Beena R creator Mercy S T (Guide) text xx Vellayani Department of Plant Physiology, College of Agriculture 2000 9999 monographic und

print

An investigation on the effect of growth regulators on growth and flowering of Anthurium andreanum Linden was conducted in the Department of Plant Physiology, College of Agriculture, Vellayani during 1998-2000. Mature plants of three varieties of Anthurium andreanum Linden formed the material. The varieties used were Liver Red (L.R.), Ceylon Red (C.R.) and Kalympong Orange (K.O.). Three growth regulators namely Gibberellic Acid (GA), Tri Iodo Benzoic Acid (TIBA) and Kinetin (K) were used at 100 ppm, 300 ppm and 500 ppm concentrations. Two controls i.e., distilled water spray and no spray were also included. Each concentration of the growth regulator was sprayed three times at one month intervals. Observations were taken three months after the first spray and then at three months intervals, twice more. The effect of treatments on morphological floral, physiological and bio-chemical aspects was studied. Results of the experiments revealed that growth regulators had significant effect on most of the characters under study. They are listed below. ;.. Maximum plant height was obtained nine months after the first spray for K.O. treated with GA at 500 ppm (69.82 cm). ;.. Minimum plant spread (EW) - nine months afte~ the first spray was obtained for K.O. treated with TIBA at 100 ppm (28.44 cm) and minimum plant spread (NS) was recorded by K.O. - no spray (28.02 cm) in the ninth month of observation. 8J • ~ Maximum number of leaves/spadices per year (9.0) was recorded by C.R. treated with GA at 300 and 500 ppm. ~ Minimum number of days (40.8) taken for successive leaf production was obtained for C.R. treated with GA at 300 and 500 ppm. ~ Highest" number of suckers/plant (4.6) was produced by K.O. treated with GA at 500 ppm, obtained nine months after the first spray. ~ The highest length of spadix (43.52 cm) was showed six months after the first spray by L.R. treated with GA at 500 ppm. ~ Largest spathe (95.4 cm2) was recorded three months after the first spray by K.O. treated with GA at 500 ppm. ~ Highest longevity of spadix (103 days) was obtained for L.R. treated with kinetin at 500 ppm. ~ Smallest candle size was obtained nine months after the first spray by the variety C.R. treated with TIBA at 500 ppm (4.1 cm). ~ Highest chlorophyll content (2.16 mg/g tissue) was recorded rune months after the first spray by K.O. treated with GA at 500 ppm. ~ Highest carotenoid content (10.41 mg/lOO g sample) was obtained six months after the first spray by L.R. treated with GA at 300 ppm. ~ Highest anthocyanin content (388.2 mg/l OOg sample) was recorded six months after the first spray by L.R. (control 1) distilled water spray. ~ Highest protein content (109 mg/ g tissue) was obtained six months after the first spray by K.O. treated with kinetin at 500 ppm. ~ Highest phenol content (121.2 mg/g tissue) was recorded three months after the first spray by K.O. treated with kinetin at 500 ppm. Based on the economics of growth regulator application, G.A. 500 ppm was the best treatment with positive profit increase in all the three varieties. This treatment achieved an enhanced profit of Rs. 133.70 per plant per year in the variety L.R., Rs. 86.30 enhanced profit in K.O. and Rs. 70.10 in the variety C.R. MSc 632.3 BEE/EF http://krishikosh.egranth.ac.in/handle/1/5810105200 http://krishikosh.egranth.ac.in/handle/1/5810105200 140128 20220829145136.0