Growth, nitrogen, chlorophyll, and carotenoid content of Gynura procumbens (Lour) Merr. leaves at different shade

Abstract

The objectives of this research were to find out the influence and optimal different shading on growth, nitrogen, carotenoid, and chlorophyll content of Gynura procumbens leaf. Research was carried out in the greenhouse of Faculty of Agriculture Sebelas Maret University and Central Laboratory Sebelas Maret University Surakarta, in June until October 2003. Completely randomized design with single factor was used as follow: 0%, 40%, and 70% shading with 10 replications each treatment. Observation including growth parameters (plant height, surface leaf’s area, dry weight) and the contents of nitrogen, chlorophyll, and carotenoid. Data collected were analyzed using analysis of variance (ANOVA) followed by DMRT test at 5% confidence level and regression test. The result indicated that 40% shading had proven to increase growth parameters, 70% shading giving significant effect on nitrogen and chlorophyll content, while 0% shading showed to increase carotenoid content.

Saurophus androgynus L. Merr. response to different shades intensities and fertilizer rates

“…This is consistent with the research, where 70% shading resulted in an increase in the total chlorophyll content of the leaves. On the other hand, at 0% shading, the total chlorophyll content produced was smaller [13]. Further orthogonal polynomial tests show that shading intensity has a linear and quadratic effect on leaf chlorophyll content, as shown in Table 5.…”

Effects of Shade and Biochar Application on the Quercetin Content of Longevity Spinach in Inceptisol

“…According to Pradnyawan et al [26], Gynura procumbens plants under 70% shade condition produce the highest nitrogen content compared to those under 50% and 0%. It is because, under 70% shade conditions, there is a buildup of nitrogen in the form of NH4 + and NO3in plant Applied and Environmental Soil Science glutamine.…”

“…According to Pradnyawan et al [26], plant chlorophyll content, both chlorophyll a and chlorophyll b, will increase under 70% shade conditions. e same thing was conveyed by Amini et al [27] that shaded plants will produce more chlorophyll, especially chlorophyll b, compared to plants without shade.…”