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

Figure 1

Effect of six concentrations of irradiated carrageenan (0, 20, 40, 60, 80, and 100 mg L⁻¹) on net photosynthetic rate (a), stomatal conductance (b), leaf alkaloid content (c), and leaf alkaloid yield (d) of Catharanthus roseus L. studied at 120 and 150 DAP. Means within a column followed by the same letter(s) are not significantly different (). Bars (⊤) represent the LSD at 5%.

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