Morpho-histological consistency on petiole length elongation ofAnthuriumunder partial shades©

Abstract

In Anthurium, the consistency of partial shading is of crucial importance in relation to the elongation of petiole length, but the anatomical basis for these responses is a question. In this study, we investigated the effects of partial shade on the anatomical aspect of elongation changes in petioles by determining the changes in cell size, cell number, and total cell area. From a histological perspective, three developmental processes, cell size, cell numbers, and total cell area, are responsible for the length of a given petiole. The experiment was conducted by utilizing three shading treatments, i.e., full sunlight, 40% reduced light, and 60% reduced light. Morphological traits (plant height and petiole length), histological traits (cell size, cell number, and total cell area), characterizing the petioles, as well as the physiological traits (SPAD value and leaf area) characteristics were measured. We found that plant height, leaf area, and SPAD value increased linearly with increasing partial shade. In this context, cell size, cell number, and total cell area also increased with increased petiole elongation.