Vegetos
(An International Journal of Plant Research & Biotechnology)
Plant architecture manipulation and growth retardants influencing the Pot presentability of China aster (Callistephus chinensis L. Nees)
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Wani Tabinda, Banday Neelofar, Nazki Imtiyaz Tahir, Mir Shakeel Ahmad, Bhat Momin Showkat, Khan Farooq Ahmad
Research Articles | Published: 25 April, 2024
Online ISSN : 2229-4473.
Website:www.vegetosindia.org
Pub Email: contact@vegetosindia.org
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Keywords:
Pot presentability, Pinching, Chlormequat, Paclobutrazol, China aster, DAT-Days after transplanting
Abstract
Pot presentability affects the overall aesthetic quality of ornamental plants, and is thus a key factor in their marketability. The major factors determining pot presentability are the growth and flowering of plants, which can be manipulated by changes in plant architecture through either pinching or application of plant growth retardants or both. The experiment included two levels of pinching: No pinching (P0) and Pinching (P1), two different growth retardants with three levels (concentrations): Chlormequat chloride (C0-0 ppm, C1-100 ppm, C2-200 ppm) and Paclobutrazol (P0-0 ppm, P1-50 ppm, P2-75 ppm) and were applied once after 15 days of pinching. The experiment was laid out in Completely Randomised Design and replicated thrice. The results showed that pinching and the use of growth retardants contributed to more compact and well-proportioned plant growth. Pinching promoted lateral branching which leads to a bushier and fuller appearance and the growth retardants (Chlormequat chloride and Paclobutrazol) reduced internodal growth resulting in a more compact and controlled growth habit. The results indicated decreased plant height (26.68 cm, 25.90 cm, 26.23 cm), enhanced branch number (8.26, 9.93, 8.69), enhanced field life (69.78 DAT, 66.20 DAT, 69.15 DAT) and enhanced relative water content of petals (65.93%, 64.64%, 64.16%) with pinching, Chlormequat chloride (CCC)-200 ppm and Paclobutrazol-75 ppm respectively. This enhanced form and shape plus prolific and longer lasting blooms made the plant look more aesthetically pleasing and balanced in a pot. Pinching along with growth retardants (C2-200 ppm and Pb2-75 ppm) i.e., T18 was found to reduce stem length (24.27 cm), increased branching (11.56) and fullness or plant spread (28.00 cm), increased floral diameter (5.26 cm), increased field life (74.89 days), and increased relative water content of petals (85.75%) compared to the control plants. These parameters were analysed and used to compute the pot presentability of China aster plants which is a crucial factor in the marketability of potted plants and was done on the basis of modified Conover scale (1986). The results revealed that maximum pot presentability of 91.67 points were exhibited by pinched plants treated with 200 ppm of CCC and 75 ppm of paclobutrazol (T18).
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Acknowledgements
Author Information
Division of Floriculture and Landscape Architecture, Sher e Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, India
wanitabinda09@gmail.com
Division of Floriculture and Landscape Architecture, Sher e Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, India
Division of Floriculture and Landscape Architecture, Sher e Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, India
Division of Statistics, Sher e Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, India
Division of Floriculture and Landscape Architecture, Sher e Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, India
Division of Basic Science and Humanities, Sher e Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, India