Abstract
This study aimed to evaluate the effects of partially N-acetylated chitosans with a degree of acetylation (DA) of 10% on in vitro propagation of an ornamental plant, Ipomoea purpurea, by emphasizing the importance of the degree of polymerization (DP) on in vitro plant development. The effects of either a chitosan oligomer mixture with a DP between 2 and 15 (5.0, 10.0, and 20.0 mg L−1) or chitosan polymer with a DP of 70 were compared with commonly used cytokinins [6-benzylaminopurine (BAP) and kinetin (KIN) at 0.5, 1.0, 2.0, and 4.0 mg L−1] and auxins [indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) at 0.25, 0.5, 1.0, and 2.0 mg L−1]. The nodal explants used in this study were taken from donor plants obtained by germination of the seeds. The results indicated that all chitosan treatments had positive effects on the shoot induction, but only the oligomer mixture at 5 mg L−1 gave the best results for mean shoot number, shoot length, and leaf number, compared to the other treatments and control. Also, all chitosan treatments increased mean number of roots and triggered adventitious root induction. However, root elongation was decreased in the presence of chitosan in the medium. The root elongation-inhibitory effects of chitosan become clearer in the presence of oligomer mixture. In general, chitosan had similar effects with tested cytokinins rather than auxins. The results of this study suggested that the application of chitosan oligomers—rather than polymers—can be an eco-friendly and effective alternative to synthetic cytokinins in horticulture.

Similar content being viewed by others
Explore related subjects
Discover the latest articles and news from researchers in related subjects, suggested using machine learning.References
Acemi A, Özen F, Kiran R (2013) In vitro propagation of Amsonia orientalis Decne. from nodal segments of adult plants. Propag Ornam Plants 13(1):25–32
Acemi A, Türker-Kaya S, Özen F (2016) FT-IR spectroscopy based evaluation of changes in primary metabolites of Amsonia orientalis after in vitro 6-benzylaminopurine treatment. Not Bot Hort Agrobot 44(1):209–214
Andrews M, Raven JA, Lea PJ (2013) Do plants need nitrate? The mechanisms by which nitrogen form affects plants. Ann Appl Biol 163(2):174–199
Asghari-Zakaria R, Maleki-Zanjani B, Sedghi E (2009) Effect of in vitro chitosan application on growth and minituber yield of Solanum tuberosum L. Plant Soil Environ 55(6):252–256
Bañuelos-Hernández KP, García-Nava JR, Leyva-Ovalle OR, Peña-Valdivia CB, Trejoa C, Ybarra-Moncada MC (2017) Chitosan coating effect on vase life of flowering stems of Heliconia bihai (L.) L. cv. Halloween. Postharvest Biol Technol 132:179–187
Bayraktar M, Naziri E, Akgun IH, Karabey F, Ilhan E, Akyol B, Bedir E, Gurel A (2016) Elicitor induced stevioside production, in vitro shoot growth, and biomass accumulation in micropropagated Stevia rebaudiana. Plant Cell Tissue Organ Cult 127:289–300
Brechu-Franco AE, Ponce-Salazer RM, Laguna-Herandez G, Marques-Guzman J (2000) Effect of thermal storage on seed coat dormancy and germination of Ipomoea purpurea (L.) Roth (Convolvulaceae) seeds. J Exp Bot 67:187–194
Chen L, Bhagsari A, Carter J (2006) Effects of medium composition and culture duration on in vitro morphogenesis of sweet potato. J Biol Plant 50(1):114–117
Cheong EJ, An C (2015) Effect of carbohydrates on in vitro shoot growth of various Prunus species. Korean J Plant Resour 28(3):357–362
Corsi B, Riccioni L, Forni C (2015) In vitro cultures of Actinidia deliciosa (A. Chev) C.F. Liang & A.R. Ferguson: a tool to study the SAR induction of chitosan treatment. Org Agric 5(3):189–198
Da Costa CT, De Almeida MR, Ruedell CM, Schwambach J, Maraschin FS, Fett-Neto AG (2013) When stress and development go hand in hand: main hormonal controls of adventitious rooting in cuttings. Front Plant Sci 4:133
Das SN, Madhuprakash J, Sarma PVSRN, Purushotham P, Suma K, Manjeet K, Rambabu S, El Gueddari NE, Moerschbacher BM, Podile AR (2015) Biotechnological approaches for field applications of chitooligosaccharides (COS) to induce innate immunity in plants. Crit Rev Biotechnol 35(1):29–43
El-Miniawy SM, Ragab ME, Youssef SM, Metwally AA (2013) Response of strawberry plants to foliar spraying of chitosan. Res J Agric Biol Sci 9(6):366–372
Foley ME (1992) Effect of soluble sugars and gibberellic acid in breaking dormancy of excised wild oat (Avena fatua) embryos. Weed Sci 40(2):208–214
Gamborg OL, Miller RA, Ojima K (1968) Nutrient requirements of suspension cultures of soybean root cells. Exp Cell Res 50:151–158
Govindaraju S, Indra Arulselvi P (2016) Effect of cytokinin combined elicitors (l-phenylalanine, salicylic acid and chitosan) on in vitro propagation, secondary metabolites and molecular characterization of medicinal herb—Coleus aromaticus Benth (L). J Saudi Soc Agric Sci (in press). https://doi.org/10.1016/j.jssas.2016.11.001
Ha S, Vankova R, Yamaguchi-Shinozaki K, Shinozaki K, Tran LSP (2012) Cytokinins: metabolism and function in plant adaptation to environmental stresses. Trends Plant Sci 17:172–179
Haebel S, Bahrke S, Peter MG (2007) Quantitative sequencing of complex mixtures of heterochitooligosaccharides by vMALDI-linear ion trap mass spectrometry. Anal Chem 79(15):5557–5566
Jayasuriya KMG, Baskin JM, Geneve LR, Baskin CC (2007) Morphology and anatomy of physical dormancy in Ipomoea lacunosa: identification of the water gap in seeds of Convolvulaceae (Solanales). Ann Bot 100(1):13–22
Kananont N, Pichyangkura R, Chanprame S, Chadchawan S, Limpanavech P (2010) Chitosan specificity for the in vitro seed germination of two Dendrobium orchids (Asparagales: Orchidaceae). Sci Hortic 124:239–247
Kher MM, Nataraj M, Parmar HD, Buchad H (2015) Micropropagation of Merremia quinquefolia (L.) Hallier F. from nodal explants. J Hort Res 23(1):13–16
Kowalski B, Terry FJ, Herrera L, Peñalver DA (2006) Application of soluble chitosan in vitro and in the greenhouse to increase yield and seed quality of potato minitubers. Potato Res 49:167–176
Lopez-Moya F, Escudero N, Zavala-Gonzalez EA, Esteve-Bruna D, Blázquez MA, Alabadí D, Lopez-Llorca LV (2017) Induction of auxin biosynthesis and WOX5 repression mediate changes in root development in Arabidopsis exposed to chitosan. Sci Rep 7:16813
Luan LQ, Ha VTT, Nagasawa N, Kume T, Yoshii F, Nakanishi TM (2005) Biological effect of irradiated chitosan on plants in vitro. Biotechnol Appl Biochem 41(1):49–57
Malik SK, Chaudhury R, Kalia RK (2005) Rapid in vitro multiplication and conservation of Garcinia indica: a tropical medicinal tree species. Sci Hortic 106:539–553
McGregor RL (1986) Flora of the great plains. The University Press of Kansas Lawrence, Kansas, USA
Mondal MMA, Malek MA, Puteh AB, Ismail MR, Ashrafuzzaman M, Naher L (2012) Effect of foliar application of chitosan on growth and yield in okra. Aust J Crop Sci 6(5):918–921
Murashige T, Skoog F (1962) A revised medium for rapid growth and bioassays with tobacco tissue culture. Physiol Plant 15:473–497
Nge KL, New N, Chandrkrachang S, Stevens WF (2006) Chitosan as a growth stimulator in orchid tissue culture. Plant Sci 170:1185–1190
Ohta K, Taniguchi A, Konishi N, Hosoki T (1999) Chitosan treatment affects plant growth and flower quality in Eustoma grandiflorum. HortScience 34(2):233–234
Pacurar DI, Perrone I, Bellini C (2014) Auxin is a central player in the hormone cross-talks that control adventitious rooting. Physiol Plant 151:83–96
Peterson MA, McMaster SA, Riechers DA, Skelton J, Stahlman PW (2016) 2,4-D past, present, and future: a review. Weed Technol 30:303–345
Pichyangkura R, Chadchawan S (2015) Biostimulant activity of chitosan in horticulture. Sci Hortic 196(30):49–65
Pornpienpakdee P, Singhasurasak R, Chaiyasap P, Pichyangkura R, Bunjongrat R, Chadchawan S, Limpanavech P (2010) Improving the micropropagation efficiency of hybrid Dendrobium orchids with chitosan. Sci Hortic 124(4):490–499
Quambusch M, Gruß S, Pscherer T, Winkelmann T, Bartsch M (2017) Improved in vitro rooting of Prunus avium microshoots using a dark treatment and an auxin pulse. Sci Hortic 220:52–56
Rademacher W (2015) Plant growth regulators: backgrounds and uses in plant production. J Plant Growth Regul 34:845–872
Santa-Maria M, Pecota KV, Yencho CG, Allen G, Sosinski B (2009) Rapid shoot regeneration in industrial ‘high starch’ sweetpotato (Ipomoea batatas L.) genotypes. Plant Cell Tissue Organ Cult 97:109–117
Schatz C, Viton C, Delair T, Pichot C, Domard A (2003) Typical physicochemical behaviors of chitosan in aqueous solution. Biomacromolecules 4:641–648
Sharma U, Kataria V, Shekhawat NS (2017) In vitro propagation, ex vitro rooting and leaf micromorphology of Bauhinia racemosa Lam.: a leguminous tree with medicinal values. Physiol Mol Biol Plants (in press) 23:969–977. https://doi.org/10.1007/s12298-017-0459-2
Sy DN, Dzung NA (2010) Study on chitooligosaccharide application for in vitro tissue culture of sweet potato (Ipomea batatas L.). J Chitin Chitosan 5(3):141–146
Timofeeva SN, Elkonin LA, Tyrnov VS (2014) Micropropagation of Laburnum anagyroides medic. through axillary shoot regeneration. In Vitro Cell Dev Biol—Plant 50(5):561–567
Tiffin P, Rausher MD (1999) Genetic constraints and selection acting on tolerance to herbivory in the common morning glory Ipomoea purpurea. Am Nat 154(6):700–716
Vårum KM, Anthonsen MW, Grasdalen H, Smidsrød O (1991) Determination of degree of N-acetylation and the distribution of N-acetyl groups in partially N-deacetylated chitins (chitosans) by high field NMR spectroscopy. Carbohydr Res 211(1):17–23
Vasconsuelo A, Giulietti AM, Boland R (2004) Signal transduction events mediating chitosan stimulation of anthraquinone synthesis in Rubia tinctorum. Plant Sci 166:405–413
Zolman BK, Martinez N, Millius A, Adham AR, Bartel B (2008) Identification and characterization of Arabidopsis indole-3-butyric acid response mutants defective in novel peroxisomal enzymes. Genetics 180(1):237–251
Author information
Authors and Affiliations
Corresponding author
Additional information
Editor: Ewen Mullins
Nour Eddine El Gueddari died February 8, 2018
Rights and permissions
About this article
Cite this article
Acemi, A., Bayrak, B., Çakır, M. et al. Comparative analysis of the effects of chitosan and common plant growth regulators on in vitro propagation of Ipomoea purpurea (L.) Roth from nodal explants. In Vitro Cell.Dev.Biol.-Plant 54, 537–544 (2018). https://doi.org/10.1007/s11627-018-9915-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11627-018-9915-0


