Radiation Processed Carrageenan Improves Plant Growth, Physiological Activities, and Alkaloids Production in Catharanthus roseus L.

Table 1

Effect of six foliar concentrations of irradiated carrageenan (ICR) on a number of leaves and average leaf area per plant of Catharanthus roseus L. at 120 and 150 DAP. Means within a column followed by the same letter(s) are not significantly different ().

Treatments (mg L^−1)	Number of leaves per plant		Average leaf area (cm^2)
	120 DAP	150 DAP	120 DAP	150 DAP
ICR 0	200.0^f	247.4^f	10.27^f	12.10^f
ICR 20	214.3^e	254.5^e	10.46^e	12.26^e
ICR 40	220.0^d	262.8^d	11.03^d	12.44^d
ICR 60	226.9^c	270.6^c	11.30^c	12.75^c
ICR 80	233.2^a	298.0^a	11.66^a	13.82^a
ICR 100	229.0^b	278.0^b	11.47^b	13.50^b
LSD at 5%	4.0	5.2	0.13	0.11