African Journal of Plant Science - Academic Journals

More documents

Recommendations

Info

REFERENCES Dobres M, Williams L, Gail R (1998). Micropropagation of rose plants. United States patent, 5: 843: 782. Drefahl A, Quoirin MG, Cuquel FL (2007). Micropropagation of Rosa × hybrida cv. Vegas via axillary buds. Acta Horticulturae, 751: 407-411. Hameed N, Shabbir A, Ali A, Bajwa R (2006). In vitro micropropagation of disease free rose (Rosa indica L.), Mycopath, 4: 35-38. Hsia CN, Korban SS (1996). Organogenesis and somatic embryogenesis in callus cultures of Rosa hybrida and Rosa chinensis minima. Plant Cell Tissue and Organ Culture, 44: 1-6. Ibrahim R, Debergh PC (2001). Factors controlling high efficiency of adventitious bud formation and plant regeneration from in vitro leaf explants of roses (Rosa hybrida). Scientia Horticulturae, 88: 41-57. Kanchanapoom K, Sakpeth P, Kanchanapoom K (2010). In vitro flowering of shoots regenerated from cultured nodal explants of Rosa hybrida cv. 'Heirloom'. Sci. Asia, 36: 161-164. Khosh-Khui M, Jabbarzadeh Z (2007). Effects of several variables on in vitro culture of Damask Rose (Rosa damascena Mill.). Acta Horticulturae. 751: 389-393. Kim CK, Chung JD, Jee SO, Oh JY (2003). Somatic embryogenesis from in vitro grown leaf explants of Rosa hybrida L. Afri. J. Plant Biotechnol., 5(3): 169-172. Kim SW, Oh SC, In DS, Liu JR (2003). Plant regeneration of rose (Rosa hybrida) from embryogenic cell-derived protoplasts. Plant Cell Tissue and Organ Culture, 73: 15-19. Kintzios S, Manos C, Makri, O (1999). Somatic embryogenesis from mature leaves of rose (Rosa sp.). Plant Cell. Reports, 18: 467-472. Kumar A, Sood A, Plani UT, Gupta AK, Plani LMS (2001). Micropropagation of Rosa damascene Mill. from mature bushes using thidiazuron, J. Horticult. Sci., 76: 30-34. Murashige T, Skoog F (1962). A revised medium for rapid growth and bioassays with tobacco tissue cultures. Physiologia Plantarum, 15: 473-497. Farahani and Shaker 281 Nak-Udom N, Kanchanapoom K, Kanchanapoom K (2009). Micropropagation from cultured nodal explants of rose (Rosa hybrida L. cv. 'Perfume Delight'). Songkalnakarin, J. Sci. Technol., 31(6): 583-586. Previati A, Benelli C, Da Re F, Ozudogru A, Lambradi M (2008). Micropropagation and in vitro conservation of virus-free rose germplasm. Propagation of Ornamental Plants, 8: 93-98. Razavizadeh R, Ehsanpour AA (2008). Optimization of in vitro propagation of Rosa hybrida L. Cultivar Black Red, American- Eurasian J. Agric. Environ. Sci., 3(1): 96-99. Rout GR, Mohapatra, A, Mohan Jain S (2006). Tissue culture of ornamental pot plant: A critical review on present scenario and future prospect, Biotechnol. Adv., 24: 531-560. Shabbir A, Hameed N, Ali A, Bajwa R (2009). Effect of different cultural conditions on micropropagation of rose (Rosa indica L.), Pak. J. Bot., 41(6): 2877-2882. Telgen H, Elagoz V, Mil A, Paffen A, klerk G (1992). Role of plant hormones in lateral bud growth of rose and apple in vitro, Acta Hort. 319: 137-142. Vu NH, Anh PH, Nhut DT (2006). The role of sucrose and different cytokinins in the in vitro floral morphogenesis of rose (hybrid tea) cv. ‘First Prize’. Plant Cell Tissue and Organ Culture, 87: 315-320. Wang GY, Yuan MF, Hong Y (2002). In vitro flower induction in roses. In vitro Cellular and Developmental Biology-Plant, 38: 513-518. Xing W, Bao M, Qin H, Ning G (2010). Micropropagation of Rosa rugosa through axillary shoot proliferation. Acta Biologica Cracoviensia Series Botanica, 52(2): 69-75.
African Journal of Plant Science Vol. 6(10), pp. 282-289, July, 2012 Available online at http://www.academicjournals.org/ajps DOI: 10.5897/AJPS12.083 ISSN 1996-0824 ©2012 Academic Journals Full Length Research Paper Effect of time of harvest on physiological maturity and kenaf (Hibiscus canabinus) seed quality Olasoji J. O. 1 *, A. O. Aluko 1 , O. N. Adeniyan 1 , S. O. Olanipekun 1 , A. A. Olosunde 2 and Okoh J. O. 3 1 Institute of Agricultural Research and Training, Obafemi Awolowo University, Moor Plantation, Ibadan, Nigeria. 2 National Centre for Genetic Resources and Biotechnology, Moor Plantation, Ibadan, Nigeria. 3 Department of Plant Breeding and Seed Science, University of Agriculture, PMB 2373, Markurdi, Nigeria. Accepted 15 May, 2012 Field experiments were carried out between July and December 2010 and 2011 at research station of the Institute of Agricultural Research and Training, Obafemi Awolowo University, Moor Plantation, Ibadan, to determine the effects of time of harvesting on kenaf seed physiological maturity and quality. Kenaf seed of 10 genotypes were collected at seven harvesting periods. Seeds were harvested at 5 day interval from 15 to 45 days after flowering (DAF). Significant variation was observed in all the kenaf genotypes for all the parameters studied. Maximum seed quality as measured by seed viability, moisture content, seed mass and germination percentage were obtained at 35 DAF. However, seed quality of kenaf genotypes reduced thereafter with age and pre-harvest sprouting on mother plant occurred. Maximum seed weight (mass maturity) was achieved at 35DAF in both years when average seed moisture contents were 20.58 and 19.28%, respectively. For high seed quality, kenaf is better harvested at 35 DAF which could be regarded as the point of physiological maturity. Key words: Kenaf, harvesting period, seed quality, mass maturity, physiological maturity. INTRODUCTION Seed development is the period between fertilization and maximum fresh weight accumulation and seed maturation begins at the end of seed development and continues till harvest (Mehta et al., 1993). The seed reaches its maximum dry weight at physiological maturity. Studies on seed development and physiological maturity become important because seeds should be harvested at proper time to ensure their quality in terms of viability and vigor. Seed quality can be limited by environmental conditions both before and after physiological maturity, the stage of development at which the seed possesses its maximum dry mass (Indira and Dharmalingam, 1996). Seeds gradually attain viability and vigor during the developmental process as seed dry weight is accumulated. Maximum seed quality may be achieved at the end of seed filling period (Harington, 1972; Browne, 1978; Tekrony and Hunter, 1995; Tekrony and Egli, 1997) *Corresponding author. E-mail: juliusolasoji@yahoo.com. or slightly after this phase (Pieta Filho and Ellis, 1991; Ellis et al., 1993; Zanakis et al., 1994; Sanhewe and Ellis, 1996; Demir and Samit, 2001; Lehner et al., 2006; Ghassemi-Golezani and Mazloomi-Oskooyi, 2008; Ghassemi-Golezani and Hosseinzadeh-Mahootchy, 2009). The end of seed filling phase is described as physiological maturity (Harington, 1972) or mass maturity (Ellis and Pieta Filho, 1992). Viability, the least discriminating measure of seed quality, is quickly gained during seed development and strongly maintained after maturity relative to germination ability. Stage of maturity at harvest is one of the most important factors that can influence the quality of seeds (Demir et al., 2008). Harvesting too early may result in low yield and quality, because of the partial development of essential structures of seeds (Keller and Kollmann, 1999; Elias and Copeland, 2001; Ekpong and Sukprakarn, 2008; Wang et al., 2008). Whereas, harvesting too late may increase the risk of shattering and decrease the quality of seeds due to ageing. Adverse environmental conditions such as rainfall or precipitation may also result
Page 1 and 2: African Journal of Plant Science Vo
Page 3 and 4: Editors Prof. Diaga Diouf Laboratoi
Page 5 and 6: Electronic submission of manuscript
Page 7 and 8: Fees and Charges: Authors are requi
Page 9 and 10: African Journal of Plant Science Vo
Page 11 and 12: 272 Afr. J. Plant Sci. Cell density
Page 13 and 14: 274 Afr. J. Plant Sci. Figure 4. Th
Page 15 and 16: 276 Afr. J. Plant Sci. reciprocal o
Page 17 and 18: 278 Afr. J. Plant Sci. Number of Le
Page 19: 280 Afr. J. Plant Sci. Table 1. Eff
Page 23 and 24: 284 Afr. J. Plant Sci. Table 1. ken
Page 25 and 26: 286 Afr. J. Plant Sci. Table 3. Con
Page 27 and 28: 288 Afr. J. Plant Sci. Figure 4. Re
Page 29 and 30: UPCOMING CONFERENCES 18th Australas
Page 31: African Journal of Plant Science Re

African Journal of Plant Science - Academic Journals

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?