. 2002. Rapid Changes in Flowering Time in British Plants. Science 296: 1689-1691. DOI
73	Korner C. 2003. Alpine plant life : Functional plant ecology of high mountain ecosystems. 2nd edition. Springer-Verlag, Berlin, 344 pp.
74	Kramer K, Leinonen I, Loustau D. 2000. The importance of phenology for the evaluation of impact of climate change on growth of boreal, temperate and Mediterranean forests ecosystems: an overview. Int J Biometeorol 44: 67-75. DOI
75	Kudo G, Ida TY, Tani T. 2008. Linkages between phenology, pollination, photosynthesis, and reproduction in deciduous forest understory plants. Ecology 89: 321-331. DOI
76	Kudo G, Suzuki S. 2002. Relationships between flowering phenology and fruit-set of dwarf shrubs in alpine fellfields in northern Japan: a comparison with a subarctic heathland in Northern Sweden. Arct Antarct Alp Res 34: 185-190. DOI
77	Gibbs D, Chamberlain D, Argent G. 2011. The Red List of Rhododendrons. Botanical Gardens Conservation International, Richmond, 128 pp.
78	Hooker JD, Hooker WJ, Fitch WH. 1849. The rhododendrons of Sikkim-Himalaya : being an account, botanical and geographical, of the rhododendrons recently discovered in the mountains of eastern Himalaya, from drawings and descriptions made on the spot, during a government botanical mission to that country. Reeve, Benham, and Reeve, London.
79	Hora B. 1981. The Oxford Encyclopedia of Trees of the World. Oxford University Press, New York, 288 pp.
80	Sharp RG, Else MA, Cameron RW, Davies WJ. 2009. Water deficits promote flowering in Rhododendron via regulation of pre and post initiation development. Sci Hortic 120: 511-517. DOI
81	Shukla RP, Ramakrishnan PS. 1982. Phenology of trees in a sub-tropical humid forest in north-eastern India. Vegetatio 49: 103-109. DOI
82	Sparks TH, Jeffree EP, Jeffree CE. 2000. An examination of the relationship between flowering times and temperature at the national scale using long-term phenological records from the UK. Int J Biometeorol 44: 82-87. DOI
83	Spina AP, Ferreira WM, Leitao-Filho HF. 2001. Floracao, frutificacao e sindromes de dispersao de uma comunidade de floresta de brejo na regiao de Campinas (SP). Acta Bot Bras 15: 349-368. DOI
84	Kudo G, Suzuki S. 2004. Flowering phenology of tropical-alpine dwarf trees on Mount Kinabalu, Borneo. J Trop Ecol 20: 563-571. DOI
85	Kudo G. 1993. Relationship between flowering time and fruit set of the entomophilous alpine shrub, Rhododendron aureum (Ericaceae), inhabiting snow patches. Am J Bot 80: 1300-1304. DOI
86	Liang L, Schwartz MD, Fei S. 2011. Examining spring phenology of forest understory using digital photography. In: Proceedings 17th Central Hardwood Forest Conference (Fei S, Lhotka JM, Stringer JW, Gottschalk KW, Miller GW, eds). USDA Forest Service, Newtown Square, pp 51-57.
87	SRSAC. 2007a. Natural Resource Atlas of Tawang district, Arunachal Pradesh. State Remote Sensing Application Centre, Itanagar, Arunachal Pradesh.
88	SRSAC. 2007b. Natural Resource Atlas of West Kameng district, Arunachal Pradesh. State Remote Sensing Application Centre, Itanagar, Arunachal Pradesh.
89	Sundriyal RC. 1990. Phenology of some temperate woody species of the Garhwal Himalaya. Int J Ecol Environ Sci 16: 107-117.
90	Tooke F, Battey NH. 2010. Temperate flowering phenology. J Exp Bot 61: 2853-2862. DOI
91	Ibanez I, Primack RB, Miller-Rushing AJ, Ellwood E, Higuchi H, Lee SD, Kobori H, Silander JA. 2010. Forecasting phenology under global warming. Philos Trans R Soc Lond B Biol Sci 365: 3247-3260. DOI
92	Ibarra-Manriquez G, Oyama K. 1992. Ecological correlates of reproductive traits of Mexican rain forest trees. Am J Bot 79: 383-394. DOI
93	Ibarra-Manriquez G, Sanchez-Garfias B, Gonzalez-Garcia L. 1991. Fenologia de lianas y arboles anemocoros en una selva calido-humeda de Mexico. Biotropica 23: 242-254. DOI
94	Inouye DW, Wielgolaski FE. 2003. High altitude climates. In: Phenology: An integrative Environmental Science (Schwartz MD, ed). Kluwer Academic Publishers, Dordrecht, pp 195-214.
95	IPCC. 2007. Summary for Policymakers. In: Climate Change 2007 : The Physical Science Basis : Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL, eds). Cambridge University Press, Cambridge, 18 pp.
96	Jackson LE, Bliss LC. 1984. Phenology and water relations of three plant life forms in a dry tree-line meadow. Ecology 65: 1302-1314. DOI
97	Jain SK, Rao RR. 1977. A handbook of field and herbarium methods. Today and Tomorrow's Printers and Publishers, New Delhi, 157 pp.
98	Johansen C, Waseque M, Begum S. 1985. Effect and interaction of photoperiod, temperature, water stress and nitrogen on flowering and growth in jute. Field Crop Res 12: 397-406. DOI
99	Liang L, Schwartz MD. 2009. Landscape phenology: an integrative approach to seasonal vegetation dynamics. Landsc Ecol 24: 465-472. DOI
100	Lieberman D. 1982. Seasonality and phenology in a dry tropical forest in Ghana. J Ecol 70: 791-806. DOI
101	Lu P, Yu Q, Liu J, Lee X. 2006. Advance of tree-flowering dates in response to urban climate change. Agr For Meteorol 138: 120-131. DOI
102	Lucier AA, Hinckley TM. 1982. Phenology, growth and water relations of irrigated and non-irrigated black walnut. For Ecol Manag 4: 127-142. DOI
103	Luedeling E, Girvetz EH, Semenov MA, Brown PH. 2011. Climate change affects winter chill for temperate fruit and nut trees. PLoS One 6: e20155. DOI
104	Ma Q, Longnecker N, Dracup M. 1997. Nitrogen deficiency slows leaf development and delays flowering in narrow-leafed Lupin. Ann Bot 79: 403-409. DOI
105	Mao AA, Dash SS, Singh P. 2017. Rhododendrons of North East India : a pictorial handbook. Botanical Survey of India, Kolkata, 167 pp.
106	Marques MCM, Roper JJ, Salvalaggio APB. 2004. Phenological patterns among plant life-forms in a subtropical forest in southern Brazil. Plant Ecol 173: 203-213.
107	van Schaik CP, Terborgh JW, Wright SJ. 1993. The phenology of tropical forests: adaptive significance and consequences for primary consumers. Annu Rev Ecol Syst 24: 353-377. DOI
108	Walther GR, Post E, Convey P, Menzel A, Parmesan C, Beebee TJ, Fromentin JM, Hoegh-Guldberg O, Bairlein F. 2002. Ecological responses to recent climate change. Nature 416: 389-395. DOI
109	Wan MW, Liu XZ. 1979. Method of phenology observation of China. Science Press, Beijing, pp 1-22.
110	Wielgolaski FE. 2001. Phenological modifications in plants by various edaphic factors. Int J Biometeorol 45: 196-202. DOI
111	Wolkovich EM, Cook BI, McLauchlan KK, Davies TJ. 2014. Temporal ecology in the Anthropocene. Ecol Lett 17: 1365-1379. DOI
112	Wright SJ, Calderon O. 1995. Phylogenetic patterns among tropical flowering phenologies. J Ecol 83: 937-948. DOI
113	Yelemou B, Zougmore R, Bationo BA, Millogo-Rasolodimby J, Hien V. 2009. Phenology and fruit production of Piliostigma reticulatum (DC), Hochst., an agroforestry forage species in the Sahel. Cameroon J Exp Biol 5: 10-20.
114	Zhang G, Song Q, Yang D. 2006. Phenology of Ficus racemosa in Xishuangbanna, Southwest China. Biotropica 38: 334-341. DOI
115	Joiner JN, Gruis JT. 1959. Effects of nitrogen and potassium levels on growth, flowering and chemical composition of Zinnia and Marigold. J Am Soc Hortic Sci 74: 445-447.
116	Kalbarczyk R. 2009. Air temperature changes and phenological phases of field cucumber (Cucumis sativus L.) in Poland, 1966-2005. Hortic Sci 36: 75-83. DOI