Effect Of The Stress On The Three Kinds Of Crassulaceae Echeveria Succulents Leaves Coloring

In order to change the status quo is not colored leaves of succulents, and to explore make succulents achieve management quality product cultivation phase, the test uses Sedum Echeveria succulents Monroe, Pink Lady, Olivia as the test material, these three succulents separately pH, moisture, salt three kinds of environmental stress, then analyzes the influence of colorant Stress of Three succulent leaves, as follows:When the pH of the solution 3,4,10,11, osmotic pressure of 440 mOsm/L, the blade three kinds of succulents significantly colored and growing well; when the osmotic pressure of the solution is 220 mOsm/L,330 mOsm/L, a solution of a salt concentration of 200mS/cm, 300mS/cm,400mS/cm when three succulents growing well, but the blade only slight coloring; pH value of the solution 5,6,7,8,9, osmotic pressure to 110 mOsm/L, solution concentration of 100mS/cm when three more meat plants are growing well, but the blade was not stained; pH value of the solution 1,2,12,13, osmotic pressure of 550 mOsm/L, a salt solution concentration of 500mmol/L, three kinds of succulents are subject to severe inhibition of growth, on the verge of death.Between three kinds of succulents there are species differences in response to Stress in Monroe most sensitive to acid, alkali, under severe water stress Leaves turn from green to red, and the Pink Lady Olivia and the reaction is not sensitive, and only blade edge turns red.Under Stress, stress time and with the deepening of the degree of environmental stress, the blade three kinds of succulents hue a* value, anthocyanin, antioxidant enzyme (SOD, POD, CAT) activity were increased, while chlorophyll content was decreased. When three kinds of succulents suffered Stress, antioxidant enzymes as a radical substance, a sharp increase in activity in the first 5 days of treatment, anthocyanin in the first 10 days is synthesized in large quantities, as an antioxidant to eliminate free radicals substances the first 15 days, the coloring on the leaves manifested blade hue a* rapid rise in leaf color deepened.