Effects of Shading on Structural Characteristics of the Leaf and Yield of Fruit in Capsicum annuum L1,2

Abstract

Two groups of peppers, cv. Yolo Wonder, were cultivated and examined during their vegetative growth period, 1 group in full sun, the other in shade. An analysis of early foliation was initiated following appearance of 3 leaves characteristic of the juvenile growth stage. Observation of the epiderm is indicated that shading increases leaf surface, increases cell division, and cell expansion. Shade decreases the number of stomata per mm 2 and the percentage of stomata in relation to other cells. Shade also increases by more than 40% the overall wt of dry materials. After flowering, the 2 lots were transplanted under identical conditions to open fields. Analysis of their fruit yield confirms recommendation of shading during the vegetative growth period in tropical regions.