RELATIONSHIP BETWEEN STRESS AND FLOWERING IN HELICONIA (Heliconia stricta)

K. NIHAD¹*, V. KRISHNAKUMAR², V.L. SHEELA^3
1Central Plantation Crops Research Institute, Regional Station, Kayamkulam, 690533, Kerala, India
²Central Plantation Crops Research Institute, Regional Station, Kayamkulam, 690533, Kerala, India
³College of Agriculture, Vellayani, Kerala Agricultural University, Thiruvananthapuram, Kerala, 695522, India
* Corresponding Author : nihadshukoor@gmail.com

Received : 05-02-2018     Accepted : 13-02-2018     Published : 15-02-2018
Volume : 10     Issue : 3       Pages : 5137 - 5139
Int J Agr Sci 10.3 (2018):5137-5139
DOI : http://dx.doi.org/10.9735/0975-3710.10.3.5137-5139

Keywords : Nutrient management practices, Heliconia, stress
Academic Editor : Dr Safeena S. A., Ramesh Kumar
Conflict of Interest : None declared
Acknowledgements/Funding : The work is being carried out at ICAR-CPCRI, Regional Station, Kayamkulam as part of the PhD (Hort.) thesis of the senior author from Kerala Agricultural University, India. The authors are grateful to Dr George V. Thomas, Director, CPCRI and Dr P.M. Jacob, Head, CPCRI (Regional Station), Kayamkulam for the facilities and encouragement provided for the study. The technical support of Dr M. Shanavas and Dr C.K. Nampoothiri is acknowledged
Author Contribution : All author equally contributed

Leaf chlorosis followed by flowering was noticed in Heliconia plants supplied with organics alone during its early vegetative phase. This finding was recorded from the experiment on standardizing nutrient management practices for Heliconia in low fertile sandy soils with lesser water holding capacity. The main experiment was laid out at Central Plantation Crops Research Institute (Regional Station), Kerala State, India with five nutritional treatments and four replications in Randomised block design. During initial growth phase (four months after planting), plants grown under integrated management exhibited a healthy vegetative growth. Nevertheless, 90% of the plants supplied with organics alone exhibited leaf yellowing. It was observed that more than 60% plants with leaf chlorosis started to flower early (180 days after planting) but the flowers were of smaller size with 3 to 4 bracts. The results showed that the leaf nutrients such as K, Ca, Mg, Mn and Fe were lower in plants supplied with organics alone. The deficient leaves were found to have significantly lower leaf chlorophyll, relative water content and wax content. However, the deficiency symptoms of these plants disappeared one month after the second dose of manuring (i.e. seven months after planting). Plant height differed significantly only during the reproductive phase. Other growth parameters such as suckering habit, number of leaves and leaf area was recorded higher in plants supplied with adequate organic manures (T3) from eight months after planting. After recovery from the stress, plants started producing quality flowers with 6 to 7 bracts at 280 days after planting.

1. Kress W.J., Prince L.M. and Williams K.J. (2002) Am. J. of Bot., 89(11), 1682-1696
2. Castro A.C.R., Aragao F.A.S., Loges V., Costa A.S., Willadino L.G. and Castro M.F.A. (2011) Acta Hort., 886, 285-288.
3. Nihad K. (2013) Nutrient management practices for heliconia under open condition and as intercrop in coconut garden. PhD (Hort.) thesis, Kerala Agricultural University, Thrissur p. 142.
4. Nihad K and Krishnakumar V. (2011) Kerala Karshakan, .Nov.2011.pp.38-39
5. Ken O.C. (2007) Heliconia Basics.Green Culture Singapore[on line]. Available: www. greenculturesg. com
6. Bruna E.M., Nardy O., Strauss S.Y. and Harrison S. (2002) J. Ecol., 90, 639–649.
7. Panse V. J. and Sukhatme P. V. (1985) Statistical Methods for Agricultural Workers (4th Ed.). Indian Council of Agricultural Research, New Delhi, 347p.
8. Richard A.C and Broschat K.T. (1992) Horticultural Review, 14: 1-55
9. Yen C.B.S. (2008) Effects of nutrient supply and cooling on growth, flower bud differentiation and propagation of Nobile Dendrobium Orchid. MSc (Hort.) thesis, National Taiwan University, Taiwan.96p.
10. Xiangyang L., Guangxi R and Yan Shi (2011) Energy Procedia, 5, 1200-1204
11. Adams P., Nelson D. E., Yamada S., R. G. Wjensen and H.J. Bohnert. (1998) New Phytol., 138, 171-190.
12. Fontaine S., Mariotti A and Abbadie L. (2003) Soil Biology and Biochemisrty, 35, 837-843
13. K. Nihad and V. Krishnakumar (2015) Acta Hortic., 1104, 497-504.
14. Aronson J., Kigel J., Shmida A and Klein J. (1992) Oecologia., 89, 17-26.
15. Achard H., Cheng L De Grauwe., Decat J., Schoutteten H. and Motirz T. (2006) Science, 311, 91-94.